REGION 5 RAC2

PREPARED FOR

5

U.S. Environmental Protection Agency

PREPARED BY

CH2M HILLEcology and Environment, Inc.Environmental Design International, Inc.Teska Associates, Inc. FOR OFFICIAL USE ONLY

REGION 5 RAON 5 RAC2R E M E D I A L A C T I O N C O N T R A C T F O R

Remedial, Enforcement Oversight, andNon-Time Critical Removal Activities at Sites of Releaseor Threatened Release of Hazardous Substances in Region

SENTRY MONITORING WELL INSTALLATION REPORT

Remedial DesignVelsicol Chemical/Pine River Site, OU1 St. Louis, Michigan WA No. 013-TATA-0532/Contract No. EP-S5-06-01

February 2009

SENTRY MONITORING WELL INSTALLATION REPORT

VELSICOL CHEMICAL/PINE RIVER SITE, OU1 St. Louis, Michigan

WA No. 013-TATA-0532 / Contract No. EP-S5-06-01

February 2009

Contents

Acronyms and Abbreviations ..........................................................................................................v 1. Introduction.........................................................................................................................1-1

1.1 Background .............................................................................................................1-2 1.2 Site Geology and Hydrogeology..........................................................................1-3

2. Activities ..............................................................................................................................2-1 2.1 Isolation Casing and Sentry Monitoring Well Installation...............................2-1 2.2 Vertical Aquifer Sampling.....................................................................................2-1 2.3 Quarterly Groundwater Sampling.......................................................................2-2 2.4 Hydraulic Conductivity Testing (Slug Tests) .....................................................2-2

3. Results ..................................................................................................................................3-1 3.1 Geology....................................................................................................................3-1 3.2 Hydrogeology .........................................................................................................3-2

3.2.1 Hydraulic Conductivity Testing Results................................................3-2 3.2.2 Groundwater Elevations and Potentiometric Surface Maps...............3-2 3.2.3 Groundwater Velocity and Time of Travel Calculations.....................3-3

3.3 Laboratory Results .................................................................................................3-4 3.3.1 VAS Sampling Results ..............................................................................3-5 3.3.2 Quarterly Groundwater Sampling..........................................................3-8 3.3.3 Comparison to Michigan Part 201 Residential and Commercial I

Drinking Water Criteria .........................................................................3-10 3.3.4 Quarterly Groundwater Samples..........................................................3-11

4. Discussion............................................................................................................................4-1 4.1 Geology....................................................................................................................4-1 4.2 Groundwater Quality Data ...................................................................................4-2 4.3 Hydrogeology .........................................................................................................4-3

5. Conclusions .........................................................................................................................5-1 Appendixes

A Isolation Casing and Sentry Monitoring Well Installation B Hydraulic Conductivity Testing (Slug Tests) C Data Quality Evaluation Reports D Historical Well Logs Tables

1 Vertical Aquifer Samples 2 Hydraulic Conductivity Results 3 Sentry Well Groundwater Elevation Data 4 Groundwater Flow Velocity, February and April 2007 5 Time of Travel Calculations 6 Groundwater Quality Parameters, Sample Locations, Depths, and Designations 7 Vertical Aquifer Samples Analytical Results—November 28, 2006–February 16, 2007

MKE\090360007 III

VELSICOL CHEMICAL/PINE RIVE SITE, OU1: SENTRY MONITORING WELL INSTALLATION REPORT

IV MKE\090360007

8 City Well, MW 30I, MW 30D, and Sentry Well Analytical Results February 20–25, 2007 9 pCBSA Summary Table Figures

1 Sentry Well Location Map 2 Cross Section Location Map 3 Conceptual Geologic Cross Section Legend 4 Conceptual Geologic Cross Section A-A’ Sentry Well Installation 5 Conceptual Geologic Cross Section B-B’ Sentry Well Installation 6 Conceptual Geologic Cross Section C-C’ Sentry Well Installation 7 Potentiometric Surface Map, February 26, 2007 8 Potentiometric Surface Contour Map, April 9, 2007 9 Snapshots of EVS Model Showing Extent of 100 μg/L pCBSA Plume 10 Snapshots of EVS Model Showing Extent of 7,300 μg/L pCBSA Plume

Acronyms and Abbreviations

μg/L micrograms per liter

amsl above mean sea level

bgs below ground surface

COC chemicals of concern

CPB Cooper-Papadopulos-Bredehoeft

CWIZ City Well Intake Zones

DDE dichlorodiphenyldichloroethene

DDT dichlorodiphenyltrichloroethane

EVS Environmental Visualization Software

HBB hexabromobenzene

Kelley Kelley Dewatering, Inc.

MCL Maximum Contaminant Level

MDEQ Michigan Department of Environmental Quality

OU Operable Unit

PBB polybrominated biphenyl

pCBSA para-chlorobenzene sulfonic acid

Prosonic Prosonic Drilling, Inc.

RI remedial investigation

SMCL secondary maximum contaminant levels

SVOC semivolatile organic compound

TAL Target Analyte List

TOT time of travel

TRIS tris-2,3-dibromopropyl phosphate

VAS vertical aquifer sampling

VOC volatile organic compound

MKE\090360007 V

1. Introduction

Groundwater sampling data at the Velsicol Chemical/Pine River Site have indicated the presence of para-chlorobenzene sulfonic acid (pCBSA) in a number of the City of St. Louis, Michigan, municipal water supply wells. pCBSA is a byproduct of the manufacture of dichlorodiphenyltrichloroethane (DDT), and has been found at other Superfund sites that are located near former DDT manufacturing areas, or in areas that have received wastes associated with DDT manufacture. pCBSA is highly soluble in groundwater and is resistant to natural degradation. These properties make pCBSA very mobile in groundwater and a useful indicator compound to show potential contaminant migration pathways in groundwater. A Michigan Department of Environmental Quality (MDEQ) Part 201 Residential and Commercial I Drinking Water standard of 7,300 micrograms per liter (μg/L) has been established for pCBSA.

In response to the pCBSA detections in several City of St. Louis municipal water supply wells, eight sentry monitoring wells were installed in accordance with the Final Sentry Well Plan (CH2M HILL, 2006). Their primary purpose is to serve as a chemical detection monitoring well network designed to provide the City of St. Louis with advance warning of potential impacts stemming from migration of contaminants related to the Velsicol Chemical/Pine River Site. The sentry monitoring wells were installed in hydrologic zones at depths corresponding to the depths of the intake zones for the city wells.

In addition to providing a chemical detection monitoring well network, the results of this work will extend the depth of the current geologic model and enhance decisions made with respect to potential contaminant migration.

This report provides a description of the drilling and sampling activities completed from November 2006 though April 2007, and an evaluation and discussion of the results. Minor field deviations and adjustments from the Final Sentry Well Plan are documented. The specific activities conducted at the site consist of the following:

• Soil boring advancement and lithological characterization at the eight drilling locations

• Collection and laboratory analysis of 30 vertical aquifer samples (groundwater grab samples)

• Installation and development of eight sentry monitoring wells

• Collection and analysis of groundwater samples from the city wells and sentry monitoring wells

• Completion of hydraulic conductivity (slug) tests

MKE\090360007 1-1


This report is organized into five sections as follows:

• Section 1—Introduction—Contains background information on the site and sentry well installation activity.

• Section 2—Activities—Describes the specific field activities that were conducted including drilling and well installation, vertical aquifer sampling, quarterly groundwater sampling, and hydraulic conductivity testing.

• Section 3—Results—Presents the results obtained from the work performed including information on site geology, hydrogeology, and chemical analytical data.

• Section 4—Discussion—Presents a discussion of the results and new information obtained from this project.

• Section 5—Conclusions—Presents conclusions based on the results and new information obtained from this project.

1.1 Background The Velsicol Chemical/Pine River Site consists of two operable units that have been the subject of previous investigations and remedial actions. Operable Unit One (OU1) includes an approximately 52-acre land parcel commonly referred to as the “Main Plant Site,” once occupied by a chemical manufacturing plant that operated from 1935 to 1977. Products manufactured at the Main Plant Site included liquid and granular forms of bromide, magnesium oxide products, radioactive oxides, fire retardants (including polybrominated biphenyls [PBB] and tris-2,3-dibromopropyl phosphate [TRIS]), pesticides (including DDT), and hexabromobenzene (HBB). The plant was closed and listed on the Superfund National Priority List in September 1983. Prior to chemical manufacturing, the Main Plant Site had several other industrial facilities since the mid-1800s, including a lumber mill, oil refinery, and a salt processing plant.

OU1 also includes other adjacent and nearby properties that were used for disposal of materials from the Main Plant Site or showed evidence of contamination from chemicals originating from the Main Plant Site. The term “Site” shall exclude these additional properties and refer only to the Main Plant Site property within the context of this report.

Operable Unit Two (OU2) consisted of the contaminated sediments in the Pine River adjacent to the Site. Contamination in OU2 was addressed by an emergency removal action and a subsequent remedial action between 1998 and 2006.

The City of St. Louis maintains six municipal water supply wells (CW-1, CW-4, CW-5, CW-6, CW-7, and CW-8) that are screened in two water-bearing zones within the Lower Unit. City wells CW-6 and CW-7 (north of the Pine River) are screened approximately 120 to 140 feet below ground surface (bgs) and CW-1, CW-4, CW-5, and CW-8 (south of the Pine River) are relatively deeper, screened at approximately 180 to 230 feet bgs. Since September 2004, well sampling has indicated that pCBSA is regularly detected at CW-1, CW-4, CW-6, and CW-7.

1-2 MKE\090360007

1. INTRODUCTION

1.2 Site Geology and Hydrogeology Hydrostratigraphic Units

Shal

low

Uni

t

~715 feet amsl

~710 feet amsl

I Zone ~700 feet amsl

~685 feet amsl

Lower I Zone ~675 feet amsl

Inte

rmed

iate

Uni

t

~670 feet amsl

D Zone ~665 feet amsl

D2 Zone

~620 feet amsl

~595 feet amsl

City Well Intake Zone (D3 Zone)

~570 feet amsl

~550 feet amsl

Low

er U

nit

City Well Intake Zone (D4 Zone)

~520 feet amsl

The physical characteristics of the Site (including topography and hydrology, geology, hydrogeology, and contaminant and risk characteristics) are described in the Remedial Investigation Report for Operable Unit One, Velsicol Chemical Corporation Superfund Site, St. Louis, Gratiot County, Michigan (Weston Solutions of Michigan Inc., November 2006). The units that form the current conceptual hydrostratigraphic site model are summarized below and depicted in the schematic on the right:

The Shallow Unit. This unit consists of the saturated parts of the fill and alluvium, and is unconfined and typically about 11 feet thick. The low permeability cap at the surface of the Site acts to decrease infiltration to the Shallow Unit. The Site is also surrounded by a slurry wall, which impounds groundwater in the Shallow Unit at the western and northern boundary with the river by up to 5.5 feet above the water levels outside, and restricts flow onto the Site at the southern and eastern boundary. The remedial investigation (RI) indicated that water in this unit generally flowed toward the river in areas where the Site borders the Pine River, with areas in the southern portion of the Site showing groundwater flow to the northwest.

The Intermediate Unit. This unit consists of low permeability glacial till with sand seams at various elevations within the till. The thicknesses of the sand seams are highly variable, but have not been observed to be more than 5 feet thick. The RI divided the Intermediate Unit into upper and lower till water-producing intervals for the purpose of determining groundwater flow, with upper and lower defined by wells screened above or below 695 feet above mean sea level (amsl). The upper till water-producing intervals potentiometric surface maps show groundwater flow paths from locally high water levels at the north and south portions of the Main Plant Site toward locally low water levels near the center of the Site. The lower till water producing intervals potentiometric surface maps show groundwater flow paths from locally high water levels at the north portion of the Main Plant Site toward locally low water levels near the center of the Site (and south) and to the northeast of the Site.

The sand seams appear to be interconnected at multiple levels within the till. The presence of the Intermediate Unit and its effect as a preferential pathway for groundwater flow

MKE\090360007 1-3


1-4 MKE\090360007

greatly diminishes the till’s effectiveness as an aquitard between the Shallow and Lower Units. The Intermediate Unit is semi-confined and appears to be in direct hydraulic communication with the overlying Shallow Outwash Unit.

Downward hydraulic head differentials between the Shallow and Intermediate Units and Intermediate and Lower Units of up to 5.22 and 12.2 feet, respectively, were reported in the RI (Weston, 2006).

The Lower Unit. This unit is a leaky confined aquifer (or possibly a series of confined aquifers) and is subdivided into two water-bearing zones under the conceptual hydrostratigraphic model of the site. The model existed prior to this work. Deeper water-bearing zones were encountered during the completion of this work and will be described in further detail in Sections 3 and 4. The two previously encountered water-bearing zones consist of the following:

• D Zone—The advance outwash immediately underlying the Wisconsonian Till and ranging up to 10 feet thick, but typically about 2 to 4 feet thick. The D Zone is under confined conditions, with previous reports noting an average potentiometric level of 703.3 feet amsl.

• D2 Zone—The 21 to 39 feet of the deeper strata immediately underlying the advance outwash layer at the top of the unit (D Zone) that are finer grained and more gradational. The D2 Zone is under confined conditions with previous reports noting a typical potentiometric level of 703.3 feet amsl, which is similar to that of the D Zone and suggests hydraulic communication.

Potentiometric surface maps included in the RI for the D Zone indicated that the primary flow directions were to the northeast in the northern portion of the Site and to the southeast in the southern portion of the Site. These potentiometric surface maps included in the RI show several groundwater divides that intersect with each other in the vicinity of the Site.

The D and D2 Zones appear to be separated at some locations by silt and clay lenses, but the thickness and extent of such lenses is not known. The lenses potentially serve as localized aquitards; however, the two zones appear to be hydraulically connected where the lenses are absent.

2. Activities

Drilling activities for installing the eight sentry monitoring wells began on November 28, 2006, and concluded on February 22, 2007. CH2M HILL supervised drilling activities conducted by Prosonic Drilling, Inc. (Prosonic), of Fenton, Michigan, which was acquired by Boart Longyear-Environmental & Infrastructure Drilling Services (Boart Longyear) during the project. Prosonic subcontracted the dual rotary drilling to Kelley Dewatering, Inc. (Kelley), of Wyoming, Michigan. The sentry wells were installed at the locations shown in Figure 1.

2.1 Isolation Casing and Sentry Monitoring Well Installation Rotosonic and dual-rotary drilling techniques were used to install eight sentry monitoring wells in either three or four stages at each well location, depending on the subsurface conditions observed by the CH2M HILL geologist. Continuous soil cores were collected for lithologic characterization and field screening by the CH2M HILL geologist. Vertical aquifer sampling (VAS) was performed every 10 feet in water-bearing formations with sufficient groundwater recharge. At the completion of each stage, an appropriately sized isolation casing was installed. A monitoring well was constructed in each borehole after the final stage of the pilot hole was completed.

A more detailed description of the installation of the isolation casings and sentry monitoring wells, as well as a description of deviations from the work plan, the soil boring logs, and monitoring well construction details are included in Appendix A.

2.2 Vertical Aquifer Sampling VAS was conducted while advancing the pilot hole. Overall, 30 groundwater samples were collected at 10-foot intervals within the Intermediate and Lower Units in water-bearing zones, which yielded sufficient amounts of water for sample collection as determined by the CH2M HILL geologist. Sample locations and depths are summarized in Table 1.

Prior to collecting a groundwater sample, the volume of potable water introduced to the formation during the previous 10-foot pilot hole advancement was removed by purging. Field water quality parameters (conductivity, temperature, pH, dissolved oxygen, oxidation reduction potential, and turbidity) were recorded prior to sample collection.

The VAS samples were analyzed for volatile organic compounds (VOC), semivolatile organic compounds (SVOC), pesticides, PBB/HBB, mercury, cyanide, Target Analyte List (TAL) metals, and pCBSA. Sample analyses were completed by PEL Laboratories of Tampa, Florida, for all parameters except pCBSA and Severn Trent Laboratories of Sacramento, California, for pCBSA.

MKE\090360007 2-1


2-2 MKE\090360007

2.3 Quarterly Groundwater Sampling Quarterly groundwater sampling was completed by CH2M HILL personnel in February 2007. Groundwater samples were collected from the city wells, sentry wells, MW-30I, and MW-30D. The groundwater samples were collected using low flow sampling techniques. Groundwater collected from each well was purged at a rate of less than 0.5 liters per minute using a bladder pump for the sentry wells, a peristaltic pump for MW-30I and MW-30D, and clean, disposable, down-hole tubing. The city well samples were collected by allowing groundwater to purge from the sample collection line for approximately 10 minutes prior to sample collection.

Field groundwater quality parameters (including pH, specific conductance, turbidity, temperature, dissolved oxygen, and oxidation reduction potential) were measured during the purging process. Field groundwater quality parameters were not monitored for the city well samples.

The city well and sentry well samples were analyzed for VOCs, SVOCs, pesticides, PBB/HBB, mercury, cyanide, TAL metals, and pCBSA. The groundwater samples collected from MW-30I and MW-30D were analyzed for pCBSA only. Sample analyses were completed by PEL Laboratories of Tampa, Florida, for all parameters except pCBSA and Severn Trent Laboratories of Sacramento, California, for pCBSA.

2.4 Hydraulic Conductivity Testing (Slug Tests) Rising head slug tests were performed at each sentry well between March 26 and March 28, 2007. The rising head slug tests were accomplished by lowering the head of water in each sentry well and monitoring the recovery of the groundwater elevation to the static water level. The water level was lowered by the use of an air displacement device. The recovery of the groundwater was measured with an In Situ PXD-261 pressure transducer and recorded with a Hermit 3000 data logger. The procedure for running the slug tests is included in Appendix B.

The slug test data was analyzed using AQTESOLV® for Windows Version 3.50 Professional (HydroSOLVE, Inc., 2003). Hydraulic conductivity solutions were completed using both the Bower-Rice and Hvorslev Methods. The results for individual slug test replicates are included in Appendix B. The hydraulic conductivity results for individual slug test replicates, mean values for the replicates completed at each sentry well, mean values for all slug tests, and mean values for the wells completed in the Lower Unit are summarized in Table 2.

3. Results

The following subsections detail the findings of the field activities.

3.1 Geology Information previously presented for the Shallow Unit, the Intermediate Unit, and the Lower Unit was largely confirmed during the sentry well installation. New data regarding the Lower Unit is presented here and discussed in more detail in Section 4.

Based on the screened intervals and driller’s logs of the city wells, it appeared that two city well intake zones existed within the Lower Unit in the study area. This observation was confirmed by coarse-grained deposits that were encountered coinciding with the screened intervals of the city water supply wells. These granular deposits correlate with the Upper and Lower City Well Intake Zones (CWIZ).

The Upper CWIZ consists of fine to coarse sand, with gravel noted at MSW-6 and MSW-7. The elevation of the top of the Upper CWIZ ranged between approximately 590 and 625 feet amsl. The bottom of the Upper CWIZ was encountered at locations MSW-5, MSW-8, and MW-36D4, and the elevation of the bottom of the Upper CWIZ ranged between 570 to 595 feet amsl.

The Upper CWIZ is underlain by a cohesive unit of very stiff to hard gray to grayish brown clay or very stiff to hard gray silt (till) approximately 10 to 40 feet thick. The bottom of this cohesive unit was encountered at locations MSW-5, MSW-8, MW-36D4, and MW-38D4. The cohesive unit at MSW-5, MW-36D4, and MW-38D4 consisted of stiff moist silt, rather than the hard and dry till. This fact is significant and will be discussed in more detail in Section 4.

The Lower CWIZ consists of brown, fine to coarse sand with some fine gravel. The elevation of the top of the Lower CWIZ was found to range between approximately 540 and 550 feet amsl. The bottom of the Lower CWIZ was encountered at locations MSW-5 and MSW-8 at approximately 520 feet amsl. The soil boring at MW-31D4 was completed to approximately 465 feet amsl, and the Lower CWIZ was not encountered.

The nomenclature for the water-bearing zones in the Lower Unit was extrapolated from that established in the Source Migration Investigation Report (CH2M HILL, 2005). The monitoring well nomenclature designates the water-bearing zones in the Lower Unit with a “D,” followed by a number that generally corresponds to the order, from ground surface, in which the different zones are encountered. Following that nomenclature, the Upper CWIZ would be designated as the D3 Zone and the Lower CWIZ as the D4 Zone. The designations are part of the well numbering system, but will not be used for the balance of this discussion

MKE\090360007 3-1


because the fact that these wells are screened in the same units as the city water supply wells is more illustrative of their monitoring significance than the D3 and D4 designations.1

The information gathered during the completion of the sentry wells was used in conjunction with existing subsurface data to generate three new cross sections for the area. The cross section lines are located as shown on the Cross Section Location Map in Figure 2. A legend for the cross sections is provided in Figure 3, and the cross sections are shown in Figures 4 through 6.

3.2 Hydrogeology The hydraulic conductivity testing results and the hydrogeologic conditions observed in the study area during field work are described in this subsection.

3.2.1 Hydraulic Conductivity Testing Results The hydraulic conductivity values were calculated using both the Bower-Rice and Hvorslev Methods, with the two methods showing reasonable agreement. Hydraulic conductivity values were also calculated using the Cooper-Papadopulos-Bredehoeft (CPB) method. One of the input parameters for the CPB method is the thickness of the aquifer being tested, which was estimated using the cross sections. The hydraulic conductivity results from the CPB Method did not differ significantly from the Bower-Rice and Hvorslev Methods, and because the CPB results are based on estimated aquifer thickness values, the results are not presented in this report. This section presents the results of the Bower-Rice Solution Method.

The overall mean for all slug tests was 2.94 feet/day and ranged from 0.51 to 6.23 feet/day for all replicates. The mean hydraulic conductivity for wells completed in the Upper CWIZ was 3.28 feet/day and ranged between 0.79 and 6.23 feet/day for the replicates within this zone. The mean hydraulic conductivity for wells completed in the Lower CWIZ was 2.43 feet/day and ranged between 0.51 and 5.56 feet/day for replicates within this zone.

3.2.2 Groundwater Elevations and Potentiometric Surface Maps Groundwater elevations were recorded in February and April 2007, and are shown in Table 3. The groundwater elevations for the sentry monitoring wells are similar and cross sections derived from the sentry well boring logs indicated that the Upper and Lower CWIZ exhibit a high degree of stratigraphic connection; consequently, a high degree of hydraulic interconnection and hydraulic head equilibration is anticipated. Therefore, the potentiometric surface maps for February and April 2007 (Figures 7 and 8) were generated using groundwater elevations from sentry wells set in both the Upper and Lower CWIZ, and represent overall groundwater flow within these zones of the Lower Unit. The figures indicate that groundwater within the Lower Unit generally flows to the northeast.

1 Field conditions dictated that MSW-31D4 and MSW-38D4 be installed in a zone correlating to the Upper CWIZ. The Lower CWIZ is not present at MSW-31D4; therefore, the sentry well was installed in the Upper CWIZ. Low permeability units were encountered in the subsurface at MSW-38D4 that required installation of an isolation casing prior to reaching the Lower CWIZ.

3-2 MKE\090360007

3. RESULTS

3.2.3 Groundwater Velocity and Time of Travel Calculations Groundwater velocity was calculated for February and April 2007 using the potentiometric surface maps (Figures 7 and 8) and a modified form of Darcy’s Law, which states the following:

V = Ki/ne

Where:

V = Groundwater velocity (feet/day) K = Hydraulic conductivity (feet/day) I = Groundwater flow gradient (feet/feet) ne = Effective porosity (assumed to be 0.3)

Groundwater flow gradient was determined along the flow paths shown in Figures 7 and 8. For velocity calculations, the mean overall hydraulic conductivity value (2.94 feet/day) was used, and an effective porosity of 0.3 was selected as representative. The groundwater flow velocity was approximately 0.012 to 0.025 feet/day and 0.009 to 0.013 feet/day in February and April 2007, respectively. The results of velocity calculations are shown in Table 4.

The parameters for time of travel calculation are groundwater velocity (using groundwater flow gradient, hydraulic conductivity, and effective porosity) and distance. Distance, once determined, is not a variable part of the calculation. The uncertainty associated with some of the hydrogeologic parameters is presented below.

• Hydraulic Conductivity—The mean hydraulic conductivity values derived from the slug test data test range between 0.51 to 6.23 feet/day (1.8 × 10-4 to 2.2 × 10-3 centimeters/second). These hydraulic conductivity values are in agreement with published values (Fetter 1998) for fine sands (10-5 to 10-3 centimeters/second). The slug test results are an indication of the distribution of hydraulic conductivity for a given area and individual tests represent the hydraulic conductivity in the immediate area of the well for which they were performed. The slug tests were performed at eight locations inside an area of approximately 210 acres. Given that the hydraulic conductivities in the study area are in agreement with published values, they are assumed valid, and are used as qualified.

• Groundwater Flow Gradient—The slope of the potentiometric surface and the term represents the potential energy that the slope contributes to flowing groundwater. The gradient term is determined from potentiometric surface maps by assigning a groundwater flow path (perpendicular to individual equipotential lines) and then dividing the elevation difference of the selected equipotential lines (Δh from Table 2) by the horizontal distance (Δl from Table 2) between the two. Due to the manner in which it is determined, the horizontal gradient is dependent on the position of the equipotential lines. The position of the equipotential lines is in turn controlled by the interpretation of the groundwater elevations, and the number and position of the observation points (wells). Figures 7 and 8 show that the sentry monitoring wells provide adequate control of the groundwater elevations in the Lower Unit in the north to south direction, but the well positions do not cover as much area east to west.

• Groundwater Flow Gradient Distribution—Gradient values calculated as described above provide a sense, or an overall estimate, of what the gradient actually does in the

MKE\090360007 3-3


area in which it was measured. Groundwater flow gradients are steepened (increased) in areas close to municipal well pumping in response to groundwater withdrawals. Therefore, the groundwater flow gradients determined in the portions of CWIZ represented by the sentry wells may underestimate the gradients encountered closer to the city wells. Also, determinations of horizontal gradients in a particular area are always scale dependent. If the scale of the determination were smaller, a more detailed interpretation of the horizontal gradient would result, but it would be relevant over a much smaller area. Groundwater flow gradient likely imposes the most uncertainty in the time of travel (TOT) calculation, possibly by a factor of 10, due to municipal groundwater withdrawals and scale dependencies.

TOT calculations were completed for the sentry well/city well pair using this hydrogeologic data. In this calculation, the individual sentry well hydraulic conductivity values were used, with a gradient of 0.002 feet/feet. Additionally, straight line distances between the sentry well and city well were used as the travel distance, rather than distance along the groundwater flow path, as the straight line distance yields more conservative (shorter) TOT estimates. Calculated in this manner, the TOT ranges from approximately 47 years for CW-4/MW-38D4 to approximately 474 years for CW-7/MSW-7 as shown in Table 5. The solution for the TOT calculations is based on the data and standard methods and assumptions for this type of calculation. The complexity of the geologic and hydrogeologic environment can affect the results obtained from these calculations. These results are discussed in greater detail in Section 4.

3.3 Laboratory Results The VAS samples and quarterly groundwater samples were analyzed for VOCs, SVOCs, pesticides, PBB/HBB, mercury, cyanide, TAL metals, and pCBSA. Sample analyses were completed by PEL Laboratories of Tampa, Florida for all parameters except pCBSA, and Severn Trent Laboratories of Sacramento, California for pCBSA only. Field water quality parameters (conductivity, temperature, pH, dissolved oxygen, oxidation reduction potential, and turbidity) were recorded prior to sample collection. Groundwater quality parameters with sample locations, depths, and designations for the VAS are summarized in Table 6. The temperature probe was malfunctioning during the February (quarterly) sampling event, which caused the absolute values of temperature dependent groundwater quality parameters to be inaccurate, but their relative values were used to determine when well stabilization occurred. These values are not included in this report.

CH2M HILL performed a data quality evaluation on the laboratory analytical data. The Data Quality Evaluation Reports for the VAS samples and the February quarterly sampling are included in Appendix C.

The analytical results were compared to U.S. Environmental Protection Agency Maximum Contaminant Levels (MCLs). National Secondary Drinking Water Standards, commonly referred to as secondary maximum contaminant levels (SMCLs), are non-enforceable guidelines regulating contaminants that may cause cosmetic or aesthetic effects, such as offensive taste, odor, color or staining. SMCLs were not considered when comparing the detected parameters to MCLs.

3-4 MKE\090360007

3. RESULTS

3.3.1 VAS Sampling Results During the installation of the sentry monitoring wells, 30 VAS samples and 3 duplicate samples were collected. A summary of the analytical results is included in Table 7. The following text summarizes the comparison of detected parameters to the MCLs by location.

MSW-5 VAS samples were collected from depth intervals 42–47 feet bgs, 118–128 feet bgs, 128–132 feet bgs, and 177–187 feet bgs.

Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. The following VOCs were detected in the VAS samples at MSW-5. The parameters with MCL values were detected at concentrations below the respective MCL.

MSW-5 VAS Sample Depth

Parameter (Concentration [μg/L])

42–47 feet bgs Benzene (0.16J μg/L), toluene (0.37J μg/L)

118–128 feet bgs Acetone (8.1J μg/L), benzene (0.3J μg/L), toluene (0.78J μg/L)

128–132 feet bgs Acetone (6.3J μg/L), benzene (0.27J μg/L), dimethyl benzene( 1.1J μg/L), toluene (2 μg/L)

177–187 feet bgs 1,2-Dichlorobenzene (0.76J μg/L), 1,4-dichlorobenzene (0.59J μg/L), carbon disulfide (0.51J μg/L), toluene (0.86J μg/L)

pCBSA was detected in the VAS samples collected from 118–128 feet bgs (4.4 μg/L), 128-132 feet bgs (5.5 μg/L), and 177–187 feet bgs (4.2 μg/L).

The following inorganics exceeded the MCLs at one or more of the sample depths: arsenic, barium, beryllium, chromium, and lead.

MSW-6 VAS samples were collected from depth intervals 26–26.5 feet bgs and 58–60 feet bgs.

Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. VOCs were not detected in the 26–26.5 feet bgs VAS sample. Acetone (15.2 μg/L), benzene (0.16J μg/L), carbon disulfide (0.67J μg/L), and toluene (0.46J μg/L) were detected in the 58–60 feet bgs VAS sample. The parameters with MCL values were detected at concentrations below the respective MCL.

pCBSA was detected in the VAS samples at 390 μg/L and 120 μg/L, respectively.

Arsenic exceeded the MCL in the VAS sample collected from 26.0–26.5 feet bgs (10.2 μg/L). Arsenic (17.9 μg/L), chromium (112 μg/L), and lead (24.7 μg/L) exceeded the MCLs in the VAS sample collected from 58–60 feet bgs.

MSW-7 VAS samples were collected from depth intervals 37–41 feet bgs and 88–91 feet bgs.

MKE\090360007 3-5


Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. Carbon disulfide (0.96J μg/L) was detected in the 37–41 feet bgs VAS sample. Toluene (0.7J μg/L) was detected in the 88–91 feet bgs VAS sample. The toluene concentration is below the MCL.

pCBSA was detected in both VAS samples at 95 μg/L and 1.1 μg/L, respectively.

Arsenic (10.5 μg/L) and lead (16.5 μg/L) exceeded the MCLs in the 88–91 feet bgs VAS sample.

MSW-8 VAS samples were collected from depth intervals 29–37 feet bgs, 80–82 feet bgs, and 147-149 feet bgs.

Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. VOCs were not detected in the 29–37 feet bgs and the 147–149 feet VAS samples. Acetone (9.3J μg/L), benzene (0.31J μg/L), and toluene (0.66J μg/L) were detected in the 80–82 feet bgs VAS sample. The parameters with MCL values were detected at concentrations below the respective MCL.

pCBSA was detected in the VAS samples collected from 80–82 feet bgs (26 μg/L) and 147-149 feet bgs (2.8 μg/L).

The following inorganics exceeded the MCLs at one or more of the sample depths: arsenic, barium, beryllium, chromium, lead, and thallium.

MW-31D4 VAS samples were collected from depth intervals 10–11 feet bgs, 42–47 feet bgs, 61–68 feet bgs, 88–98 feet bgs, 98–108 feet bgs, 108–118 feet bgs, 136–146 feet bgs, 146–156 feet bgs, and 156–166 feet bgs.

Pesticides, HBB, and SVOCs were not detected in the VAS samples. PBB was detected in the VAS sample 108–118 feet bgs (0.02J μg/L). VOCs were not detected in the 10–11 feet bgs and the 42–47 feet bgs VAS samples. The following VOCs were detected in the VAS samples at MW-31D4:

MW-31D4 VAS Sample Depth


61–68 feet bgs Acetone (6.6J μg/L)

88–98 feet bgs Carbon Disulfide (2.2J μg/L), toluene (0.84J μg/L)

98–108 feet bgs Benzene (0.22J μg/L), carbon disulfide (4.9 μg/L), dimethyl benzene (1.1J μg/L), toluene (1.1 μg/L)

108–118 feet bgs Benzene (0.22J μg/L), dimethyl benzene (0.84 μg/L), toluene (1.1 μg/L)

136–146 feet bgs Toluene (1.8 μg/L)

146–156 feet bgs 1,2-Dichloroethylene (0.64J μg/L), carbon disulfide (0.73J μg/L), toluene (4.1 μg/L), vinyl chloride (1.7J μg/L)


3-6 MKE\090360007

3. RESULTS



61–68 feet bgs Acetone (6.6J μg/L)

88–98 feet bgs Carbon Disulfide (2.2J μg/L), toluene (0.84J μg/L)

98–108 feet bgs Benzene (0.22J μg/L), carbon disulfide (4.9 μg/L), dimethyl benzene (1.1J μg/L), toluene (1.1 μg/L)

The parameters with MCLs values were detected at concentrations below the respective MCL.

pCBSA was detected in all of the VAS samples collected at concentrations ranging from 1.2 μg/L to 32 μg/L.

The following inorganics exceeded the MCLs at one or more of the sample depths: chromium, lead, selenium, and thallium.

MW-35D3 VAS samples were collected from depth intervals 14.5–17 feet bgs and 78–88 feet bgs.

Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. Carbon disulfide (0.46J μg/L) was detected in the 14.5–17 VAS sample. Carbon disulfide (0.53J μg/L) and toluene (0.47J μg/L) were detected in the 78–80 feet bgs VAS sample. The parameters with MCL values were detected at concentrations below the respective MCL.

pCBSA was detected in the 78–88 feet bgs VAS sample (5.4 μg/L).

The following inorganics exceeded the MCLs at one or more of the sample depths: arsenic, beryllium, chromium, copper, and lead.

MW-36D4 VAS samples were collected from depth intervals 78–88 feet bgs, 157–167 feet bgs, 177–187 feet bgs.

Pesticides, PBB, HBB, and SVOCs were not detected in the VAS samples. The following VOCs were detected in the VAS samples at MW-36D4



78–88 feet bgs Benzene (0.2J μg/L), carbon disulfide (0.46J μg/L), dimethyl benzene (0.57J μg/L), toluene (0.91J μg/L)

157–167 feet bgs Carbon disulfide (1.2J μg/L)

177–187 feet bgs Toluene (0.5J μg/L)

MKE\090360007 3-7


The parameters with MCL values were detected at concentrations below the respective MCL.

pCBSA was detected in all of the VAS samples collected at concentrations ranging from 0.54 μg/L to 74 μg/L.

Arsenic exceeded the MCL in the VAS samples collected from 78–88 feet bgs (19.9J μg/L) and 157–167 (11.6 μg/L). Chromium exceeded the MCL in the VAS sample collected from 177–187 feet bgs (106 μg/L).

MW-38D4 VAS samples were collected from depth intervals 27–31 feet bgs, 112–117 feet bgs, 117-127 feet bgs, 127–133 feet bgs, and 147–157 feet bgs.

Pesticides, PBB, and HBB were not detected in the VAS samples. Di-N-butyl phthalate was detected in VAS samples 112–117 feet bgs (9.4 μg/L) and 117–127 feet bgs (4.3 μg/L). The following VOCs were detected in the VAS samples at MW-38D4:



27–31 feet bgs Benzene (0.24J μg/L), carbon disulfide (1.3J μg/L), toluene (0.88J μg/L)



127–133 feet bgs Benzene (0.26J μg/L), toluene (8.6 μg/L)


The parameters with MCL values were detected at concentrations below the respective MCL.

pCBSA was detected in all of the VAS samples collected at MW-38D4, with concentrations of 420,000 μg/L, 2.3μg/L, 7.2μg/L, 6.3μg/L, and 4.7μg/L, respectively.

The following inorganics exceeded the MCLs at one or more of the sample depths: arsenic, beryllium, cadmium, chromium, lead, selenium, and thallium.

3.3.2 Quarterly Groundwater Sampling The six city wells and eight sentry monitoring wells were sampled during the February 2007 quarterly sampling event. The samples were analyzed for the same parameters as the VAS sampling, and the analytical results were compared to the MCLs. Additionally, MW-30I and MW-30D were sampled and analyzed for pCBSA. Table 8 summarizes the analytical data for all sample locations. The following text summarizes the results by location.

MSW-5 Pesticides, PBB, HBB, SVOCs, and pCBSA were not detected in the groundwater samples. Methyl acetate (3.7 μg/L) and toluene (0.9J μg/L) were detected in the groundwater

3-8 MKE\090360007

3. RESULTS

samples. The parameters with MCL values were detected at concentrations below the respective MCL.

MSW-6 Pesticides, PBB, HBB, VOCs, SVOCs, and pCBSA were not detected in the groundwater samples.

MSW-7 PBB, HBB, VOCs, SVOCs, and pCBSA were not detected in the groundwater sample. 2,4’-Dichlorodiphenyldichloroethene (2,4’-DDE) (0.0016J μg/L), 2,4’-DDT (0.002J μg/L), and 4,4’-DDT (0.0026J μg/L) were detected in the groundwater sample.

MSW-8 Pesticides, PBB, and HBB were not detected in the groundwater sample. Toluene (0.62J μg/L), bis(2-ethylhexyl) phthalate (4.8J μg/L), and pCBSA (0.15J μg/L) were detected in the groundwater samples.

MW-31D4 Pesticides, PBB, HBB, and SVOCs were not detected in the groundwater samples. Methyl acetate (4.6 μg/L) and pCBSA (4.4 μg/L) were detected in the groundwater sample.

MW-35D3 Pesticides, PBB, HBB, VOCs, and SVOCs were not detected in the groundwater sample. pCBSA (0.8J μg/L) was detected in the groundwater sample.

MW-36D4 Pesticides, PBB, HBB, and SVOCs were not detected in the groundwater samples. Toluene (0.61 μg/L) and pCBSA (0.52J μg/L) were detected in the groundwater sample.

MW-38D4 Pesticides, PBB, HBB, and SVOCs were not detected in the groundwater sample. Acetone (8.3J μg/L), toluene (0.33J μg/L), and pCBSA (59J μg/L) were detected in the groundwater sample.

MW-30I and MW-30D pCBSA was detected at MW-30I and MW-30D at 300,000 μg/L and 140 μg/L, respectively.

City Wells Pesticides, PBB, HBB, VOCs, and SVOCs were not detected in the city well samples.

pCBSA was not detected in CW-1 and CW-8. pCBSA was detected at CW-4 (280 μg/L), CW-5 (0.83J* μg/L), CW-6 (3 μg/L), and CW-7 (5.3 μg/L).

MKE\090360007 3-9


3.3.3 Comparison to Michigan Part 201 Residential and Commercial I Drinking Water Criteria

The analytical results of the quarterly groundwater sampling and the VAS samples were compared to the Michigan Part 201 Residential and Commercial I Drinking Water Criteria. Tables 7 and 8 and the following text summarize the comparison to Part 201 by sampling event and location.

VAS Samples VOCs, SVOCs, pesticides, PBB, and HBB did not exceed the Michigan Part 201 Residential and Commercial I Drinking Water Criteria in any of the VAS samples. The following inorganics and pCBSA exceedances of the Michigan Part 201 Residential and Commercial I Drinking Water Criteria were noted in the VAS samples.

MSW-5 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, barium, beryllium, cobalt, iron, lead, manganese, nickel, and vanadium.

MSW-6 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, iron, lead, manganese, sodium, vanadium, and zinc.

MSW-7 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, iron, lead, manganese, and vanadium.

MSW-8 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, barium, beryllium, cobalt, iron, lead, magnesium, manganese, nickel, thallium, vanadium, and zinc.

MW-31D4 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, iron, lead, manganese, and vanadium.

MW-35D3 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, beryllium, cobalt, copper, iron, lead, manganese, nickel, and vanadium.

MW-36D4 The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, iron, lead, manganese, and vanadium.

3-10 MKE\090360007

3. RESULTS

MKE\090360007 3-11

MW-38D4 pCBSA was detected in all of the VAS samples collected at concentrations ranging from 2.3 μg/L to 420,000 μg/L, with the sample collected at 27 to 31 feet bgs exceeding the Part 201 Residential and Commercial I Drinking Water Criteria.

The following inorganics exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at one or more VAS sample depths: aluminum, arsenic, beryllium, cadmium, cobalt, iron, lead, magnesium, manganese, nickel, selenium, sodium, thallium, vanadium, and zinc.

3.3.4 Quarterly Groundwater Samples VOCs, SVOCs, pesticides, PBB, HBB, did not exceed the Part 201 Residential and Commercial I Drinking Water Criteria at any of the sample locations. The following inorganics and pCBSA exceedances of the Michigan Part 201 Residential and Commercial I Drinking Water Criteria were noted.

MSW-5, MW-31D4, MW-35D3 Aluminum, iron, and manganese exceeded the Part 201 Residential and Commercial I Drinking Water Criteria. No other exceedances were noted.

MSW-6 and MSW-7 Aluminum, iron, lead, manganese, and vanadium exceeded the Part 201 Residential and Commercial I Drinking Water Criteria. No other exceedances were noted.

MSW-8, MW-36D4, and MSW-38D4 Aluminum, iron, lead, and manganese exceeded the Part 201 Residential and Commercial I Drinking Water Criteria. No other exceedances were noted.

MW-30I and MW-30D pCBSA exceeded the Part 201 Residential and Commercial I Drinking Water Criteria at MW-30I.

City Wells Iron and manganese exceeded the aesthetic Part 201 Residential and Commercial I Drinking Water Criteria at all of the city wells with the exception of CW-8 (iron only). Iron and manganese concentrations were below the health-based criteria listed in Footnote E to MDEQ Part 201 Remediation and Redevelopment Division Operation Memorandum No. 1 for iron (2,000 μg/L) and manganese (860 μg/L) with the exception of iron at CW-4 (2,050 μg/L).

4. Discussion

4.1 Geology The subsurface has previously been subdivided into three hydrogeological units: The Shallow Unit, the Intermediate Unit, and the Lower Unit. The work effort associated with the sentry wells yielded new information regarding the geology and hydrogeology of the Lower Unit.

The Lower Unit is a leaky confined aquifer that had previously been subdivided into two water-bearing zones: the D Zone, consisting of the deposits immediately underlying the Wisconsin Till, which can be up to 10 feet thick, but is typically about 2 to 4 feet thick, and the D2 Zone, consisting of the 21 to 39 feet variable sands immediately underlying the bottom of the D Zone. Figures 4, 5, and 6 show the following:

• The cross sections confirm that the D Zone and D2 Zone are not continuous across the study area, which is in agreement with previous descriptions of these two layers of the Lower Unit.

• The D2 Zone, where present, is underlain by approximately 10 to 20 feet of glacial till. In areas where the D2 Zone is thicker (MW-36D4 and MW-38D4) it is underlain by as little as 10 feet of moist till material.

• Geologic logs indicate that the Upper CWIZ and the Lower CWIZ are separated by a clay/silt till layer that has a variable thickness ranging between 10 and 40 feet. The thickness and competency of the unit were greater at MSW-5 and MSW-8, but moisture was noted at MSW-5.

• The till unit separating the Upper and Lower CWIZs is approximately 10 feet thick and moist at MW-36D4.

• The Lower CWIZ was not encountered at MW-31D4. This soil boring was completed to approximately 465 feet amsl, where a reddish brown clay unit was encountered. This formation is likely the underlying Saginaw Formation and is indicative of the variable nature of the glacial deposits present in the study area.

Based on this information, the two CWIZs appear to represent a continuation of a series of confined/semiconfined aquifers, with more significant sand deposits at depth. The Upper and Lower CWIZ, as well as the D Zone and D2 Zone, appear to be hydraulically connected as supported by the following findings:

• Reasonable potentiometric surface maps can be drawn utilizing wells with screens separated by more than 60 vertical feet that encompasses what appears to be a confining/semiconfining layer within the Lower Unit.

• A moist silt layer was found under the Upper CWIZ at MSW-5, MW-36D4, and MW-38D4. Although these layers would not produce sufficient water to collect

MKE\090360007 4-1


groundwater samples, it is still possible for groundwater from the Upper CWIZ to leak slowly into the Lower CWIZ at these locations, or vice-versa depending on hydraulic pressure differentials between the two zones.

• pCBSA is regularly detected at locations CW-1 and CW-4, which indicates a connection between the D Zone, D2 Zone, the Upper CWIZ, and the Lower CWIZ in proximity to CW-1 and CW-4.

• A previous aquifer performance test completed as a part of the remedial investigation (Remedial Investigation Report for Operable Unit One, Velsicol Chemical Corporation Superfund Site, St. Louis, Gratiot County, Michigan [Weston Solutions of Michigan, Inc., November 2006]) indicated that pumping groundwater from CW-7 induced a hydraulic response in at least one of the D Zone monitoring wells completed in the Lower Unit (WMW-16D22 in Penny Park). It was previously thought that CW-7 was screened in the D2 Zone. This effort indicates that the screen for CW-7 is in the Upper CWIZ. Figure 4 shows that the D2 Zone and the Upper CWIZ are separated by 30 feet of clay rich till at CW-7. The same relationship between the D2 Zone and the Upper CWIZ is present at MSW-7. The fact that pumping at CW-7 can induce an observable hydraulic response in WMW-16D2 given that the local separation of the two zones indicates that a hydraulic connection is likely present.

• pCBSA is detected at CW-6 and CW-7. Figure 5 shows that the screened intervals for both CW-6 and CW-7 are at least 30 feet below the closest occurrence of the D2 Zone, likely eliminating closely located portions of the D2 Zone as the pCBSA source. Therefore, the most likely source of this pCBSA is infiltration into the Upper CWIZ at a remote location (perhaps closer to the Main Plant Site, or perhaps a second source of pCBSA) followed by migration to the city wells in response to locally oversteepened hydraulic gradients induced by pumping.

• A search of MDEQ records of historical well logs indicated several deep production and test wells completed within the study area by Michigan Chemical Corporation, the City of St. Louis, and others. These wells ranged in depth between 144 feet bgs and 4,360 feet bgs, and several were completed on the Site. Information regarding the locations, depths, and installation and decommissioning dates of these wells is included in Appendix D.

4.2 Groundwater Quality Data The VAS samples collected at MW-38D4 contained several metals (aluminum, arsenic, beryllium, cadmium, chromium, iron, lead, manganese, selenium, thallium, vanadium, and zinc) at concentrations exceeding the MCLs. VAS samples collected at the other sampling locations frequently exceeded MCLs for iron and manganese. VAS groundwater samples are not comparable to monitoring well groundwater samples because they are collected from an extendable screen sampling device with natural collapse around the screened interval, and purged with a submersible pump, and do not have the benefit of a filter pack or well development. As a result, elevated turbidity readings were commonly encountered

2 Despite the D2 suffix, WMW-16D2 is completed in the D Zone.

4-2 MKE\090360007

4. DISCUSSION

or did not stabilize prior to sample collection. Additionally, none of the metals samples were field filtered. Therefore, the metals concentrations exceeding the MCLs in groundwater samples collected in this manner are likely naturally occurring or a result of high turbidity in the sample. Quarterly groundwater samples from the sentry wells showed iron, manganese, and aluminum concentrations that exceeded MCLs. These concentrations are likely due to the natural groundwater conditions. The entire set of city well samples showed iron and manganese concentrations that exceeded MCLs. Aluminum was not detected above the MCL in the city well samples. This is likely due to the fact that the city wells have experienced a much greater degree of pumping than the sentry wells, which has likely decreased the amount of natural turbidity and colloidal material in the vicinity of the city wells relative to the newly installed sentry wells.

The city well samples were collected from regularly operated wells, where sample turbidity was not an issue, and that are located across the entire study area. Trace metal concentrations in these wells did not exceed the MCLs. The trace metals exceedances noted for the VAS samples also occurred over the entire area, but sample turbidity was an issue (Table 6). It is likely that the high number of metals exceeding the MCLs in the VAS samples is the result of sample conditions resulting from the collection method. Additionally, high iron and manganese concentrations are common in Michigan groundwater and the concentrations noted may be the result of natural groundwater conditions.

pCBSA is highly soluble in groundwater and resistant to natural degradation, which make it very mobile in groundwater and a useful indicator of contaminant movement in groundwater. The VAS sample results indicate that at least one of the sampled intervals at each of the sentry well locations contained detectable concentrations of pCBSA. Sample results for the sentry wells indicate that the most significant detections of pCBSA occurred at MW-31D4 and MW-38D4. Both of these wells are located proximate to the Site and are both set in the Upper CWIZ. Recent pCBSA data for the city wells is summarized in Table 9. pCBSA has been detected at CW-1, CW-4, CW-5, CW-6, and CW-7. pCBSA is generally not detected at CW-8. Figures 9 and 10 are snapshots of three-dimensional Environmental Visualization Software (EVS) models that show plan and oblique views of the pCBSA plume at concentrations of 100 μg/L and 7,300 μg/L.

No VOCs were detected at MSW-6, MSW-7, and MW-35D3. Low concentrations (often J-qualified) of acetone, methyl acetate, and toluene were detected in MSW-5, MSW-8, MW-31D4, MW-36D4, and MW-38D4. The toluene detections were all J-qualified. Also, J-qualified detections of 2,4’-DDE; 2,4’-DDT; and 4,4’-DDT were detected at MSW-7. A J-qualified detection of bis(2-ethylhexyl) phthalate was reported at MSW-8.

4.3 Hydrogeology The potentiometric surface maps presented in this report represent groundwater elevations for both the Upper and Lower CWIZ (Figures 7 and 8). These potentiometric surface maps show that groundwater flow within the CWIZs is generally to the northeast, and indicate the following:

• CW-8 is located upgradient of the Site; therefore, contaminants from the Site are not likely to affect CW-8.

MKE\090360007 4-3


• CW-5 is located crossgradient of the Site; therefore, contaminants from the Site are not likely to affect CW-5.

• CW-1, CW-4, CW-6, and CW-7 are located hydraulically downgradient of the Site, enabling contaminants from the Site to travel to these wells.

TOT calculations between the nearest sentry monitoring well and the city wells (using only the groundwater velocity) indicates that the sentry wells will provide between 47 and 474 years of advance warning with respect to contaminant migration, depending on location. TOT calculations based entirely on groundwater velocity assume equilibrium conditions with a steady state flow in a homogeneous substrate. The conditions present in the study area do not meet these assumptions, so the TOTs must be qualified by the degree to which these assumptions are valid. The following text describes the nonequilibrium conditions present over the study area:

• The operation of the city wells influences the groundwater flow over the entire area. Due to the presence and pumping of the city wells, the study area is likely never at equilibrium and steady state groundwater flow is never reached. The operating schedule of the city wells is controlled by demand for municipal water resources and pump usage hours, which are in a constant state of flux. The operation of the city wells depresses the elevation of the potentiometric surface in the CWIZs. This causes the horizontal gradients within the radius of influence of each operating city well to increase. The “oversteepening” of the horizontal gradient will significantly increase the groundwater flow velocity; therefore shortening the TOT.

• It is apparent from the driller’s logs, soil boring logs, and cross sections that the subsurface in the study area is not homogeneous. The result of this heterogeneity adds further uncertainty to the calculations in that the porosity, the degree to which parts of the aquifer are confined, the role of local aquifer recharge, and the degree and nature of the hydraulic connections between the geologic units, will all exert an influence on groundwater flow direction and velocity, and therefore, affect TOT calculations.

The complexity of the geologic and hydrogeologic regime in the study area makes it difficult to make predictions with regard to contaminant migration. In the RI, it was stated that (emphasis added) “monitoring wells screened in the upper till unit (I Zone) generally appear to be in hydraulic communication with the shallow outwash unit (Shallow Unit), while monitoring wells screened in the lower till unit (Lower I Zone) generally appear to be in hydraulic communication with the lower outwash unit (Lower Unit) (Weston, 2006).” This study found that it is likely that the Upper and Lower CWIZs are hydraulically connected.

These conclusions seem to indicate that the subsurface in the study area consists of a series of water-bearing units, each of which is connected in some manner to the unit below it. The individual units (that is, Shallow Unit, Intermediate Unit, and Lower Unit) possess enough hydraulic and geologic distinction to allow categorization as individual units, but the successive series of interconnections indicates that there is a hydraulic connection from the top (the Shallow Unit) to the bottom (the Lower CWIZ).

These interconnections constitute the “preferential pathways” that have been used to explain the subsurface distribution of contaminants stemming from the Site. The degree of

4-4 MKE\090360007

4. DISCUSSION

MKE\090360007 4-5

these interconnections is not strong enough to alter the regional groundwater flow that each of the units exhibits, but is likely sufficient to transmit contaminants downward. The RI reported that pumping from several of the city wells induced effects in onsite monitoring wells, whereas this study revealed that potential areas of hydraulic connection between the Upper and Lower CWIZ exist at MSW-5, MW-36D4, and MW-38D4. Further complicating the hydrogeologic model is the fact that more of these pathways are likely to exist, and it is not possible to predict where they will occur or their number.

The presence of pCBSA in all of the water-bearing units, despite the presence of the till layers encountered, is evidence of the hydraulic communication throughout the entire sequence of water-bearing units, and well impacts. pCBSA data indicates that city well pCBSA concentrations and distances from the Site are directly related. CW-1 and CW-4 show higher pCBSA concentrations, while CW-6 and CW-7 show minimal pCBSA concentrations, with little or no impact shown at CW-5 and CW-8.

Despite the difficulties associated with contaminant migration prediction, the sentry wells are located between the Site and the city wells. The sentry wells are screened in units that correspond to Upper and Lower CWIZ, and continued sampling will provide additional information and likely advance warning with respect to contaminant concentration changes in the Lower Unit.

MKE\090360007 5-1

5. Conclusions

Based on the findings of the recent field activities, CH2M HILL concludes the following:

• Groundwater within the Lower Unit flows to the northeast. CW-1, CW-4, CW-6, and CW-7 are located downgradient of the Velsicol/Pine River site; therefore, site contaminants could potentially reach these city wells.

• Potentiometric surface maps indicate that CW-5 and CW-8 are located cross-gradient and upgradient of the site, respectively. Therefore, contamination from the site is less likely to reach these city wells.

• Low level detections of p-CBSA at CW-5 and CW-8 may be indicative of a different source of pCBSA in the environment (for example, Former State Road Dump Site and/or the Gratiot County Landfill).

• The Lower Unit is a series of confined/semi-confined units and this geologic configuration is likely present until the Saginaw Formation is encountered.

• Leaking silt layers within the Lower Unit combined with preferential pathways for downward contaminant migration (consistent with previous reports) are the likely reasons for the presence of p-CBSA in the Lower Unit.

• MSW-5, MSW-6, and MSW-7 are at appropriate locations to provide advance warning of contaminant migration toward CW-5, CW-6, and CW-7. If the groundwater quality is compromised at these locations, sufficient time will exist for a response.

• As stated in the second bullet, CW-8 is located upgradient of the Site and contaminants from the Site are unlikely to affect this well. MSW-8 is located in an upgradient position with respect to the Site, but hydraulically downgradient of CW-8. Therefore, MSW-8 does not provide advance warning of contaminant travel from the Site to CW-8.

Tables

TABLE 1Vertical Aquifer SamplesVelsicol Chemical/Pine River Site, OU1

Sentry Well Sample Interval(feet bgs)

MSW-5

42 - 47118 - 128128 - 132177 - 187

MSW-6 26 - 26.558 - 60

MSW-7 37 - 4188 - 91

MSW-829 - 3780 - 82

147 - 149

MW-35D3 14.5 - 1778 - 80

MW-31D4

10 - 1142 - 4761 - 6888 - 98

98 - 108108 - 118136 - 146146 - 156156 -166

MSW-36D478 - 88

157 - 167177 - 187

MSW-38D4

27 - 31112 - 117117 - 127127 - 133147 - 157

TABLE 2Hydraulic Conductivity ResultsVelsicol Chemical/Pine River Superfund Site, OU1

Sentry Well Slug Test # Bower- Rice Method Hvorslev MethodK (cm/sec) K (ft/day) K (cm/sec) K (ft/day)

MSW-5

#1 8.475E-04 2.40 9.626E-04 2.73#2 7.002E-04 1.98 7.018E-04 1.99#3 5.460E-04 1.55 5.782E-04 1.64#4 4.332E-04 1.23 5.758E-04 1.63

Mean 6.317E-04 1.79 7.046E-04 2.00

MSW-6

#1 1.624E-03 4.60 1.874E-03 5.31#2 1.125E-03 3.19 1.267E-03 3.59#3 1.171E-03 3.32 1.337E-03 3.79#4 1.187E-03 3.36 1.028E-03 2.91

Mean 1.277E-03 3.62 1.377E-03 3.90

MSW-7

#1 3.539E-04 1.00 6.001E-04 1.70#2 3.582E-04 1.02 5.451E-04 1.55#3 2.800E-04 0.79 4.261E-04 1.21#4 2.925E-04 0.83 5.123E-04 1.45

Mean 3.212E-04 0.91 5.209E-04 1.48

MSW-8

#1 1.963E-03 5.56 2.935E-03 8.32#2 1.785E-03 5.06 2.668E-03 7.56#3 1.643E-03 4.66 2.456E-03 6.96#4 1.649E-03 4.67 2.465E-03 6.99

Mean 1.760E-03 4.99 2.631E-03 7.46

MW-31D4

#1 1.392E-03 3.95 1.534E-03 4.35#2 1.277E-03 3.62 1.344E-03 3.81#3 1.072E-03 3.04 1.181E-03 3.35

Mean 1.247E-03 3.53 1.353E-03 3.84

MW-35D3

#1 1.060E-03 3.00 1.604E-03 4.55#2 9.428E-04 2.67 1.426E-03 4.04#3 9.369E-04 2.66 1.417E-03 4.02

Mean 9.799E-04 2.78 1.482E-03 4.20

MW-36D4

#1 1.885E-04 0.53 2.752E-04 0.78#2 1.805E-04 0.51 2.759E-04 0.78#3 1.846E-04 0.52 2.695E-04 0.76#4 1.835E-04 0.52 2.680E-04 0.76

Mean 1.843E-04 0.52 2.722E-04 0.77

MW-38D4

#1 2.197E-03 6.23 2.676E-03 7.59#2 1.963E-03 5.56 2.504E-03 7.10#3 2.022E-03 5.73 2.464E-03 6.98#5 1.594E-03 4.52 2.129E-03 6.03

Mean 1.944E-03 5.51 2.443E-03 6.93

Bower- Rice HvorslevK (cm/sec) K (ft/day) K (cm/sec) K (ft/day)

Overall Mean 1.038E-03 2.94 1.343E-03 3.81Mean-Upper CWIZ 1.158E-03 3.28 1.437E-03 4.07Mean-Lower CWIZ 8.587E-04 2.43 1.203E-03 3.41

TABLE 3Sentry Well Groundwater Elevation DataVelsicol Chemical/Pine River Superfund Site, OU1

Well Number Northing Easting

TOC Elevation (feet amsl)

Well Depth (feet)

Screen Length (feet)

Screen Top Elevation

(feet amsl)

Screen Tip Elevation

(feet amsl) Unit Screened

Groundwater Elevation (feet amsl)

2/26/2007 4/9/2007MSW-5 696197.25 13059234.2 721.75 214.80 30.0 536.95 506.95 Upper CWIZ 697.75 698.40MSW-6 697585.68 13059724.3 728.591 142.22 5.0 591.37 586.37 Upper CWIZ 698.08 697.95MSW-7 698553.72 13059102.2 726.981 132.50 15.0 609.48 594.48 Upper CWIZ 698.77 698.73MSW-8 693569.74 13058479.5 736.492 217.09 25.0 544.40 519.40 Lower CWIZ 702.26 700.80

MW-31D4 695898.51 13057859.5 730.369 168.58 5.0 566.79 561.79 Upper CWIZ 698.97 699.32MW-35D3 697966.72 13058087.9 726.667 146.42 15.0 595.25 580.25 Upper CWIZ 698.42 698.92

MSW-36D4 697949.64 13058929.4 737.951 235.02 30.0 532.93 502.93 Lower CWIZ 698.80 701.27MSW-38D4 696909.86 13058519.1 724.174 166.83 15.0 572.34 557.34 Upper CWIZ 698.81 698.57

Notes:Groundwater elevation in feet above mean sea levelamsl = above mean sea levelDTB = Depth to bottomTOC = Top of casingCWIZ = City Well Intake Zone

MKE\090360007 1

TABLE 4Groundwater Flow Velocity, February and April 2007

Velsicol Chemical/Pine River Superfund Site, OU1

February 2007

Flow Path Δh Δl

Hydraulic Gradient(foot/foot) (Δh/Δl)

Effective Porosity

Hydraulic Conductivity (ft/day)

Groundwater Flow Velocity (ft/day)

Groundwater Flow Velocity (ft/yr)

"A" 4.0 2030 0.00200.3 2.94

0.0193 7.05"B" 3.0 1470 0.0020 0.0095 3.48"C" 1.5 1540 0.0010 0.0095 3.48

April 2007

Flow Path Δh Δl

Hydraulic Gradient(foot/foot) (Δh/Δl)

Effective Porosity

Hydraulic Conductivity (ft/day)

Groundwater Flow Velocity (ft/day)

Groundwater Flow Velocity (ft/yr)

"A" 2.5 2450 0.00100.3 2.94

0.0100 3.65"B" 2.5 3150 0.0008 0.0066 2.40"C" 1.5 2240 0.0007 0.0066 2.40

NOTES:See Figures 7 and 8 for depiction of groundwater flow pathHydraulic conductivity is the mean value as determined from the March 2007 Slug Tests . ft/day = feet per day, ft/yr = feet per year

MKE\090360007 1

TABLE 5Time of Travel Calculations Velsicol Chemical/Pine River Superfund Site, OU1

From ToDistance

(ft)

Hydraulic Conductivity

(ft/day)Gradient

(ft/ft) Velocity (ft/day)Time to reach CW

(days)Time to reach CW

(years)MSW-6 CW-6 1,050 3.62 0.002 0.0241 43,508 119.2MSW-7 CW-7 1,050 0.91 0.002 0.0061 173,077 474.2MW-38D4 CW-1 735 5.51 0.002 0.0367 20,009 54.8MW-38D4 CW-4 630 5.51 0.002 0.0367 17,151 47.0

NOTES:1. Gradient value was determined from site groundwater elevations and selected as representative of the groundwater condition at the site.2. Distances are straight line measurements from the sentry well to the city well and do not consider groundwater flow direction.3. Hydraulic conductivity is the mean value as determined from the March 2007 Slug Tests at individual sentry wells. ft = feet, ft/day = feet per day

MKE\090360007 1

TABLE 6Groundwater Quality Parameters, Sample Locations, Depths, and DesignationsVelsicol Chemical/Pine River Superfund Site, OU1

Station ID Sample ID

Interval Matrix

Sample Date

MSW-36D4 07CV08-48

78 - 88 Water

1/4/2007

MSW-36D4 07CV08-85 157 - 167

Water 2/15/2007

MSW-36D4 07CV08-89 177 - 187

Water 2/16/2007

MSW-38D4 07CV08-01

27 - 31 Water

11/27/2006

MSW-38D4 07CV08-84 112 - 117

Water 2/15/2007

MSW-38D4 07CV08-87 117 - 127

Water 2/15/2007

MSW-38D4 07CV08-88 127 - 133

Water 2/15/2007

MSW-38D4 07CV08-90 147 - 157

Water 2/16/2007

MSW-5 07CV08-25

42 - 47 Water

11/30/2006

MSW-5

07CV08-52 118 - 128

Water 1/8/2007

MSW-5

07CV08-56 128 - 132

Water 1/9/2007

MSW-5

07CV08-80 177 - 187

Water 1/31/2007

MSW-6 07CV08-22

26 - 26.5 Water

11/29/2006

MSW-6 07CV08-51

58 - 60 Water

1/5/2007

MSW-7 07CV08-03

37 - 41 Water

11/28/2006

MSW-7 07CV08-57

88 - 91 Water

1/10/2007Units

pH SU 7.70 6.07 6.31 7.17 NA 6.87 6.87 6.41 7.54 7.97 7.02 7.38 NA NA 7.58 7.75Conductivity mS/cm 1.343 0.632 0.696 8.87 NA 1.023 1.023 0.950 0.960 0.685 0.715 0.770 NA NA 0.819 0.786ORP millivolts 198.2 335.1 346.6 186.7 NA 350.1 350.1 NA 189.6 201.8 202.4 223.2 NA NA 189.7 207.5Turbidity N.T.U. 664 84.9 265 >1000 NA >1000 >1000 >1000 >1000 >1000 376 >1000 N A NA 740 >1000Temperature Celcius 13.30 NA NA 18.63 NA 8.85 8.85 8.55 18.00 8.57 9.21 7.38 NA NA 18.39 9.40DO mg/L NA NA NA 7.81 NA NA NA NA 16.54 NA NA NA NA NA 19.87 NA

Station ID Sample ID

Interval Matrix

Sample Date

MSW-8 07CV08-30

29 - 37 Water

12/5/2006

MSW-8 07CV08-46

80 - 82 Water

1/3/2007

MSW-8 07CV08-83

147-149 Water

2/6/2007

MW-31D4 07CV08-27

10 - 11 Water

12/4/2006

MW-31D4 07CV08-29

42 - 47 Water

12/4/2006

MW-31D4 07CV08-45

61 - 68 Water

12/21/2006

MW-31D4 07CV08-58

88 - 98 Water

1/11/2007

MW-31D4

07CV08-59 98 - 108 Water

1/11/2007

MW-31D4 07CV08-60 108 - 118

Water 1/11/2007

MW-31D4 07CV08-76 136 - 146

Water 1/25/2007

MW-31D4

07CV08-77 146 - 156

Water 1/25/2007

MW-31D4

07CV08-78 156 - 166

Water 1/25/2007

MW-35D3 07CV08-23

14.5 - 17 Water

11/29/2006

MW-35D3 07CV08-62

78 - 80 Water

1/15/2007Units

pH SU 7.73 7.86 N A 6.56 7.77 7.24 7.43 7.93 7.53 7.03 7.48 7.66 NA NAConductivity ms/cm 0.607 0.763 NA 0.595 0.81 4.111 2.748 0.866 2.632 1.149 0.907 0.840 NA NAORP millivolts 199.6 191.3 NA 193.7 193.7 198.5 198.5 197.1 196.6 270.6 202.7 208.2 NA NATurbidity N.T.U. 25 >1000 NA >1000 >1000 12.7 39.4 36.1 309 201 >1000 >1000 NA NATemperature Celcius 10.33 12.15 NA 10.28 10.7 12.83 12.43 13.98 15.37 8.86 8.41 8.47 NA NADO mg/L NA NA NA NA NA NA 4.92 11.9 4.09 NA NA NA NA NA

Notes: DO = dissolved oxygen, mg/L = milligrams per liter, mS/cm = milliSiemens per centimeter, N.T.U = nephelometric turbidity units, ORP = oxidation reduction potential, SU = standard units

MKE\090360007 1

TABLE 7Vertical Aquifer SamplingAnalytical ResultsNovember 28, 2006 - February 16, 2007Velsicol Chemical/Pine River Superfund Site, OU1

Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

MSW-5 07CV08-25 42 - 47

Water 11/30/2006

MSW-5 07CV08-52 118 - 128

Water 1/8/2007

MSW-5 07CV08-56 128 - 132

Water 1/9/2007

MSW-5 07CV08-80

177 - 187 Water 1/31/2007

MSW-5 07CV08-81 177 - 187

Water, Dup 1/31/2007

MSW-6 07CV08-22 26 26.5 Water

11/29/2006

MSW-6 07CV08-51 58 - 60

Water 1/5/2007

MSW-7 07CV08-03 37 - 41

Water 11/28/2006

MSW-7 07CV08-04 37 -

41 Water, Dup 11/28/2006

MSW-7 07CV08-57 88 -

91 Water 1/10/2007

MSW-8 07CV08-30 29 - 37 Water 12/5/2006

MSW-8 07CV08-31 29 -37 Water, Dup

12/5/2006

MSW-8 07CV08-46 80 -

82 Water 1/3/2007

MSW-8 07CV08-83 147 - 149

Water 2/6/2007

MW-31D4 07CV08-27

10 - 11 Water 12/4/2006

MetalsAluminum µg/L 200 50 69,400 16,800 9,040 21,200 20,200 1,850 34,800 9,730 8,700 36,100 1,950 3,810 235,000 498,000 9,040Antimony µg/L 6.0 6.0 10.1 UJ 115 U 2.3 U 2.3 U 2.3 U 6.08 U 2.3 U 5.21 U 6.93 U 2.3 U 2.87 U 4.43 U 11.5 R 23 U 6.24 UArsenic µg/L 10 10 25.7 1.03 J* 6.15 17.4 17.9 10.2 17.9 6.28 5.65 10.5 10.6 6.22 83 JQ 175 5.64Barium µg/L 2000 2,000 475 4,470 226 193 184 979 476 196 194 342 196 217 2,720 3,640 199Beryllium µg/L 4.0 4.0 5.63 5.26 J* 0.275 J* 0.768 J* 0.799 J* 0.2 U 1.62 1.17 0.2 U 1.64 0.2 U 0.2 U 11.5 JQ 25.7 0.344 J*Cadmium µg/L 5.0 5.0 3.05 J* 8.75 U 1.98 U 0.35 U 0.35 U 0.35 U 0.35 U 0.35 U 0.35 U 1.49 U 0.35 U 0.35 U 1.75 U 3.5 U 0.35 UCalcium µg/L -- -- 566,000 19,400,000 100,000 208,000 207,000 562,000 285,000 102,000 100,000 201,000 63,200 90,700 2,470,000 3,520,000 220,000Chromium, total µg/L 100 100 214 65 U 36.1 75.8 76.9 11.5 112 82.4 79.2 67 11 18.8 795 1,070 17.7Cobalt µg/L -- 40 33.2 148 4.29 J* 7.82 8.41 0.76 U 15 5.73 5.35 13.6 0.76 U 1.76 J* 168 309 4.17 J*Copper µg/L 1,300 1,000 86.2 51.6 J* 11.9 27.2 27.7 4.24 U 56.5 12.6 11.2 43.9 1.17 U 4.54 J* 473 795 10.2Cyanide µg/L 200 200 3.89 J* 30 J* 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 UIron µg/L 300 300 109,000 237,000 35,000 40,800 41,400 46,400 51,200 32,100 26,900 44,500 5,010 8,570 466,000 845,000 10,900Lead µg/L 15.0 4.0 43.6 905 9.18 U 19.6 20.4 2.2 U 24.7 3.88 J* 6.5 16.5 2.2 U 2.2 U 315 JQ 389 2.75 UMagnesium µg/L -- 400,000 212,000 7,060,000 39,400 67,600 67,200 86,200 104,000 36,800 36,700 73,100 30,200 39,400 912,000 1,370,000 51,900Manganese µg/L 50 50 2,130 55,500 744 878 879 825 862 557 526 851 79 171 9,710 15,300 297Mercury µg/L 2.0 2.0 0.0645 J* 1.09 0.025 U 0.025 U 0.025 U 0.025 U 0.0362 J* 0.025 U 0.025 U 0.0259 J* 0.025 U 0.025 U 0.376 0.525 0.025 UNickel µg/L -- 100 104 333 19.1 27.1 28.1 7.8 64.5 41.4 41.3 41.1 5.2 9.49 487 847 13.1Potassium µg/L -- -- 22,700 27,100 5,990 8,840 8,280 27,700 14,800 6,860 6,670 13,000 3,100 3,780 45,200 102,000 4,940Selenium µg/L 50 50 30.1 65 U 2.6 U 2.6 U 2.6 U 3.89 J* 2.6 U 2.6 U 2.6 U 2.6 U 13 U 13 U 13 U 13 U 2.6 USilver µg/L 100 34 4.44 U 16.2 U 0.854 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 3.25 U 3.25 U 0.65 USodium µg/L -- 120,000 77,200 71,700 47,900 52,200 51,200 313,000 95,900 66,000 66,500 62,800 29,400 29,100 70,700 63,400 101,000Thallium µg/L 2.0 2.0 4.2 U 105 U 4.2 U 4.2 U 4.2 U 4.2 U 4.32 U 11.5 U 13.2 U 4.2 U 10.8 7.74 21 U 21 U 9.92Vanadium µg/L -- 4.5 142 27.5 U 16 41.7 42.4 4.5 67.5 19.5 17.9 63.6 3.37 7.77 531 1,090 17.9Zinc µg/L 5,000 2,400 636 JQ 2,070 880 1,240 1,220 1,050 4,880 912 982 229 JQ 306 317 2,690 JQ 2,480 911pCBSA4-Chlorobenzene Sulfonic Acid µg/L -- 7,300 1 U 4.4 5.5 4.2 4.6 390 120 95 94 1.1 1 U 1 U 26 2.8 1.2Pesticides/PBB/HBB2,4'-DDD µg/L -- -- 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.28 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 U2,4'-DDE µg/L -- -- 0.11 UJ NR 0.1 U 0.1 U 0.1 U 0.11 UJ 0.28 U 0.11 UJ 0.11 UJ 0.1 UJ 0.11 U 0.11 U 0.11 U 0.11 U 0.11 U2,4'-DDT µg/L -- -- 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.28 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 U4,4'-DDD µg/L -- 9.1 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.28 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 U4,4'-DDE µg/L -- 4.3 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.28 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 U4,4'-DDT µg/L -- 3.6 0.11 U NR 0.1 U 0.1 UJ 0.1 UJ 0.11 U 0.28 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 UHexabromobenzene µg/L -- -- 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.15 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 UHexabromobiphenyl µg/L -- -- 0.11 U NR 0.1 U 0.1 U 0.1 U 0.11 U 0.15 U 0.11 U 0.11 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.11 USVOCs2,4,5-Trichlorophenol µg/L -- 730 26.3 U NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 U2,4,6-Trichlorophenol µg/L -- 120 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 UJ 10.8 UJ 10.2 U 10.4 UJ 11.8 U2,4-Dichlorophenol µg/L -- 73 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2,4-Dimethylphenol µg/L -- 4.4 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2,4-Dinitrophenol µg/L -- -- 26.3 U NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 U2,4-Dinitrotoluene µg/L -- 7.7 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2,6-Dinitrotoluene µg/L -- -- 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2-Chloronaphthalene µg/L -- 1,800 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJ2-Chlorophenol µg/L -- 45 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2-Methylnaphthalene µg/L -- 260 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2-Methylphenol (O-Cresol) µg/L -- -- 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U2-Nitroaniline µg/L -- -- 26.3 UJ NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 U2-Nitrophenol µg/L -- 20 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U3,3'-Dichlorobenzidine µg/L -- 1.1 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJ3-Nitroaniline µg/L -- -- 26.3 UJ NR 27.8 UJ 25.8 UJ 25.6 UJ 27.5 UJ NR 27.6 UJ 27.2 UJ 27.5 UJ 27.5 UJ 27 UJ 25.6 UJ 25.9 UJ 29.6 UJ4,6-Dinitro-2-Methylphenol µg/L -- -- 26.3 U NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 U4-Bromophenyl phenyl ether µg/L -- -- 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 UJ 10.4 UJ 11.8 UJ4-Chloro-3-Methylphenol µg/L -- 150 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U4-Chloroaniline µg/L -- -- 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJ

MKE\090360007 1


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

MSW-5 07CV08-25 42 - 47

Water 11/30/2006

MSW-5 07CV08-52 118 - 128

Water 1/8/2007

MSW-5 07CV08-56 128 - 132

Water 1/9/2007

MSW-5 07CV08-80

177 - 187 Water 1/31/2007

MSW-5 07CV08-81 177 - 187


MSW-6 07CV08-22 26 26.5 Water

11/29/2006

MSW-6 07CV08-51 58 - 60

Water 1/5/2007

MSW-7 07CV08-03 37 - 41

Water 11/28/2006

MSW-7 07CV08-04 37 -

41 Water, Dup 11/28/2006

MSW-7 07CV08-57 88 -

91 Water 1/10/2007

MSW-8 07CV08-30 29 - 37 Water 12/5/2006

MSW-8 07CV08-31 29 -37 Water, Dup

12/5/2006

MSW-8 07CV08-46 80 -

82 Water 1/3/2007

MSW-8 07CV08-83 147 - 149

Water 2/6/2007

MW-31D4 07CV08-27

10 - 11 Water 12/4/2006

SVOCs (continued)4-Chlorophenyl phenyl ether µg/L -- -- 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U4-Methylphenol (P-Cresol) µg/L -- -- 10.5 U NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U4-Nitroaniline µg/L -- -- 26.3 U NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 U4-Nitrophenol µg/L -- -- 26.3 UJ NR 27.8 UJ 25.8 UJ 25.6 UJ 27.5 UJ NR 27.6 UJ 27.2 UJ 27.5 UJ 27.5 UJ 27 UJ 25.6 UJ 25.9 UJ 29.6 UJAcenaphthene µg/L -- 1,300 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UAcenaphthylene µg/L -- 52 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UAcetophenone µg/L -- 1500 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 UJ 10.8 UJ 10.2 U 10.4 UJ 11.8 UAnthracene µg/L -- 43 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBenzaldehyde µg/L -- -- 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 UJ 10.8 UJ 10.2 U 10.4 UJ 11.8 UJBenzo(A)anthracene µg/L -- 2.1 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBenzo(A)pyrene µg/L 0.2 5.0 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBenzo(B)fluoranthene µg/L -- 1.5 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBenzo(G,H,I)perylene µg/L -- 1.0 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJBenzo(K)fluoranthene µg/L -- 1.0 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 UJ 10.4 UJ 11.8 UBenzyl butyl phthalate µg/L -- 1,200 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBiphenyl (Diphenyl) µg/L -- -- 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBis(2-chloroethoxy) methane µg/L -- -- 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJBis(2-chloroethyl) ether (2-chloroethyl ether) µg/L -- 2.0 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBis(2-chloroisopropyl) ether µg/L -- -- 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UBis(2-ethylhexyl) phthalate µg/L -- 6.0 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UCaprolactam µg/L -- 5,800 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJCarbazol µg/L -- 85 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UChrysene µg/L -- 1.6 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 UJ 10.4 UJ 11.8 UDibenz(A,H)anthracene µg/L -- 2.0 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJDibenzofuran µg/L -- -- 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UDiethyl phthalate µg/L -- 5,500 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UDimethyl phthalate µg/L -- 73,000 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UDi-n-butyl phthalate µg/L -- 880 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UDi-n-octylphthalate µg/L -- 130 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 3.2 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UFluoranthene µg/L -- 210 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UFluorene µg/L -- 880 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UHexachlorobenzene µg/L -- 1.0 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UHexachlorobutadiene µg/L -- 15 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 UJ 10.4 UJ 11.8 UHexachlorocyclopentadiene µg/L 50 50 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJHexachloroethane µg/L -- 7.3 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJIndeno(1,2,3-C,D)pyrene µg/L -- 2.0 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UIsophorone µg/L -- 770 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UNaphthalene µg/L -- 520 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJNitrobenzene µg/L -- 3.4 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UN-nitrosodi-n-propylamine µg/L -- 5.0 10.5 UJ NR 11.1 U 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UJN-nitrosodiphenylamine µg/L -- 270 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UPentachlorophenol µg/L -- 1.0 26.3 U NR 27.8 U 25.8 UJ 25.6 UJ 27.5 U NR 27.6 U 27.2 U 27.5 UJ 27.5 U 27 U 25.6 U 25.9 UJ 29.6 UPhenanthrene µg/L -- 52 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 UPhenol µg/L -- 4,400 10.5 UJ NR 11.1 UJ 10.3 UJ 10.2 UJ 11 UJ NR 11 UJ 10.9 UJ 11 UJ 11 UJ 10.8 UJ 10.2 UJ 10.4 UJ 11.8 UJPyrene µg/L -- 140 10.5 U NR 11.1 U 10.3 UJ 10.2 UJ 11 U NR 11 U 10.9 U 11 UJ 11 U 10.8 U 10.2 U 10.4 UJ 11.8 U

MKE\090360007 2


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

MSW-5 07CV08-25 42 - 47

Water 11/30/2006

MSW-5 07CV08-52 118 - 128

Water 1/8/2007

MSW-5 07CV08-56 128 - 132

Water 1/9/2007

MSW-5 07CV08-80

177 - 187 Water 1/31/2007

MSW-5 07CV08-81 177 - 187


MSW-6 07CV08-22 26 26.5 Water

11/29/2006

MSW-6 07CV08-51 58 - 60

Water 1/5/2007

MSW-7 07CV08-03 37 - 41

Water 11/28/2006

MSW-7 07CV08-04 37 -

41 Water, Dup 11/28/2006

MSW-7 07CV08-57 88 -

91 Water 1/10/2007

MSW-8 07CV08-30 29 - 37 Water 12/5/2006

MSW-8 07CV08-31 29 -37 Water, Dup

12/5/2006

MSW-8 07CV08-46 80 -

82 Water 1/3/2007

MSW-8 07CV08-83 147 - 149

Water 2/6/2007

MW-31D4 07CV08-27

10 - 11 Water 12/4/2006

VOCs --1,1,1-Trichloroethane µg/L 200 200 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U1,1,2,2-Tetrachloroethane µg/L -- 8.5 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U1,1,2-Trichloro-1,2,2-Trifluoroethane µg/L -- 170,000 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,1,2-Trichloroethane µg/L 5.0 5.0 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U1,1-Dichloroethane µg/L -- 880 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,1-Dichloroethene µg/L 7.0 7.0 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U1,2,4-Trichlorobenzene µg/L 70 70 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dibromo-3-chloropropane µg/L 0.2 0.2 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dibromoethane (Ethylene Dibromide) µg/L -- 0.05 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UVOCs (continued)1,2-Dichlorobenzene µg/L 600 600 3.5 U 3.5 U 3.5 U 0.76 J* 0.77 J* 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dichloroethane µg/L 5.0 5.0 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U1,2-Dichloroethylenes µg/L 170 -- 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,2-Dichloropropane µg/L 5.0 5.0 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,3-Dichlorobenzene µg/L -- 6.6 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,4-Dichlorobenzene µg/L 75 75 3.5 U 3.5 U 3.5 U 0.59 J* 0.55 J* 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U2-Hexanone µg/L -- 1,000 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 UAcetone µg/L -- 730 12 U 8.1 J* 6.3 J* 12 U 7.2 J* 12 U 15.2 12 U 12 U 12 UJ 12 U 12 U 9.3 J* 12 U 12 UBenzene µg/L 5.0 5.0 0.16 J* 0.3 J* 0.27 J* 0.5 U 0.5 U 0.5 U 0.16 J* 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.31 J* 0.5 U 0.5 UBromochloromethane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UBromodichloromethane µg/L -- 80 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 UBromoform µg/L -- 80 1.8 U 1.8 UJ 1.8 U 1.8 U 1.8 U 1.8 U 1.8 UJ 1.8 U 1.8 U 1.8 UJ 1.8 U 1.8 U 1.8 U 1.8 U 1.8 UBromomethane µg/L -- 10 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 UCarbon disulfide µg/L -- 800 2.5 U 2.5 U 2.5 U 0.51 J* 0.6 J* 2.5 U 0.67 J* 0.4 J* 0.96 J* 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 UCarbon tetrachloride µg/L 5.0 5.0 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UChlorobenzene µg/L 100 100 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UChloroethane µg/L -- 430 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 UChloroform µg/L -- 80 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 UChloromethane µg/L -- 260 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 Ucis-1,3-Dichloropropene µg/L -- -- 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UCyclohexane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UDibromochloromethane µg/L -- 80 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 UDichlorodifluoromethane µg/L -- 1,700 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UDimethyl Benzene µg/L -- 280 1.7 U 1.7 U 1.1 J* 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 UEthylbenzene µg/L 700 74 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 UIsopropylbenzene µg/L -- 800 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethyl Acetate µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UJ 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethyl Ethyl Ketone (2-Butanone) µg/L -- 13,000 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 UMethyl Isobutyl Ketone (4-Methyl-2-Pentanone) µg/L -- 1,800 3.5 U 3.5 U 3.5 UJ 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethylcyclohexane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethylene chloride µg/L -- 5.0 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 UStyrene µg/L 100 100 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UTetrachloroethene µg/L 5.0 5.0 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UToluene µg/L 1,000 790 0.37 J* 0.78 J* 2 0.86 J* 0.83 J* 1 U 0.46 J* 0.35 J* 1 U 0.7 J* 1 U 1 U 0.66 J* 2 1 Utrans-1,3-Dichloropropene µg/L -- -- 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 UTrichloroethene µg/L 5.0 5.0 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 UTrichlorofluoromethane µg/L -- 2,600 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UVinyl chloride µg/L 2.0 2.0 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U

NR = Analysis not requested.NA = Not analyzed (sample bottle broke).NS = Not sampled (well was not operable due to broken pump).U = The analyte was not detected above the method detection limit (MDL) and is, therefore, considered not detected.UJ = Estimated value. The analyte was not detected above the MDL and is deemed biased low as a result of quality control deficiencies.J = The associated numerical value is estimated. No differentiation has been made between values estimated due to the concentration being below the reporting limit and values estimated due to a quality control deficiency.J* = The associated numerical value is the approximate concentration of the analyte in the sample. The value is estimated due to the analyte being detected at a concentration below the reporting limit.JQ = The associated numerical value is estimated due to a quality control deficiency.R = The result is unusable due to deficiencies in the ability to analyze the sample and meet QC criteria.R* = The result is unusable due to problems documented during sample collection. Highlight = exceeds US EPA MCLsBOLD = exceeds MDEQ Part 201 Drinking Water CriteriaSecondary Maximum Contaminant Levels (SMCLs), shown in italics, are non-enforceable guidelines for constituents that may cause cosmetic or aesthetic effects, such as offensive taste, odor, color or staining.

MKE\090360007 3


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

MetalsAluminum µg/L 200 50Antimony µg/L 6.0 6.0Arsenic µg/L 10 10Barium µg/L 2000 2,000Beryllium µg/L 4.0 4.0Cadmium µg/L 5.0 5.0Calcium µg/L -- --Chromium, total µg/L 100 100Cobalt µg/L -- 40Copper µg/L 1,300 1,000Cyanide µg/L 200 200Iron µg/L 300 300Lead µg/L 15.0 4.0Magnesium µg/L -- 400,000Manganese µg/L 50 50Mercury µg/L 2.0 2.0Nickel µg/L -- 100Potassium µg/L -- --Selenium µg/L 50 50Silver µg/L 100 34Sodium µg/L -- 120,000Thallium µg/L 2.0 2.0Vanadium µg/L -- 4.5Zinc µg/L 5,000 2,400pCBSA4-Chlorobenzene Sulfonic Acid µg/L -- 7,300Pesticides/PBB/HBB2,4'-DDD µg/L -- --2,4'-DDE µg/L -- --2,4'-DDT µg/L -- --4,4'-DDD µg/L -- 9.14,4'-DDE µg/L -- 4.34,4'-DDT µg/L -- 3.6Hexabromobenzene µg/L -- --Hexabromobiphenyl µg/L -- --SVOCs2,4,5-Trichlorophenol µg/L -- 7302,4,6-Trichlorophenol µg/L -- 1202,4-Dichlorophenol µg/L -- 732,4-Dimethylphenol µg/L -- 4.42,4-Dinitrophenol µg/L -- --2,4-Dinitrotoluene µg/L -- 7.72,6-Dinitrotoluene µg/L -- --2-Chloronaphthalene µg/L -- 1,8002-Chlorophenol µg/L -- 452-Methylnaphthalene µg/L -- 2602-Methylphenol (O-Cresol) µg/L -- --2-Nitroaniline µg/L -- --2-Nitrophenol µg/L -- 203,3'-Dichlorobenzidine µg/L -- 1.13-Nitroaniline µg/L -- --4,6-Dinitro-2-Methylphenol µg/L -- --4-Bromophenyl phenyl ether µg/L -- --4-Chloro-3-Methylphenol µg/L -- 1504-Chloroaniline µg/L -- --

MW-31D4 07CV08-29

42 - 47 Water 12/4/2006

MW-31D4 07CV08-45 61 - 68 Water 12/21/2006

MW-31D4 07CV08-58

88 - 98 Water 1/11/2007

MW-31D4 07CV08-59

98 - 108 Water 1/11/2007

MW-31D4 07CV08-60 108 -

118 Water 1/11/2007

MW-31D4 07CV08-76 136 -

146 Water 1/25/2007

MW-31D4 07CV08-77 146 -

156 Water 1/25/2007

MW-31D4 07CV08-78 156 -

166 Water 1/25/2007

MW-35D3 07CV08-23 14.5

- 17 Water 11/29/2006

MW-35D3 07CV08-62

78 - 80 Water 1/15/2007

MSW-36D4 07CV08-48

78 - 88 Water 1/4/2007

MSW-36D4 07CV08-49

78 - 88 Water, Dup

1/4/2007

MSW-36D4 07CV08-85 157 -

167 Water 2/15/2007

MSW-36D4 07CV08-89 177 -

187 Water 2/16/2007

MSW-38D4 07CV08-01

27 - 31 Water 11/27/2006

286,000 166 128 272 3,360 149 2,660 44,700 12,400 112,000 4,600 5,440 1,900 6,170 177,00011.5 U 11.5 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 4.28 U 2.3 U 2.3 U 2.3 U 8.98 U 2.3 U 15 U251 4.43 J* 1.24 J* 1.14 J* 4.91 J* 0.49 J* 26.9 40.9 454 34.2 19.9 JQ 19 11.6 3.62 J* 121

1,960 189 200 54.8 188 61.1 113 318 338 653 191 191 85.2 106 1,2006.4 0.2 U 0.2 U 0.2 U 0.268 J* 0.2 U 0.429 J* 1.77 0.2 U 10.4 0.347 J* 0.398 J* 0.2 U 0.339 J* 5.33.5 U 8.99 2.01 U 2.16 U 1.28 U 1.45 0.35 U 0.35 U 0.35 U 0.35 U 1.12 U 1.03 U 1.08 2.23 U 3.5 U

6,980,000 639,000 285,000 81,500 371,000 86,400 499,000 454,000 227,000 712,000 176,000 184,000 109,000 138,000 3,980,0001,190 1.3 U 1.3 U 1.63 J* 17.7 7.86 30.7 117 26.7 252 31.2 35.1 26.7 106 426

275 0.94 J* 1.04 J* 1.1 J* 2.32 J* 0.76 U 5.02 19.6 13.2 49.8 4.91 J* 5.06 1.82 J* 3.68 J* 1161,020 0.62 U 4.42 U 1.2 U 10.4 0.62 U 18.2 57.2 28 3,820 8.17 10.6 12.2 U 9.17 354

3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 U 4.14 U 3.7 U 5.06 J* 6.31 J* 4.51 J* 3.7 U 3.7 U 5.17 J*686,000 1,160 5,420 1,390 12,700 23,400 34,300 67,000 67,200 161,000 15,800 17,700 6,520 13,000 334,000

417 44.4 13.7 3.18 J* 14.2 2.2 U 40.5 37.7 22.9 91.9 8.07 U 12.8 10.2 U 4.41 J* 1302,890,000 104,000 70,200 26,100 91,700 28,300 201,000 122,000 72,000 270,000 53,400 55,200 38,600 53,200 1,640,000

21,000 704 225 94.3 416 483 1,510 1,790 2,240 2,890 290 319 269 343 8,3601.01 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.0363 J* 0.0545 J* 0.0285 J* 0.118 J* 0.025 U 0.025 U 0.025 U 0.025 U 0.208992 1.7 U 1.7 U 1.92 J* 6.59 7.02 13.8 56.7 79 161 18 20.8 14.6 54.2 342

60,800 15,800 6,090 5,100 7,840 2,090 2,690 17,700 11,600 32,000 5,820 6,060 2,970 4,710 63,00085.4 52 U 13 U 2.6 U 13 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 13 U 13 U 2.6 U 2.6 U 50.46.5 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.85 U 0.65 U 0.65 U 0.65 U 1.76 U 3.25 U

78,500 212,000 112,000 57,300 117,000 65,400 68,600 63,600 61,200 51,500 87,200 86,900 42,600 41,900 770,00042 U 6.17 4.2 U 4.2 U 4.2 U 4.2 U 4.2 U 4.2 U 4.52 U 4.2 U 4.2 U 4.2 U 4.2 U 4.2 U 21 U

893 1.1 U 1.1 U 1.1 U 6.89 1.15 J* 18.4 90.3 30.6 260 11.2 13 4.86 13.4 4392,240 834 246 126 376 1,340 1,980 2,910 627 982 1,950 2,160 654 801 7,610

4.6 32 1.7 1.7 30 23 22 18 1 U 5.4 74 73 0.62 J* 0.54 J* 420,000

0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 UJ 0.1 UJ 0.1 UJ 0.11 U 0.11 U 0.11 U 0.11 UJ 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 UJ0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 UJ 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.11 U 0.11 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 U 0.12 U0.15 U 0.1 U 0.1 U 0.1 U 0.02 J* 0.11 U 0.11 U 0.11 U 0.11 U 0.1 U 0.1 U 0.1 U 0.11 U 0.11 UJ 0.12 U

30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 U 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 UJ 12.3 U30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 U 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 U 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U30.9 UJ 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 UJ 26.3 UJ 25.6 UJ 25.6 UJ 25.6 UJ 25.8 U 30.9 UJ30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 UJ 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 UJ 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 UJ 10.2 UJ 10.2 UJ 10.3 U 12.3 UJ

MKE\090360007 4


Constituent Uni

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US

EPA

Max

imum

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SVOCs (continued)4-Chlorophenyl phenyl ether µg/L -- --4-Methylphenol (P-Cresol) µg/L -- --4-Nitroaniline µg/L -- --4-Nitrophenol µg/L -- --Acenaphthene µg/L -- 1,300Acenaphthylene µg/L -- 52Acetophenone µg/L -- 1500Anthracene µg/L -- 43Benzaldehyde µg/L -- --Benzo(A)anthracene µg/L -- 2.1Benzo(A)pyrene µg/L 0.2 5.0Benzo(B)fluoranthene µg/L -- 1.5Benzo(G,H,I)perylene µg/L -- 1.0Benzo(K)fluoranthene µg/L -- 1.0Benzyl butyl phthalate µg/L -- 1,200Biphenyl (Diphenyl) µg/L -- --Bis(2-chloroethoxy) methane µg/L -- --Bis(2-chloroethyl) ether (2-chloroethyl ether) µg/L -- 2.0Bis(2-chloroisopropyl) ether µg/L -- --Bis(2-ethylhexyl) phthalate µg/L -- 6.0Caprolactam µg/L -- 5,800Carbazol µg/L -- 85Chrysene µg/L -- 1.6Dibenz(A,H)anthracene µg/L -- 2.0Dibenzofuran µg/L -- --Diethyl phthalate µg/L -- 5,500Dimethyl phthalate µg/L -- 73,000Di-n-butyl phthalate µg/L -- 880Di-n-octylphthalate µg/L -- 130Fluoranthene µg/L -- 210Fluorene µg/L -- 880Hexachlorobenzene µg/L -- 1.0Hexachlorobutadiene µg/L -- 15Hexachlorocyclopentadiene µg/L 50 50Hexachloroethane µg/L -- 7.3Indeno(1,2,3-C,D)pyrene µg/L -- 2.0Isophorone µg/L -- 770Naphthalene µg/L -- 520Nitrobenzene µg/L -- 3.4N-nitrosodi-n-propylamine µg/L -- 5.0N-nitrosodiphenylamine µg/L -- 270Pentachlorophenol µg/L -- 1.0Phenanthrene µg/L -- 52Phenol µg/L -- 4,400Pyrene µg/L -- 140

MW-31D4 07CV08-29

42 - 47 Water 12/4/2006

MW-31D4 07CV08-45 61 - 68 Water 12/21/2006

MW-31D4 07CV08-58

88 - 98 Water 1/11/2007

MW-31D4 07CV08-59

98 - 108 Water 1/11/2007

MW-31D4 07CV08-60 108 -

118 Water 1/11/2007

MW-31D4 07CV08-76 136 -

146 Water 1/25/2007

MW-31D4 07CV08-77 146 -

156 Water 1/25/2007

MW-31D4 07CV08-78 156 -

166 Water 1/25/2007

MW-35D3 07CV08-23 14.5

- 17 Water 11/29/2006

MW-35D3 07CV08-62

78 - 80 Water 1/15/2007

MSW-36D4 07CV08-48

78 - 88 Water 1/4/2007

MSW-36D4 07CV08-49

78 - 88 Water, Dup

1/4/2007

MSW-36D4 07CV08-85 157 -

167 Water 2/15/2007

MSW-36D4 07CV08-89 177 -

187 Water 2/16/2007

MSW-38D4 07CV08-01

27 - 31 Water 11/27/2006

12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 UJ 12.3 UJ30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 U 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U30.9 UJ 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 UJ 26.3 UJ 25.6 UJ 25.6 UJ 25.6 UJ 25.8 UJ 30.9 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 R 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 R 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 R 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 UJ 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 UJ 12.3 UJ12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 UJ 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U30.9 U 25.5 UJ 27 UJ 27.2 UJ 25 UJ 26.3 UJ 26.3 UJ 26.9 UJ 27.2 U 26.3 UJ 25.6 U 25.6 U 25.6 UJ 25.8 U 30.9 U12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U12.3 UJ 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 UJ 10.5 UJ 10.2 UJ 10.2 UJ 10.2 UJ 10.3 UJ 12.3 UJ12.3 U 10.2 UJ 10.8 UJ 10.9 UJ 10 UJ 10.5 UJ 10.5 UJ 10.8 UJ 10.9 U 10.5 U 10.2 U 10.2 U 10.2 UJ 10.3 U 12.3 U

MKE\090360007 5


Constituent Uni

ts

US

EPA

Max

imum

C

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min

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(M

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VOCs --1,1,1-Trichloroethane µg/L 200 2001,1,2,2-Tetrachloroethane µg/L -- 8.51,1,2-Trichloro-1,2,2-Trifluoroethane µg/L -- 170,0001,1,2-Trichloroethane µg/L 5.0 5.01,1-Dichloroethane µg/L -- 8801,1-Dichloroethene µg/L 7.0 7.01,2,4-Trichlorobenzene µg/L 70 701,2-Dibromo-3-chloropropane µg/L 0.2 0.21,2-Dibromoethane (Ethylene Dibromide) µg/L -- 0.05VOCs (continued)1,2-Dichlorobenzene µg/L 600 6001,2-Dichloroethane µg/L 5.0 5.01,2-Dichloroethylenes µg/L 170 --1,2-Dichloropropane µg/L 5.0 5.01,3-Dichlorobenzene µg/L -- 6.61,4-Dichlorobenzene µg/L 75 752-Hexanone µg/L -- 1,000Acetone µg/L -- 730Benzene µg/L 5.0 5.0Bromochloromethane µg/L -- --Bromodichloromethane µg/L -- 80Bromoform µg/L -- 80Bromomethane µg/L -- 10Carbon disulfide µg/L -- 800Carbon tetrachloride µg/L 5.0 5.0Chlorobenzene µg/L 100 100Chloroethane µg/L -- 430Chloroform µg/L -- 80Chloromethane µg/L -- 260cis-1,3-Dichloropropene µg/L -- --Cyclohexane µg/L -- --Dibromochloromethane µg/L -- 80Dichlorodifluoromethane µg/L -- 1,700Dimethyl Benzene µg/L -- 280Ethylbenzene µg/L 700 74Isopropylbenzene µg/L -- 800Methyl Acetate µg/L -- --Methyl Ethyl Ketone (2-Butanone) µg/L -- 13,000Methyl Isobutyl Ketone (4-Methyl-2-Pentanone) µg/L -- 1,800Methylcyclohexane µg/L -- --Methylene chloride µg/L -- 5.0Styrene µg/L 100 100Tetrachloroethene µg/L 5.0 5.0Toluene µg/L 1,000 790trans-1,3-Dichloropropene µg/L -- --Trichloroethene µg/L 5.0 5.0Trichlorofluoromethane µg/L -- 2,600Vinyl chloride µg/L 2.0 2.0

MW-31D4 07CV08-29

42 - 47 Water 12/4/2006

MW-31D4 07CV08-45 61 - 68 Water 12/21/2006

MW-31D4 07CV08-58

88 - 98 Water 1/11/2007

MW-31D4 07CV08-59

98 - 108 Water 1/11/2007

MW-31D4 07CV08-60 108 -

118 Water 1/11/2007

MW-31D4 07CV08-76 136 -

146 Water 1/25/2007

MW-31D4 07CV08-77 146 -

156 Water 1/25/2007

MW-31D4 07CV08-78 156 -

166 Water 1/25/2007

MW-35D3 07CV08-23 14.5

- 17 Water 11/29/2006

MW-35D3 07CV08-62

78 - 80 Water 1/15/2007

MSW-36D4 07CV08-48

78 - 88 Water 1/4/2007

MSW-36D4 07CV08-49

78 - 88 Water, Dup

1/4/2007

MSW-36D4 07CV08-85 157 -

167 Water 2/15/2007

MSW-36D4 07CV08-89 177 -

187 Water 2/16/2007

MSW-38D4 07CV08-01

27 - 31 Water 11/27/2006

1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U

3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 0.64 J* 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 UJ 4.6 UJ 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U12 U 6.6 J* 12 UJ 12 UJ 12 UJ 12 U 12 U 12 U 12 U 12 U 12 U 12 U 12 U 12 U 12 U0.5 U 0.5 U 0.5 U 0.22 J* 0.22 J* 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.2 J* 0.19 J* 0.5 U 0.5 U 0.24 J*3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U1.8 U 1.8 U 1.8 UJ 1.8 UJ 1.8 UJ 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U2.5 U 2.5 U 2.2 J* 4.9 2.5 U 2.5 U 0.73 J* 2.5 UJ 2.5 U 0.53 J* 0.46 J* 0.41 J* 1.2 J* 2.5 U 1.3 J*1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.1 J* 0.84 J* 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 0.57 J* 0.6 J* 1.7 U 1.7 U 1.7 U1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 UJ 3.5 UJ 3.5 UJ 3.5 UJ 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 UJ 7.4 UJ 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UJ 3.5 UJ 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U

1 U 1 U 0.84 J* 1.1 1.1 1.8 4.1 4.5 0.46 J* 0.47 J* 0.91 J* 0.91 J* 1 U 0.5 J* 0.88 J*1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 1.7 J* 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U

MKE\090360007 6


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

MetalsAluminum µg/L 200 50Antimony µg/L 6.0 6.0Arsenic µg/L 10 10Barium µg/L 2000 2,000Beryllium µg/L 4.0 4.0Cadmium µg/L 5.0 5.0Calcium µg/L -- --Chromium, total µg/L 100 100Cobalt µg/L -- 40Copper µg/L 1,300 1,000Cyanide µg/L 200 200Iron µg/L 300 300Lead µg/L 15.0 4.0Magnesium µg/L -- 400,000Manganese µg/L 50 50Mercury µg/L 2.0 2.0Nickel µg/L -- 100Potassium µg/L -- --Selenium µg/L 50 50Silver µg/L 100 34Sodium µg/L -- 120,000Thallium µg/L 2.0 2.0Vanadium µg/L -- 4.5Zinc µg/L 5,000 2,400pCBSA4-Chlorobenzene Sulfonic Acid µg/L -- 7,300Pesticides/PBB/HBB2,4'-DDD µg/L -- --2,4'-DDE µg/L -- --2,4'-DDT µg/L -- --4,4'-DDD µg/L -- 9.14,4'-DDE µg/L -- 4.34,4'-DDT µg/L -- 3.6Hexabromobenzene µg/L -- --Hexabromobiphenyl µg/L -- --SVOCs2,4,5-Trichlorophenol µg/L -- 7302,4,6-Trichlorophenol µg/L -- 1202,4-Dichlorophenol µg/L -- 732,4-Dimethylphenol µg/L -- 4.42,4-Dinitrophenol µg/L -- --2,4-Dinitrotoluene µg/L -- 7.72,6-Dinitrotoluene µg/L -- --2-Chloronaphthalene µg/L -- 1,8002-Chlorophenol µg/L -- 452-Methylnaphthalene µg/L -- 2602-Methylphenol (O-Cresol) µg/L -- --2-Nitroaniline µg/L -- --2-Nitrophenol µg/L -- 203,3'-Dichlorobenzidine µg/L -- 1.13-Nitroaniline µg/L -- --4,6-Dinitro-2-Methylphenol µg/L -- --4-Bromophenyl phenyl ether µg/L -- --4-Chloro-3-Methylphenol µg/L -- 1504-Chloroaniline µg/L -- --

MSW-38D4 07CV08-84 112 -

117 Water 2/15/2007

MSW-38D4 07CV08-87 117 - 127

Water 2/15/2007

MSW-38D4 07CV08-88 127 -

133 Water 2/15/2007

MSW-38D4 07CV08-90 147 -

157 Water 2/16/2007

122,000 11,100 10,800 35,30023 U 11.5 U 2.3 U 11.5 U

143 JQ 143 40.7 42.51,210 444 274 2866.26 1.32 0.59 J* 1.867.76 JQ 5.28 13.4 9.56

2,500,000 1,300,000 507,000 628,000235 54.2 61.9 14960.2 11 9.14 17.6200 53.1 46.5 81.63.7 U 6.32 J* 5.98 J* 3.7 U

175,000 35,000 34,900 78,300203 39.4 28.6 41

361,000 300,000 169,000 194,0009,460 3,490 1,260 1,8400.025 U 0.025 U 0.025 U 0.0526 J*

171 34 23.9 54.331,000 9,380 8,490 17,100

13 U 13 U 2.6 U 2.6 U25.6 13.2 5.06 U 5.83

53,100 81,000 73,900 55,40023.9 JQ 4.2 U 4.2 U 4.2 U255 18.7 30 87

2,730 6,720 1,980 1,900

2.3 7.2 6.3 4.7

0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 U0.12 U 0.11 U 0.1 U 0.1 UJ

25.8 UJ 25.6 UJ 26 UJ 25.8 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ25.8 UJ 25.6 UJ 26 UJ 25.8 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U25.8 UJ 25.6 UJ 26 UJ 25.8 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U25.8 UJ 25.6 UJ 26 UJ 25.8 U25.8 UJ 25.6 UJ 26 UJ 25.8 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U

MKE\090360007 7


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

SVOCs (continued)4-Chlorophenyl phenyl ether µg/L -- --4-Methylphenol (P-Cresol) µg/L -- --4-Nitroaniline µg/L -- --4-Nitrophenol µg/L -- --Acenaphthene µg/L -- 1,300Acenaphthylene µg/L -- 52Acetophenone µg/L -- 1500Anthracene µg/L -- 43Benzaldehyde µg/L -- --Benzo(A)anthracene µg/L -- 2.1Benzo(A)pyrene µg/L 0.2 5.0Benzo(B)fluoranthene µg/L -- 1.5Benzo(G,H,I)perylene µg/L -- 1.0Benzo(K)fluoranthene µg/L -- 1.0Benzyl butyl phthalate µg/L -- 1,200Biphenyl (Diphenyl) µg/L -- --Bis(2-chloroethoxy) methane µg/L -- --Bis(2-chloroethyl) ether (2-chloroethyl ether) µg/L -- 2.0Bis(2-chloroisopropyl) ether µg/L -- --Bis(2-ethylhexyl) phthalate µg/L -- 6.0Caprolactam µg/L -- 5,800Carbazol µg/L -- 85Chrysene µg/L -- 1.6Dibenz(A,H)anthracene µg/L -- 2.0Dibenzofuran µg/L -- --Diethyl phthalate µg/L -- 5,500Dimethyl phthalate µg/L -- 73,000Di-n-butyl phthalate µg/L -- 880Di-n-octylphthalate µg/L -- 130Fluoranthene µg/L -- 210Fluorene µg/L -- 880Hexachlorobenzene µg/L -- 1.0Hexachlorobutadiene µg/L -- 15Hexachlorocyclopentadiene µg/L 50 50Hexachloroethane µg/L -- 7.3Indeno(1,2,3-C,D)pyrene µg/L -- 2.0Isophorone µg/L -- 770Naphthalene µg/L -- 520Nitrobenzene µg/L -- 3.4N-nitrosodi-n-propylamine µg/L -- 5.0N-nitrosodiphenylamine µg/L -- 270Pentachlorophenol µg/L -- 1.0Phenanthrene µg/L -- 52Phenol µg/L -- 4,400Pyrene µg/L -- 140

MSW-38D4 07CV08-84 112 -

117 Water 2/15/2007

MSW-38D4 07CV08-87 117 - 127

Water 2/15/2007

MSW-38D4 07CV08-88 127 -

133 Water 2/15/2007

MSW-38D4 07CV08-90 147 -

157 Water 2/16/2007

10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ25.8 UJ 25.6 UJ 26 UJ 25.8 U25.8 UJ 25.6 UJ 26 UJ 25.8 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 R10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 R10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 R10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U9.4 J* 4.3 J* 10.4 UJ 10.3 U

10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U25.8 UJ 25.6 UJ 26 UJ 25.8 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 U10.3 UJ 10.2 UJ 10.4 UJ 10.3 UJ10.3 UJ 10.2 UJ 10.4 UJ 10.3 U

MKE\090360007 8


Constituent Uni

ts

US

EPA

Max

imum

C

onta

min

ant L

evel

(M

CL)

or

Seco

ndar

y M

CL

(ug/

L)

Mic

higa

n Pa

rt 2

01

Drin

king

Wat

er

Crit

eria

ug/

L

VOCs --1,1,1-Trichloroethane µg/L 200 2001,1,2,2-Tetrachloroethane µg/L -- 8.51,1,2-Trichloro-1,2,2-Trifluoroethane µg/L -- 170,0001,1,2-Trichloroethane µg/L 5.0 5.01,1-Dichloroethane µg/L -- 8801,1-Dichloroethene µg/L 7.0 7.01,2,4-Trichlorobenzene µg/L 70 701,2-Dibromo-3-chloropropane µg/L 0.2 0.21,2-Dibromoethane (Ethylene Dibromide) µg/L -- 0.05VOCs (continued)1,2-Dichlorobenzene µg/L 600 6001,2-Dichloroethane µg/L 5.0 5.01,2-Dichloroethylenes µg/L 170 --1,2-Dichloropropane µg/L 5.0 5.01,3-Dichlorobenzene µg/L -- 6.61,4-Dichlorobenzene µg/L 75 752-Hexanone µg/L -- 1,000Acetone µg/L -- 730Benzene µg/L 5.0 5.0Bromochloromethane µg/L -- --Bromodichloromethane µg/L -- 80Bromoform µg/L -- 80Bromomethane µg/L -- 10Carbon disulfide µg/L -- 800Carbon tetrachloride µg/L 5.0 5.0Chlorobenzene µg/L 100 100Chloroethane µg/L -- 430Chloroform µg/L -- 80Chloromethane µg/L -- 260cis-1,3-Dichloropropene µg/L -- --Cyclohexane µg/L -- --Dibromochloromethane µg/L -- 80Dichlorodifluoromethane µg/L -- 1,700Dimethyl Benzene µg/L -- 280Ethylbenzene µg/L 700 74Isopropylbenzene µg/L -- 800Methyl Acetate µg/L -- --Methyl Ethyl Ketone (2-Butanone) µg/L -- 13,000Methyl Isobutyl Ketone (4-Methyl-2-Pentanone) µg/L -- 1,800Methylcyclohexane µg/L -- --Methylene chloride µg/L -- 5.0Styrene µg/L 100 100Tetrachloroethene µg/L 5.0 5.0Toluene µg/L 1,000 790trans-1,3-Dichloropropene µg/L -- --Trichloroethene µg/L 5.0 5.0Trichlorofluoromethane µg/L -- 2,600Vinyl chloride µg/L 2.0 2.0

MSW-38D4 07CV08-84 112 -

117 Water 2/15/2007

MSW-38D4 07CV08-87 117 - 127

Water 2/15/2007

MSW-38D4 07CV08-88 127 -

133 Water 2/15/2007

MSW-38D4 07CV08-90 147 -

157 Water 2/16/2007

1.8 U 1.8 U 1.8 U 1.8 U2.5 U 2.5 U 2.5 U 2.5 U3.5 U 3.5 U 3.5 U 3.5 U2.1 U 2.1 U 2.1 U 2.1 U2.2 U 2.2 U 2.2 U 2.2 U2.9 U 2.9 U 2.9 U 2.9 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U

3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.7 U2.2 U 2.2 U 2.2 U 2.2 U2.2 U 2.2 U 2.2 U 2.2 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U4.6 U 4.6 U 4.6 U 4.6 U12 U 12 U 12 U 12 U0.5 U 0.5 U 0.26 J* 0.5 U3.5 U 3.5 U 3.5 U 3.5 U1.6 U 1.6 U 1.6 U 1.6 U1.8 U 1.8 U 1.8 U 1.8 U2.8 U 2.8 U 2.8 U 2.8 U2.5 U 2.5 U 2.5 U 2.5 U1.4 U 1.4 U 1.4 U 1.4 U1.4 U 1.4 U 1.4 U 1.4 U5.9 U 5.9 U 5.9 U 5.9 U2.4 U 2.4 U 2.4 U 2.4 U3.2 U 3.2 U 3.2 U 3.2 U1.4 U 1.4 U 1.4 U 1.4 U3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.7 U3.5 U 3.5 U 3.5 U 3.5 U1.7 U 1.7 U 1.7 U 1.7 U1.5 U 1.5 U 1.5 U 1.5 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U7.4 U 7.4 U 7.4 U 7.4 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U3.1 U 3.1 U 3.1 U 3.1 U1.4 U 1.4 U 1.4 U 1.4 U1.4 U 1.4 U 1.4 U 1.4 U5.3 7.8 8.6 6.31.5 U 1.5 U 1.5 U 1.5 U1.6 U 1.6 U 1.6 U 1.6 U3.5 U 3.5 U 3.5 U 3.5 U3.5 U 3.5 U 3.5 U 3.5 U

MKE\090360007 9

TABLE 8City Well, MW 30I, MW 30D, and Sentry Well Analytical ResultsFebruary 20-25, 2007Velsicol Chemical/Pine River Superfund Site, OU1

Constituent Uni

ts

US

EPA

M

axim

um

Con

tam

inan

t Le

vel (

MC

L) o

r Se

cond

ary

MC

L ug

/L

Mic

higa

n Pa

rt

201

Drin

king

W

ater

Crit

eria

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MetalsAluminum µg/L 200 50 15 U 20.4 U 15.7 U 15 U 15 U 15 U 73.2 J* NR NR 56.3 J* 1,070 9,670 976 605 9,340 6,100 1,130 1,200Antimony µg/L 6.0 6.0 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U NR NR 2.3 U 2.3 U 2.54 U 2.3 U 2.3 U 2.3 U 2.3 U 5.76 U 2.49 UArsenic µg/L 10 10 0.29 U 0.921 J* 0.805 J* 1.41 J* 1.13 J* 5.97 1.6 J* NR NR 1.07 J* 0.501 J* 1.14 J* 0.29 U 0.293 J* 2.52 J* 2.94 J* 0.592 J* 0.6 J*Barium µg/L 2000 2,000 80.1 118 113 60.4 75.1 99.5 41.9 NR NR 245 80.7 75.2 176 57.1 193 99.6 47.7 47.9Beryllium µg/L 4.0 4.0 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U NR NR 0.2 U 0.2 U 0.248 J* 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UCadmium µg/L 5.0 5.0 2.11 2.13 1.51 3.22 U 2.8 2.6 3.25 U NR NR 0.645 J* 2.12 1.83 2.21 2.08 1.99 2.09 1.97 1.84Calcium µg/L -- -- 146,000 196,000 190,000 117,000 65,100 70,100 62,200 NR NR 263,000 51,700 48,600 144,000 124,000 127,000 76,700 62,400 62,600Chromium, total µg/L 100 100 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U NR NR 8.5 3.15 2.76 18.7 18.3 14.8 10.2 2.93 3.16Cobalt µg/L -- 40 0.76 U 0.76 U 0.76 U 0.76 U 0.76 U 0.76 U 0.76 U NR NR 0.841 J* 0.76 U 0.76 U 1.19 J* 0.76 U 3.28 J* 2.58 J* 0.76 U 0.76 UCopper µg/L 1,300 1,000 2.83 U 3.56 U 1.9 U 4.1 U 1.29 U 0.62 U 0.62 U NR NR 2.26 U 3.46 U 2.64 U 2.15 U 5.35 U 10 6.82 3.76 U 3.39 UCyanide µg/L 200 200 3.7 U 3.7 U 3.7 U 5.17 J* 3.7 U 3.7 U 3.7 U NR NR 3.7 U 3.7 U 3.7 U 3.8 U 3.7 U 3.7 U 3.7 U 3.7 U 3.7 UIron µg/L 300 300 1,250 2,050 1,980 1,110 666 864 622 NR NR 2,310 1,830 4,250 2,840 4,120 10,100 6,680 2,660 2,790Lead µg/L 15.0 4.0 2.23 U 2.2 U 4.14 U 2.2 U 2.2 U 3.25 U 2.2 U NR NR 2.2 U 2.2 U 6.02 2.2 U 2.2 U 11.3 6.5 4.08 J* 4.72 J*Magnesium µg/L -- 400,000 39,100 54,900 52,500 30,200 23,000 26,900 21,100 NR NR 81,200 20,000 22,200 51,000 34,300 39,100 29,700 24,500 24,500Manganese µg/L 50 50 77.1 120 114 59.4 60.5 70.1 18.3 NR NR 139 JQ 77 76.9 214 124 244 162 87 89.9Mercury µg/L 2.0 2.0 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U NR NR 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 UNickel µg/L -- 100 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U NR NR 5.38 1.7 U 2.1 J* 12.3 9.96 10.8 6.77 2.05 J* 1.87 J*Potassium µg/L -- -- 2,150 2,660 2,540 2,050 1,680 1,880 1,400 NR NR 4,740 3,150 7,180 5,550 5,750 6,520 10,300 3,990 4,040Selenium µg/L 50 50 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U NR NR 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 USilver µg/L 100.0 34 1.67 U 2.14 U 1.88 U 1.57 U 0.86 U 1.07 U 0.96 U NR NR 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 U 0.65 USodium µg/L -- 120,000 86,800 107,000 102,000 93,400 46,200 41,900 39,800 NR NR 104,000 45,800 89,200 124,000 107,000 53,400 45,400 44,600 44,300Thallium µg/L 2.0 2.0 4.2 U 4.2 U 4.2 U 4.2 U 4.2 U 4.2 U 4.54 U NR NR 6.47 U 5.97 U 4.2 U 4.2 U 5.16 U 4.9 U 4.2 U 7.22 U 4.57 UVanadium µg/L -- 4.5 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U 1.1 U NR NR 1.1 U 1.91 J* 2.14 J* 1.44 J* 1.5 J* 17.3 11.8 1.85 J* 2.16 J*Zinc µg/L 5,000 2,400 6.79 U 15.8 U 11.5 U 25.7 U 3.05 U 10.6 U 41.2 NR NR 5.24 U 10.2 U 23.6 U 10.4 U 11.4 U 24.8 U 19.6 U 12 U 11.3 UpCBSA4-Chlorobenzene Sulfonic Acid µg/L -- 7,300 1 U 280 300 0.83 J* 3 5.3 1 U 300,000 140 4.4 0.8 J* 0.52 J* 59 1 U 1 U 1 U 0.15 J* 0.32 J*Pesticides/PBB/HBB2,4'-DDD µg/L -- -- 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.1 U 0.1 U 0.1 U2,4'-DDE µg/L -- -- 0.1 U 0.1 U 0.1 U 0.1 U 0.1 UJ 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.0016 J* 0.1 U 0.1 U2,4'-DDT µg/L -- -- 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.002 J* 0.1 U 0.1 U4,4'-DDD µg/L -- 9.1 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.1 U 0.1 U 0.1 U4,4'-DDE µg/L -- 4.3 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.1 U 0.1 U 0.1 U4,4'-DDT µg/L -- 3.6 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.0026 J* 0.1 U 0.1 UHexabromobenzene µg/L -- -- 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.1 U 0.1 U 0.1 UHexabromobiphenyl µg/L -- -- 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NR NR 0.11 U 0.1 U 0.1 U 0.11 U 0.12 U 0.1 U 0.1 U 0.1 U 0.1 USVOCs2,4,5-Trichlorophenol µg/L -- 730 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U2,4,6-Trichlorophenol µg/L -- 120 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2,4-Dichlorophenol µg/L -- 73 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2,4-Dimethylphenol µg/L -- 4.4 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2,4-Dinitrophenol µg/L -- -- 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U2,4-Dinitrotoluene µg/L -- 7.7 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2,6-Dinitrotoluene µg/L -- -- 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2-Chloronaphthalene µg/L -- 1,800 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJ2-Chlorophenol µg/L -- 45 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2-Methylnaphthalene µg/L -- 260 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2-Methylphenol (O-Cresol) µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U2-Nitroaniline µg/L -- -- 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U2-Nitrophenol µg/L -- 20 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U3,3'-Dichlorobenzidine µg/L -- 1.1 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U3-Nitroaniline µg/L -- -- 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U4,6-Dinitro-2-Methylphenol µg/L -- -- 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U4-Bromophenyl phenyl ether µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJ4-Chloro-3-Methylphenol µg/L -- 150 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U4-Chloroaniline µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJ

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SVOCs (continued)4-Chlorophenyl phenyl ether µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U4-Methylphenol (P-Cresol) µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 U4-Nitroaniline µg/L -- -- 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 U4-Nitrophenol µg/L -- -- 25.8 UJ 25.6 UJ 25.8 UJ 25.6 UJ 25.6 UJ 25.8 J 26.4 UJ NR NR 25.6 UJ 25.6 UJ 25.4 UJ 26.9 UJ 25.6 UJ 26.3 UJ 26.9 UJ 26.2 UJ 27.8 UJAcenaphthene µg/L -- 1,300 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJAcenaphthylene µg/L -- 52 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UAcetophenone µg/L -- 1500 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UAnthracene µg/L -- 43 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzaldehyde µg/L -- -- 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJBenzo(A)anthracene µg/L -- 2.1 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzo(A)pyrene µg/L 0.2 5.0 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzo(B)fluoranthene µg/L -- 1.5 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzo(G,H,I)perylene µg/L -- 1.0 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzo(K)fluoranthene µg/L -- 1.0 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBenzyl butyl phthalate µg/L -- 1,200 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBiphenyl (Diphenyl) µg/L -- -- 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBis(2-chloroethoxy) methane µg/L -- -- 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBis(2-chloroethyl) ether (2-chloroet µg/L -- 2.0 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBis(2-chloroisopropyl) ether µg/L -- -- 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UBis(2-ethylhexyl) phthalate µg/L -- 6.0 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 4.8 J* 11.1 UCaprolactam µg/L -- 5,800 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJCarbazol µg/L -- 85 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UChrysene µg/L -- 1.6 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDibenz(A,H)anthracene µg/L -- 2.0 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDibenzofuran µg/L -- -- 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDiethyl phthalate µg/L -- 5,500 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDimethyl phthalate µg/L -- 73,000 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDi-n-butyl phthalate µg/L -- 880 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UDi-n-octylphthalate µg/L -- 130 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UFluoranthene µg/L -- 210 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UFluorene µg/L -- 880 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UHexachlorobenzene µg/L -- 1.0 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UHexachlorobutadiene µg/L -- 15 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJHexachlorocyclopentadiene µg/L 50 50 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 R 10.2 R 10.2 R 10.8 R 10.2 R 10.5 R 10.8 R 10.5 R 11.1 RHexachloroethane µg/L -- 7.3 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJIndeno(1,2,3-C,D)pyrene µg/L -- 2.0 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UIsophorone µg/L -- 770 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UNaphthalene µg/L -- 520 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJNitrobenzene µg/L -- 3.4 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UN-nitrosodi-n-propylamine µg/L -- 5.0 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UN-nitrosodiphenylamine µg/L -- 270 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UPentachlorophenol µg/L -- 1.0 25.8 U 25.6 U 25.8 U 25.6 UJ 25.6 U 25.8 U 26.4 UJ NR NR 25.6 U 25.6 U 25.4 U 26.9 U 25.6 U 26.3 U 26.9 U 26.2 U 27.8 UPhenanthrene µg/L -- 52 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UPhenol µg/L -- 4,400 10.3 UJ 10.2 UJ 10.3 UJ 10.2 UJ 10.2 UJ 10.3 J 10.6 UJ NR NR 10.2 UJ 10.2 UJ 10.2 UJ 10.8 UJ 10.2 UJ 10.5 UJ 10.8 UJ 10.5 UJ 11.1 UJPyrene µg/L -- 140 10.3 U 10.2 U 10.3 U 10.2 UJ 10.2 U 10.3 U 10.6 UJ NR NR 10.2 U 10.2 U 10.2 U 10.8 U 10.2 U 10.5 U 10.8 U 10.5 U 11.1 UVOCs --1,1,1-Trichloroethane µg/L 200 200 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U NR NR 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U1,1,2,2-Tetrachloroethane µg/L -- 8.5 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U NR NR 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U1,1,2-Trichloro-1,2,2-Trifluoroethane µg/L -- 170,000 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,1,2-Trichloroethane µg/L 5.0 5.0 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U NR NR 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U1,1-Dichloroethane µg/L -- 880 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U NR NR 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,1-Dichloroethene µg/L 7.0 7.0 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U NR NR 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U 2.9 U1,2,4-Trichlorobenzene µg/L 70 70 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dibromo-3-chloropropane µg/L 0.2 0.2 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dibromoethane (Ethylene Dibro µg/L -- 0.05 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U

MKE\090360007 2


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VOCs (continued)1,2-Dichlorobenzene µg/L 600 600 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,2-Dichloroethane µg/L 5.0 5.0 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U NR NR 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U1,2-Dichloroethylenes µg/L 170 -- 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U NR NR 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,2-Dichloropropane µg/L 5.0 5.0 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U NR NR 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U1,3-Dichlorobenzene µg/L -- 6.6 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U1,4-Dichlorobenzene µg/L 75 75 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U2-Hexanone µg/L -- 1,000 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U NR NR 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 U 4.6 UAcetone µg/L -- 730 12 U 12 U 12 U 12 U 12 U 12 U 12 U NR NR 12 U 12 U 12 U 8.3 J* 12 U 12 U 12 U 12 U 12 UBenzene µg/L 5.0 5.0 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NR NR 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UBromochloromethane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UBromodichloromethane µg/L -- 80 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U NR NR 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 UBromoform µg/L -- 80 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U NR NR 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 U 1.8 UBromomethane µg/L -- 10 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U NR NR 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 U 2.8 UCarbon disulfide µg/L -- 800 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U NR NR 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 U 2.5 UCarbon tetrachloride µg/L 5.0 5.0 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U NR NR 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UChlorobenzene µg/L 100 100 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U NR NR 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UChloroethane µg/L -- 430 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U NR NR 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 U 5.9 UChloroform µg/L -- 80 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U NR NR 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 U 2.4 UChloromethane µg/L -- 260 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U NR NR 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 Ucis-1,3-Dichloropropene µg/L -- -- 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U NR NR 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UCyclohexane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UDibromochloromethane µg/L -- 80 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U NR NR 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 UDichlorodifluoromethane µg/L -- 1,700 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UDimethyl Benzene µg/L -- 280 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U NR NR 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 U 1.7 UEthylbenzene µg/L 700 74 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U NR NR 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 UIsopropylbenzene µg/L -- 800 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethyl Acetate µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 4.6 3.5 U 3.5 U 3.5 U 3.7 3.5 U 3.5 U 3.5 U 3.5 UMethyl Ethyl Ketone (2-Butanone) µg/L -- 13,000 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U NR NR 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 U 7.4 UMethyl Isobutyl Ketone (4-Methyl-2- µg/L -- 1,800 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethylcyclohexane µg/L -- -- 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UMethylene chloride µg/L -- 5.0 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U NR NR 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 U 3.1 UStyrene µg/L 100 100 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U NR NR 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UTetrachloroethene µg/L 5.0 5.0 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U NR NR 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 UToluene µg/L 1,000 790 1 U 1 U 1 U 1 U 1 U 1 U 1 U NR NR 1 U 1 U 0.61 J* 0.33 J* 0.9 J* 1 U 1 U 0.62 J* 0.6 J*trans-1,3-Dichloropropene µg/L -- -- 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U NR NR 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 U 1.5 UTrichloroethene µg/L 5.0 5.0 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U NR NR 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 UTrichlorofluoromethane µg/L -- 2,600 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 UVinyl chloride µg/L 2.0 2.0 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U NR NR 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U 3.5 U

NR = Analysis not requested.NA = Not analyzed (sample bottle broke).NS = Not sampled (well was not operable due to broken pump).U = The analyte was not detected above the method detection limit (MDL) and is, therefore, considered not detected.UJ = Estimated value. The analyte was not detected above the MDL and is deemed biased low as a result of quality control deficiencies.J = The associated numerical value is estimated. No differentiation has been made between values estimated due to the concentration being below the reporting limit and values estimated due to a quality control deficiency.J* = The associated numerical value is the approximate concentration of the analyte in the sample. The value is estimated due to the analyte being detected at a concentration below the reporting limit.JQ = The associated numerical value is estimated due to a quality control deficiency.R = The result is unusable due to deficiencies in the ability to analyze the sample and meet QC criteria.R* = The result is unusable due to problems documented during sample collection. Highlight = exceeds US EPA MCLsBOLD = exceeds MDEQ Part 201 Drinking Water Criteria

Secondary Maximum Contaminant Levels (SMCLs), shown in italics, are non-enforceable guidelines for constituents that may cause cosmetic or aesthetic effects, such as offensive taste, odor, color or staining.

MKE\090360007 3

TABLE 9 pCBSA Summary Table Velsicol Chemical/Pine River Superfund Site, OU1

Well 9/21/2004 5/11/2005 4/3/2006 7/11/2006 8/24/2006 10/24/2006 11/28/2006 12/21/2006 1/23/2007 2/21/2007 3/14/2007

CW-1 97 81 110 130 140 79 140 60 50 1 U 95

CW-4 NT 180 120 180 180 290 400 370 350 280 460

CW-5 NT 1 U 0.84 J* 2.9 0.16 J* 0.76 U 0.83 J* 1 0.88 J* 0.83 J* 0.65 J*

CW-6 2 U 1 U 0.49 J* 1.7 0.7 J* 1.4 U 1.2 1.8 2.6 3 4.4

CW-7 22 32 4.5 6.4 4.6 1 U 7.7 12 5.8 5.3 6.7

CW-8 7 1 U 1 U 0.48 J* 0.58 J* 1 U 1 U 1 U 1 U 1 U 1 U

MW-30I NT 360,000 NT 320,000 NT 200,000 1 U NT NT 300,000 380,000

MW-30D NT 65 NT 64 NT 1 U 670 NT NT 140 480

MSW-35D3

Sentry monitoring well installation completed in February 2007

0.8 J* 1 U

MSW-36D4 0.52 J* 0.33 J*

MSW-38D4 59 150

MSW-5 1 U 1 U

MSW-6 1 U 1 U

MSW-7 1 U 1 U

MSW-8 0.15 J* 0.32 J*

MW-31D4 4.4 1 U

MKE\090360007 1

Figures

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CITY WELL #6

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CITY WELL #7

CITY WELL #5

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MW-35D3

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MSW-7

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MW-31D4

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FIGURE 1SENTRY WELL LOCATION MAP

VELSICOL / PINE RIVER SITEST. LOUIS, MICHIGAN

NOTES:

1. BASE MAP PROVIDED BY WESTON SOLUTIONS OF MICHIGAN, INC.2. LAND SURVEY ELEVATIONS WERE REFERENCED TO NAVD OF 1988 FEET MSL. THE HORIZONTAL LOCATIONS WERE REFERENCED TO THE MICHIGAN STATE PLANE COORDINATE SYSTEM NAD83, INTERNATIONAL FEET - SOUTH (2113) ZONE.

Legend

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File Path: E:\Velsicol\GIS_Data\Velsicol\MXDs\Vel_Sentry_Well_Location_Map_Vector.mxd, Date: 06 12, 2007, User: Rvanslambrouck

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FIGURE 2CROSS SECTION LOCATION MAP

VELSICOL / PINE RIVER SITEST. LOUIS, MICHIGAN

NOTES:

1. BASE MAP PROVIDED BY WESTON SOLUTIONS OF MICHIGAN, INC.2. LAND SURVEY ELEVATIONS WERE REFERENCED TO NAVD OF 1988 FEET MSL. THE HORIZONTAL LOCATIONS WERE REFERENCED TO THE MICHIGAN STATE PLANE COORDINATE SYSTEM NAD83, INTERNATIONAL FEET - SOUTH (2113) ZONE.

Legend

")A City Water Supply Well

&< Existing Monitoring Well


Cross Section

A - A'

B - B'

C - C'

0 700350Feet

³

File Path: E:\Velsicol\GIS_Data\Velsicol\MXDs\May 2007\Figure05_Vel_CrossSection.mxd, Date: 06 12, 2007 4:29:24 PM, User: Rvanslambrouck

GW- Well-graded gravels, gravel-sand mixtures, little or no fines

GP- Poorly-graded gravels, gravel-sand mixtures, little or no fines

GM- Silty gravels, gravel-sand-silt mixtures

GC- Clayey gravels, gravel-sand-clay mixtures

SW- Well-graded sands, gravelly sands, little or no fines

SP- Poorly graded sands, gravelly sands,little or no fines

SM- Silty sands, sand-silt mixtures

SC- Clayey sands, sand-clay mixtures

ML- Inorganic silts and very fine sands, rock flour, silty of clayey fine sands or clayey silts with slight plasticity

CL- Inorganic clays of low to medium plasticity, gravelly clays, sandy clays,silty clays, lean clays

CH- Inorganic clays of high plasticity, fat clays

amsl- Above mean sealevel

pCBSA- Para-Chlorbenzene Sulfonic Acid

VE- Vertical Exaggeration

- Sand Mixtures

- Isolation Casing

- Well Screen

USCS Classifications

ES052007003MKE Legend_rev2 6-21-07 ag

FIGURE 3Conceptual Geologic Cross Section LegendVelsicol Pine River SiteSt. Louis, MI

elacS latnoziroH

elacS latnoziroH : lacitreV

Elevation in feet above mean sea level

:110

tf 0050

Adapted from Figure 3-2, URS 2001

Fill

Peat

Clay

Silt

Sand

Groundwater Elevation

Conceptual CPT sampling location to minimum (solid line) and possible (dashed line) depths, depending on field conditions

LEGEND

Note: Residential and Commercial (R&C) Drinking Water Criteria for Chloride is 250 mg/L. Groundwater Surface Water Interface (GSI) Criteria for Total Dissolved Solids (TDS) is 500 mg/L.

ES052007003MKE Geologic X-sec_A-A’_rev10 5-7-07mjl

FIGURE 4Conceptual Geologic Cross Section A-A’Sentry Well InstallationVelsicol Pine River SiteSt. Louis, MI

750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500

750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500

63 34 MW

-3

CPT

-B

Pere Marquette Lake

58

CW-8

MSW-8

ClaySP

SP

SW

CL

CL

CL

CL

CL

SP

SW

CL

SC

SM

SM

SC

Shallow Unit Shallow Unit

CL

Gravel/Rock

Clay, gravelly with rocks

Sand

Clay,some stones

Sand, gravel rocks

Hydrostratigraphic Units

I-Zone

Lower I-Zone

D-Zone

D2-Zone

City Well Intake Zone (CW-6, CW-7)

City Well Intake Zone (CW-1, CW-4, CW-5,

CW-8)

Gravel,coarse

Clay, gravelly

Clay with rocksGravel, large with rocks

Clay with rocks

Gravel, medium rocks & clay lenses

Clay

Sand, fine

Clay

3/14/07pCBSA =<1 ug/L

01/03/07pCBSA = 26 ug/L

CL

CL

ML

CL

CL

CL

ML

ML

ML

ML

ML

ML

ML

ML

CL

CL

CL to 465’amsl

GM, dry

SP

SP

SP

SP

SP wet

SW

SW

SM

SM

SM

SP/SC

GP/GC

SPSW

SW

SM

SPPine River

DredgedSediment

SP

ML

ML

ML

ML

SM

SM

SM

SW

ML

SP

SC

SW

ML, moist

SM

SC, dry, hard

11/27/06 pCBSA = 420,000 ug/L

2/15/07 pCBSA = 2.3 ug/L

CL

ML

ML

ML

ML

SP

SP

ML

CL

CL/ML

CLSPCL

SW

11/29/07 pCBSA = <1 ug/L

SW

SWCL

CL

ML

ML

ML

SM

GP

SP

CL

SC

SP

sw11/28/07

pCBSA = 94 ug/L

3/14/07pCBSA=ND ug/L

ML

CL

CL

ML

SM

SP

SP

SP

SW

SW

ML

CL

GP

SP/SM

1/4/07pCBSA=74 ug/L

2/15/07 pCBSA = 7.2 ug/L

2/15/07 pCBSA = 6.3 ug/L

1/11/07pCBSA =1.7 ug/L

1/11/07pCBSA =1.7 ug/L

3/14/07pCBSA=<1 ug/L

1/25/07 pCBSA =18 ug/L

Sand & gravel,medium

MW-31D4

MW-38D4MW-35D3

MW-36D4

MSW-7CW-7

South EastA

North EastA’

Ele

vatio

n (fe

et a

msl

)

Ele

vatio

n (fe

et a

msl

)

1,100(2,100)

CPT

-A

CPT

-A

Hard, sandy clay & boulders

Hard, clay & boulders

Hard, clay, gravelly and

rocks

Sand, gravel, clay-strippy

Sand &fine gravel

Clay & gravel

Sandy clay,soft

Fine sand

Sand, some gravel

Boulders

Boulders

BouldersClay

Sand, gravel

Shall

ow U

nit

Inte

rmed

iate U

nit

Lowe

r Uni

t

3/14/07pCBSA =0.32 J ug/L

2/6/2007pCBSA=2.8 ug/L


12/4/06pCBSA =1.2 ug/L

12/4/06pCBSA =4.6 ug/L

12/21/06pCBSA =32 ug/L

1/11/07pCBSA =30 ug/L

1/25/07pCBSA =23 ug/L

1/25/07pCBSA =22 ug/L

3/14/07pCBSA =150 ug/L

2/16/07pCBSA = 5.0 ug/L

1/15/07pCBSA = 5.4 ug/L

3/14/07pCBSA = .33J

2/15/07pCBSA = 1.3

02/15/07pCBSA = 0.62J ug/L

1/10/07pCBSA = 1.1 ug/L


3/14/07pCBSA =6.7 ug/L

1” = 500’VE = 20

1” = 25

SP

ES052007003MKE Geologic X-sec_B-B’_rev9 1-5-09 ag/mjl

FIGURE 5Conceptual Geologic Cross Section B-B’Sentry Well InstallationVelsicol Pine River SiteSt. Louis, MI

ES052007003MKE Geologic X-sec_B-B’_rev9 1-5-09 ag/mjl

FIGURE 5Conceptual Geologic Cross Section B-B’Sentry Well InstallationVelsicol Pine River SiteSt. Louis, MI

750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500

750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500

CW-8

MSW-8

Clay SP

SP

SW

CL

CL

CL

CL

CL

SP

SW

CH

SC

SM

SM

SC

Shallow Unit Shallow Unit

CL

Gravel/Rock

Clay, gravelly with rocks

Sand

Clay,some stones

Sand, gravel rocks


I-Zone

Lower I-Zone

D-Zone

D2-Zone



CW-8)

Gravel,coarse

Clay, gravelly

Clay with rocksGravel, large with rocks

Clay with rocks

Gravel, medium rocks & clay lenses

Clay

Clay

Sand, fine


3/14/07pCBSA=0.32 J ug/L

12/5/06pCBSA=<1 ug/L Dredged

Sediment

3/14/07pCBSA=6.7 ug/L3/14/07

pCBSA=4.4 ug/L

CL

CL

ML

SM

GW

ML

3/14/07pCBSA=460 ug/L

2/6/07pCBSA=2.8 ug/L

Sand & gravel,medium

MSW-6CW-6

CW-7

South EastB

North EastB’

Ele

vatio

n (fe

et a

msl

)

Ele

vatio

n (fe

et a

msl

)

Hard, sandy clay & boulders

Hard, clay & boulders

Hard, clay, gravelly with

rocks

Sand, gravel, clay-strippy

Sand &fine gravel

Clay & gravel

Sandy clay,soft

Fine sand

Sand, some gravel

Boulders

Boulders

BouldersClay

Sand, gravel

Shall

ow U

nit

Inte

rmed

iate U

nit

Lowe

r Uni

t

SC

SCCLSW

NO RECOVERY

ML

CL

CL

ML Clay

Sand

Sand w/ clay, wet

Clay1/5/07pCBSA=120 ug/L

11/29/07pCBSA=390 ug/L

SW

ML

SP

SP

SP

SPML

ML

ML

ML

ML

ML

ML

ML

SP

SP

ML,wet

ML,wet

SP

SP

SP/SM

SP

SW

CLSM

CL

SP

ML

ML

MLSW

SW

WM

W-3

0D

CW-1

CW-4

Sand & Gravel

Sand & Clay(Fine)

Sand & Clay(Fine)

Clay & Stones

Sand & Clay (Fine)

Clay & Stonesw/ Sand

Sand

3/14/07pCBSA=95 ug/L

3/14/07pCBSA=< 1 ug/L

SP

MSW-5CW-5

CL

SW

3/14/07pCBSA=0.65J ug/L

Sand w/ Gravel

Sand Fill

Sandy Clay

Sand

Sandy Clay

Silty Sand

Clay



Sand & Clay (Soft)

1/3/07pCBSA=26 ug/L

3/14/07pCBSA=< 1 ug/L

11/30/07pCBSA=< 1 ug/L

1” = 500’VE = 20

1” = 25


10/5/05pCBSA=170,000 ug/L

10/5/05pCBSA=1,100 ug/L

SW

Clay

elacS latnoziroH

elacS latnoziroH : lacitreV

Elevation in feet above mean sea level

:110

tf 0050

Adapted from Figure 3-2, URS 2001

Fill

Peat

Clay

Silt

Sand

Groundwater Elevation

Conceptual CPT sampling location to minimum (solid line) and possible (dashed line) depths, depending on field conditions

LEGEND

Note: Residential and Commercial (R&C) Drinking Water Criteria for Chloride is 250 mg/L. Groundwater Surface Water Interface (GSI) Criteria for Total Dissolved Solids (TDS) is 500 mg/L.

ES052007003MKE Geologic X-sec_C-C’_rev8 6-21-07 ag

FIGURE 6Conceptual Geologic Cross Section C-C’Sentry Well InstallationVelsicol Pine River SiteSt. Louis, MI


750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500

750

740

730

720

710

700

690

680

670

660

650

640

630

620

610

600

590

580

570

560

550

540

530

520

510

500


I-Zone

Lower I-Zone

D-Zone

D2-Zone



CW-8)

3/14/07pCBSA=6.7 ug/L

CL

CL

ML

SM

GW

ML

3/14/07pCBSA=460 ug/L

MSW

-6

CW-1

CW-4

WM

W-3

0D

WM

W-3

8D

WM

W-2

2D

WM

W-4

0D

WM

W-4

1D

WM

W-4

2D

WM

W-1

9D2

WM

W-3

7D

MW

-38D

4

WestC

EastC’

Ele

vatio

n (fe

et a

msl

)

Ele

vatio

n (fe

et a

msl

)

Sand w/ Clay wet

Clay

Sand &fine gravel

Clay & gravel

Shall

ow U

nit

Inte

rmed

iate U

nit

Lowe

r Uni

t

SC

SCCLSW

NO RECOVERY

ML

CL

CL

ML


11/29/07pCBSA=390 ug/L

SW

SPSP

SP

SP

SM

SM

SM

SM

SW

SP

SC

SW

ML

ML

Sand & Gravel

Sand & Clay(Fine)

Sand & Clay(Fine)

Sand & Clay(Fine)

Clay & Stones

Clay & Stonesw/ Sand

Sand


3/14/07pCBSA=< 1 ug/L

CW-6

ML

ML

ML

ML

SC, dry hard

ML10/5/05

pCBSA=170,000 ug/L

ML

ML

ML

ML

SP

SW

SW

SW

11/27/06pCBSA=420,000 ug/L

10/6/05pCBSA=1100 ug/L

10/5/05pCBSA=1.3 ug/L

3/14/07pCBSA=150 ug/L

2/16/07pCBSA=5.0 ug/L

2/15/07pCBSA=6.3 ug/L

2/15/07pCBSA=7.2 ug/L

2/15/07pCBSA=2.3 ug/L

ML

ML

ML

FillML

FillML

ML

ML

ML

SP

SP

SPSP

SP

SP

SWSW

SC

SM

SM

CL

ML

10/13/05pCBSA=13 ug/L

10/14/05pCBSA=10 ug/L

10/12/05pCBSA=70 ug/L

10/12/05pCBSA=3000 ug/L

ML

MLSW

SM/ML/SWSM/SP

SW

SW

ML

ML

MLSM

SM10/13/05

pCBSA=6.3 ug/L

10/12/05pCBSA=<4 ug/L

SPMLSP

SP

MLSP

SPGW

ML

ML

SPSPSP

CLCLCL

CL

CL

10/11/05pCBSA=<1 ug/L

10/14/05pCBSA=2.6 ug/L

10/14/05pCBSA=<1 ug/L

10/11/05pCBSA=2400 ug/L

ML

MLSP

SP

ML

MLFill

SW

SW

SM

SM

SPSP

CL

SW/GW

ML

ML

MLMLML

ML

ML

SM/SW

SW

SWSMSM

10/11/05pCBSA=1600 ug/L

SP

ML

CLCLGPSM

SW

SW

GW

SPCL

10/11/05pCBSA=2200 ug/L

10/13/05pCBSA=330 ug/L




10/13/05pCBSA=24,000 ug/L

10/13/05pCBSA=450 ug/L

SPSP

SPML

SP

SW

ML

ML

ML

ML

SP

SP

SP

10/6/05pCBSA=< 1 ug/L

ML

SP

10/13/05pCBSA=2600 ug/L

1” = 500’VE = 20

1” = 25

10/5/05pCBSA=3500 ug/L

!A

!A

!A

!A

!A!A

!A

!A

13,0

59,5

00 E

13,0

59,0

00 E

13,0

58,5

00 E

13,0

58,0

00 E

13,0

57,5

00 E

13,0

57,0

00 E

13,0

56,5

00 E

13,0

55,5

00 E

13,0

56,0

00 E

695,500 N

696,000 N

696,500 N

C

697,500 N

698,000 N698,000 N

695,500 N

696,000 N

696,500 N

697,000 N

697,500 N

§A

§A

§A

§A

§A CITY WELL #6

CITY WELL #7

CITY WELL #5

CITY WELL #4

CITY WELL #1

MW-35D3698.42

MSW-6698.08

MSW-7698.77

MSW-8702.26

MSW-5697.75

MSW-38D4698.81

MW-31D4698.97

MSW-36D4698.80

699.0

699.5

700.0700.5

701.0701.5

702.0

698.0698.5

699.0699.5

700.0700.5

701.0701.5

702.0

698.0

698.

5

698.5

698.5

C

B

A

FIGURE 7Potentiometric Surface Map

February 26, 2007VELSICOL / PINE RIVER SITE

ST. LOUIS, MICHIGAN

Legend

§A City Water Supply Well


0 700350Feet

³

NOTES:

1. BASE MAP PROVIDED BY WESTON SOLUTIONS OF MICHIGAN, INC.2. LAND SURVEY ELEVATIONS WERE REFERENCED TO NAVD OF 1988 FEET MSL. THE HORIZONTAL LOCATIONS WERE REFERENCED TO THE MICHIGAN STATE PLANE COORDINATE SYSTEM NAD83, INTERNATIONAL FEET - SOUTH (2113) ZONE.3. GROUNDWATER ELEVATION MEASUREMENTS COMPLETED BY CH2M HILL - FEBRUARY 26, 2007.

File Path: E:\GIS\Misc_projects\Velsicol\Reports\Feb_2007\MapFiles\Vel_Sentry_Well_Location_Map_February2007_GW_contours.mxd, Date: 06 12, 2007, User: RVanslambrouck

Groundwater Flow Direction

13,0

59,5

00 E

13,0

59,0

00 E

13,0

58,5

00 E

13,0

58,0

00 E

13,0

57,5

00 E

13,0

57,0

00 E

13,0

56,5

00 E

13,0

55,5

00 E

13,0

56,0

00 E

695,500 N

696,000 N

696,500 N

C

697,500 N

698,000 N698,000 N

695,500 N

696,000 N

696,500 N

697,000 N

697,500 N

CITY WELL #6

CITY WELL #8

CITY WELL #7

CITY WELL #5

CITY WELL #4

CITY WELL #1

MW-35D3698.92

MSW-6699.50

MSW-7698.73

MSW-8700.80

MSW-5698.40

MSW-38D4698.59

MW-31D4699.32

MSW-36D4701.27*

699.0

699.5

700.0

700.5

698.0698.5

699.5

699.00

700.0700.5

698.0

698.5

C

B

A

FIGURE 8Potentiometric Surface Contour Map

April 9, 2007VELSICOL / PINE RIVER SITE

ST. LOUIS, MICHIGAN

* GROUNDWATER ELEVATION APPEARS ANOMOLOUS AND WAS NOT USED TO GENERATE CONTOURS.

LegendCity Water Supply Well

Sentry Monitoring Well

0 700350Feet

NOTES:

1. BASE MAP PROVIDED BY WESTON SOLUTIONS OF MICHIGAN, INC.2. LAND SURVEY ELEVATIONS WERE REFERENCED TO NAVD OF 1988 FEET MSL. THE HORIZONTAL LOCATIONS WERE REFERENCED TO THE MICHIGAN STATE PLANE COORDINATE SYSTEM NAD83, INTERNATIONAL FEET - SOUTH (2113) ZONE.3. GROUNDWATER ELEVATION MEASUREMENTS COMPLETED BY CH2M HILL - APRIL 9, 2007.

Groundwater Flow Direction

MKE \\WAVE\PROJ\MISC_PROJECTS\VELSICOL\REPORTS\FEB_2007\MAPFILES\VEL_SENTRY_WELL_LOCATION_MAP_APR2007_GW_CONTOURS1.MXD 1/2/2009 11:03:57

(a) Plan view

(b) Oblique view

Figure 9. Snapshots of EVS model showing extent of 100 μg/l pCBSA plume.

(a) Plan view

(b) Oblique view

Figure 10. Snapshots of EVS model showing extent of 7,300 μg/l pCBSA plume.

Appendix A Isolation Casing and Sentry

Monitoring Well Installation

1

APPENDIX A

Isolation Casing and Sentry Monitoring Well Installation

The following text describes installation of the isolation casings and sentry monitoring wells, and monitoring well development. The sentry wells were installed in general accordance with the Sentry Well Plan (CH2M HILL, July 2006). Water used to complete drilling activities was obtained from the City of Saint Louis municipal water supply system. Deviations from the Sentry Well Plan are discussed below.

Isolation Casing Installation A pilot hole was advanced using a rotosonic drilling method in either three or four stages at each well location using a 4-inch core barrel with a 6-inch override casing. The number of stages depended on the subsurface conditions observed by the CH2M HILL geologist. After the completion of each pilot hole stage, a temporary bentonite seal was set to eliminate the potential of downward contamination migration. The borehole was subsequently reamed out using dual rotary drilling techniques, which allows simultaneous advancement of a temporary isolation casing and the operation of the reaming drill bit. Once the temporary casing and reaming bit reached the desired depth, the down-hole tooling was removed from the temporary casing and the permanent casing was lowered into the borehole inside the temporary casing. The annular space was then grouted using a pressure-pumped, side-discharge tremie method as the temporary casing was removed.

Drilling was completed in stages as follows:

• Stage 1 – Pilot and First (20-inch) Isolation Casing—The pilot core barrel and override casing were advanced to depths ranging between approximately 35 and 56 feet bgs. This corresponded to a depth below the bottom of the Intermediate Unit. The pilot hole was reamed to the diameter shown on the individual well construction detail, and the first isolation casing was installed and sealed with grout.

• Stage 2 – Pilot and Second (14 inch) Isolation Casing—The pilot core barrel and override casing were advanced to a depth ranging between approximately 68 and 95 feet bgs. The pilot hole was reamed to the diameter shown on the individual well construction detail and the second isolation casing was installed and sealed with grout.

• Stage 3 – Pilot and Third (7 or 8 inch) Isolation Casing—The pilot core barrel and override casing were advanced to a depth ranging between approximately 126 and 196 feet bgs. The pilot hole was reamed to the diameter shown on the individual well construction detail and the third isolation casing was installed and sealed with grout. The third isolation casing was not installed at MSW-6, MSW-7, and MW-35D3 because no sand/gravel units were encountered between the end of the second stage pilot hole and the target monitoring depth for each location.

APPENDIX A—ISOLATION CASING AND SENTRY MONITORING WELL INSTALLATION

2

• Stage 4 – Pilot to Total Depth— The pilot core barrel and override casing were advanced to the total well depth at each location, ranging between approximately 137 and 210 feet bgs. Reaming was not required for the Stage 4 borehole. For each location, monitoring well construction commenced immediately upon reaching the total depth of the borehole.

Each isolation casing consisted of 20, 14, 8, or 7 inch diameter, decontaminated carbon steel casing and was completed in the following manner:

• The permanent casing was installed by welding on 20-foot-long sections and then lowering the casing in the borehole until the desired bottom depth was reached.

• The annular space was filled with a cement-bentonite grout seal. The grout was pumped into the annular space through a tremie pipe and the temporary casing was removed from the borehole in 20-foot-long sections. This process was done until grout was observed at the ground surface.

• The grout seal cement consisted of Portland cement conforming to ASTM C-150, Type 1. The maximum allowable water content of the grout mix was 10 gallons per 94-pound bag of cement. Certified clean bentonite, free of acetone or other environmental contaminants, was utilized with a maximum of 6 pounds of bentonite per 94-pound bag of cement. The bentonite and cement were thoroughly mixed using a mechanical grout mixing device.

• In order to avoid creating lumps of bentonite in the grout, adding bentonite to mixed grout was not permitted. The grout was mixed thoroughly before placing it in the borehole and allowed to cure a minimum of 72 hours prior to further drilling.

• A mud scale was used to demonstrate that the cement-bentonite grout returning at the ground surface was within 3 percent of the weight of the cement-bentonite grout being pumped into the borehole. This ensured that significant grout dilution by groundwater was not occurring.

• If any grout settlement occurred during the cure period, additional grout was placed from the top of the settled grout column to the ground surface using a tremie method. The final cured grout seal extended from the bottom of the borehole to approximately 1 foot bgs.

Deviations from the drilling activities proposed in the Sentry Well Plan are discussed below.

• Based on the geology observed during the completion of the Stage 3 pilot hole, a third isolation casing was not required at MSW-6, MSW-7, and MW-35D3. The subsurface below the second isolation casing at these locations consisted of dry, hard to stiff clayey silt (glacial till) that extended down to the target monitoring depth. This clayey silt did not require isolation; therefore, a third isolation casing was not installed.

• Based on the geology observed during completion of the Stage 3 pilot hole at MW-38D4, the well screen could not be set in the lower CWIZ. A silt lens was encountered in the upper CWIZ (refer to Figure 4, Conceptual Geologic Cross Section A-A’) that required installation of the third isolation casing, therefore, the well screen was set in the upper CWIZ.


3

• The lower CWIZ was not encountered at MW-31D4. The soil boring was completed to a depth of approximately 246 feet bgs without encountering a granular unit corresponding to the lower CWIZ. Therefore, the well screen was set in the upper CWIZ.

• Eight-inch-diameter steel casings were installed as the third stage isolation casings at MSW-5 and MW-31D4 by Kelley using dual rotary methods. The drilling method was modified during the field work such that the third isolation casing could be installed using sonic drilling methods. The drilling method modification was discussed with both USEPA and the MDEQ prior to implementation. The drilling modification required using 7-inch isolation casing instead of 8-inch casing as specified in the Sentry Well Plan. Therefore, 7-inch-diameter casing was used as the third stage isolation casing at MSW-8, MW-36D4, and MW-38D4.

The depths of each isolation casing are summarized on Table A-1.

Monitoring Well Construction and Development Once the pilot hole had been advanced to the target depth at each drilling location, monitoring well construction was performed immediately. Each monitoring well was constructed of the appropriate length Schedule 40, 2-inch-diameter polyvinyl chloride (PVC) well casing and screen. The well screens consisted of 10-slot, Schedule 40 PVC. They were sized to approximately equal the screen of the city well with which the sentry well was paired or the thickness of the saturated zone encountered, whichever was less. The sentry well screen lengths ranged from 5 to 30 feet; individual well screen lengths are listed on Table 1. The filter pack consisted of properly sized and graded, thoroughly washed, sound, durable, well-rounded silica sand. The filter pack was installed by slowly pouring the sand into the annular space while simultaneously raising the override casing and using a weighted tape to sound for the sand surface.

The annular well seal consisted of at least 2 feet of pelletized bentonite clay placed above the filter pack. The bentonite was poured into the annular space while slowly raising the override casing while sounding for the top of the bentonite with a weighted tape. Once the annular seal was placed, the wells were grouted with a cement-bentonite grout seal. The grout was pumped into the annular space using a pressure-pumped, tremie method, and forced into the annular space until it was observed at the ground surface. The final cured grout seal extended from the bottom of the borehole to approximately 1 foot bgs.

The wells were completed with a flush-mount manhole cover. A 2-foot by 2-foot concrete pad was constructed around the manhole cover. All sentry monitoring wells were surveyed following installation.

Initial well development was completed by the airlift method. Approximately 100 gallons of water were removed from each sentry monitoring well and development continued until the water produced was free of turbidity based on the judgment of the field geologist.

Subsequent to well installation and development, dedicated sampling pumps were installed in the sentry monitoring wells. Geotech Model # 1.66 air bladder pumps were installed by CH2M HILL personnel on April 9, 2007. The intake elevations of the dedicated sampling pumps were set at the screen mid-point at each sentry well. At each monitoring well, the


4

sample tubing was cut a few feet below the well cap and was reconnected using a friction coupling. The coupling can be undone to allow water to drain from the top few feet of tubing after sampling in the winter months to prevent freezing of the line. Lockable caps were installed at the top of all sentry monitoring wells.

Elevated pH measurements were noted at MSW-6 and MSW-7 during the initial groundwater sampling events; these wells were redeveloped using a submersible pump in March 2007 and May 2007. Field groundwater quality parameters (including pH, specific conductance, turbidity, temperature, dissolved oxygen, and oxidation reduction potential) were measured during the development process, but well development continued beyond parameter stabilization. An additional 180 gallons of water was removed from MSW-6 and approximately 800 gallons of water were removed from MSW-7.

The construction details for the sentry monitoring wells are attached and are summarized in Table A-2.

Boring Number:

Client:

Project:

Location:

Northing:

Drilling Contractor:

Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Elevation:Easting:

Sample Information Soil Description Comments

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol

Soil Name, USCS Group Symbol, Color,Moisture Content, Relative Density or

Consistency, Soil Structure, Mineralogy

Ele

va

tio

n (

ft

am

sl)

Tests, Sampling,Instrumentation, and Air

Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245

Prosonic Corporation/Kelly Well Drilling

Rotasonic/Foremost DR-24

J. Meyer, S. Pratt, M. Gwynn

11/30/2006 - 02/01/2007

721.7513059234.19

S-1

S-2

S-3

S-4

S-5

0-7

7-17

17-27

27-37

37-47

7/7

11/10

11/10

11/10

10/10

Ground Surface

Poorly Graded Sand (SP)medium-fine, trace fine gravel, brown, moist, loose

Poorly Graded Sand with Gravel (SP)brown, moist, loose, sand medium-fine, gravel fine

Lean Clay (CL)trace fine gravel, gray, moist medium

Silt (ML)trace fine gravel, gray, moist, hard

Poorly Graded Sand (SP)medium-fine, gray, wet, loose, trace fine gravel

Silt (ML)trace fine gravel, gray, dry, hard

As above

As above

Poorly Graded Sand (SP)medium-fine, brown, wet, loose

Lean Clay (CL)brown, moist, stiff

Silty Sand (SM)brown, wet, loose

722

715

710

705

700

695

690

685

680

675

PID not functioning.

Purged 10 gallons. Will not produce, no sample.

Purge 25 gallons, collect sample #07CV08-25 from 42-47' bgs.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-6

S-7

S-8

S-9

S-10

47-56

56-68

68-78

78-88

88-98

10/10

12/12

10/10

9.5/10

10/10

Silt (ML)gray, moist, stiff


Well Graded Sand (SW)gray, wet, loose, gravel fine-coarse

Lean Clay (CL)gray, very stiff, moist

Lean Clay (CL)gray, very stiff, some silt, dry

Poorly Graded Sand (SP)medium-fine, with some silt and clay, gray, wet

Silt (ML)gray, stiff, moist, grading to dry, trace fine sand, some clay

Silt (ML)gray, very stiff, dry

Poorly Graded Sand with Silt (SP/SM)sand with some silt, moist, gray, loose

Silt (ML)gray, very stiff, some clay

Silt (ML)gray, some clay, very stiff, dry

As above, dry

As above, dry

670

665

660

655

650

645

640

635

630

625

End pilot hole #1 on 11/30/2006. Complete 20" isolation casing on 12/10/2006.

Purge 35 gallons. Will not produce, no sample collected.

Will not produce.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-11

S-12

S-13

S-14

S-15

98-108

108-118

118-128

128-138

138-148

9/10

9/10

10/10

10/10

10/10

Silt (ML)some clay, moist to wet, gray, medium stiff

Silt (ML)light brownish gray, some clay, little fine sand to fine gravel, very stiff, dry,

Silt (ML)gray, little clay, medium stiff to stiff, moist to dry

Silt (ML)medium stiff., saturated 118-120' bgs, moist 120-123' bgs, gray

Silt (ML)trace to little fine sand, medium stiff, saturated 125-126', moist 126-128 and 123-126', gray

Poorly Graded Sand (SP)fine, little silt, loose to medium dense, moist 132-137', saturated 128-132', gray

Silt (ML)little clay, stiff, dry, gray

Sand (SP)fine, trace silt, loose, moist, gray

Silt (ML)gray, little clay, stiff, moist, thin layers of fine sand throughout

Silt (ML)gray, little clay, very stiff, moist

Silt (ML)gray, moist to wet silt and fine sand, firm

620

615

610

605

600

595

590

585

580

575

Purge 5 gallons from 118-128 feet. Collect sample #07CV08-52.



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-16

S-17

S-18

S-19

S-20

148-157

157-167

167-177

177-187

187-197

9/9

10/10

10/10

8/10

5/10

Silt (ML)gray, stiff, slightly moist with little to trace fine sand

As above

Poorly Graded Sand (SP)greyish brown, fine-medium, wet, loose

Poorly Graded Sand (SP)grayish brown, fine-medium, wet, loose

Poorly Graded Sand (SP)grayish brown, medium, some fine, wet, loose

As above

570

565

560

555

550

545

540

535

530

525

Will not support pumping.

Purged 68 gallons. Collect sample #07CV08-80.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-21

S-22

197-207

207-217

10/10

10/10

Well Graded Sand (SW)grayish brown, medium-coarse, some gravel, wet, loose

As above

End of Boring

520

515

510

505

500

495

490

485

480

475

Complete monitoring well on 02/01/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-1

S-2

S-3

S-4

S-5

0-7

7-17

17-27

27-37

37-47

7/7

11/10

11/10

11/10

10/10

Ground Surface







As above

As above




722

715

710

705

700

695

690

685

680

675

PID not functioning.

Purged 10 gallons. Will not produce, no sample.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-6

S-7

S-8

S-9

S-10

47-56

56-68

68-78

78-88

88-98

10/10

12/12

10/10

9.5/10

10/10












As above, dry

As above, dry

670

665

660

655

650

645

640

635

630

625


Purge 35 gallons. No sample collected.

Will not produce.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-11

S-12

S-13

S-14

S-15

98-108

108-118

118-128

128-138

138-148

10/10

10/10

10/10

9/10

9/10












620

615

610

605

600

595

590

585

580

575




Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-16

S-17

S-18

S-19

S-20

148-157

157-167

167-177

177-187

187-197

9/9

10/10

10/10

8/10

5/10


As above




As above

570

565

560

555

550

545

540

535

530

525

Will not support pumping.

Purged 68 gallons. Collect sample #07CV08-80.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-5

USEPA Region 5

Velsicol

St. Louis

696197.245




11/30/2006 - 02/01/2007

721.7513059234.19

S-21

S-22

197-207

207-217

10/10

10/10


As above

End of Boring

520

515

510

505

500

495

490

485

480

475


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

697585.683




11/29/2006 - 02/20/2007

728.59113059724.26

S-1

S-2

S-3

S-4

S-5

0-7

7-17

17-27

27-37

37-47

7/7

11/10

11/10

12/10

13/10

Ground Surface

Sandy Lean Clay with Gravel (CL)brown, moist, medium, fine gravel

Lean Clay (CL)brown, moist, medium

Lean Clay (CL)brown, moist, medium, fine gravel

Lean Clay (CL)gray, trace fine gravel, moist, medium

As above, hard at 25.5-26'

Well Graded Sand (SW)gray, trace fine gravel, moist, hard

Lean Clay (CL)gray, trace fine gravel, moist, hard

Lean Clay (CL)gray, dry, hard, trace fine-coarse gravel

Lean Clay (CL)gray, moist, stiff

Clayey Sand with Gravel (SC)brown, moist, loose

729

725

720

715

710

705

700

695

690

685

680

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

Purge 30 gallons from 26-26.5' bgs. Collect sample #07CV08-22.

PID not functioning correctly.

Install 20" isolation casing on 12/15/2006.

End pilot hole #1 on 11/29/2006.

PID = 0.0

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

697585.683




11/29/2006 - 02/20/2007

728.59113059724.26

S-6

S-7

S-8

S-9

S-10

47-58

58-68

68-77

77-87

87-97

10/10

10/10

1/11

10/10

9/9

poor recovery - rock plugged core barrel. Ended in clay.

Well Graded Sand with Gravel (SW)fine gravel, gray, wet, loose

Lean Clay (CL)gray, moist, some sand and trace gravel

Clayey Sand (SC)fine, with trace gravel, moist

Silt with Sand (ML)some fine sand, dry, hard, gray

Silt with Sand (ML)some fine sand and clay, dry, hard

Silt (ML)brownish gray, clayey, hard, dry, trace gravel

As above

As above

Lean Clay (CL)brownish gray, silty, hard, dry

As above

675

670

665

660

655

650

645

640

635

630

Purged 70 gallons from 58-60' bgs. Collect sample #07CV08-51.

End pilot hole #2 on 01/05/2007. Install 14" isolation casing on 02/11/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

697585.683




11/29/2006 - 02/20/2007

728.59113059724.26

S-11

S-12

S-13

S-14

S-15

97-107

107-117

117-127

127-137

137-147

10/10

10/10

10/10

10/10

10/10

Silt (ML)brownish gray, very stiff to stiff, dry

Lean Clay (CL)brownish gray, silty, hard, dry, some sand and trace gravel

As above

Silt (ML)brownish gray, clayey, stiff, dry

Silty Sand (SM)brownish gray, fine, medium dense, wet

As above

As above

As above

Well Graded Gravel (GW)gray, fine to course, some course sand, loose, wet

Silt (ML)gray, very stiff, moist to dry, some fine sand

End of Boring

625

620

615

610

605

600

595

590

585

580



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

698553.719




11/28/2006 - 02/12/2007

726.98113059102.17

S-1

S-2

S-3

S-4

S-5

0-7

7-17

17-27

27-37

37-48

7/7

14/10

10/10

12/10

12/11

Ground Surface

Well Graded Sand with Clay and Gravel (SW)fine-coarse gravel, brown-gray, wet, loose

Lean Clay (CL)gray, moist, medium, trace fine gravel

As above



As above, stiff


As above

Well Graded Sand with Gravel (SW)As above


Silt (ML)some clay and fine gravel, gray, hard, dry

727

720

715

710

705

700

695

690

685

680

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0Water level = 22'. Purge 25 gallons from 37-41' bgs. Collect sample #07CV08-03 and duplicate #07CV08-04 on 11/28/06.PID = 0.0


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

698553.719




11/28/2006 - 02/12/2007

726.98113059102.17

S-6

S-7

S-8

S-9

S-10

48-58

58-68

68-78

78-88

88-98

11/10

10/10

10/10

10/10

10/10

As above

Lean Clay (CL)hard, gray, dry, trace fine gravel

As above

Clayey Sand (SC)fine, gray, some clay, trace fine gravel, very stiff, moist

Clayey Sand (SC)fine, gray, little clay, trace fine gravel, stiff, moist

Poorly Graded Sand (SP)gray, fine, trace to little silt, loose, wet

Silt (ML)little clay, stiff, moist

Silt (ML)some clay, very stiff, moist to dry

Silt (ML)gray, clayey, very stiff, dry

675

670

665

660

655

650

645

640

635

630

PID = 0.0

PID = 0.0

PID = 0.0

Collect sample #07CV08-57 at 1515 on 01/10/07 from 88-91' bgs.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

698553.719




11/28/2006 - 02/12/2007

726.98113059102.17

S-11

S-12

S-13

S-14

98-107

107-117

117-127

127-137

9/9

10/10

10/10

10/10

As above

Silt (ML)gray, fine, silty, moist

Silt (ML)stiff, gray, some clay and trace gravel

Silt (ML)gray, firm, moist, some fine sand

Silty Sand (SM)fine to medium, gray, wet, medium dense, some silt

Poorly Graded Gravel (GP)fine gravel with course sand, gray, loose, wet, some fine sand

Poorly Graded Sand (SP)fine to medium, gray, loose, wet

End of Boring

625

620

615

610

605

600

595

590

585

580

End pilot hole #3 on 02/12/2007. Complete monitoring well on 02/12/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

693569.74




12/05/07 - 02/02/2007

736.49213058479.52

S-1

S-2

S-3

S-4

S-5

0-7

7-17

17-27

27-37

37-47

5/7

11/10

10/10

10/10

11/10

Ground Surface

Clayey Sand with Gravel (SC)dark gray, gravel fine, moist, medium

Poorly Graded Sand (SP)medium-fine, brown, wet, loose, trace fine gravel

Sandy Lean Clay (CL)moist, trace gravel, gray-brown, stiff

Lean Clay (CL)gray, trace gravel, hard, moist grading to dry

As above, dry

As above

Poorly Graded Sand (SP)fine with some medium, brown-gray, wet, loose

Poorly Graded Sand (SP)medium-fine, brown-gray, wet, loose

Well Graded Sand (SW)gray, wet, loose, trace fine gravel

As above

Lean Clay (CL)gray, trace fine gravel, hard, dry

As above

737

730

725

720

715

710

705

700

695

690

Collect sample #07CV08-30 and duplicate #07CV08-31 from 29-37' bgs. Purge 20 gallons.

PID = 0.0

PID = 0.0

End pilot hole #1 on 12/05/06. Install 20" isoloation casing on 12/20/2006.

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

693569.74




12/05/07 - 02/02/2007

736.49213058479.52

S-6

S-7

S-8

S-9

S-10

48-58

58-68

68-78

78-88

88-97

10/10

10/10

10/10

10/10

10/10

Lean Clay (CL)trace gravel, cobbles to fine, hard, dry-moist in tip

Lean Clay (CL)trace fine gravel, hard, dry, gray

Lean Clay (CL)trace sand and gravel (fine), hard, dry, gray

As above

Clayey Sand (SC)gray, fine, trace fine gravel, wet

Lean Clay (CL)hard, dry, trace fine gravel, gray

Lean Clay (CL)gray, silty, dry, hard, trace to some fine gravel

As above

685

680

675

670

665

660

655

650

645

640

Collect sample #07CV08-46 from 80-82' bgs.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

693569.74




12/05/07 - 02/02/2007

736.49213058479.52

S-11

S-12

S-13

S-14

S-15

97-107

107-117

117-127

127-137

137-147

10/10

10/10

10/10

10/10

10/10

As above

Silty Sand (SM)grayish brown, fine-medium, trace fine-coarse gravel, loose, wet to moist

Lean Clay (CL)dry, gray, silty, some sand, trace gavel, hard

As above

Lean Clay (CL)dry, grayish brown, silty, little sand, trace gravel

Silty Sand (SM)wet, grayish brown, silty sand, fine, loose, trace gravel

635

630

625

620

615

610

605

600

595

590


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

693569.74




12/05/07 - 02/02/2007

736.49213058479.52

S-16

S-17

S-18

S-19

S-20

147-157

157-167

167-177

177-187

187-197

10/10

10/10

10/10

10/10

10/10

Lean Clay (CL)grayish brown, silty, dry, hard, trace gravel and sand

Lean Clay (CL)silty, brown, dry, hard, trace gravel and sand

Fat Clay (CH)brown, moist, stiff, trace silt

As above

Lean Clay (CL)silty, grayish brown, very stiff, dry to moist, trace sand


Poorly Graded Sand (SP)medium, brownish gray, wet, trace course sand and fine gravel

Poorly Graded Sand (SP)medium to fine, brown, loose, wet

585

580

575

570

565

560

555

550

545

540



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

693569.74




12/05/07 - 02/02/2007

736.49213058479.52

S-21

S-22

197-207

207-217

10/10

10/10

Well Graded Sand (SW)medium to course, brown, wet, loose, some fine, little gravel, brown hard silt in tip at 217' bgs

End of Boring

535

530

525

520

515

510

505

500

495

490


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-1

S-2

S-3

S-4

S-5

S-6

0-7

7-17

17-27

27-37

37-47

47-51

5/7

11/10

11/10

10/10

10/10

4/4

Ground Surface

Lean Clay with Sand (CL)brown, moist, medium, trace fine gravel

As above

Poorly Graded Sand (SP)medium-fine, brown, wet, loose, two lenses of medium-coarse

Well Graded Sand with Gravel (SW)wet, loose, gravel fine

Lean Clay (CL)gray, trace fine gravel, moist, stiff

Silt (ML)gray, hard, moist-dry, trace fine gravel

Lean Clay (CL)gray, moist, stiff, trace gravel

Silty Sand (SM)gray, moist, dense, fine sand


As above

Well Graded Sand wtih Gravel (SW)gravel fine, gray, wet, loose

As above

Lean Clay (CL)gray, trace fine gravel, dry, hard

731

725

720

715

710

705

700

695

690

685

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0Collect sample #07CV08-27 from 10-11' bgs. Purge 25 gallons.PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

Collect sample #07CV08-29 from 42-47' bgs. Purge 15 gallons.PID = 0.0

PID = 0.0

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-7

S-8

S-9

S-10

S-11

51-58

58-68

68-78

78-88

88-98

7/7

10/10

10/10

6/10

10/10

Lean Clay (CL)gray, trace to some fine gravel, dry, hard

Lean Clay (CL)gray, gravelly (fine), stiff, dry,

As above

Poorly Graded Sand with Clay (SP/SC)gray, clayey sand (fine), poorly graded with gravel (fine), wet, loose

Poorly Graded Gravel with Clay (GP/GC)poorly graded with clay and sand, wet

Silt (ML)gray, moist tom 74.8' bgs, dry after, trace to some fine gravel

As above

Poorly Graded Sand (SP)grayish brown, fine, trace to little silt, loose, moist

Poorly Graded Sand (SP)grayish brown, fine-medium, trace silt, loose, wet

As above

675

670

665

660

655

650

645

640

635

End pilot hole #1 on 12/04/2006. Complete 20" isolation casing on12/14/2006.

Collect sample #07CV08-45 from 61-68' bgs. Purge 48 gallons.


Collect sample #07CV08-58 from 88-98' bgs. Purge 50 gallons.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-14

S-15

S-16

S-12

S-13

98-108

108-118

118-128

128-138

138-148

10/10

10/10

10/10

4/10

10/10

Well Graded Sand (SW)grayish brown, fine to coarse with little fine to coarse gravel (mostly fine), trace silt, wet, loose

Silt (ML)grayish brown with little clay, very stiff, moist


Poorly Graded Sand (SP)grayish brown, fine, little to some silt, loose, moist

Silt (ML)grayish brown, little fine sand, very stiff, moist

Poorly Graded Sand (SP)grayish brown, fine-coarse, little silt and fine gravel, medium dense, moist

Silt (ML)grayish brown, trace to little clay, very stiff, moist

Poorly Graded Sand (SP)grayish brown, fine-medium, trace silt, saturated, loose

Poorly Graded Sand (SP)grayish brown, fine, trace silt, wet, loose to medium dense

Silt (ML)grayish brown, some clay, very stiff, moist

Silty Sand (SM)grayish brown, fine, some silt, moist, medium stiff

625

620

615

610

605

600

595

590

585

Colelct sample #07CV08-59 from 98-108' bgs. Purge 60 gallons.

Collect sample #07CV08-60 108-118' bgs. Purge 50 gallons.


Purge 30 gallons on 01/24/2007, pump failure. Reset screen on 01/25/2007, purge 50 gallons, collect sample #07CV08-76 from 136-146' bgs.


Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-17

S-18

S-19

S-20

S-21

148-156

156-166

166-176

176-186

186-196

6/10

10/10

10/10

10/10

10/10

Silty Sand (SM)brown, fine, some silt, wet, medium dense

As above, wet

Poorly Graded Sand (SP)brown to gray, medium-coarse with trace fine gravel

Silt (ML)hard, gray, moist to dry

Silty Sand (SM)gray, fine-medium, wet, loose

Silt (ML)very stiff to hard, moist, trace gravel and medium sand from 166-167'

Silt (ML)very stiff to hard, moist to dry

Poorly Graded Sand (SP)fine, medium dense, moist to wet

Silty Sand (SM)fine sand and silt, gray, medium dense, moist to wet

Silt (ML)gray, hard, moist to dry

Lean Clay (CL)gray, dry, hard, silty, trace gravel, 4" cobble at 187'

As above

575

570

565

560

555

550

545

540

535



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-22

S-23

S-24

S-25

S-26

196-206

260-216

216-226

226-236

236-246

10/10

10/10

10/10

10/10

10/10

Silty Gravel (GM)fine to cobbles with silt, gray, dry

Lean Clay (CL)very silty, trace gravel, some sand, stiff, dry, hard at 205-206'

Lean Clay (CL)silty clay, trace gravel, hard, dry

Clay (CL)silty, gray, hard, dry, trace gravel

Clayey Sand (SC)wet, soft, loose

Lean Clay (CL)silty, gray, hard, dry, trace gravel

Lean Clay (CL)gray, silty, hard, dry, trace gravel, reddish-brown silty clay at 227.6-228'

Lean Clay (CL)reddish brown, silty, hard, dry

Lean Clay (CL)gray, silty, hard, dry


525

520

515

510

505

500

495

490

485

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 6 of 6

Elevation:Easting:


De

pth

bg

s (

ft)

255

260

265

270

275

280

285

290

295

300

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

695898.509




12/04/2006 - 01/30/2007

730.36913057859.51

S-27

S-28

246-256

256-266

10/10

10/10

Lean Clay (CL)silty, reddish brown, hard, dry, trace gravel


Lean Clay (CL)silty, grayish brown, hard, dry, trace gravel

End of Boring

475

470

465

460

455

450

445

440

435

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

697966.722




11/29/2006 - 02/13/2007

726.66713058087.86

S-1

S-2

S-3

S-4

S-5

S-6

0-7

7-17

17-27

27-37

37-47

47-48

7/7

10/10

11/10

11/10

11/10

1/1

Ground Surface

Lean Clay (CL)brown, moist, medium, trace fine gravel

As above, brown to gray

Well Graded Sand with Gravel (SW)gravel fine-coarse, gray grading to rust orange, loose, wet

As above

Lean Clay (CL)gray, moist, stiff, trace fine gravel

Poorly Graded Sand (SP)gray, loose, moist


Silt (ML)gray, trace fine gravel, moist, hard


Silt (ML)trace sand and gravel, gray, moist, hard

As above

727

720

715

710

705

700

695

690

685

680

Collect sample #07CV08-23 from 14.5-17' bgs.



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

697966.722




11/29/2006 - 02/13/2007

726.66713058087.86

S-7

S-8

S-9

S-10

S-11

48-58

58-68

68-78

78-88

88-97

10/10

10/10

9/9

10/10

10/10

Silty Clay with Gravel (CL/ML)gray, wet, medium

Silty Clay with Gravel (CL/ML)trace sand and gravel, gray, hard, moist

Silty Clay with Sand (CL/ML)gray, medium dense, moist

Sandy Silt (ML)trace clay and gravel, gray, hard, moist to dry

As above

Sandy Silt (ML)some coarse gravel and cobbles, gray, medium dense, wet

Sandy Silt (ML)trace clay and gravel, gray, hard, moist

Poorly Graded Sand (SP)trace gravel, wet

Sandy Silt (ML)gray, medium dense, moist


Silt (ML)hard, gray, dry, some clay

As above

675

670

665

660

655

650

645

640

635

630



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

697966.722




11/29/2006 - 02/13/2007

726.66713058087.86

S-12

S-13

S-14

S-15

S-16

97-107

107-117

117-127

127-137

137-147

10/10

10/10

10/10

10/10

10/10

Silt (ML)stiff, gray, some sand and fine gravel

Silt (ML)stiff, gray, some fine sand, moist to dry

As above

Silt (ML)firm to stiff, gray, some clay, moist to dry, dry 126-127

Silt (ML)firm to stiff, gray, some clay, moist to dry

Poorly Graded Sand (SP)loose, brownish gray, wet, fine -medium, some silt

As above

End of Boring

625

620

615

610

605

600

595

590

585

580 End pilot hole #3 on 02/13/2007. Install monitoring well on 02/14/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

697949.635




12/06/2006 - 02/16/2007

737.95113058929.35

S-1

S-2

S-3

S-4

S-5

0-8

8-18

18-28

28-38

38-48

8/8

9/10

11/10

10/10

12/10

Ground Surface

Silt (ML)yellow, moist, stiff grading to hard

Clay (CL)yellow, moist, stiff

Clay (CL)gray, trace gravel, moist, hard

As above

As above

Poorly Graded Sand with Silt (SP/SM)gray, medium-fine, moist, dense

Lean Clay (CL)gray, hard, trace gravel, moist

Poorly Graded Sand with Silt (SP/SM)gray, moist, dense, medium-fine


As above

As above, hard, dry

738

735

730

725

720

715

710

705

700

695

690

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0Install 20" isolation casing on 12/19/2006.

PID = 0.0

PID = 0.0

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

697949.635




12/06/2006 - 02/16/2007

737.95113058929.35

S-6

S-7

S-8

S-9

S-10

S-11

S-12

48-53

53-58

58-68

68-78

78-88

88-93

93-97

6/5

5/5

11/10

10/10

10/10

5/5

4/4

As above

Lean Clay (CL)hard, dry, gray, trace gravel

As above

Poorly Graded Gravel (GP)fine, some coarse sand, gray, wet

Poorly Graded Gravel (GP)fine, some fine-medium sand, gray, wet

Clay (CL)hard, gray, trace gravel, dry


Silt (ML)brownish gray, dry, hard, some clay

As above

685

680

675

670

665

660

655

650

645

640


PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0


PID = 0.0

End pilot hole #2 on 01/05/2007. Install 14" isolation casing 02/02/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

697949.635




12/06/2006 - 02/16/2007

737.95113058929.35

S-13

S-14

S-15

S-16

S-17

97-107

107-117

117-127

127-137

137-147

10/10

10/10

10/10

10/10

10/10

Silt (ML)brownish gray, dry, stiff to very stiff, some clay and trace gravel and sand

Silt (ML)grayish brown, firm to stiff, moist, little fine sand

Silt (ML)grayish brown, firm to stiff, moist, some fine sand, little gravel

Silt (ML)grayish brown, stiff, dry to moist, little fine sand, trace gravel

Silt (ML)brownish gray, dry to moist, firm to stiff, some fine sand

635

630

625

620

615

610

605

600

595

590

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

697949.635




12/06/2006 - 02/16/2007

737.95113058929.35

S-18

S-19

S-20

S-21

S-22

147-157

157-167

167-177

177-187

187-197

10/10

10/10

10/10

10/10

10/10

Silty Sand (SM)brownish gray, fine to medium, medium dense, moist to wet, some silt

Poorly Graded Sand (SP)brownish gray, medium, medium dense to loose, wet, some fine sand

Poorly Graded Sand (SP)brownish gray, fine to medium, loose, wet, little silt, trace gravel

Poorly Graded Sand (SP)brownish gray, medium, loose, wet, little silt, some fine

Well Graded Sand (SW)grayish brown, medium, loose, wet, some course, trace fine sand and fine gravel

Silt (ML)grayish brown, firm to stiff, moist, some fine sand

Silt (ML)grayish brown, firm, moist, some fine sand

585

580

575

570

565

560

555

550

545

540

Collect sample #07CV08-85 from 157-167' bgs @ 1200 on 2/15/07.

Collect sample from 177-187' bgs.

Complete 7" isolation casing on 02/18/2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Elevation:Easting:


De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

697949.635




12/06/2006 - 02/16/2007

737.95113058929.35

S-23

S-24

S-25

S-26

197-207

207-217

217-227

227-237

10/10

10/10

0/10

10/10

Poorly Graded Sand (SP)grayish brown, fine grading to medium, loose, wet

Poorly Graded Sand (SP)grayish brown, fine to medium, loose, wet

Well Graded Sand (SW)grayish brown, medium to course, loose, wet

No recovery, assume same as above

Poorly Graded Sand (SP)brownish gray, medium to fine, loose, wet, trace course

End of Boring

535

530

525

520

515

510

505

500

495

490



Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 4

Elevation:Easting:


De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

696909.863




11/27/2006 - 02/16/2006

724.17413058519.09

S-1

S-2

S-3

S-4

S-5

S-6

0-7

7-17

17-27

27-37

37-47

47-48

4.5/7

10/10

10/10

13/10

10/10

1/1

Ground Surface

Poorly Graded Sand (SP), Fillmedium-fine, brown, moist, loose, trace coarse gravel, brick fragments

Poorly Graded Sand (SP)medium-fine, brown, moist, loose, trace fine gravel

Poorly Graded Sand (SP)medium-coarse, brown, moist, loose

Silt (ML)gray, dry, hard, trace fine gravel

Silt with Sand (ML)gray, moist, medium


Poorly Graded Sand (SP)medium-fine, gray, moist, loose

Silt (ML)gray, dry, hard

As above

Clayey Sand (SC)gray, fine, little clay, trace fine gravel, hard, dry

724

720

715

710

705

700

695

690

685

680

675

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

PID = 0.0

No water added 0-37'. Purge 7 gallons. Well purged dry. Collect sample #07CV08-01. Water level = 17' bgsPID = 0.0Install 20" isolation casing on 01/04/2007.

End pilot hole #1 on 11/27/2006 at 1800.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 4

Elevation:Easting:


De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

696909.863




11/27/2006 - 02/16/2006

724.17413058519.09

S-7

S-8

S-9

S-10

S-11

58-68

68-78

78-88

88-98

48-58 10/10

10/10

10/10

10/10

10/10

As above


Silt (ML)gray, little clay, stiff, moist

As above

Silt (ML)trace clay, gray, moist, medium stiff

Silt (ML)gray, little clay, very stiff, dry

Silty Sand (SM)gray, some silt, medium dense, moist


Silt (ML)gray, little to some clay, very stiff, dry

As above, dry

670

665

660

655

650

645

640

635

630

625


End piolot hole #2 on 01/10 /2007.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 4

Elevation:Easting:


De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

696909.863




11/27/2006 - 02/16/2006

724.17413058519.09

S-12

S-13

S-14

S-15

S-16

98-107

107-117

117-127

127-137

137-147

9/9

10/10

10/10

10/10

10/10

Silt (ML)firm to stiff, gray, clayey, trace sand and gravel, dry

Silt (ML)gray, soft to firm, moist, with some fine sand

Silty Sand (SM)gray, fine, trace gravel, moist to wet

Silty Sand (SM)gray to brown, fine, medium dense, wet

Clayey Sand (SC)brown, dense, fine-medium, some fine gravel, moist to dry

Well Graded Sand (SW)gray, wet, loose, medium-coarse, some fine gravel


As above

Silty Sand (SM)gray, medium dense, fine, moist-wet

Silt Sand (SM)gray, fine, wet, loose

620

615

610

605

600

595

590

585

580

575

Purged dry after 15 gallons. Allowed to recharge for 30 minutes, collect sample #07CV08-84 from 112-117' bgs.

Purged 60 gallons, collect sample #07CV08-87 from 117-127' bgs.

Purged 59 gallons, collect sample #07CV08-88 from 127-133' bgs.

Install 7" islolation casing on 02/20/2007. Not likely to produce.


Purged 53 gallons, collect sample #07CV08-90.

Boring Number:

Client:

Project:

Location:

Northing:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 4

Elevation:Easting:


De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Sa

mp

le

Ty

pe

/Nu

mb

er

Sa

mp

le

Inte

rva

l

Re

co

ve

ry (

ft)

US

CS

Sy

mb

ol



Ele

va

tio

n (

ft

am

sl)


Monitoring

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

696909.863




11/27/2006 - 02/16/2006

724.17413058519.09

S-17

S-18

S-19

147-157

157-167

167-177

9/10

10/10

10/10

Poorly Graded Sand (SP)brown, wet, loose, fine-medium

Silty Sand (SM)fine, gray, loose, wet

Well Graded Sand (SW)brown-gray, medium-coarse, wet, loose

Silt (ML)grayish brown, firm to stiff, moist to dry, trace fine sand

End of Boring

570

565

560

555

550

545

540

535

530

525


Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)

Soil Name, USCS GroupSymbol, Color, Moisture

Content, Relative Density orConsistency, Soil Structure,

Mineralogy US

CS

Sy

mb

ol pCBSA

ConcentrationWell Construction

InformationWell Construction

Notes

MSW-5

USEPA Region 5

Velsicol

St. Louis

350226.ET.02




01/31/2007 - 02/26/2007

722

715

710

705

700

695

690

685

680

675

Ground Surface







As above

As above




0 6ug/L

ND

20

" Is

ola

tio

n C

asin

g2

4"

Bo

reh

ole

14

" Is

ola

tio

n C

asin

g8

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t

Survey DataNorthing: 696197.245Easting: 13059234.19TOC Elevation: 721.75

Isolation Casing #1Material: Type 316 SteelDepth: 56 feetDiameter: 20 inchesJoints: WeldedGrout volume: 563 gallons



Monitoring WellMaterial: 2" PVCJoints: Flush threadedGrout volume: 213 gallonsProcover: Flush mountConcrete Pad: 2'x2'x6"

Well ScreenMaterial: 2" PVCSlot Size: .010 inch machinedInterval: 184.8'-214.8' bgsJoints: Flush threaded

Filter PackType: Silica SandQuantity: 600 lbsMethod: direct pour/tremmieSize: 10/20

SealType: 3/8" Sure Seal bentonite chipsQuantity: 100 lbsMethod: direct pour/tremmie

DevelopmentMethod: AirliftTime: 45 minutesVolume: 100 gallonsComments: Water clear

CommentsGrout Mix: 376 lbs. Portland Type 1, 12.5 lbs. bentonite gel, 40 gallons waterGrout Method: Tremie pipe

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-5

USEPA Region 5

Velsicol

St. Louis

350226.ET.02




01/31/2007 - 02/26/2007

670

665

660

655

650

645

640

635

630

625












As above, dry

As above, dry

0 6ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-5

USEPA Region 5

Velsicol

St. Louis

350226.ET.02




01/31/2007 - 02/26/2007

620

615

610

605

600

595

590

585

580

575











0 6ug/L

4.4

5.5

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Soil Description

De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-5

USEPA Region 5

Velsicol

St. Louis

350226.ET.02




01/31/2007 - 02/26/2007

570

565

560

555

550

545

540

535

530

525



As above




As above

0 6ug/L

ND

Well Screen

Filter Pack

Seal

30

'

17

7.8

' bg

s1

81

.8' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Soil Description

De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-5

USEPA Region 5

Velsicol

St. Louis

350226.ET.02




01/31/2007 - 02/26/2007

520

515

510

505

500

495

490

485

480

475


As above

End of Boring

0 6ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

729

725

720

715

710

705

700

695

690

685

680

Ground Surface

Sandy Lean Clay with Gravel (CL)brown, moist, medium, fine gravel

Lean Clay (CL)brown, moist, medium

Lean Clay (CL)brown, moist, medium, fine gravel

Lean Clay (CL)gray, trace fine gravel, moist, medium

As above, hard at 25.5-26'

Well Graded Sand (SW)gray, trace fine gravel, moist, hard


Lean Clay (CL)gray, dry, hard, trace fine-coarse gravel

Lean Clay (CL)gray, moist, stiff

Clayey Sand with Gravel (SC)brown, moist, loose

0 400ug/L

390.0

14

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t2

0"

Iso

latio

n C

asin

g2

4"

Bo

reh

ole




Monitoring WellMaterial: 2" PVCJoints: Flush threadedGrout volume: 310 gallonsProcover: Flush mount road boxConcrete Pad: 2'x2'x12"






Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

675

670

665

660

655

650

645

640

635

630

poor recovery - rock plugged core barrel. Ended in clay.

Well Graded Sand with Gravel (SW)fine gravel, gray, wet, loose

Lean Clay (CL)gray, moist, some sand and trace gravel

Clayey Sand (SC)fine, with trace gravel, moist

Silt with Sand (ML)some fine sand, dry, hard, gray

Silt with Sand (ML)some fine sand and clay, dry, hard

Silt (ML)brownish gray, clayey, hard, dry, trace gravel

As above

As above

Lean Clay (CL)brownish gray, silty, hard, dry

As above

0 400ug/L

120.0

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-6

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

625

620

615

610

605

600

595

590

585

580

Silt (ML)brownish gray, very stiff to stiff, dry

Lean Clay (CL)brownish gray, silty, hard, dry, some sand and trace gravel

As above

Silt (ML)brownish gray, clayey, stiff, dry

Silty Sand (SM)brownish gray, fine, medium dense, wet

As above

As above

As above

Well Graded Gravel (GW)gray, fine to course, some course sand, loose, wet

Silt (ML)gray, very stiff, moist to dry, some fine sand

End of Boring

0 400ug/L

ND

13

4' b

gs

Well Screen

Filter Pack

Seal

5'

12

6' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/12/2007 - 02/26/2007

727

725

720

715

710

705

700

695

690

685

680

Ground Surface



As above



As above, stiff


As above

Well Graded Sand with Gravel (SW)As above


0 120ug/L

95.0

14

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t2

0"

Iso

latio

n C

asin

g2

4"

Bo

reh

ole





Well ScreenMaterial: 2" PVCSlot Size: .010 inch machinedInterval: 117.5-132.5' bgsJoints: Flush threaded





Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/12/2007 - 02/26/2007

675

670

665

660

655

650

645

640

635

630

Silt (ML)some clay and fine gravel, gray, hard, dry

As above

Lean Clay (CL)hard, gray, dry, trace fine gravel

As above

Clayey Sand (SC)fine, gray, some clay, trace fine gravel, very stiff, moist

Clayey Sand (SC)fine, gray, little clay, trace fine gravel, stiff, moist

Poorly Graded Sand (SP)gray, fine, trace to little silt, loose, wet

Silt (ML)little clay, stiff, moist

Silt (ML)some clay, very stiff, moist to dry

Silt (ML)gray, clayey, very stiff, dry

0 120ug/L

1.1

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-7

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/12/2007 - 02/26/2007

625

620

615

610

605

600

595

590

585

580

As above

Silt (ML)gray, fine, silty, moist

Silt (ML)stiff, gray, some clay and trace gravel


Silty Sand (SM)fine to medium, gray, wet, medium dense, some silt

Poorly Graded Gravel (GP)fine gravel with course sand, gray, loose, wet, some fine sand

Poorly Graded Sand (SP)fine to medium, gray, loose, wet

End of Boring

0 120ug/L

ND

11

4.5

' bg

s

Well Screen

Filter Pack

Seal1

5'

10

9.5

' bg

s

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/23/2007

737

730

725

720

715

710

705

700

695

690

Ground Surface

Clayey Sand with Gravel (SC)dark gray, gravel fine, moist, medium

Poorly Graded Sand (SP)medium-fine, brown, wet, loose, trace fine gravel

Sandy Lean Clay (CL)moist, trace gravel, gray-brown, stiff

Lean Clay (CL)gray, trace gravel, hard, moist grading to dry

As above, dry

As above

Poorly Graded Sand (SP)fine with some medium, brown-gray, wet, loose

Poorly Graded Sand (SP)medium-fine, brown-gray, wet, loose

Well Graded Sand (SW)gray, wet, loose, trace fine gravel

As above

Lean Clay (CL)gray, trace fine gravel, hard, dry

As above

0 28ug/L

ND

20

" Is

ola

tio

n C

asin

g2

4"

Bo

reh

ole

14

" Is

ola

tio

n C

asin

g7

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t






Well ScreenMaterial: 2" PVCSlot Size: .010 inch machinedInterval: 192'-217' bgsJoints: Flush threaded





Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/23/2007

685

680

675

670

665

660

655

650

645

640

Lean Clay (CL)trace gravel, cobbles to fine, hard, dry-moist in tip

Lean Clay (CL)trace fine gravel, hard, dry, gray

Lean Clay (CL)trace sand and gravel (fine), hard, dry, gray

As above

Clayey Sand (SC)gray, fine, trace fine gravel, wet

Lean Clay (CL)hard, dry, trace fine gravel, gray

Lean Clay (CL)gray, silty, dry, hard, trace to some fine gravel

As above

0 28ug/L

26.0

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/23/2007

635

630

625

620

615

610

605

600

595

590

As above

Silty Sand (SM)grayish brown, fine-medium, trace fine-coarse gravel, loose, wet to moist

Lean Clay (CL)dry, gray, silty, some sand, trace gavel, hard

As above

Lean Clay (CL)dry, grayish brown, silty, little sand, trace gravel

Silty Sand (SM)wet, grayish brown, silty sand, fine, loose, trace gravel

0 28ug/L

2.8

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Soil Description

De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/23/2007

585

580

575

570

565

560

555

550

545

540

Lean Clay (CL)grayish brown, silty, dry, hard, trace gravel and sand

Lean Clay (CL)silty, brown, dry, hard, trace gravel and sand

Fat Clay (CH)brown, moist, stiff, trace silt

As above



Poorly Graded Sand (SP)medium, brownish gray, wet, trace course sand and fine gravel

Poorly Graded Sand (SP)medium to fine, brown, loose, wet

0 28ug/L

Well Screen

Filter Pack

Seal

18

3' b

gs

18

8' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Soil Description

De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-8

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/23/2007

535

530

525

520

515

510

505

500

495

490

Well Graded Sand (SW)medium to course, brown, wet, loose, some fine, little gravel, brown hard silt in tip at 217' bgs

End of Boring

0 28ug/L

0.3

25

'

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 6

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

731

725

720

715

710

705

700

695

690

685

Ground Surface

Lean Clay with Sand (CL)brown, moist, medium, trace fine gravel

As above

Poorly Graded Sand (SP)medium-fine, brown, wet, loose, two lenses of medium-coarse

Well Graded Sand with Gravel (SW)wet, loose, gravel fine

Lean Clay (CL)gray, trace fine gravel, moist, stiff

Silt (ML)gray, hard, moist-dry, trace fine gravel


Silty Sand (SM)gray, moist, dense, fine sand


As above

Well Graded Sand wtih Gravel (SW)gravel fine, gray, wet, loose

As above

Lean Clay (CL)gray, trace fine gravel, dry, hard

0 32ug/L

1.2

4.6

20

" Is

ola

tio

n C

asin

g2

4"

Bo

reh

ole

14

" Is

ola

tio

n C

asin

g8

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t











Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 6

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

675

670

665

660

655

650

645

640

635

Lean Clay (CL)gray, trace to some fine gravel, dry, hard

Lean Clay (CL)gray, gravelly (fine), stiff, dry,

As above

Poorly Graded Sand with Clay (SP/SC)gray, clayey sand (fine), poorly graded with gravel (fine), wet, loose

Poorly Graded Gravel with Clay (GP/GC)poorly graded with clay and sand, wet

Silt (ML)gray, moist to 74.8' bgs, dry after, trace to some fine gravel

As above

Poorly Graded Sand (SP)grayish brown, fine, trace to little silt, loose, moist

Poorly Graded Sand (SP)grayish brown, fine-medium, trace silt, loose, wet

As above

0 32ug/L

32.0

1.7

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 6

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

625

620

615

610

605

600

595

590

585


Silt (ML)grayish brown with little clay, very stiff, moist


Poorly Graded Sand (SP)grayish brown, fine, little to some silt, loose, moist

Silt (ML)grayish brown, little fine sand, very stiff, moist

Poorly Graded Sand (SP)grayish brown, fine-coarse, little silt and fine gravel, medium dense, moist

Silt (ML)grayish brown, trace to little clay, very stiff, moist

Poorly Graded Sand (SP)grayish brown, fine-medium, trace silt, saturated, loose

Poorly Graded Sand (SP)grayish brown, fine, trace silt, wet, loose to medium dense

Silt (ML)grayish brown, some clay, very stiff, moist

Silty Sand (SM)grayish brown, fine, some silt, moist, medium stiff

0 32ug/L

1.7

30.0

23.0

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 6

Soil Description

De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

575

570

565

560

555

550

545

540

535

Silty Sand (SM)brown, fine, some silt, wet, medium dense

As above, wet

Poorly Graded Sand (SP)brown to gray, medium-coarse with trace fine gravel

Silt (ML)hard, gray, moist to dry

Silty Sand (SM)gray, fine-medium, wet, loose

Silt (ML)very stiff to hard, moist, trace gravel and medium sand from 166-167'

Silt (ML)very stiff to hard, moist to dry

Poorly Graded Sand (SP)fine, medium dense, moist to wet

Silty Sand (SM)fine sand and silt, gray, medium dense, moist to wet


Lean Clay (CL)gray, dry, hard, silty, trace gravel, 4" cobble at 187'

As above

0 32ug/L

22.0

18.0

ND

17

3.5

8' b

gs

19

1.5

8' b

gs

Well Screen

Filter Pack

Seal

5'

15

6.5

8' b

gs

16

0.5

8' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 6

Soil Description

De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

525

520

515

510

505

500

495

490

485

Silty Gravel (GM)fine to cobbles with silt, gray, dry

Lean Clay (CL)very silty, trace gravel, some sand, stiff, dry, hard at 205-206'

Lean Clay (CL)silty clay, trace gravel, hard, dry

Clay (CL)silty, gray, hard, dry, trace gravel

Clayey Sand (SC)wet, soft, loose


Lean Clay (CL)gray, silty, hard, dry, trace gravel, reddish-brown silty clay at 227.6-228'

Lean Clay (CL)reddish brown, silty, hard, dry

Lean Clay (CL)gray, silty, hard, dry


0 32ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 6 of 6

Soil Description

De

pth

bg

s (

ft)

255

260

265

270

275

280

285

290

295

300

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-31D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




01/26/2007 - 02/26/2007

475

470

465

460

455

450

445

440

435



Lean Clay (CL)silty, grayish brown, hard, dry, trace gravel

End of Boring

0 32ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 3

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/14/2007

727

720

715

710

705

700

695

690

685

680

Ground Surface

Lean Clay (CL)brown, moist, medium, trace fine gravel

As above, brown to gray

Well Graded Sand with Gravel (SW)gravel fine-coarse, gray grading to rust orange, loose, wet

As above


Poorly Graded Sand (SP)gray, loose, moist


Silt (ML)gray, trace fine gravel, moist, hard


Silt (ML)trace sand and gravel, gray, moist, hard

0 6ug/L

ND

We

ll G

rou

t1

4"

Iso

latio

n C

asin

gIs

ola

tio

n C

asin

g G

rou

t2

0"

Iso

latio

n C

asin

g2

4"

Bo

reh

ole










Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 3

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/14/2007

675

670

665

660

655

650

645

640

635

630

As above

Silty Clay with Gravel (CL/ML)gray, wet, medium

Silty Clay with Gravel (CL/ML)trace sand and gravel, gray, hard, moist

Silty Clay with Sand (CL/ML)gray, medium dense, moist

Sandy Silt (ML)trace clay and gravel, gray, hard, moist to dry

As above

Sandy Silt (ML)some coarse gravel and cobbles, gray, medium dense, wet

Sandy Silt (ML)trace clay and gravel, gray, hard, moist

Poorly Graded Sand (SP)trace gravel, wet

Sandy Silt (ML)gray, medium dense, moist


Silt (ML)hard, gray, dry, some clay

As above

0 6ug/L

5.4

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 3

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-35D3

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/13/2007 - 02/14/2007

625

620

615

610

605

600

595

590

585

580

Silt (ML)stiff, gray, some sand and fine gravel

Silt (ML)stiff, gray, some fine sand, moist to dry

As above

Silt (ML)firm to stiff, gray, some clay, moist to dry, dry 126-127

Silt (ML)firm to stiff, gray, some clay, moist to dry

Poorly Graded Sand (SP)loose, brownish gray, wet, fine -medium, some silt

As above

End of Boring

0 6ug/L

ND

12

8.4

2' b

gs

Well Screen

Filter Pack

Seal

15

'

11

9.4

2' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 5

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

738

735

730

725

720

715

710

705

700

695

690

Ground Surface


Clay (CL)yellow, moist, stiff

Clay (CL)gray, trace gravel, moist, hard

As above

As above

Poorly Graded Sand with Silt (SP/SM)gray, medium-fine, moist, dense


Poorly Graded Sand with Silt (SP/SM)gray, moist, dense, medium-fine


As above

As above, hard, dry

0 80ug/L

20

" Is

ola

tio

n C

asin

g2

4"

Bo

reh

ole

14

" Is

ola

tio

n C

asin

g7

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t











Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 5

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

685

680

675

670

665

660

655

650

645

640

As above

Lean Clay (CL)hard, dry, gray, trace gravel

As above

Poorly Graded Gravel (GP)fine, some coarse sand, gray, wet

Poorly Graded Gravel (GP)fine, some fine-medium sand, gray, wet

Clay (CL)hard, gray, trace gravel, dry


Silt (ML)brownish gray, dry, hard, some clay

As above

0 80ug/L

74.0

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 5

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

635

630

625

620

615

610

605

600

595

590

Silt (ML)brownish gray, dry, stiff to very stiff, some clay and trace gravel and sand

Silt (ML)grayish brown, firm to stiff, moist, little fine sand

Silt (ML)grayish brown, firm to stiff, moist, some fine sand, little gravel

Silt (ML)grayish brown, stiff, dry to moist, little fine sand, trace gravel

Silt (ML)brownish gray, dry to moist, firm to stiff, some fine sand

0 80ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 5

Soil Description

De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

585

580

575

570

565

560

555

550

545

540

Silty Sand (SM)brownish gray, fine to medium, medium dense, moist to wet, some silt

Poorly Graded Sand (SP)brownish gray, medium, medium dense to loose, wet, some fine sand

Poorly Graded Sand (SP)brownish gray, fine to medium, loose, wet, little silt, trace gravel

Poorly Graded Sand (SP)brownish gray, medium, loose, wet, little silt, some fine

Well Graded Sand (SW)grayish brown, medium, loose, wet, some course, trace fine sand and fine gravel

Silt (ML)grayish brown, firm to stiff, moist, some fine sand

Silt (ML)grayish brown, firm, moist, some fine sand

0 80ug/L

0.6

1.3

19

4' b

gs

Seal

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 5 of 5

Soil Description

De

pth

bg

s (

ft)

205

210

215

220

225

230

235

240

245

250

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MW-36D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/20/2007 - 02/26/2007

535

530

525

520

515

510

505

500

495

490

Poorly Graded Sand (SP)grayish brown, fine grading to medium, loose, wet

Poorly Graded Sand (SP)grayish brown, fine to medium, loose, wet

Well Graded Sand (SW)grayish brown, medium to course, loose, wet

No recovery, assume same as above

Poorly Graded Sand (SP)brownish gray, medium to fine, loose, wet, trace course

End of Boring

0 80ug/L

0.3

20

2' b

gs

Well Screen

Filter Pack

30

'

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 1 of 4

Soil Description

De

pth

bg

s (

ft)

0

5

10

15

20

25

30

35

40

45

50

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/22/2007 - 02/26/2007

724

720

715

710

705

700

695

690

685

680

675

Ground Surface

Poorly Graded Sand (SP), Fillmedium-fine, brown, moist, loose, trace coarse gravel, brick fragments

Poorly Graded Sand (SP)medium-fine, brown, moist, loose, trace fine gravel

Poorly Graded Sand (SP)medium-coarse, brown, moist, loose


Silt with Sand (ML)gray, moist, medium


Poorly Graded Sand (SP)medium-fine, gray, moist, loose

Silt (ML)gray, dry, hard

As above

Clayey Sand (SC)gray, fine, little clay, trace fine gravel, hard, dry

0 600000ug/L

420000.0

20

" Is

ola

tio

n C

asin

g2

4"

Bo

reh

ole

14

" Is

ola

tio

n C

asin

g7

" Is

ola

tio

n C

asin

gW

ell

Gro

ut

Iso

latio

n C

asin

g G

rou

t











Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 2 of 4

Soil Description

De

pth

bg

s (

ft)

55

60

65

70

75

80

85

90

95

100

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/22/2007 - 02/26/2007

670

665

660

655

650

645

640

635

630

625

As above


Silt (ML)gray, little clay, stiff, moist

As above

Silt (ML)trace clay, gray, moist, medium stiff


Silty Sand (SM)gray, some silt, medium dense, moist


Silt (ML)gray, little to some clay, very stiff, dry

As above, dry

0 600000ug/L

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 3 of 4

Soil Description

De

pth

bg

s (

ft)

105

110

115

120

125

130

135

140

145

150

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/22/2007 - 02/26/2007

620

615

610

605

600

595

590

585

580

575

Silt (ML)firm to stiff, gray, clayey, trace sand and gravel, dry

Silt (ML)gray, soft to firm, moist, with some fine sand

Silty Sand (SM)gray, fine, trace gravel, moist to wet

Silty Sand (SM)gray to brown, fine, medium dense, wet

Clayey Sand (SC)brown, dense, fine-medium, some fine gravel, moist to dry

Well Graded Sand (SW)gray, wet, loose, medium-coarse, some fine gravel


As above

Silty Sand (SM)gray, medium dense, fine, moist-wet

Silt Sand (SM)gray, fine, wet, loose

0 600000ug/L

2.3

7.2

6.3

Seal14

0' b

gs

14

8' b

gs

Well Number:

Client:

Project:

Location:

Project Number:


Drilling Method:

Logged by:

Start/Finish Date:

Sheet: 4 of 4

Soil Description

De

pth

bg

s (

ft)

155

160

165

170

175

180

185

190

195

200

Ele

va

tio

n (

ft

am

sl)



Mineralogy US

CS

Sy

mb

ol pCBSA



Notes

MSW-38D4

USEPA Region 5

Velsicol

St. Louis, MI

350226.ET.02




02/22/2007 - 02/26/2007

570

565

560

555

550

545

540

535

530

525

Poorly Graded Sand (SP)brown, wet, loose, fine-medium

Silty Sand (SM)fine, gray, loose, wet

Well Graded Sand (SW)brown-gray, medium-coarse, wet, loose

Silt (ML)grayish brown, firm to stiff, moist to dry, trace fine sand

End of Boring

0 600000ug/L

5.0

150.0 Well Screen

Filter Pack

15

'

2/5/2009WellType3_Annotations

Page 1

ProjectNumber BoreholeNumbe WellNumber AnnotationNumb Text StartDepth350226.ET.02 MSW-38D4_W 1 1 20" Isolation Ca 8350226.ET.02 MSW-38D4_W 1 2 24" Borehole 5350226.ET.02 MSW-38D4_W 1 3 14" Isolation Ca 11350226.ET.02 MSW-38D4_W 1 4 7" Isolation Cas 14350226.ET.02 MSW-38D4_W 1 5 Well Screen 159350226.ET.02 MSW-38D4_W 1 6 Filter Pack 155350226.ET.02 MSW-38D4_W 1 7 Seal 144350226.ET.02 MSW-38D4_W 1 8 Well Grout 35350226.ET.02 MSW-38D4_W 1 9 Isolation Casin 32350226.ET.02 MSW-38D4_W 1 10 15' 151.83350226.ET.02 MSW-38D4_W 1 11 140' bgs 140350226.ET.02 MSW-38D4_W 1 12 148' bgs 148.33350226.ET.02 MSW-5_Well_ 1 1 20" Isolation Ca 8350226.ET.02 MSW-5_Well_ 1 2 24" Borehole 5350226.ET.02 MSW-5_Well_ 1 3 14" Isolation Ca 11350226.ET.02 MSW-5_Well_ 1 4 8" Isolation Cas 14350226.ET.02 MSW-5_Well_ 1 5 Well Screen 193350226.ET.02 MSW-5_Well_ 1 6 Filter Pack 190350226.ET.02 MSW-5_Well_ 1 7 Seal 180350226.ET.02 MSW-5_Well_ 1 8 Well Grout 35350226.ET.02 MSW-5_Well_ 1 9 Isolation Casin 32350226.ET.02 MSW-5_Well_ 1 10 30' 185350226.ET.02 MSW-5_Well_ 1 11 177.8' bgs 177.8350226.ET.02 MSW-5_Well_ 1 12 181.8' bgs 181.8350226.ET.02 MSW-6_Well 1 1 134' bgs 134350226.ET.02 MSW-6_Well 1 2 14" Isolation Ca 11350226.ET.02 MSW-6_Well 1 3 Well Screen 140350226.ET.02 MSW-6_Well 1 4 Filter Pack 137350226.ET.02 MSW-6_Well 1 5 Seal 132350226.ET.02 MSW-6_Well 1 6 Well Grout 35350226.ET.02 MSW-6_Well 1 7 Isolation Casin 32350226.ET.02 MSW-6_Well 1 8 5' 137.22350226.ET.02 MSW-6_Well 1 9 20" Isolation Ca 8350226.ET.02 MSW-6_Well 1 10 24" Borehole 5350226.ET.02 MSW-6_Well 1 11 126' bgs 126350226.ET.02 MSW-7_Well_ 1 1 114.5' bgs 114.5350226.ET.02 MSW-7_Well_ 1 2 14" Isolation Ca 11350226.ET.02 MSW-7_Well_ 1 3 Well Screen 130350226.ET.02 MSW-7_Well_ 1 4 Filter Pack 127350226.ET.02 MSW-7_Well_ 1 5 Seal 112350226.ET.02 MSW-7_Well_ 1 6 Well Grout 35350226.ET.02 MSW-7_Well_ 1 7 Isolation Casin 32350226.ET.02 MSW-7_Well_ 1 8 15' 117.5350226.ET.02 MSW-7_Well_ 1 9 20" Isolation Ca 8350226.ET.02 MSW-7_Well_ 1 10 24" Borehole 5350226.ET.02 MSW-7_Well_ 1 11 109.5' bgs 109.5


Page 2

EndDepth TextOffset Offset Side Orientation Symbol8 18 10 2 Vertical 25 21 12 2 Vertical 2

11 15 7 2 Vertical 214 12 4 2 Vertical 2

159 6 0 2 Horizontal 2155 6 2 2 Horizontal 2144 6 4 2 Horizontal 2

35 12 1.5 2 Vertical 232 15 8 2 Vertical 2

166.83 -3 0 6 Vertical 4140 -10 -5 6 Vertical 2

148.33 -7 -5 6 Vertical 28 18 10 2 Vertical 25 21 12 2 Vertical 2




215 -3 0 6 Vertical 4177.8 -10 -5 6 Vertical 2181.8 -7 -5 6 Vertical 2

134 7 -5 6 Vertical 211 15 7 2 Vertical 2



142.22 -3 0 6 Vertical 48 18 10 2 Vertical 25 21 12 2 Vertical 2

126 10 -5 6 Vertical 2114.5 7 -5 6 Vertical 2

11 15 7 2 Vertical 2130 4 0 2 Horizontal 2127 4 2 2 Horizontal 2112 8 4 2 Horizontal 2



109.5 10 -5 6 Vertical 2


Page 3

SymbolSize LineColor LineWidth LineStyle8 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 0


Page 4

ProjectNumber BoreholeNumbe WellNumber AnnotationNumb Text StartDepth350226.ET.02 MSW-8_Well 1 1 20" Isolation Ca 8350226.ET.02 MSW-8_Well 1 2 24" Borehole 5350226.ET.02 MSW-8_Well 1 3 14" Isolation Ca 11350226.ET.02 MSW-8_Well 1 4 7" Isolation Cas 14350226.ET.02 MSW-8_Well 1 5 Well Screen 195350226.ET.02 MSW-8_Well 1 6 Filter Pack 190350226.ET.02 MSW-8_Well 1 7 Seal 185350226.ET.02 MSW-8_Well 1 8 Well Grout 35350226.ET.02 MSW-8_Well 1 9 Isolation Casin 32350226.ET.02 MSW-8_Well 1 10 25' 192350226.ET.02 MSW-8_Well 1 11 183' bgs 183350226.ET.02 MSW-8_Well 1 12 188' bgs 188350226.ET.02 MW-31D4_Well 1 1 20" Isolation Ca 8350226.ET.02 MW-31D4_Well 1 2 24" Borehole 5350226.ET.02 MW-31D4_Well 1 3 14" Isolation Ca 11350226.ET.02 MW-31D4_Well 1 4 8" Isolation Cas 14350226.ET.02 MW-31D4_Well 1 5 173.58' bgs 173.58350226.ET.02 MW-31D4_Well 1 6 191.58' bgs 191.58350226.ET.02 MW-31D4_Well 1 7 Well Screen 167350226.ET.02 MW-31D4_Well 1 8 Filter Pack 163350226.ET.02 MW-31D4_Well 1 9 Seal 159350226.ET.02 MW-31D4_Well 1 10 Well Grout 35350226.ET.02 MW-31D4_Well 1 11 Isolation Casin 32350226.ET.02 MW-31D4_Well 1 12 5' 163.58350226.ET.02 MW-31D4_Well 1 13 156.58' bgs 156.58350226.ET.02 MW-31D4_Well 1 14 160.58' bgs 160.58350226.ET.02 MW-35D3_Well 1 1 128.42' bgs 128.42350226.ET.02 MW-35D3_Well 1 2 Well Screen 140350226.ET.02 MW-35D3_Well 1 3 Filter Pack 143350226.ET.02 MW-35D3_Well 1 4 Seal 125350226.ET.02 MW-35D3_Well 1 5 Well Grout 35350226.ET.02 MW-35D3_Well 1 6 14" Isolation Ca 11350226.ET.02 MW-35D3_Well 1 7 Isolation Casin 32350226.ET.02 MW-35D3_Well 1 8 15' 131.42350226.ET.02 MW-35D3_Well 1 9 20" Isolation Ca 8350226.ET.02 MW-35D3_Well 1 10 24" Borehole 5350226.ET.02 MW-35D3_Well 1 11 119.42' bgs 119.42350226.ET.02 MW-36D4_Well 1 1 20" Isolation Ca 8350226.ET.02 MW-36D4_Well 1 2 24" Borehole 5350226.ET.02 MW-36D4_Well 1 3 14" Isolation Ca 11350226.ET.02 MW-36D4_Well 1 4 7" Isolation Cas 14350226.ET.02 MW-36D4_Well 1 5 Well Screen 215350226.ET.02 MW-36D4_Well 1 6 Filter Pack 208350226.ET.02 MW-36D4_Well 1 7 Seal 198350226.ET.02 MW-36D4_Well 1 8 Well Grout 35350226.ET.02 MW-36D4_Well 1 9 Isolation Casin 32


Page 5

EndDepth TextOffset Offset Side Orientation Symbol8 18 10 2 Vertical 25 21 12 2 Vertical 2




217 -3 0 6 Vertical 4183 -10 -5 6 Vertical 2188 -7 -5 6 Vertical 2



173.58 -7 -5 6 Vertical 2191.58 -7 -5 6 Vertical 2



168.58 -3 0 6 Vertical 4156.58 -10 -5 6 Vertical 2160.58 -7 -5 6 Vertical 2128.42 7 -5 6 Vertical 2


35 12 2 2 Vertical 211 15 7 2 Vertical 232 15 8 2 Vertical 2


119.42 10 -5 6 Vertical 28 18 10 2 Vertical 25 21 12 2 Vertical 2





Page 6

SymbolSize LineColor LineWidth LineStyle8 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 08 0 1 0


Page 7

ProjectNumber BoreholeNumbe WellNumber AnnotationNumb Text StartDepth350226.ET.02 MW-36D4_Well 1 10 30' 205.02350226.ET.02 MW-36D4_Well 1 11 194' bgs 194.02350226.ET.02 MW-36D4_Well 1 12 202' bgs 202.02


Page 8

EndDepth TextOffset Offset Side Orientation Symbol235.02 -3 0 6 Vertical 4194.02 -10 -8 6 Vertical 2202.02 -7 -5 6 Vertical 2


Page 9

SymbolSize LineColor LineWidth LineStyle8 0 1 08 0 1 08 0 1 0

TABLE A-1Isolation Casing DepthsVelsicol Sentry Wells

Sentry WellGround Surface

Elevation (feet amsl)

20" Isolation Casing Depth (feet

bgs)

14" Isolation Casing Depth

(feet bgs)

8" Isolation Casing Depth

(feet bgs)MSW-5 722.108 56 78 148MSW-6 728.787 37 68 ---MSW-7 727.205 47 96 ---MSW-8 736.940 45 88 162*MW-31D4 730.585 51 78 126MW-35D3 726.823 30 86 ---MSW-36D4 738.281 40 93 196*MSW-38D4 724.340 35 95 140*Notes:--- No casing installed * 7" isolation casing amsl- above mean sea levelbtoc- below top of casing

TABLE A-2Construction SpecificationsVelsicol Sentry Wells

Sentry Well TOC Elevation (feet amsl)

Ground Surface Elevation

(feet amsl)

Total Well Depth (feet btoc)

Screen Length (feet)

Screen Top Elevation

(feet amsl)

Screen Tip Elevation

(feet amsl)

Pump Intake Elevation

(feet amsl)MSW-5 721.750 722.108 214.80 30 536.95 506.95 521.95MSW-6 728.591 728.787 142.22 5 591.37 586.37 588.87MSW-7 726.981 727.205 132.50 15 609.48 594.48 601.98MSW-8 736.492 736.940 217.09 25 544.40 519.40 531.90MW-31D4 730.369 730.585 168.58 5 566.79 561.79 564.29MW-35D3 726.667 726.823 146.42 15 595.25 580.25 587.75MSW-36D4 737.951 738.281 235.02 30 532.93 502.93 517.93MSW-38D4 724.174 724.340 166.83 15 572.34 557.34 564.84Notes:--- No casing installed * 7" isolation casing TOC- top of casingamsl- above mean sea levelbtoc- below top of casing

Appendix B Hydraulic Conductivity Testing (Slug Tests)

APPENDIX B

Hydraulic Conductivity Testing (Slug Tests)

Rising head slug tests were performed at each sentry well between March 26 and March 28, 2007. The rising head slug tests were accomplished by lowering the head of water in each sentry well and monitoring the recovery of the groundwater elevation to the static water level. The water level was lowered by the use of an air displacement device. The recovery of the groundwater was measured with an In-Situ PXD-261 pressure transducer and recorded with a Hermit 3000 data-logger. The procedure for running the slug tests was as follows:

1. The initial depth to water was measured.

2. The air displacement apparatus was connected to the wellhead using a 2-inch flexible coupling.

3. The pressure transducer was installed and secured and the well head device was sealed.

4. The initial height of water column above pressure transducer was recorded.

5. An air compressor was used to pressurize the well head device. This is the physical action that lowered the water column.

6. The air pressure was released by opening a ball valve on the well head device (similar to instantaneous slug removal/introduction from more standard test methods). Data collection was initiated at the time of air pressure release.

7. The individual tests were secured when sufficient recovery (approximately 90%) was observed.

8. Replicate tests were performed as determined by the field geologist.

The slug test data was analyzed using AQTESOLV ® for Windows Version 3.50-Professional (HydroSOLVE Inc., 2003). Hydraulic conductivity solutions were completed using both the Bower-Rice and Hvorslev Methods. The results for individual slug test replicates are included. The hydraulic conductivity results for individual slug test replicates, mean values for the replicates completed at each sentry well, mean values for all slug tests, and mean values for the wells completed in the Lower Unit are summarized in the attached table.

1

Appendix C Data Quality Evaluation Reports

T E C H N I C A L M E M O R A N D U M

St. Louis, Michigan City Wells and Sentry Wells Quarterly Sampling – February 2007 Data Review, Velsicol Chemical Site PREPARED FOR: Rebecca Frey/USEPA, Region 5

PREPARED BY: Shannon Greene/CH2M HILL

Heather Hodach/CH2M HILL COPIES TO: Gina Bayer/CH2M HILL

Theo von Wallmenich/CH2M HILL Rob Stryker/CH2M HILL

DATE: April 27, 2007 This memorandum presents a review of the results from the St. Louis, Michigan City Wells, Sentry Wells, and MW 30I and MW30D samples collected February 20-25, 2007.

Twenty-four groundwater samples were collected and analyzed for one or more of the following:

• Volatile organic compounds (VOCs) • Semi-volatile organic compounds (SVOCS) • Pesticides • Polychlorinated Biphenyls (PCBs) • Metals • Para-Chlorobenzene Sulfonic Acid (pCBSA)

The sampling was conducted by CH2M HILL and the analyses, excluding pCBSA, were performed by PEL Laboratories, Inc., of Tampa, Florida. The analysis for pCBSA was performed by Severn Trent Laboratories of Sacramento, California.

The data were reviewed by CH2M HILL to assess their analytical accuracy, precision, and completeness using the criteria established in the USEPA Contract Laboratory Program National Functional Guidelines for Organic Data Review (October 1999) and USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review (October 2004) . Data quality control (QC) summary forms and data reports were reviewed. Data qualifiers were added when the QC data indicated a potential bias and/or lack of precision. The approach to data qualification is discussed below.

Standard data qualifiers were used to indicate deviations from the validation acceptance criteria. Data qualifiers can also reflect impacts of the sample matrix and blank contamination. When multiple flags are applied to specific sample method/matrix/analyte combinations, the most severe flag becomes the final flag. The data qualifiers are defined as follows:

[U] The analyte was analyzed for, but was not detected above the method detection limit (MDL).

1

VELSICOL DATA REVEIW

[UJ] The analyte was not detected above the MDL, however, the MDL is approximate, and may or may not represent the actual limit of detection.

[J*] Estimated concentration. The associated numerical value is the approximate concentration of the analyte in the sample. The estimated concentration is a result of an analyte being detected at a concentration above the MDL but below the reporting limit (RL).

[JQ] The analyte was positively identified; the reported value is estimated due to a quality control deficiency

[R] The result is unusable due to serious deficiencies in the ability to analyze the sample and meet acceptance criteria. The presence or absence of the analyte cannot be verified.

The analytical data was reviewed for the following parameters:

• Completeness (were all the samples analyzed for the requested analytical parameters) • Holding times prior to extraction and analysis • Instrument tuning criteria (where applicable) • Initial calibration and continuing calibration precision and accuracy • Laboratory control sample (LCS) precision and accuracy • System monitoring compound recovery accuracy • Blank contamination and, if any, its impact on the analytical results • Matrix spike/matrix spike duplicate (MS/MSD) precision and accuracy • Field duplicate precision • Overall quality of data

The data found to be acceptable, except where noted below. Data qualifications are summarized in the attached tables.

VOCs by SW-846 8260 Methyl acetate in Sample Delivery Group (SDG) 250637 had a relative percent difference (RPD) between the matrix spike (MS) and matrix spike duplicate (MSD) results above the required upper limit. The recoveries were acceptable, and the analyte was not detected in the samples in this SDG, therefore no corrective action was taken.

SVOCs by SW-846 8270 Numerous lab control sample (LCS) recoveries were below the applicable QC limits for SDGs 2506026, 2506037 and 2506059. Non-detected sample results within these SDGs were flagged “UJ”. SDG 2506059 had an LCS recovery for Hexachlorocyclopentadiene below 10%, which resulted in “R” flags for the non-detects in the associated samples.

The surrogate, phenol-d5, reported several recoveries below the applicable QC limits for SDGs 2506026 and 2506037. No qualifications were applied to the associated samples since based on the USEPA Contract Laboratory Program National Functional Guidelines for Organic Data Review (October 1999), data are not qualified with respect to surrogate recovery unless two or more semivolatile surrogates are out of specification.

2


The MS/MSD samples associated with SDGs 2506026 and 2506059 contained numerous percent recoveries that were below the QC limits. The associated native samples within these SDGs contained non-dectected results which were qualified “UJ”.

Pesticides by SW-846 8081 The MS/MSD samples associated with SDG 2506026 contained a percent recovery below the QC limit for 2, 4’-DDE. The associated native sample related to this SDG contained non-detected result-which was qualified “UJ”.

PCBs by SW-846 8082 All QC data were within applicable limits.

Metals by SW-846 6010B, 7470A (Mercury), 9012 (Cyanide) Several analytes in the preparation blanks (PBs) and continuing calibration blanks (CCBs) in SDGs 2506026, 2506037 and 2506059 were reported to contain estimated concentrations in the blanks above the MDLs. The equipment blank (EB) in SDG 2506059 was also reported to have contaminants above the MDL. Sample results less than 5 times the highest concentration found in any blank were qualified “U”. Some of the sample results were greater than 5 times the highest blank concentration, but were qualified “JQ”, because they were below the RL.

The MS/MSD samples associated with SDG 2506059 contained calcium with a percent recovery that was outside the QC limits. The parent sample result was found to be 4 times greater than the amount of spike added to the MS/MSD, and was therefore not qualified.

The percent difference for manganese in SDG 2506059 was found to be outside the acceptable QC criterion for the ICP serial dilution. The associated data were flagged “JQ”.

para-Chlorobenzene Sulfonic Acid (pCBSA) All QC data were within applicable limits.

Quantitation and Sensitivity A “J*” qualifier was used in the validation process to indicate when a reported concentration is detected below the RL but above the MDL in the attached tables. The MDL is the minimum concentration of an analyte that can be measured and reported with 99% confidence that the analyte concentration is greater than zero. The MDLs for these samples were determined in laboratory reagent grade water that is free of matrix effects. Concentrations reported less than the RL meet the method identification criteria but the reported concentration is estimated. As the reported concentration for a given analyte approaches the MDL, the overall uncertainty increases and should be evaluated cautiously.

Conclusions The results of one semi-volatile analyte (Hexachlorocyclopentadiene) were rejected due to exceedingly low LCS recovery. The presence or absence of this analyte in the samples could not be verified. Several other SVOCs that were not detected in the samples were qualified “UJ” due to low LCS recoveries, indicating the potential for the laboratory’s inability to

3


4

detect the analytes at the reported MDLs. The rest of the qualifications of the SVOCs and one pesticide were attributed to potential matrix effects as evident in the low MS/MSD recoveries. Some low-level metals found in samples were attributed to laboratory contamination as evident in the blank results. Except for Hexachlorocyclopentadiene, the validated analytical results are considered usable for making project decisions.

References USEPA. 1999. Contract Laboratory Program National Functional Guidelines for Organic Data Review. October.

USEPA. 2004. Contract Laboratory Program National Functional Guidelines for Inorganic Data Review. October.

T E C H N I C A L M E M O R A N D U M

Velsicol Chemical/Pine River Site, St. Louis, Michigan Vertical Aquifer Samples – Data Evaluation Report PREPARED FOR: Rebecca Frey/USEPA, Region 5

PREPARED BY: Shannon Greene/CH2M HILL

Heather Hodach/CH2M HILL COPIES TO: Gina Bayer/CH2M HILL

Theo von Wallmenich/CH2M HILL Rob Stryker/CH2M HILL

DATE: June 25, 2007 This memorandum presents the review of the results from the St. Louis, Michigan Vertical Aquifer Samples (VAS samples) collected during installation of eight sentry monitoring wells between November 27, 2006 and February 16, 2007.

Thirty-four VAS samples (including four field duplicates) were collected and analyzed for the following:

• Volatile organic compounds (VOCs) by SW-846 8260B

• Semi-volatile organic compounds (SVOCs) by SW-846 8270C

• Total DDT (specifically 2,4’-DDD, 2,4’-DDE, 2,4’-DDT, 4,4’-DDD, 4,4’-DDE, and 4,4’-DDT isomers) by SW-846 8081A

• Hexabromobenzene (HBB) and Hexabromobiphenyl (PBB) by SW-846 8082

• TAL-Metals by SW-846 6010B, 7470A (Mercury), 9012B (Cyanide), 7060 (Arsenic)

• para-Chlorobenzene Sulfonic Acid (pCBSA) by SW-846 8321A

In addition to the VAS samples, one Investigation-Derived Waste (IDW) sample was collected and analyzed.

The sample collection was conducted by CH2M HILL field teams. The samples were sent to PEL Laboratories, Inc., of Tampa, Florida for all analyses except pCBSA. The pCBSA analyses were conducted by Severn Trent Laboratories (STL) of Sacramento, California. The data were reviewed by CH2M HILL chemists to assess their analytical accuracy, precision, and completeness using the criteria established in the USEPA Contract Laboratory Program National Functional Guidelines (NFG) for Organic Data Review (October 1999) and USEPA Contract Laboratory Program National Functional Guidelines (NFG) for Inorganic Data Review (October 2004). Data qualifiers were appended to specific sample analytes. The appended qualifiers as per NFG guidance are discussed in the appropriate sections further in this document.

Data qualifiers were used as a means of classifying the data as to their conformance to the quality assurance (QA) process and QC measurement requirements. Multiple flags are

1


2

routinely applied to specific sample method/matrix/analyte combinations, but there will only be one final flag. The final flag is applied to the data and is the most conservative of the validation flags. The primary data qualifiers are defined as follows:

[U] The analyte was analyzed for, but was not detected above the method detection limit (MDL).

[UJ] The analyte was not detected above the MDL, however, the MDL is approximate, and may or may not represent the actual limit of detection.

[J*] The associated numerical value is the approximate concentration of the analyte in the sample. The value is estimated due to the analyte being detected at a concentration below the reporting limit (RL).

[JQ] The associated numerical value is estimated due to a quality control deficiency.

[R] The result is unusable due to serious deficiencies in the ability to analyze the sample and meet acceptance criteria. The presence or absence of the analyte cannot be verified.

The analytical data were reviewed against the following QA program and QC statistical measurements:

• Completeness (were all the samples analyzed for the requested analytical parameters) • Holding times related to extraction and analysis • Instrument tuning criteria (where applicable) • Initial and continuing calibration accuracy • Laboratory control sample (LCS) method accuracy and precision (if a laboratory control

sample duplicate (LCSD) was also analyzed) • System monitoring compound recoveries • Blank contamination and, if any, its impact on the analytical results • Matrix spike/matrix spike duplicate (MS/MSD) accuracy and precision (of the matrix) • Field duplicate precision • Overall assessment of data

The QC measurements were within acceptable control limits accept where noted below. Any data qualifications and flagging are summarized in the attached tables. Table 1 lists the sample delivery groups (SDGs), and the associated samples.

TABLE 1 Sentry Well Sample Summary Velsicol Chemical/Pine River Site; St, Louis, MI SDG Associated Samples SAS ID Numbers

2505340 MSW-38D4-27-31-GW 07CV08-01

2505346 MSW-7-37-41-GW 07CV08-03

MSW-7-37-41-GW(D) 07CV08-04

2505377 MSW-6-26-26.5-GW, 07CV08-22

MW-35D3-14.5-17-GW 07CV08-23

2505387 MSW-5-42-47-GW 07CV08-25


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TABLE 1 Sentry Well Sample Summary Velsicol Chemical/Pine River Site; St, Louis, MI SDG Associated Samples SAS ID Numbers

2505428 MW-31D4-10-11-GW 07CV08-27

MW-31D4-42-47-GW 07CV08-29

2505448 MSW-8-29-37-GW 07CV08-30

MSW-8-29-37-GW(D) 07CV08-31

2505582 MW-31D4-61-68-GW 07CV08-45

2505633 MSW-8-80-82-GW 07CV08-46

2505648 MSW-36D4-78-88-GW 07CV08-48

MSW-36D4-78-88-GW(D) 07CV08-49

2505668 MSW-6-58-60-GW 07CV08-51

MSW-5-118-128-GW 07CV08-52

2505675 IDW-FRACTANK01 07CV08-54

MSW-5-128-132-GW 07CV08-56

2505716 MSW-7-88-91-GW 07CV08-57

MW-31D4-88-98-GW 07CV08-58

MW-31D4-98-108-GW 07CV08-59

MW-31D4-108-118-GW 07CV08-60

2505733 MW-35D3-78-80-GW 07CV08-62

2505829 MW-31D4-136-146-GW 07CV08-76

MW-31D4-146-156-GW 07CV08-77

MW-31D4-156-166-GW 07CV08-78

2505855 MSW-5-177-187-GW 07CV08-80

MSW-5-177-187-GW(D) 07CV08-81

2505894 MSW-8-147-149-GW 07CV08-83

2505975 MSW-38D4-112-117-GW 07CV08-84

MSW-36D4-157-167-GW 07CV08-85

MSW-38D4-117-127-GW 07CV08-87

MSW-38D4-127-133-GW 07CV08-88

2506004 MSW-36D4-177-187-GW 07CV08-89

MSW-38D4-147-157-GW 07CV08-90


4

VOCs by SW-846 8260B The initial calibration verification (ICV) sample resulted in a relative percent difference (RPD) that exceeded the QC limits for methyl acetate in SDG 2505716. Detected concen-trations of this analyte within the field samples were qualified and flagged “JQ” as estimated. Non-detected sample results were qualified and flagged “UJ” as undetected and estimated in quantity.

The continuing calibration verification (CCV) samples in SDG 2505675 reported percent differences that exceeded the QC limit for 4-methyl-2-pentanone. The CCV samples in SDG 2505829 exceeded the QC limits for carbon disulfide, 2-butanone, 4-methyl-2-pentanone and 2-hexanone. Detected concentrations of these analytes, not previously qualified due to another QC issue, were qualified and flagged “JQ” as estimated in quantity. Non-detected sample results, not previously qualified due to another QC issue, were qualified and flagged “UJ” as undetected and estimated in quantity.

Several percent recoveries and RPDs were reported above the applicable QC limits for the LCS samples within the following SDGs: 2505340, 2505346, 2505377, 2505582, 2505668, 2505675, 2505716 and 2505829. Non-detected concentrations of these analytes that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and detected concentrations of these analytes were qualified and flagged “JQ” due to a potential low bias. Non-detected concentrations of these analytes that had a recovery above the applicable QC limits were not qualified.

SVOCs by SW-846 8270C Several percent recoveries and RPDs were reported above the applicable QC limits for the LCS samples within the following SDGs: 2505340, 2505346, 2505377, 2505387, 2505428, 2505448, 2505633, 2505648, 2505675, 2505733 and 2506004. Non-detected concentrations of these analytes that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and detected concentrations of these analytes were qualified and flagged “JQ” due to a potential low bias. Non-detected concentrations of these analytes that had a recovery above the applicable QC limits were not qualified. More than half of the analytes in the LCS samples were not within the recovery criteria for the following SDGs: 2505582, 2505716, 2505829, 2505855, 2505894 and 2505975. All non-detected sample results that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and all detected concentrations were qualified and flagged “JQ”. Several secondary source calibration percent differences were above the applicable QC limits in SDGs 2505448, 2505582 and 2505855. Detected concentrations of these analytes, not previously qualified due to another QC issue, were qualified and flagged “JQ” as estimated in quantity. Non-detected concentrations of these analytes, not previously qualified due to another QC issue, were qualified and flagged “UJ” as undetected and estimated in quantity.

Pesticides by SW-846 8081A The LCS reported a RPD for 2,4’-DDE below the applicable QC limits for the following SDGs: 2505340, 2505346, 2505377, 2505387, 2505668 and 2505716. The RPD for 4,4’-DDT within SDG 2505855 for the LCS sample was above the applicable QC limits. Non-detected concentrations of these analytes that had a recovery above 10% and below the lower QC


5

limit were qualified and flagged “UJ” and detected concentrations of these analytes were qualified and flagged “J” due to a potential low bias. Non-detected concentrations of these analytes that had a recovery above the applicable QC limits were not qualified.

The surrogates associated with samples IDW-FRACTANK01 and MW-35D3-78-80-GW contained percent recoveries that exceeded the QC limits. Non-detected sample results that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and detected concentrations were qualified and flagged “JQ” due to a potential low bias. Non-detected sample results that had a recovery above the applicable QC limits were not qualified.

The dual column confirmation check for SDG 2505675 also contained percent differences that exceeded the QC limit for 4,4’-DDD. No qualifications were applied to this analyte since it was previously flagged for another QC issue.

PCBs by SW-846 8082 The LCS reported a RPD for Hexabromobiphenyl above the applicable QC limits for SDG 2506004. Non-detected concentrations of this analyte that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and detected concentrations of this analyte were qualified and flagged “JQ” due to a potential low bias. Non-detected concentrations of this analyte that had a recovery above the applicable QC limits were not qualified.

Metals by SW-846 6010B, 7470A (Mercury), 9012B (Cyanide) Numerous continuing calibration blanks (CCB) were reported to contain estimated concentrations of several analytes in the blanks above the MDL for the following SDGs: 2505340, 2505346, 2505377, 2505387, 2505428, 2505448, 2505648, 2505668, 2505855, 2505675, 2505716, 2505733, 2505829, 2505975 and 2506004. The preparation blank (PB) for antimony and lead in SDG2505975 and the PB for cadmium in SDG 2506004 were reported to contain estimated concentrations in the blanks above the MDL. Sample results less than 5 times the amount found in any blank were qualified as “U”, not detected above the MDL and is therefore considered not detected. Sample results found to be greater than 5 times the amount found in the blank are not qualified. The MS/MSD percent recovery for antimony was outside the QC limits in SDG 2505387. Antimony and arsenic were outside the QC limits for the MS/MSD percent recovery in SDG 2505633. The parent sample result was found to be 4 times less than the amount of spike added to the MS/MSD, and therefore non-detected sample results, not previously qualified due to another QC issue, that had a recovery above 10% and below the lower QC limit were qualified and flagged “UJ” and detected concentrations were qualified and flagged “J”. The percent difference for zinc was found to be outside the acceptable QC criterion in SDGs 2505387 and 2505716 for the ICP serial dilution. Arsenic was found to be outside the QC limit for the ICP serial dilution in SDGs 2505648 and 2505975. The associated data were therefore qualified as estimated “JQ”.

para-Chlorobenzene Sulfonic Acid (pCBSA) by SW-846 8321A All QC measurements were within applicable limits, therefore no qualification of the data was required.


6

Conclusions Qualified data, if not rejected, can still be used to make project decisions and is considered to be compliant data. Thus the analytical results are acceptable as reported unless otherwise qualified herein.

References USEPA. 1999. Contract Laboratory Program National Functional Guidelines for Organic Data Review. October.

USEPA. 2004. Contract Laboratory Program National Functional Guidelines for Inorganic Data Review. October.

Appendix D Historical Well Logs

CITY WELL #6

CITY WELL #8

CITY WELL #7

CITY WELL #5

CITY WELL #4

CITY WELL #1

MW-35D3

MSW-6

MSW-7

MSW-8

MSW-5

MSW-38D4

MW-31D4

MSW-36D4

MCC #3TD = 1316

Drilled Between 1890 and 1910

MCC PW#2TD = 221

Drilled 1957

MCC Well#13TD = Unknown

Unknown Drill DateAbandoned 1981

MCC TW#57BTD = 262

Drilled 1957

MCC Well#9TD = 4545Drilled 1938Abandoned 1981

MCC Well#8TD = 1307Drilled Before 1938

City TW#60ATD = 144

Drilled 1960

City TW#59CTD = 262

Drilled 1959

City TW#59ATD = 224

Drilled 1959

City TW#58ETD = 272

Drilled 1958

MCC Well#10TD = 3460Drilled 1940

Unknown Brine WellTD = UnknownUnknown Drill Date

Magnetic Mineral SpringsTD = 270Drilled 1869

MCC TW#4TD = 332Drilled 1954

City TW#3TD = 241Drilled 1945

MCC TW#57CTD = 575

Drilled 1957

MCC TW#57ATD = 262

Drilled 1957

FIGURE 1SENTRY WELL AND HISTORICAL

WELL LOCATION MAPVELSICOL / PINE RIVER SITE

ST. LOUIS, MICHIGAN

NOTES:

1. TD MEANS TOTAL DEPTH.2. WELL DEPTHS IN FEET.

Legend

Historical Well Locations

Sentry Well / New Monitoring Well

City Well

0 1,000500Feet

File Path: E:\Velsicol\GIS_Data\Velsicol\MXDs\2007_Report\Vel_Sentry_Well_Historic_Well Locations.mxd, Date: June 26, 2007, User: MPETERSH

Velsicol Historical Boring Logs

Approx. LocatedPlugging Total Current On Former

Historical Well Section Date Drilled Record? Depth (ft) Northing Easting GSE Plant Site? How Located? NotesCity TW#3 sec. 24 1945 N 241 697,827 13,058,196 730.0 No Well log coordinatesCity TW#58E sec. 25 10/29/1958 N 272 695,079 13,056,226 720.0 No Well log coordinatesCity TW#59A sec. 25 4/16/1959 N 224 691,832 13,057,385 741.0 No Well log coordinatesCity TW#59C sec. 25 9/11/1959 N 262 691,888 13,057,385 741.0 No Well log coordinatesCity TW#60A sec. 25 2/22/1960 N 144 695,116 13,056,199 720.0 No Well log coordinatesMagnetic Mineral Springs

sec. 24 1869 N 270 696,912 13,059,331 712.0 No Well log & 1924 Sanborn

First located on 1884 Sanborn

MCC TW#4 sec. 24 6/8/1954 N 332 697,074 13,057,978 729.5 Yes Well log coordinatesMCC TW#57A sec. 24 4/5/1957 N 262 697,068 13,057,567 730.5 Yes Well log coordinatesMCC TW#57B sec. 24 5/15/1957 N 262 696,949 13,056,839 730.0 Yes Well log coordinatesMCC TW#57C sec. 24 8/2/1957 N 575 697,582 13,057,565 728.0 Yes Well log coordinatesMCC PW#2 sec. 24 8/14/1957 N 221 697,114 13,057,978 728.0 Yes Well log coordinatesMCC #3 sec. 24 1890-1910 N 1316 697,388 13,057,158 731.2 Yes Well log & 1950 MCC

mapMCC Well#8 sec. 13 <1938 N 1307 704,187 13,057,900 745.0 No Well log coordinatesMCC Well#9 sec. 24 9/9/1938 Y - 1981 4545 698,400 13,055,040 746.0 No Well log & 1973 topo "Oil Well" on 1973 topoMCC Well#10 sec. 13 8/10/1940 N 3460 701,857 13,056,950 734.0 No Well log & 1973 topo "Brine Well" on 1973 topo

MCC Well#13 sec. 24 unknown Y - 1981 4360 697,474 13,057,396 731.2 Yes 1950 MCC map No well log found, depth from plugging record

Unknown Brine Well

sec. 13 unknown N unknown 705,830 13,056,895 748.0 No 1973 topo "Brine Well" on 1973 topo

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