Westbay Well - NASA€¦ · Figure 2. The borehole was completed with 1.5-inch (in.) inside diameter (1.9-in. outside diameter) schedule 80 polyvinyl chloride (PVC) Westbay MP38 casing

National Aeronautics and Space Administration

Lyndon 8. Johnson Space Center White Sands Test Facility P.O. Box 20 Las Cruces, NM 88004-0020

Reply to Attn of: RE-17-157

Mr. John E. Kieling, Chief New Mexico Environment Department Hazardous Waste Bureau

December 28 2017

2905 Rodeo Park Drive East, Building 1 Santa Fe, NM 87505

Subject: Well Reconfiguration Work Plan for Well BLM-30

On March 30, 2017, NASA submitted a package of documents that included the Westbay Well Reconfiguration Work Plan for Well BLM-30. In that work plan, NASA proposed to remove the Westbay sampling system from the BLM-30 borehole, evaluate the borehole using several methods, and replace the Westbay system with a Water FLUTe multiport sampling system. NMED approved NASA' s work plan on October 4, 2017 with modifications and directed NASA to revise the work plan to include completion of the borehole as a conventional cased and screened monitoring well. The enclosed work plan provides information on why that approach is not possible and presents NASA's recommended approach to achieve NASA and NMED groundwater monitoring and data quality objectives at the BLM-30 location.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. If you have any questions or comments concerning this submittal, please contact Mike Zigmond at 575-524-5484.

A -r;,,~ Timothy ~is Chief, Environmental Office

Enclosure

cc: Mr. Gabriel Acevedo Hazardous Waste Bureau New Mexico Environment Department 2905 Rodeo Park Drive East, Building 1 Santa Fe, NM 87505

NASA White Sands Test Facility

Well Reconfiguration Work Plan for Well BLM-30 1

Well Reconfiguration Work Plan for Well BLM-30

Introduction On March 29, 2016, the New Mexico Environment Department (NMED) issued the Approval NASA WSTF Periodic Monitoring Report Fourth Quarter 2015 (NMED, 2016a). In the approval, NMED directed the National Aeronautics and Space Administration (NASA) to replace several groundwater monitoring wells because of uncertainty about the source of detections of N-nitrosodimethylamine (NDMA) and trichloroethene (TCE). On March 30, 2017, NASA submitted a package of documents that included the Westbay Well Reconfiguration Work Plan for Well BLM-30 (NASA, 2017). In that work plan, NASA proposed to remove the Westbay®1 sampling system from White Sands Test Facility (WSTF; Figure 1) well BLM-30, evaluate the borehole using several methods, and replace the Westbay system with a Water FLUTe™ multiport sampling system. NMED approved NASA’s work plan on October 4, 2017. Modification 2 in the Approval requires NASA to revise the BLM-30 reconfiguration work plan to address several issues (NMED, 2017b). This work plan is submitted in accordance with the NMED directive and provides specific information to address NMED’s October 4, 2017 requirements.

Well Background and Geological Setting

Westbay multiport monitoring well BLM-30 was installed in 1995 to support horizontal and vertical delineation of the WSTF groundwater contaminant plume. The BLM-30 borehole was drilled to a total depth of 670 feet (ft) below ground surface (bgs), but sloughed to 613 ft bgs. The lithological log for the BLM-30 borehole is provided in Figure 2. The borehole was completed with 1.5-inch (in.) inside diameter (1.9-in. outside diameter) schedule 80 polyvinyl chloride (PVC) Westbay MP38 casing to a total depth of 605 ft bgs with two sampling zones. Each zone is isolated with Westbay casing packers, approximately 10 ft in length, and located in fractured Tertiary rhyolite bedrock (ash fall tuff for top zone and latite/trachyte for bottom zone). Westbay sampling ports are within the packed off sampling zones of the Westbay casing at approximately 475 and 585 ft bgs; however, the top zone at 475 ft has never been sampled due to insufficient groundwater to support sampling. The current BLM-30 well completion diagram is shown in Figure 3. Hydraulic conditions are classified as unconfined, and the most recent calculated depth to water in the 585 ft Westbay sampling port is approximately 544 ft bgs (11/14/2017).

Chemical analytical results for the WSTF contaminants of concern (COCs) TCE, tetrachloroethene (PCE), Freon 113, and Freon 11 at BLM-30 have historically been detected in parts per trillion (ppt) for NDMA and parts per billion (ppb) for the other COCs. Figure 4 shows the location of BLM-30 in relation to the NDMA and TCE groundwater plumes.

Project Discussion NASA investigated the feasibility of installing a conventional casing, screen, and filter pack in BLM-30. The diameter of the borehole at BLM-30 is 4.5 in. (Figure 3), which is insufficient for the installation of a conventional monitoring well that complies with the well construction requirements identified in Section 19.3.2 of the NASA Hazardous Waste Permit (Permit; NMED, 2016b). Figure 3 also shows that the original borehole was installed using an 8.5-in. tricone bit to a depth of 390 ft

1 Westbay is a registered trademark of Nova Metrix Ground Monitoring (Canada) Ltd.



bgs. Rhyolite bedrock was reported at 380 ft bgs. A 5-in. diameter surface casing was installed and cement-grouted from 390 ft bgs to the surface. Because the steel surface casing is cemented to approximately 390 ft bgs, overdrilling and removal of the casing is not possible, nor is reaming of the underlying 4.5-in. diameter borehole to a larger diameter. It is therefore not possible to install a conventional cased and screened monitoring well in this borehole as requested by NMED. However, NASA believes that the borehole is stable enough to allow for future monitoring without the installation of a conventional well. NASA has not experienced any problems with turbidity during the lifetime of BLM-30, suggesting a screen and filter pack are not needed.

In the October 4, 2017 letter, NMED states that NASA must perform the proposed borehole transmissivity and geophysical surveys in order to provide additional information with regard any sampling zones in addition to the current zone at 585 ft bgs. NASA will perform the require testing as described in later sections of this plan.

NMED indicated that the revised work plan “…must include a proposed schedule for submittal of a monitoring well reconfiguration status report documenting the results of geophysical and transmissivity surveys… (NMED, 2017b)” The schedule for performing the surveys and submitting the status report is provided in this work plan. NMED also required that NASA determine the final groundwater sampling system configuration and provide the design to NMED for review and approval.

Project Objectives The preliminary objective of reconfiguration activities at WSTF well BLM-30 is to remove the Westbay well casing and evaluate the borehole to identify groundwater sampling locations and to determine the most effective groundwater monitoring system. NASA will coordinate the removal of the Westbay casing by factory-trained personnel, after which the required borehole evaluation methods will be employed to determine groundwater sampling locations and develop an appropriate groundwater sampling system.

The follow-on objective is to reconfigure the borehole at BLM-30 with a sampling system capable of providing quality representative groundwater chemical analytical data (NMED, 2017b; Modification 2). The selected sampling system will allow for the comparison of contaminant data from the previous Westbay system to the purgeable system that replaces it, which supports NASA’s and NMED’s desire to evaluate the representativeness of data from various groundwater sampling systems (NMED, 2017b; Modification 1).

Westbay System Removal

The Westbay system in well BLM-30 was installed in 1995 directly in an open borehole (Figure 3). WSTF environmental personnel will supervise Westbay Instruments personnel and a qualified subcontractor drilling company during Westbay sampling system removal. Westbay Instruments personnel will provide the specialized tools needed to perforate the packers within the sampling system. Following perforation of the packers, the subcontractor drilling company will use a pulling unit to remove the Westbay casing and sampling system components from the borehole. The removal process will be supervised and documented by WSTF Environmental Department contractor personnel.

WSTF Environmental Department contractor personnel will also be responsible for directing and documenting waste management activities, which are discussed further in the Waste Characterization and Management section of this work plan.



Borehole Evaluation Following removal of the Westbay sampling system, WSTF Environmental Department contractor personnel will perform a camera log of the borehole to evaluate its integrity prior to performing additional borehole surveys. The camera log will also help to identify significant fracture zones to support location of groundwater monitoring zones. In addition to the basic camera logging performed by the WSTF Environmental Department contractor, NASA will arrange for the services of a geophysical contractor to perform a suite of geophysical logs, which may include neutron porosity, formation resistivity, spontaneous potential logs, and caliper logs. NASA may also include televiewer logging and flow meter logging to support borehole characterization and location of sampling zones.

Following removal of the Westbay system and subsequent camera log, WSTF Environmental Department contractor and FLUTe personnel will perform a transmissivity profile on the borehole to identify specific locations in the borehole that can be targeted for groundwater sampling. A blank FLUTe liner will be filled with water to provide constant head in order to evert the liner into the borehole. As the blank liner is installed, water is forced from the borehole into the formation through natural flow paths (fractures, permeable beds, etc.; Figure 5). The liner descent rate is controlled by the rate water can flow from the borehole along natural flow paths, and initially is a measure of the transmissivity of the entire borehole. As the liner seals flow paths, changes in the liner velocity indicate the position of each flow path and transmissivity is estimated using the Thiem equation for steady radial flow. Additional information about transmissivity is provided on FLUTe’s website (http://www.flut.com/TransmissivityProfiling/trans_method.html). NASA expects to target one to four transmissive zones in the borehole for future groundwater sampling with an NMED-approved sampling system.

Selection of Monitoring Zones and Sampling System Design

NASA will evaluate the results of the downhole camera log, geophysical surveys, and transmissivity profile to determine the number and location of groundwater sampling zones in the BLM-30 borehole. NASA will then evaluate potential groundwater sampling systems and design a system that allows for the collection of representative groundwater samples from the targeted locations in the borehole. NASA will consider the ability of the replacement sampling system to provide chemical analytical data that can be used to evaluate the representativeness of data as directed in Modification 1 in NMED’s October 4, 2017 Approval.

Waste Characterization and Management

Information related to the characterization, management, and disposition of waste generated during this project is provided in this section. Waste characterization is conducted in accordance with Section II.C (Waste Characterization) and Attachment 12 (Waste Analysis Plan) of the WSTF Hazardous Waste Permit (NMED, 2016b). All waste will be properly managed and disposed of in accordance with NASA procedures and state and federal regulations.

Groundwater is known to be contaminated at concentrations above the applicable regulatory levels at well BLM-30. The Environmental Protection Agency (EPA) has established that groundwater, and other environmental media, is not solid waste, but is subject to regulation as if it were hazardous waste when it contains listed waste (EPA, 1991). By application of the EPA Contained-In Policy, groundwater removed from the contaminated portion of the WSTF plume has been characterized as F001 and F002 listed hazardous waste. Any other material classified as solid waste that

http://www.flut.com/TransmissivityProfiling/trans_method.html



comes into contact with contaminated groundwater is therefore regulated hazardous waste or hazardous debris.

The following waste streams may be generated during the reconfiguration of well BLM-30:

• Westbay system. Components of the Westbay sampling system removed from above the water table at BLM-30 are not contaminated and are characterized as non-hazardous solid waste. Components from below the water table at that have come in contact with contaminated groundwater are hazardous debris.

• Groundwater. Groundwater produced from within the WSTF groundwater plume during borehole evaluation or well reconfiguration is characterized as environmental media containing listed hazardous waste.

• Decontamination fluids. Decontamination fluids such as water and soap solutions used to wash and decontaminate equipment and debris retrieved from above the water table are non-hazardous solid waste. Decontamination fluids generated by cleaning equipment that has contacted potentially contaminated groundwater or debris from below the water table is characterized as hazardous waste.

• Contact waste. Contact waste, or debris, such as used disposable sampling equipment, personal protective equipment, plastic sheeting, and other debris generated from above the water table is non-hazardous solid waste. Contact debris contaminated with groundwater or fluids that originate from the water table is characterized as hazardous waste.

As an alternative to 40 CFR Part 268.40 (2003), the Westbay system components will be treated using high pressure steam or water spray in accordance with under the Alternate Treatment Standards for Hazardous Debris (40 CFR 268.45, 2012). Once the Westbay system components are decontaminated, they will be disposed of as solid waste. Decontamination fluids generated from this activity will be managed as hazardous waste, treated, and disposed of at the Mid-Plume Interception and Treatment System (MPITS).

Contaminated groundwater generated during reconfiguration activities and contaminated decontamination fluids, will be accumulated in appropriately sized containers and managed as hazardous waste. The containers will be managed in accordance with requirements of 20.4.1.300 NMAC and 40 CFR 262.17 (2017). Within permissible accumulation time limits, contaminated water will be transferred to the MPITS for storage, treatment, and discharge. Contact waste, or hazardous debris, that has come into contact with contaminated groundwater will be collected at the end of each working shift and transferred to an appropriate container. All hazardous waste containers will be managed on site in accordance with the requirements of 20.4.1.300 NMAC and 40 CFR 262.17 (2017).

For waste that is characterized as hazardous waste, land disposal restriction notifications, disposal facility profiles, and hazardous waste manifests will be completed as required. Hazardous waste manifested off site will be transported for treatment and disposal at a permitted RCRA Treatment Storage and Disposal Facility. Contaminated groundwater and decontamination water generated during the project will be managed at the WSTF Mid-plume Interception and Treatment



System. If that system is not capable of receiving the waste, it will be disposed of at a permitted RCRA Treatment Storage and Disposal Facility.

Schedule NASA expects to complete the borehole evaluation activities at well BLM-30 and provide the required well reconfiguration status report, including the proposed sampling system design, within 180 days of NMED approval of this work plan. If required, this work plan will be revised and resubmitted to NMED within 30 days of NMED approval of the sampling system design. Installation, testing, and sampling of the replacement groundwater monitoring system will be performed following NMED receipt and approval of the revised work plan (if submitted). If NASA determines installation of an alternate sampling system is not feasible, NASA will submit a work plan to plug and abandon BLM-30 and install a replacement well.

References Applicability of Treatment Standards, 40 C.F.R. § 268.40 (2003).

Conditions for exemption for a large quantity generator that accumulates hazardous waste, 40 C.F.R. 262.17 (2017).

Characteristics of Hazardous Waste, 40 C.F.R. § 261.24 Subpart C (2012). Retrieved from http://www.ecfr.gov/

EPA. (1991, March 26). n.t. (EPA Publication Number RO 11593). Washington, DC: U.S. Environmental Protection Agency. Retrieved from https://yosemite.epa.gov/osw/rcra.nsf/

Flexible Liner Underground Technologies, LLC (FLUTe). (2010, April). Practical Use of Flexible Liner Transmissivity Profiling Results. Alcalde, NM.

Hazardous Waste Management, Environmental Improvement Board, 20.4.1 NMAC (6-14-2000).

NASA Johnson Space Center White Sands Test Facility. (2017a, March 30). Detections of NDMA and TCE in WSTF Groundwater Monitoring Wells BLM-30, PL-5, PL-6, PL-7, PL-8, PL-10, ST-5, and WW-3. Las Cruces, NM.

NMED Hazardous Waste Bureau. (2016a, March 29). Approval NASA WSTF Periodic Monitoring Report Fourth Quarter 2015. Santa Fe, NM.

NMED Hazardous Waste Bureau. (2016b, November 10). Administrative Completeness and Fee Assessment Transmittal of Class 1 Permit Modification Without Prior Approval. Santa Fe, NM.

NMED Hazardous Waste Bureau. (2017a, March). Risk Assessment Guidance for Site Investigations and Remediation. Santa Fe, NM.

NMED Hazardous Waste Bureau. (2017b, October 4). Approval with Modifications Detections of NDMA (N-Nitrosodimethylamine) and TCE (Trichloroethylene) In WSTF Groundwater Monitoring Wells BLM-30, PL-5, PL-6, PL-7, PL-8, PL-10, ST-5, and WW-3. Santa Fe, NM.



Figures


Figure 1 WSTF Location Map

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Figure 2 BLM-30 Lithologic Log

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Comments:

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BOREHOLE LITHOLOGIC LOG

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VolcanicsAndesiteRhyoliteLimestoneShaleConglomerateShale InterbedsLimestone andSandstoneSiltstoneCaliche ClayGravel & Sand QuartziteVolcanic

AlluviumAlluvium

Explanation:

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0 - 30' (9.1 m): Gravel: Light brown to dark brown, clasts typically 0.25 to1 inch. Clasts are subangular to subrounded and predominantly quartzite, limestone, siltstone and minor volcanics. Sample is well sorted, poorlygraded with up to 30 percent reddish brown clay matrix.

30 - 70' (9.1 - 21.3 m): Clayey sandy gravel: Light reddish brown toreddish brown, approximately 30 percent clay, 30 percent coarse sandand 40 percent fine to medium gravel. Gravel clasts vary from 0.25 to 2inches in diameter and are angular to subangular. Clasts are comprisedpredominantly of limestone and siltstone with some minor volcanicspresent.70 - 85' (21.3 - 25.9 m): Sandy gravel: Light brown, with approximately 20 to 30 percent medium sand and 70 to 80 percent fine to medium gravel.Clasts are subangular to subrounded and are comprised predominantly oflimestone and siltstone. Limestone increases with depth.

85 - 95' (25.9 - 29 m): Gravelly sandy clay: Light reddish brown unit with30 to 40 percent gravel and sand, and 60 to 70 percent clay. Clasts aresubangular to subrounded and 0.1 to 0.5 inches in diameter. Clasts arepredominantly moderately graded and moderately sorted limestone.95 - 105' (29 - 32 m): Clayey gravel: Light reddish brown with 30 percentclay and 70 percent gravel. Clasts are subangular and predominantlylimestone with minor amounts of felsic volcanicks.

105 - 180' (32 - 24.4 m): Gravelly sandy clay: Light brown to light reddishbrown unit with 30 percent fine gravel and 70 percent clay. Gravel clastsare subangular to rubrounded and comprised of limestone, quartzite, andgranite.

ALLUVIUM 0 - 375' (0 - 114.3 m):

Santa Fe Group: Cutting samples consist of multicolored clasts with clay-rich intervals colored light brown (5YR 6/4) to moderate brown (5 YR 4/4). Cuttings range in size from much less than 0.8 inch (clay and silt size) to 1.3 inches and average 0.1 to 0.2 inch. Cuttings are subangular toangular. The alluvium is an unconsolidated to moderately consolidated,poorly sorted, pebble to boulder, polygenetic conglomerate. Intermittentclay and caliche-rich intervals are noted in the log. Cutting clastsrepresenting various lithologies occurring in the alluvium a re light gray(N7) to grayish-black (N2) limestone, white (N9) iron-stained rhyolite,moderate reddish brown (10R 4/6) to dusky red 5R 3/4) and greenish-gray (5GY 5/1) siltstone, white (N9) to light gray (N7) quartz, grayish pink(5R 8/2) to moderate pink (5YR 6/1) tuff, blackish red (5R 2/2) andesite,dusky brown (5YR 2/2) sandstone and minor amounts of chert.

BLM-30

670' (204.22 m); sloughed to 613'1401.51 m AMSL 8 1/2" 0-390'; 4 1/2" 390-670'

Larjon Drilling Company

M. Jacobs, M. Russell

Southwest Geophysical Services, Inc.12/21/94 to 1/4/95 (SC) (see comments)

Mud/Air-Foam Rotary

Nominal 5" to 390'NE 1/4 NE 1/4 NW 1/4 Sec. 33, T20S, R3E

J. Gower

Depth to h20

380' (115.82 m); Rhyolite

169811.21N 463249.77E

No E logs available. See hard copies in well file.M. Peterson

AMSL = Above Mean Sea Level

BLM-30

Drilled to TD: 2/24/95 to ~3/10/95SC = Surface casing TD = Total depth

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180 - 200' (24.4 - 64.3 m): Gravel: Light reddish brown unit. Clasts arefined to medium grained and range in size srom 0.1 to 1 inch in size.Cuttings are subrounded, to subangular, well graded and poorly sorted.Predominant lithologies are limestone, siltstone, and rhyolite.

200 - 220' (64.3 - 67.1 m): Clay: Light brown to reddish brown. Graveland sand comprise < 30 percent.

220 - 240' (67.1 - 73.2 m): Gravel: Brown, fine to medium clasts from 0.5to 2 inches in diameter. Sample is relatively well sorted and predominantlithologies are limestone, siltstone, and rhyolite.

240 - 260' (73.2 - 79.3 m): Clay: Light brown to brown with trace to 10percent gravel.

260 - 375' (79.3 - 114.3 m): Gravel: Brown to reddish brown. Clasts arefine to medium grained and subangular to subrounded, moderately to well-graded and poorly sorted. Lithologies are predominantly limestone, siltylimestone, and rhyolitic volcanics. Matrix is slightly cemented.

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375 - 380' (114.3 - 115.8 m): Clay: Light purple in color. Rock chipscomprise less than 20 percent of sample. Upper bedrock surfaceweathered prior to influx of alluvial fan gravels.

415 - 435' (126.5 - 132.6 m): Pumice fragments becoming moreprevalent.

435 - 455' (132.6 - 138.7 m): Clay: Light purple to gray. Clay is totalalteration from a zone characterized by increased pumice fragments.

455 - 470' (138.7 - 143.3 m): Clay: Light purple to gray. Highly alteredzone within crystal vitric tuff.

470 - 485' (143.3 - 147.8 m): Rhyolitic ash fall tuff: Unit is aphanitic andmicrocrystalline with disseminated biotite visible.

485 - 500' (147.8 - 152.4 m): Rhyolitic tuff becoming more crystal-rich.Unit is a crystal vitric tuff with relatively fresh biotite crystals.

500 - 505' (152.4 - 153.9 m): Color changes to medium gray.

510 - 535' (155.4 - 163.1 m): Rhyolitic tuff: Light gray to off-white in color. Quartz phenocrysts suspended in an aphanitic groundmass.Disseminated biotite phenocrysts are also relatively common to 5 percent. Alteration is minimal.

535 - 555' (163.1 - 169.2 m): Vitrophere with abundant obsidian to 50percent.

RHYOLITE 375 - 670' (114.3 - 204.2 m): Rhyolite: Light purple to light-medium gray. Aphanitic, microcrystalline and generally equigranular.Unit contains extensively altered areas, locally osidized to reddish brownalong hairline fractues in chips. Fractures display narrow alterationenvelopes to 0.2 inch. Localized pumice fragments are visible.Described as a crystal vitric tuff??

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555 - 560' (169.2 - 170.7 m): Color change to reddish orange.

560 - 610' (170.7 - 185.9 m): Latite/trachyte: Dusky red to reddish brown. Microcrystalline, vitreous aphanitic matrix, locally microporphyritic witheuhedral feldspar phenocrysts. Less than 10 percent augite andhornblende present.

610 - 620' (185.9 - 189 m): Rhyolitic tuff: Light orange to white in color.Porphyritic with quartz phenocrysts to 0.1 inch suspended in anaphanitic/microcrystalline matrix. Traces of obsidian (to 10 percent)present.Borehole collapsed to 620' (189 m).

TD = 670' (204.2 m)

BLM-30


Figure 3 BLM-30 Westbay Well Completion Diagram

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WELL COMPLETION DIAGRAM

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Location ID: Site ID: NASA-WSTF, Doña Ana County, NM

Page 1 of 2Location ID:

WESTBAY® MONITORING WELL

Diameter and Type Surface Casing:

Diameter Well Casing:

Field Representative(s):

Elevation (Top of Casing):

Comments:

Type of Casing:

Date(s) Well Installed:

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Packer

Casing Explanation: Measurement Port (MP)

MP with Filter Sock

Mechanical Pumping Port (PP)

Magnetic Collar

Water Table

Feet/Meters All depths listed are bgs (unless noted) All depths listed are bgsAnnular/Borehole DescriptionsWell Descriptions

Surface Casing

Slough

Cement

Surface Casing Stick-Up = ~1.88' (0.6 m)Well completed with ~3' x ~3' cement pad, barrier posts,and locking steel well cap surrounding the casing at ground surface

Westbay® Well Stick-Up = 1.5' (0.464 m)

BLM-30

BLM-30

TOSC = Top of Surface Casing AMSL = Above Mean Sea Levelculated value based on piezometric levels at MPs.

8 1/2" 0-390'; 4 1/2" 390-670'

Nominal 5" Steel

1.5" ID; 1.9" OD

P. Egan, M. Jacobs, M. Russell, R. Chavez

1401.97 m AMSL

Depths (meters) for WB components and zones are a cal-

Westbay® MP 38 PVC

5/12/95 - 5/16/95

390' (118.9 m)

No development information available.

518' (157.9 m) borehole (5/15/95)380' (115.8 m); Rhyolite

J. Gower

1401.51 m AMSL169811.21N 463249.77E

NE 1/4 NE 1/4 NW 1/4 Sec. 33, T20S, R3E

No development information available.

670' (204.2 m)475' (144.40 m) and 585' (179.27 m)

470-480' (142.85-145.92 m);and 580-590' (177.75-180.61 m)

Borehole sloughed to 613' (per geophysical logs)

1.5" ID Westbay® MP38 End Cap

1.5" ID Westbay® MP38 Casing

Nominal 5" Steel

605' (184.4 m)

The 475' port is no longer sampled.

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Page 2 of 2Location ID:

Well Descriptions Annular/Borehole DescriptionsAll depths listed are bgsAll depths listed are bgs (unless noted)Feet/Meters

Packer

Cement

Slough

Surface Casing

Water Table

Magnetic Collar

Mechanical Pumping Port (PP)

MP with Filter Sock

Measurement Port (MP)Casing Explanation:

Nominal 5" Steel Surface Casing Depth = 390' (118.9 m)

Depth to Water = 518' (157.9 m)(Borehole; assumedmeasured 5/15/95 just before Westbay® well casinginstallation, as listed on packer inflation forms)

4 1/2" Borehole TD = 670' (204.2 m)

MP Depth = 460' (139.80 m)Packer Depth = 465'-470' (141.32-142.85 m)Magnetic Collar Depth = 474.6' (144.28 m)Sampling MP Depth (with Filter Sock) = 475' (144.40 m)PP Depth = 480' (145.92 m)Packer Depth = 480'-485' (145.92-147.45 m)

MP Depth = 535' (164.20 m)

Packer Depth = 575'-580' (176.22-177.75 m)Magnetic Collar Depth = 584.6' (179.15 m)Sampling MP Depth (with Filter Sock) = 585' (179.27 m)PP Depth = 590' (180.61 m)Packer Depth = 590'-595' (180.61-182.13 m)MP Depth = 595' (182.13 m)Westbay® MP 38 Casing TD = 605' (184.4 m)

BLM-30

Rhyolite Bedrock Depth = 380' (115.8 m)8 1/2" Borehole cemented to 390'(118.9 m)

Top of Slough = 613' (187.0 m) pergeophysics.

This zone is no longer sampled.

Original borehole TD = 670' (204.2 m)

Nominal 5" Steel

1.5" ID Westbay® MP38 Casing

1.5" ID Westbay® MP38 End Cap


Figure 4 WSTF Plume and Well BLM-30 Location Map

(SEE NEXT PAGE)

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BLM-5-527

BLM-8-418

BLM-1-435

BLM-17-493BLM-17-550

PFE-6

PFE-3PFE-3-PZ

MPITS Treatment Building

JER-2

BLM-30

BLM-32

BLM-18-418

BLM-22-570

BLM-9-419 MPE-5

BLM-38MPE-4

BLM-23-431

BLM-41-420BLM-41-670

700-E-458

BLM-14-327

BLM-26-404

MPE-2

BLM-21-400BLM-36

MPE-6BLM-39MPE-7

MPE-3

MPE-1MPE-8MPE-9

MPE-11

MPE-10PFE-5

Location of Well BLM-30!( Multiport!( Conventional Well!( Extraction Well

!( Injection Well#* Piezometer!( Exploration Well

NDMA MCL (1.1 ppt)

TCE MCL (4.9 ppb)

Western BoundryFault ZoneWSTF Boundary ²

December 20171 in = 1,042 ft0 1,250 2,500

Feet


Figure 5 Water FLUTe System Installation Schematic

From FLUTe, LLC (2010)

Documents

Westbay Well - NASA€¦ · Figure 2. The borehole was completed with 1.5-inch (in.) inside diameter (1.9-in. outside diameter) schedule 80 polyvinyl chloride (PVC) Westbay MP38 casing