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• Groundwater Extraction Well Installation Summary Report Page 4 <br /> The Southland Corporation 455 Grant Line Road Tracy California December 6 1996 <br /> brass tube and slide hammer The sample tubes were checked to insure no head space was present, <br /> then sealed with Teflon tape, plastic caps, and tape The samples were labeled, placed on ice in an <br /> Insulated container, and transported under chain-of-custody manifest to WEST in Davis, California for <br /> analysis <br /> During sample collection, the soil was screened for the presence of volatile hydrocarbon vapors using a <br /> PID,the results are shown below <br /> Sample# Depth (SGS) PID reading (ppm) Sample Location <br /> S-1 1 foot 330 East Trench, middle vault <br /> S-1 5 feet 449 <br /> S-2 1 foot D 5 West Trench, northern vault <br /> S-2 5 feet 02 <br /> S-3 1 5 feet 04 East Trench, southern vault <br /> S-3 5 feet 580 <br /> S-4 1 foot 65 West Trench, north of tank pit excavation <br /> S-4 5 feet 4 <br /> Hydrocarbon odors were noted in the sod removed from the eastern trench, while minor degraded <br /> . gasoline odors were noted In the sod removed from the western trench (Appendix C) <br /> A total of eight soil samples were submitted for laboratory analysis of BTEX, MTBE, and TPH-G using <br /> EPA methods 8020/modified 8015 In addition, two soil samples were collected from the soil stockpile <br /> generated from the drill cuttings during installation of extraction wells GWE-2 and GWE-3 and from the <br /> trench excavations The two stockpile samples were combined in the lab into one composite sample, <br /> and analyzed for BTEX, MTBE, and TPH-G using EPA methods 8020/modified 8015, and total lead <br /> using EPA method 6010 <br /> 5 2 Groundwater Extraction Pump Installation and Sampling <br /> On November 7, 1996, Fluor Daniel GTI removed the groundwater extraction pump from GWE-1 and <br /> placed it into extraction well GWE-2, located in the former UST pit The power and control lines were <br /> pulled through the conduit and the pump was started Depending on the ability of the pump to dewater <br /> the tank pit and surrounding area, a second pump may be installed in groundwater extraction well <br /> GWE-3 <br /> Following installation and start-up of the groundwater extraction pump in GWE-2, Influent and effluent <br /> water samples were collected and analyzed for BTEX, MTBE and TPH-G using EPA methods <br /> 8020/modified 8015 per NPDES water discharge permit requirements <br /> 02311NST RPT(SThl 5 11 <br /> FLUOR DANIEL GTI <br />