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TABLE OF CONTENTS
Page No. LIST OF TABLES .......................................................................................................................... ii LIST OF FIGURES ........................................................................................................................ ii LIST OF APPENDICES ................................................................................................................. ii LIST OF ACRONYMS, ABBREVIATIONS, AND SYMBOLS ................................................ iii
1.0 INTRODUCTION..............................................................................................................1
2.0 BACKGROUND ................................................................................................................1 2.1 PAN LYSIMETERS ........................................................................................................... 2 2.2 PIEZOMETERS ................................................................................................................. 2 2.3 TDR SYSTEM .................................................................................................................... 2 2.4 RAINFALL ......................................................................................................................... 3
3.0 INFILTRATION MONITORING RESULTS ................................................................4 3.1 PIEZOMETERS ................................................................................................................. 4 3.2 LYSIMETERS .................................................................................................................... 5 3.3 TDR SYSTEM .................................................................................................................... 5 3.4 CONCLUSIONS ................................................................................................................ 6
4.0 SITE INSPECTION...........................................................................................................6
5.0 REFERENCES ...................................................................................................................7
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LIST OF TABLES Table 1 Summary of Sensor Placement and Initial Water Content Values Table 2 Summary of Rainfall, Piezometer Measurable Water, and Lysimeter Capture
LIST OF FIGURES Figure 1 Final Grading and Instrument Locations Figure 2 Photograph of FSDF Site Looking North-Northeast From South (Uphill) of “H”
Street Figure 3 Photograph Looking North-Northwest Down Gravel Road of the FSDF Site From
Confluence with “H” Street Figure 4 Lysimeter Details Figure 5 Rainfall for July 2010 Through June 2011 Figure 6 Pan Lysimeter Water Accumulation July 2010 Through June 2011 Figure 7A Data for TDR Cluster 1, December 2000 to July 2006 Figure 7B Data for TDR Cluster 1, May 2006 to July 2011 Figure 7C Data for TDR Cluster 2, December 2000 to July 2006 Figure 7D Data for TDR Cluster 2, May 2006 to July 2011 Figure 7E Data for TDR Cluster 3, December 2000 to July 2006 Figure 7F Data for TDR Cluster 3, May 2006 to July 2011
LIST OF APPENDICES Appendix 1 Piezometer Well Logs
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LIST OF ACRONYMS, ABBREVIATIONS, AND SYMBOLS AIMR Annual Operation and Maintenance and Infiltration Monitoring Report CDFG California Department of Fish and Game DTSC California Department of Toxic Substance Control EPA U.S. Environmental Protection Agency ESI Environmental Sensors, Inc. FSDF Former Sodium Disposal Facility ft foot or feet HDPE High Density Polyethylene IFMP Infiltration Monitoring Workplan IM Interim Measures IMWP Interim Measures Workplan IT IT Corporation ml milliliters msl Mean Sea Level pcf Pounds per Cubic Foot PZ Piezometer SDR Standard Dimensional Ratio Shaw Shaw Environmental, Inc. SSFL Santa Susana Field Laboratory TDR Time Domain Reflectometry
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1.0 INTRODUCTION Implementation of the Interim Measures Workplan for Soil Cleanup (IMWP) (IT Corporation [IT], 1999) for the Former Sodium Disposal Facility (FSDF) was completed in December of 2000, with only minor grading adjustments being made in the summer of 2001 to provide better erosion control. The Interim Measures (IM) included the excavation and offhaul of approximately 14,000 tons of soil from the FSDF area and downslope channels, the cleaning and mapping of the exposed bedrock surface, the backfilling of the excavation with soil from an on-site borrow source, and the revegetation of the area. Excavation was completed at the end of August 2000, rock surface cleaning occurred in September. Backfilling occurred in October and November. In early December 2000, the site was revegetated by hydroseeding. Oak trees were also planted per the requirements of a California Department of Fish and Game (CDFG), Stream Bed Alteration Agreement for the project. A program to monitor infiltration through the fill of the FSDF area excavations was developed in early 2000, and is described in the Infiltration Monitoring Workplan (IFMP) (IT, 2000). The IFMP calls for the monitoring of infiltration, the occurrence of free water at the contact of the rock and fill, and the moisture content in the FSDF fill using pan lysimeters, piezometers, and Time Domain Reflectometry (TDR) probes, respectively. In Section 2.0 of this report, the installation of these monitoring elements is briefly described. The monitoring results for the lysimeters, piezometers, and TDR probes for the period December 2000 to July 2001 were presented in a first annual monitoring report (IT, 2001). The monitoring results for the period July 2001 through June 2002 were reported in the 2002 Annual Operation and Maintenance and Infiltration Monitoring Report (2002 AIMR) (Shaw Environmental and Infrastructure, Inc., 2002). Similarly, the monitoring results for the periods July 2002 through June 2003, July 2003 through June 2004, July 2004 through June 2005, July 2005 through June 2006, July 2006 through June 2007, July 2007 through June 2008, July 2008 through June 2009, and July 2009 through June 2010 were reported in the 2003, 2004, 2005, 2006, 2007, 2008, 2009, and 2010 AIMRs, respectively. In Section 3.0 of this report, the monitoring results for the lysimeters, piezometers, and TDR probes are presented for the period July 2010 through June 2011. Section 4.3.4 of the IMWP describes operation and maintenance of the fill and revegetation. This section calls for the inspection of the fill following significant rain events, and inspection and repair of any erosional features annually for the period of the Interim Measures. Section 4.0 of this report describes these activities for the period July 2010 through June 2011. 2.0 BACKGROUND The primary area of remediation at the FSDF was the area of the former Lower Pond, Upper Pond and Western Area. This area is bordered by “H” Street to the south, a gravel access road to the east and a rock ridge to the west. As shown by the topographic lines on Figure 1, the FSDF area is graded to sheet flow to the north-northeast into Channel B. Drainage from the area of the watershed upslope of the FSDF is captured and routed around the primary remediation area by the ditch and culvert shown in Figure 1. Figures 2 and 3 show the site as of August 2011. Figure 2 is a view of the FSDF site looking north-northeast and downslope from uphill (i.e., south) of the site. A utility shed located on “H” Street is visible in the middle of the photograph. Figure 3 is a view of the FSDF area looking north-northwest down the gravel road of the site from its confluence with “H” Street. The direction of view for these photographs is noted on Figure 1. Site vegetation was mowed by a contractor for the U.S. Environmental Protection Agency in about January 2011, and is seen in the photos to be dry. The oak trees planted in 2000 in the filled area of the FSDF site are now generally between 10 and 15 feet tall.
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2.1 PAN LYSIMETERS Two pan lysimeters were installed in 2000, one in the area of the former Lower Pond (Lysimeter 1), and the other south of the first (Lysimeter 2) (Figure 1). Pan lysimeters measure the downward infiltration of water through the overlying soil. The lysimeter assembly is illustrated in Figure 4. Each lysimeter consists of a 10 ft by 10 ft collection pan fabricated of high density polyethylene (HDPE) membrane. The membrane is covered with a drainage layer consisting of a geosynthetic drainage net and fabric composite (Fabrinet™), 4 inches minimum of 3/8-inch gravel and a 4 oz filter fabric. Any infiltration intercepted by this collection pan is directed into the storage pipe and reservoir. The lysimeter is checked for any collected water though a 4-inch riser pipe which is secured at the surface in a locking well cover. The storage pipe, reservoir, and riser are fabricated of welded SDR 11 HDPE pipe and fittings. The lysimeters were generally placed a minimum of a foot above the rock contact. The total soil cover above Lysimeter 1 (i.e., the depth of the HDPE pan from the surface) is approximately 7 feet. At Lysimeter 2, the total depth of soil cover is about 11 ft. 2.2 PIEZOMETERS Four piezometers were installed to monitor for the presence of free water at the contact of the fill and the sandstone bedrock. The placement and configuration of the piezometers was discussed and agreed upon by representatives of the California Department of Toxic Substance Control (DTSC) and Boeing when the FSDF area excavations had been completed and the rock surface had been cleaned, but prior to the backfilling of these excavations. For all the piezometers, the boreholes were advanced to 4 to 6 inches into the rock contact, and the casings were set on the bottom of the boreholes. Holes and filter fabric were provided in the bottom of the casing caps to allow for the detection of even a thin saturated layer above rock. The boring log of each piezometer is included in Appendix 1. The specifics of the piezometer installations are as follows: • Piezometer 1 (PZ Test 1) is located at the north end of the former Lower Pond area, and monitors a
deep northeast trending channel in the rock surface. A gravel pack approximately 50 feet long by 4 feet wide was laid in the channel, with the piezometer being drilled near the north end (i.e., low end) of the gravel pack;
• Piezometer 2 (PZ Test 2) is located near the east side of the remedial excavation. A gravel pack wrapped in filter fabric was again placed in a northeast trending channel. This gravel pack is approximately 30 feet long and 6 feet wide. Once again, the casing was drilled into the north (i.e., lower) end of this gravel pack; and
• Piezometers 3 and 4 (PZ Test 3 and 4) are located near the south side of the fill of the Ponds and Western Area excavation.
2.3 TDR SYSTEM The TDR system consists of three clusters of TDR probes hooked through conduit to a solar-powered data scanner system mounted aboveground in a waterproof panel. The TDR probes measure the volumetric moisture content of the soil through the vertical profile of the fill at the three cluster locations. The positions of the TDR clusters and the system scanner are shown in Figure 1. Historically, data has been downloaded from the system either by using the cellular phone modem of the unit, or by directly connecting a laptop computer in the field.
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Each TDR cluster consists of three probes each with an effective length of two feet. Each probe has four sense points spaced at 6 inch (15 cm) intervals along the probe. Thus, a complete scan of the three cluster produces 36 soil moisture data points. The system has operated since installation with a scan interval of one hour. The system reports the monitoring results as volumetric water content (i.e., volume of water/volume of soil) and utilizes a data interpretation algorithm programmed by the manufacturer given information on the anticipated fill properties. Table 1 provides the depth of the effective length of the nine total probes installed in the three clusters. During installation, gravimetric laboratory soil moisture content samples were obtained. These are compared in Table 1 to the average value for the four sense points of each probe for the first full day of scanner data obtained. The conversion of volumetric to weight water content is equal to the unit weight of water divided by the dry unit weight of the soil times 100%. The measured dry density of the FSDF fill soil averages about 108.6 pounds per cubic foot (pcf), or 92% relative compaction. Thus the conversion is about 57.5. The IMWP prescribes a data collection interval of 4 hours for the TDR probes. The TDR unit was set to collect data hourly during the July 2010 through June 2011 monitoring period. The data was then downloaded for processing. Environmental Sensors, Inc. (ESI) of Victoria, British Columbia, Canada, the manufacturer and installer of the TDR system was retained by Shaw Environmental, Inc. (Shaw) to reduce this data and to plot it along with the results from the prior monitoring periods (i.e., from startup in late 2000 through June 2010). The TDR data were reduced by ESI as follows: • For each day of monitoring, all hourly sensor readings for a probe were averaged to yield a single
average volumetric water content value. • The initial volumetric water content of a probe was calculated by performing this average on the first
full day of data collection; and • The relative (weight) water content change for a probe was then calculated by subtracting the average
initial volumetric water content from the daily average, and multiplying by 57.5. ESI examines the probe data for errant readings indicative of probe failure, instability, or of intermittent connection problems. Easily identifiable problem readings are filtered from the data prior to calculating average daily probe values. The frequency of these error readings was noted by ESI to have increased over the prior monitoring period, with loose cable connections due to temperature cycling over the years postulated to be the cause. A service check of the TDR system by an ESI representative to address such issues is scheduled for this fall as discussed in Section 3.3. The filtering of data from Probe 5 of TDR Cluster 2 has historically been required. For the purpose of consistency in data presentation over the entire operating history, only the two middle sensors of Probe 5 are used in the evaluation of data from this probe. 2.4 RAINFALL Rainfall data for the period July 2010through June 2011 are tabulated approximately weekly in parallel with the piezometer and lysimeter monitoring events. These weekly totals are provided in Table 2, and are plotted in Figure 5. This data is from an automated weather station located within Area 4. From July 2010 through June 2011, manual monitoring of the lysimeters and piezometers generally occurred weekly on Thursday or Friday. There were, however, some variations in this schedule resulting
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in weeks without monitoring events. The SSFL facility is closed for the week between Christmas and New Years, and no readings were thus taken that week. The weekly rain totals in Table 2 and Figure 5 are the accumulated precipitation since the last monitoring event (i.e., the day after the last monitoring event through the date of the current monitoring event). This monitoring year was characterized by numerous smaller rain events. As shown in Figure 5, the first significant rainfall event occurred in early October. Monitoring weeks with rainfall above one inch included those ending on December 21 (5.60 inches), December 31 (2.26 inches), February 18 (2.01 inches), February 25 (1.61 inches), and March 25 (3.36 inches). The contiguous periods of heaviest rainfall were December 17 to 22 (7.22 inches) and March 18 to March 25 (3.44 inches). Total rainfall for the July 2010 through June 2011 monitoring period was 20.91 inches. By comparison, total rainfall for the period July 2009 through June 2010 at the SSFL was about 19.48 inches. The average rainfall for Chatsworth, the city immediately southeast of the SSFL, is 16.13 inches for the period 1971 through 2000. The total rainfall for the eight monitoring periods prior to June 2009 (i.e., July 2001 through June 2002, July 2002 through June 2003, July 2003 through June 2004, July 2004 through June 2005, July 2005 through June 2006, July 2006 through June 2007, July 2007 through June 2008, and July 2008 through June 2009) were about 5.4, 25.2, 14.8, 45.2, 17.9, 6.2, 17.9, and 11.36 inches, respectively. 3.0 INFILTRATION MONITORING RESULTS 3.1 PIEZOMETERS The collection of the piezometer and lysimeter data is performed and supervised by Boeing personnel. Though only monthly monitoring is prescribed by the IFMP, the piezometers and lysimeters were monitored approximately weekly during the current reporting period. The piezometer and lysimeter monitoring results are supplied to Shaw by Boeing, and this data are summarized in Table 2 along with the weekly rainfall data. The presence of water in the piezometers and lysimeters was monitored with an electric well tape (Solinst Model Mini 101). This instrument has its sensing element at the tip, and thus can detect very small accumulations of moisture in the bottom of a piezometer casing or lysimeter storage reservoir. If a piezometer did not contain measurable water, “no” measurable thickness is shown in Table 2. If measureable water is detected, “yes” is shown in Table 2. Where water was detected in a lysimeter and removed during a monitoring event, the amount of water removed is recorded. For the July 2010 through June 2011 monitoring period, no measurable water was observed in piezometers PZ Test 2, 3, or 4. Measureable water was only detected in PZ Test 1 in the weekly monitoring events of May 5 through June 9. The last period during which measurable water was observed in PZ Test 1 was in May and June of 2006. Shallow soil/bedrock well RS-54 lies 80 feet south-southwest and upslope of PZ Test 1 (Figure 1). The measured groundwater elevation in RS-54 rose over the current monitoring period to a level in May 2011 similar to that observed in May 2006. Consequently, the detection of measurable water at PZ Test 1 in May and early June of 2011 is taken to be a reflection of the rise in the groundwater level to at or above the rock contact in the deep channel monitored by PZ Test 1.
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3.2 LYSIMETERS As described at the beginning of Section 3.1, the storage reservoirs of the lysimeters were generally checked weekly for collected water. If standing water was present, it was removed and measured. The lysimeter monitoring results for the current reporting period are summarized in Table 2, and plotted in Figure 6. The volumes of water accumulated by Lysimeter 1 (L-1) and Lysimeter 2 (L-2) were minimal (3 ml or less). As these volumes are atypically low compared to earlier monitoring years, the lysimeters will be examined to the degree possible and the monitoring procedures rechecked during the planned field work to upgrade and service the TDR system this fall. 3.3 TDR SYSTEM The TDR data for the current monitoring period was downloaded on August 3, 2011 by Shaw personnel. The data was then provided to ESI for reduction and plotting. Summary plots of the data for TDR Cluster 1, 2, and 3 are shown in Figures 7A and B, 7C and D, and 7E and F, respectively. For each TDR sensor cluster, the first of the two figures shows the data from the start of TDR monitoring in December 2000 through June 2006. The second figure shows the data from April 2006 through the end of June 2011. In these figures, the daily average value of each probe are presented relative to the initial average value, and have been converted to weight water content change from volumetric water content change. During the July 2006 through June 2007 monitoring period, technical difficulties had been encountered with the TDR data collection unit which began with the very hot weather of mid-July 2006. Usable data from the unit was not obtained during portions of that monitoring period. The TDR unit was field serviced by an ESI representative in August of 2007, with the battery being replaced, the solar panel being cleaned, and the probe connections at the scanner unit being checked. During the July 2007 through June 2008 monitoring period, some data interruptions were again experienced; however, no significant data interruptions have been experienced since early July of 2008. During the current monitoring period, some minor data interruptions were experienced due to low battery levels, particularly at night during winter months, as the system battery is charged using a solar panel. This condition will be addressed during a planned ESI service call this fall. The TDR data for the current monitoring period were processed as described Section 2.3, and are presented in Figures 7B, D and F for TDR Clusters 1, 2, and 3, respectively. Relatively rapid response of the shallow probes to successive rain events is typical and seen at all the probe clusters. The response of deeper probes would be expected to lag increasing with depth. TDR Cluster 1 lies closest to L-1. During the current monitoring period, the deep probe results at this location shows a slight rise through the fall, and early winter, and is relatively steady thereafter. The shallow and intermediate depth probes show response to the periods of more significant rain in later December, mid-February and mid-March. Further review of the Cluster 1 data for the previous two monitoring periods was performed due to the arrival of moisture at the deep probe coincident with heavy rain periods in February 2009 and January 2010. These observations suggest the potential presence of preferential flow paths to the probe location at the time of these moisture arrivals, but no such pattern was seen in the deep probe data for the current monitoring period. The TDR Cluster 1 location is to be augmented with additional probes this fall as discussed later in this section. TDR Cluster 2 lies closest to L-2. The intermediate depth probe data for this cluster show a general decline from mid-July 2010 through about March 2011, after which the data trends up till near the end of the monitoring period. The general trend of the deep probe data shows a slight decline during the current monitoring period; however, in March 2010, the amount of usable data obtained from this probe began to
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decline. The cable connections to this probe are to be checked during the ESI service call planned for this fall. The probes of TDR Cluster 3 are shallower than at the other two clusters. During the current monitoring period, the shallow and intermediate depth probes show response to the periods of more significant rain in later December, mid-February and mid-March. However, the deep probe shows little response till later in February, and then again in March. Consistent with the recommendations of the 2010 AIMR, the TDR unit is being serviced, and an additional set of probes will be installed adjacent to Cluster 1 this fall. Following the download of the TDR data on August 3, the ESI Moisture Point™ unit was removed from the field enclosure, and returned to ESI for servicing and recalibration. Three additional probes have been fabricated by ESI. The new probes will be installed adjacent to Cluster 1 by Shaw. An ESI field representative will then service the TDR system including reinstalling the Moisture Point™ unit, integrating in the new probes, changing the system battery, servicing the solar panel, and checking the probe cable connections. The ESI representative will then confirm that probe scanning and datalogging has successfully recommenced. 3.4 CONCLUSIONS Only minimal volumes of water were collected in Lysimeter No. 1 and 2. As these volumes are atypically low compared to earlier monitoring years, the lysimeters will be examined to the degree possible and the monitoring procedures rechecked during the planned field work to upgrade and service the TDR system this fall. No measurable water was observed in piezometers PZ Test 2, 3, and 4 during the current monitoring period. Measurable water was only detected in PZ Test 1 in the May and early June. The detection of measurable water at PZ Test 1 in May and early June of 2011 is taken to be a reflection of the rise of the shallow groundwater level to at or above the rock contact in the deep channel monitored by PZ Test 1. The average daily deep probe data for TDR Cluster 1 showed a slight rise through the fall, and early winter, and was relatively steady thereafter. The deep probe of TDR Cluster 3, which is at a depth of 3.8 to 5.8 feet, did not show a significant moisture increase till February. Servicing of the TDR system is proceeding, and an additional probe cluster will be installed adjacent to Cluster 1 this fall. 4.0 SITE INSPECTION Boeing personnel, or their designated contractor, inspected the FSDF site prior to and following rain events (i.e., generally weekly) during this reporting period. As part of these inspections, repair as needed or maintenance to erosion control measures were made. A Shaw civil engineer examined the FSDF project site on August 3, 2011. The site monitoring data for the current monitoring period were supplied by Boeing during that facility visit. The vegetation at the FSDF site, including in Channel B and south of “H” street, had been mowed by a contractor to EPA in about January 2011. As may be seen in Figures 2 and 3, the vegetation had regrown to a height of about two to three feet. The thirteen Oak trees in the backfilled area also appeared well established, and are now generally 10 to 15 feet tall. Significant animal burrowing was evident across the FSDF fill area with the ground surface frequently being soft and hummocky. The burrowing was less prominent in corridors of the site leading to wells and
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piezometers where the ground is trafficked. Desiccation cracks generally ½ inch or less in width were also observed in the soil surface of the FSDF fill area. A significant drilling and sampling event by EPA’s contractor occurred at the FSDF in May and June 2011. This sampling event left vehicles ruts in numerous locations across the fill area. These surface disturbances not withstanding, no significant erosion features (e.g., deep gullying) were observed in the FSDF fill area. At the time of the site walk, the gravel road along the east side of the site and down Upper Channel B was in good repair. At the bend in the gravel road just north of PZ Test 1, fill was previously placed and graded to create a flat area for staging equipment used in the site stormwater management program. The riprap lined channel across the south end of Channel B is still evident though largely filled across the width of the gravel road and much of its length to the east. A substantial fill mound abutting the fill area and placed across the gravel road and much of Channel B over to the eastern drainage ditch remains in place. The improvements to the stormwater management facilities at the north end of Upper Channel B observed last year remain in place. These improvements included two geomembrane covered check dams with underflow piping near the north end of Upper Channel B. This outfall work, done pursuant to elements of the site stormwater program, is outside the scope of this report. Implementation of a vector control program at the FSDF site to reduce animal burrowing is planned by Boeing. A surface compaction test will be performed this fall by Shaw to gauge the effectiveness of this approach in closing shallow animal burrows. The test will be performed using a smooth drum vibratory roller to limit vegetation damage. No compaction will be done in close proximity to any of the Oak trees. Some continued sloughing of soil from animal burrowing along and in the drainage ditch along the east side of the site was observed. Where this has occurred, the ditch should be reestablished prior to the onset of fall rains. The routine inspections of the FSDF site by Boeing personnel, or Boeing contractors, together with the Shaw Environmental site visit fulfills the requirements for inspection of Section 4.3.4 of the IMWP. 5.0 REFERENCES IT Corporation, 1999. Draft Final Interim Measures Workplan for Soil Cleanup, Former Sodium Disposal Facility, Santa Susana Field Laboratory. July 9. IT Corporation, 2000. Infiltration Monitoring Workplan, Former Sodium Disposal Facility, Santa Susana Field Laboratory. April 14. IT Corporation, 2001. Annual Operation and Maintenance and Infiltration Monitoring Report, December 2000 Through July 2001. August 31. Shaw Environmental and Infrastructure, Inc., 2002. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2001 Through June 2002. August 31. Shaw Environmental, Inc., 2003. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2002 Through June 2003. August 31. Shaw Environmental, Inc., 2004. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2003 Through June 2004. August 31.
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Shaw Environmental, Inc., 2005. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2004 Through June 2005. September 30. Shaw Environmental, Inc., 2006. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2005 Through June 2006. August 31. Shaw Environmental, Inc., 2007. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2006 Through June 2007. September 24. Shaw Environmental, Inc., 2008. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2007 Through June 2008. September 29. Shaw Environmental, Inc., 2009. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2008 Through June 2009. October 9. Shaw Environmental, Inc., 2010. Annual Operation and Maintenance and Infiltration Monitoring Report, July 2009 Through June 2010. August 31.
TABLES
Table 2: Summary of Rainfall, Piezometer Measurable Water, and Lysimeter Capture
Week Ending Date
Rainfall (In/Wk)
Cumulative Rain
(In/Wk) PZ Test 1 PZ Test 2 PZ Test 3 PZ Test 4
Current Period L-1
(ml)
Cumulative Water L-1
(ml)
Current Period L-2
(ml)
Cumulative Water L-2
(ml)07/01/10 0.00 0.00 No No No No 0.0 0.0 0.0 0.007/09/10 0.00 0.00 No No No No 0.0 0.0 0.0 0.007/16/10 0.01 0.01 No No No No 0.0 0.0 0.0 0.007/23/10 0.00 0.01 No No No No 0.0 0.0 0.0 0.007/28/10 0.00 0.01 No No No No 0.0 0.0 0.0 0.008/05/10 0.00 0.01 No No No No 0.0 0.0 0.0 0.008/16/10 0.00 0.01 No No No No 0.4 0.4 0.0 0.008/20/10 0.00 0.01 No No No No 0.4 0.8 0.0 0.008/26/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.009/02/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.009/09/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.009/16/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.009/24/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.010/01/10 0.00 0.01 No No No No 0.0 0.8 0.0 0.010/08/10 0.98 0.99 No No No No 0.0 0.8 0.0 0.010/19/10 0.54 1.53 No No No No 0.0 0.8 0.0 0.010/28/10 0.15 1.68 No No No No 0.0 0.8 0.0 0.011/04/10 0.43 2.11 No No No No 0.0 0.8 0.0 0.011/09/10 0.16 2.27 No No No No 0.0 0.8 0.0 0.011/19/10 0.28 2.55 No No No No 0.0 0.8 0.0 0.011/24/10 0.70 3.25 No No No No 0.0 0.8 0.0 0.012/03/10 0.05 3.30 No No No No 0.0 0.8 0.0 0.012/09/10 0.41 3.71 No No No No 0.4 1.2 0.0 0.012/17/10 0.38 4.09 No No No No 0.0 1.2 0.0 0.012/21/10 5.60 9.69 No No No No 0.6 1.8 0.0 0.012/31/10 2.26 11.95 NRb NRb NRb NRb NRb 1.8 NRb 0.001/07/11 0.38 12.33 No No No No 0.6 2.4 0.4 0.401/21/11 0.00 12.33 No No No No 0.0 2.4 0.0 0.401/28/11 0.00 12.33 No No No No 0.0 2.4 0.0 0.402/04/11 0.17 12.50 No No No No 0.0 2.4 0.0 0.402/11/11 0.00 12.50 No No No No 0.0 2.4 0.0 0.402/18/11 2.01 14.51 No No No No 0.0 2.4 0.0 0.4
(ml water)Piezometers Lysimeters
Measureable Water
Page 1 of 2
Table 2: Summary of Rainfall, Piezometer Measurable Water, and Lysimeter Capture
02/25/11 1.61 16.12 No No No No 0.0 2.4 0.0 0.403/04/11 0.34 16.46 No No No No 0.0 2.4 0.0 0.403/11/11 0.12 16.58 No No No No 0.0 2.4 0.0 0.403/18/11 0.08 16.66 No No No No 0.0 2.4 0.0 0.403/25/11 3.36 20.02 No No No No 0.6 3.0 0.0 0.404/01/11 0.18 20.20 No No No No 0.0 3.0 0.0 0.404/07/11 0.00 20.20 No No No No 0.0 3.0 0.0 0.404/15/11 0.00 20.20 No No No No 0.0 3.0 0.0 0.404/22/11 0.00 20.20 No No No No 0.0 3.0 0.0 0.405/05/11 0.02 20.22 Yesa No No No 0.0 3.0 0.0 0.405/20/11 0.68 20.90 Yesa No No No 0.0 3.0 0.0 0.405/27/11 0.00 20.90 Yesa No No No 0.0 3.0 0.0 0.406/06/11 0.01 20.91 Yesa No No No 0.0 3.0 0.0 0.406/09/11 0.00 20.91 Yesa No No No 0.0 3.0 0.0 0.406/21/11 0.00 20.91 No No No No 0.0 3.0 0.0 0.407/01/11 0.00 20.91 No No No No 0.0 3.0 0.0 0.4
Notes a
b Facility closed between Christmas and New Years. Automated rainfall data available, but no manual monitoring of lysimeter and piezometers performed that week. NR indicates no lysimeter or piezometer reading data available.
P-1 noted as damp or wet, with <1 ml of water removed by monitoring technician. No thickness of water or depth to water measurement provided.
Page 2 of 2
FIGURES
Prepared by BMC 28/08/2007 E.S.I.Environmental Sensors Inc.
FIGURE 7A: Data for TDR Cluster 1, Dec 2000 to Jul 2006
-15
-13
-11
-9
-7
-5
-3
-1
1
3
5
7
9
11
13
15
8-D
ec-0
07-J
an-0
16-F
eb-0
19-M
ar-
01
8-A
pr-
01
9-M
ay-0
18-J
un-0
19-J
ul-
01
8-A
ug-0
18-S
ep-0
18-O
ct-
01
7-N
ov-0
18-D
ec-0
17-J
an-0
27-F
eb-0
29-M
ar-
02
9-A
pr-
02
9-M
ay-0
29-J
un-0
29-J
ul-
02
9-A
ug-0
28-S
ep-0
28-O
ct-
02
8-N
ov-0
28-D
ec-0
28-J
an-0
37-F
eb-0
310-M
ar-
03
9-A
pr-
03
10-M
ay-0
39-J
un-0
39-J
ul-
03
9-A
ug-0
38-S
ep-0
39-O
ct-
03
8-N
ov-0
39-D
ec-0
38-J
an-0
48-F
eb-0
49-M
ar-
04
9-A
pr-
04
9-M
ay-0
48-J
un-0
49-J
ul-
04
8-A
ug-0
48-S
ep-0
48-O
ct-
04
8-N
ov-0
48-D
ec-0
48-J
an-0
57-F
eb-0
59-M
ar-
05
9-A
pr-
05
9-M
ay-0
59-J
un-0
59-J
ul-
05
9-A
ug-0
58-S
ep-0
59-O
ct-
05
8-N
ov-0
59-D
ec-0
58-J
an-0
67-F
eb-0
610-M
ar-
06
9-A
pr-
06
10-M
ay-0
69-J
un-0
6
Date
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.7 (1' to 3') Probe No.8 (4' to 6') Probe No.9 (7' to 9')
Spri
nklin
gR
un o
ff test
Fir
e
Prepared by BMC 19/08/2011 E.S.I.Environmental Sensors Inc.
FIGURE 7B: Data for TDR Cluster 1, May 2006 to July 2011
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2
4
6
8
10
12
14
16
18
20
01-M
ay-0
631-M
ay-0
630-J
un-0
631-J
ul-
06
30-A
ug-0
630-S
ep-0
630-O
ct-
06
30-N
ov-0
630-D
ec-0
630-J
an-0
701-M
ar-
07
31-M
ar-
07
01-M
ay-0
731-M
ay-0
701-J
ul-
07
31-J
ul-
07
31-A
ug-0
730-S
ep-0
731-O
ct-
07
30-N
ov-0
731-D
ec-0
730-J
an-0
829-F
eb-0
831-M
ar-
08
30-A
pr-
08
31-M
ay-0
830-J
un-0
831-J
ul-
08
30-A
ug-0
830-S
ep-0
830-O
ct-
08
29-N
ov-0
830-D
ec-0
829-J
an-0
901-M
ar-
09
31-M
ar-
09
01-M
ay-0
931-M
ay-0
901-J
ul-
09
31-J
ul-
09
31-A
ug-0
930-S
ep-0
930-O
ct-
09
30-N
ov-0
930-D
ec-0
930-J
an-1
001-M
ar-
10
01-A
pr-
10
01-M
ay-1
001-J
un-1
001-J
ul-
10
31-J
ul-
10
31-A
ug-1
030-S
ep-1
031-O
ct-
10
30-N
ov-1
031-D
ec-1
030-J
an-1
102-M
ar-
11
01-A
pr-
11
02-M
ay-1
101-J
un-1
101-J
ul-
11
Date
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.7 (1' to 3') Probe No.8 (4' to 6') Probe No.9 (7' to 9')
Prepared by BMC 28/08/2007 E.S.I.Environmental Sensors Inc.
FIGURE 7C: Data for TDR Cluster 2, Dec 2000 to Jul 2006
-15
-13
-11
-9
-7
-5
-3
-1
1
3
5
7
9
11
13
158/D
ec/0
07/J
an/0
16/F
eb/0
19/M
ar/
01
8/A
pr/
01
9/M
ay/0
18/J
un/0
19/J
ul/01
8/A
ug/0
18/S
ep/0
18/O
ct/01
7/N
ov/0
18/D
ec/0
17/J
an/0
27/F
eb/0
29/M
ar/
02
9/A
pr/
02
9/M
ay/0
29/J
un/0
29/J
ul/02
9/A
ug/0
28/S
ep/0
28/O
ct/02
8/N
ov/0
28/D
ec/0
28/J
an/0
37/F
eb/0
310/M
ar/
03
9/A
pr/
03
10/M
ay/0
39/J
un/0
39/J
ul/03
9/A
ug/0
38/S
ep/0
39/O
ct/03
8/N
ov/0
39/D
ec/0
38/J
an/0
48/F
eb/0
49/M
ar/
04
9/A
pr/
04
9/M
ay/0
48/J
un/0
49/J
ul/04
8/A
ug/0
48/S
ep/0
48/O
ct/04
8/N
ov/0
48/D
ec/0
48/J
an/0
57/F
eb/0
59/M
ar/
05
9/A
pr/
05
9/M
ay/0
59/J
un/0
59/J
ul/05
9/A
ug/0
58/S
ep/0
59/O
ct/05
8/N
ov/0
59/D
ec/0
58/J
an/0
67/F
eb/0
610/M
ar/
06
9/A
pr/
06
10/M
ay/0
69/J
un/0
6
DATE
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.4 (1' to 3') Probe No.5 (4.5' to 6.5') Probe No.6 (8' to 10')
Sprinklin
gR
un o
ff t
est
Fire
Prepared by BMC 17/08/2011 E.S.I.Environmental Sensors Inc.
FIGURE 7D: Data for TDR Cluster 2, May 2006 to July 2011
-15
-13
-11
-9
-7
-5
-3
-1
1
3
5
7
9
11
13
151/M
ay/0
631/M
ay/0
630/J
un/0
631/J
ul/06
30/A
ug/0
630/S
ep/0
630/O
ct/06
30/N
ov/0
630/D
ec/0
630/J
an/0
71/M
ar/
07
31/M
ar/
07
1/M
ay/0
731/M
ay/0
71/J
ul/07
31/J
ul/07
31/A
ug/0
730/S
ep/0
731/O
ct/07
30/N
ov/0
731/D
ec/0
730/J
an/0
829/F
eb/0
831/M
ar/
08
30/A
pr/
08
31/M
ay/0
830/J
un/0
831/J
ul/08
30/A
ug/0
830/S
ep/0
830/O
ct/08
29/N
ov/0
830/D
ec/0
829/J
an/0
91/M
ar/
09
31/M
ar/
09
1/M
ay/0
931/M
ay/0
91/J
ul/09
31/J
ul/09
31/A
ug/0
930/S
ep/0
930/O
ct/09
30/N
ov/0
930/D
ec/0
930/J
an/1
01/M
ar/
10
1/A
pr/
10
1/M
ay/1
01/J
un/1
01/J
ul/10
31/J
ul/10
31/A
ug/1
030/S
ep/1
031/O
ct/10
30/N
ov/1
031/D
ec/1
030/J
an/1
12/M
ar/
11
1/A
pr/
11
2/M
ay/1
11/J
un/1
11/J
ul/11
DATE
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.4 (1' to 3') Probe No.5 (4.5' to 6.5') Probe No.6 (8' to 10')
Prepared by BMC 28/08/2007 E.S.I.Environmental Sensors Inc.
FIGURE 7E: Data for TDR Cluster 3, Dec 2000 to Jul 2006
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
-1.0
1.0
3.0
5.0
7.0
9.0
11.0
13.0
15.0
8/D
ec/0
07/J
an/0
16/F
eb/0
19/M
ar/
01
8/A
pr/
01
9/M
ay/0
18/J
un/0
19/J
ul/01
8/A
ug/0
18/S
ep/0
18/O
ct/01
7/N
ov/0
18/D
ec/0
17/J
an/0
27/F
eb/0
29/M
ar/
02
9/A
pr/
02
9/M
ay/0
29/J
un/0
29/J
ul/02
9/A
ug/0
28/S
ep/0
28/O
ct/02
8/N
ov/0
28/D
ec/0
28/J
an/0
37/F
eb/0
310/M
ar/
03
9/A
pr/
03
10/M
ay/0
39/J
un/0
39/J
ul/03
9/A
ug/0
38/S
ep/0
39/O
ct/03
8/N
ov/0
39/D
ec/0
38/J
an/0
48/F
eb/0
49/M
ar/
04
9/A
pr/
04
9/M
ay/0
48/J
un/0
49/J
ul/04
8/A
ug/0
48/S
ep/0
48/O
ct/04
8/N
ov/0
48/D
ec/0
48/J
an/0
57/F
eb/0
59/M
ar/
05
9/A
pr/
05
9/M
ay/0
59/J
un/0
59/J
ul/05
9/A
ug/0
58/S
ep/0
59/O
ct/05
8/N
ov/0
59/D
ec/0
58/J
an/0
67/F
eb/0
610/M
ar/
06
9/A
pr/
06
10/M
ay/0
69/J
un/0
6
DATE
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.1 (0.5' to 2.5') Probe No.2 (2.5' to 4.5') Probe No.3 (3.8' to 5.8')
Sprinklin
gR
un o
ff t
est
Fire
Prepared by BMC 17/08/2011 E.S.I.Environmental Sensors Inc.
FIGURE 7F: Data for TDR Cluster 3, May 2006 to July 2011
-17.0
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
-1.0
1.0
3.0
5.0
7.0
9.0
11.0
13.0
15.0
17.0
1/M
ay/0
631/M
ay/0
630/J
un/0
631/J
ul/06
30/A
ug/0
630/S
ep/0
630/O
ct/06
30/N
ov/0
630/D
ec/0
630/J
an/0
71/M
ar/
07
31/M
ar/
07
1/M
ay/0
731/M
ay/0
71/J
ul/07
31/J
ul/07
31/A
ug/0
730/S
ep/0
731/O
ct/07
30/N
ov/0
731/D
ec/0
730/J
an/0
829/F
eb/0
831/M
ar/
08
30/A
pr/
08
31/M
ay/0
830/J
un/0
831/J
ul/08
30/A
ug/0
830/S
ep/0
830/O
ct/08
29/N
ov/0
830/D
ec/0
829/J
an/0
91/M
ar/
09
31/M
ar/
09
1/M
ay/0
931/M
ay/0
91/J
ul/09
31/J
ul/09
31/A
ug/0
930/S
ep/0
930/O
ct/09
30/N
ov/0
930/D
ec/0
930/J
an/1
01/M
ar/
10
1/A
pr/
10
1/M
ay/1
01/J
un/1
01/J
ul/10
31/J
ul/10
31/A
ug/1
030/S
ep/1
031/O
ct/10
30/N
ov/1
031/D
ec/1
030/J
an/1
12/M
ar/
11
1/A
pr/
11
2/M
ay/1
11/J
un/1
11/J
ul/11
DATE
RE
LA
TIV
E W
AT
ER
CO
NT
EN
T C
HA
NG
E (
%)
Probe No.1 (0.5' to 2.5') Probe No.2 (2.5' to 4.5') Probe No.3 (3.8' to 5.8')
APPENDIX 1
PIEZOMETER WELL LOGS [From IT (2001)]
