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GeoHydrologic Consultants, Inc and both isolation valves were placed inside a newly installed 18-inch round flush mounted well box which was concreted into place The concrete was dyed black at the surface to match the surrounding asphalt surface of the station A copy of the well completion logs and associated boring logs are included in Appendix A Well completion/development details are summarized in Table 3 along with historic well data Well survey information was not available at the time of this report ' 4.2 Soil Sampling and Analysis The boring for well EW-513 was drilled using a hollow-stem auger-drilling rig Soil samples were collected at 5-foot intervals for laboratory analysis and soil descriptions A total of seventeen soil samples were collected for laboratory analysis (5 to 85 feet) Soil ' types and other pertinent information were recorded on a field boring log in accordance with the Unified Soil Classification System Boring logs are included in Appendix A Hydrocarbon vapors, if any, from each soil sample were also recorded on the field log ' Soil samples were collected in stainless rings that were capped with Teflon sheeting and plastic caps Each sample was packaged, labeled, and placed in an ice-chilled cooler in ' preparation for delivery to a State-certified analytical laboratory All soil samples were delivered to the laboratory within 24 hours after collection Golden State Overnight shipping service was utilized to ensure that the collected soil samples arrived to the laboratory within 24 hours Soil samples collected from the newly installed deep extraction well (EW-513) were ' analyzed by Associated Laboratories (Associated) of Orange, California, which is a State-certified laboratory for the test methods implemented Each soil sample was analyzed for TPHg by EPA Method 8015 Modified, and for benzene, toluene, ' ethylbenzene, and xylenes (BTEX), MTBE, and other oxygenates ethyl tert butyl ether (ETBE), di-isopropyl ether (DIPE), tert amyl methyl ether(TAME), and tert butyl alcohol (TBA) by EPA Method 8260B Each soil sample was also analyzed for ethanol ' and methanol by EPA Method 8015M, and for lead by EPA Method 6010B All sampling equipment was washed in a soap solution and then rinsed twice prior to ' sampling in an effort to minimize cross-contamination All drilling cuttings were stored in Department of Transportation (DOT) approved 55-gallon containers pending proper disposal In addition, all drill augers were steam-cleaned between holes to minimize cross-contamination The rinsate from this process was also stored in DOT approved 55- gallon containers ' 4.3 Groundwater Sampling and Analysis ' On February 9, 2005, Thrifty gauged and sampled nine on-site wells (T13-1, MW-2, MW- 3R, MW-4, MW-5, MW-6, TB-7, TB-8, and TB-10) Results of the groundwater analysis for these wells was incorporated into this report, including the current groundwater ' elevation data(February 9, 2005) which were used to update the groundwater elevation TOC 171 Pilot Study Page 7