1.O BACKGROUND

2.0 GROUNDWATER AND SURFACE WATER MONITORING

The monitoring work described in this report was performed on November 12 and December 3, 2002 and January 10, 2003. This three month time period constitutes the fourth reporting quarter for Lemon Lane Landfill for 2002.

Scope of Work

The scope of Groundwater sampling for this monitoring period comprised monthly sampling stipulated in the SOW, as summarized in Table 1.

Groundwater and surface water sampling was performed at the following locations:

• Quarry Springs
• Illinois Central Spring
• Slaughterhouse Spring

The approximate locations of these stations are shown on Figure 1, Monitoring and Sampling Locations.

Sample Collection and Handling

Samples at the spring locations were collected by carefully filling a new disposable beaker. The water was transferred from the beaker into pre-cleaned amber glass 1-liter bottles supplied by the analytical laboratory. Routine sampling parameters including temperature and conductivity were measured and recorded. Spring flow was also estimated and recorded.

Samples were analyzed by Heritage Lab of Indianapolis, Indiana. The samples were analyzed to a detection limit of 0.1 parts per billion (ppb) for all PCB parameters (except Aroclor 1221; detection limit 0.2 ppb) by EPA SW-846 method 8082. Samples were also analyzed for total suspended solids (TSS) by EPA method 160.2.

Quality Assurance

For quality assurance purposes a duplicate sample and a field blank were collected during each sampling event. All environmental and blank samples were labeled and logged onto a chain-of- custody form. The samples were stored and transported on ice in insulated coolers. Custody of the water samples was maintained by Viacom until shipment to the analytical laboratory. Samples LL10968, LL10973 and LL11068 were the field blanks for the sampling events reported herein. No PCB's were detected in any of these blank samples.

Analytical Results for Surface Water Samples

Field parameter measurements, PCB analytical results, and QA/QC results for water samples collected during this reporting period are reported in Table 2 - Quarry Springs, Table 3 - Illinois Central Spring, and Table 4 - Slaughterhouse Spring (attached). Copies of the chain-of-custody forms are provided in Appendix A. Historical (post-remediation) results are also provided in these copies of the certificates of analysis are provided in Appendix B. A validation summary for these samples appears in Appendix C. Copies of the field sampling data sheets are on file at the Bloomington Branch Office.

3.0 CONTINUOUS FLOW AND WATER LEVEL MONITORING

The purpose of flow and water level monitoring is to evaluate site-specific data characterizing site hydrologic response under storm and non-storm conditions, and to evaluate correlations between PCB concentrations, spring flow and Groundwater elevations.

Scope of Work

The scope of Groundwater level and flow monitoring during this reporting period involved the use of dedicated instrumentation to record water level and other parameters as summarized in Table 5.

Water lever transducers, water level data logging equipment, and piezometer crest gauges were operated during all or part of the period from November 2002 through January 2003 at the following locations:

Monitoring Location	Equipment
Illinois Central Spring	ICSTF instruments operated by IDEM contractor
MW-4i	In-Situ Troll 8000 transducer/datalogger (11/1-11/14 and 12/11-12/12) In-Situ Troll 4000 transducer/datalogger (12/13 - 12/17)
MW-6	In-Situ Troll 8000 transducer/datalogger (11/1-12/10 and 12/13-1/31)
MW-17	In-Situ Troll 8000 transducer/datalogger (12/12-12/13) In-Situ Troll 4000 transducer/datalogger (12/17- 1/31)
MW-18	In-Situ Troll 4000 transducer/datalogger (12/10-12/12) In-Situ Troll 8000 transducer/datalogger (12/12-12/17)
MW-19	In-Situ Troll 8000 transducer/datalogger (11/15-12/10 and 12/17-1/31) In-Situ Troll 4000 transducer/datalogger (12/12-12/17)
LF6-4	In-Situ mini-Troll transducer/datalogger (11/1-1/9)
00-370	In-Situ Troll 4000 transducer/datalogger (11/1-12/13)
00-387	In-Situ Troll 8000 transducer/datalogger (12/11-12/12)
PZ-BD	In-Situ mini-Troll transducer/datalogger (11/1 - 1/31)
PZ-AD	Crest gauge
PZ-AS	Crest gauge
PZ-BS	Crest gauge

The approximate locations of the above stations are shown on Figure 1, Monitoring and Sampling Locations.

Flow and Water Level Plots

water level elevation at LF6-4 and Piezometer BD

• water elevation and specific conductance at MW-4i, MW-6, MW-17, MW-18, MW-19 and MW-00-387 water elevation and temperature at MW-4i, MW-6, MW-17, MW-18, MW-l9, MW- 00-370 and MW-00-387
• water elevation and specific conductance at MW-4i, MW-6, MW-17, MW-18, MW- 19 and MW-00-387

Quality Assurance

As a quality assurance check, rainfall records for this time period were obtained from the Purdue University State Climatologist's web site (http://shadow.a~y.purdue.edu/sc.index.html) for the rain gauge station at the Monroe County Airport. This record was obtained for comparison to the site rain gauge data, which is located outside the PSARA office. Raw rainfall data from the web site appears in Appendix D. Monroe County Airport rain events of approximately 0.25 in. or more are indicated on the attached data plots.

As a further data quality check, manual water level measurements were made after significant storm events and specific conductivity was spot checked at two locations. The purpose of the manual checks was to verify instrument readings. Manual field check data collected during this reporting quarter are shown on the data plots.

A complete instrument maintenance log for all of the Lemon Lane Landfill installations is attached as Appendix E. This log details the installation, re-indexing, and maintenance histories of each transducer and data logger present at Lemon Lane Landfill during the 4th Quarter.

Discussion

The transducers installed at Lemon Lane Landfill were moved frequently during the fourth quarter as part of continuing investigative activities. These activities included a progressive flushing of wells that had been injected with dye during the summer and fall of 2002. in lieu of a detailed description of these activities, all transducer movements are noted on the continuous monitoring water level plots appended to this report.

The only data regarded as suspect are the specific conductivity data that were recorded by the Troll 8000 instruments. Hand checks at MW-6 and MW-19 near the end of January suggest that the Troll 8000 instruments may have overestimated specific conductance by as much as 60% during the 4th Quarter. This is now under investigation.

Crest Gauges

Crest gauges in three landfill cap piezometers (PZ-AD, PZ-AS, and PZ-BS) were monitored during the fourth quarter. Results presented in Table 6 indicate no apparent movement of any of the gauges during this quarter, which means none of the piezometers had a significant arno sl.t ot water in it.

If you have questions regarding the sampling and flow/water level monitoring activities or findings for this reporting quarter, please call Mike McCann at (812) 335-0424.

Sincerly,

Dorothy M. Alke
Project Director