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u�T E_ '' 1E:41 LE'-.II[ -FF'.I:_E:;E,fl.B. F' LEVINE•FRICKE assess possible transport of chemically-affected sediments in water. In areas known to be underlain by peat or rubbish fill, an organic vapor analyzer (OVA) with a flame ionization detector (FID) will be used to screen soil gas for the presence of meth- ane. This will be accomplished by placing the OVA probe down into the borehole to a depth of 3 feet or greater, depending upon the depth to ground water at the location, and measuring methane concentrations in the borehole vapors. Ggneral PgoctdUrs Soil samples will be collected at selected intervals from each of the deeper borings for lithologic description. For locations where there is a suspected source of volatile hydrocarbons, a portable organic vapor analyzer (M) will be used during the sampling to help select samples for chemical analysis. Soil samples for ehemical .analysis will be collected using a modified California Sampler containing clean brass tubes or liners, or laboratory-supplied glass jars. These samples will be immedi- ately sealed and placed in chilled coolers for transport to the laboratory for analysis. All drilling and sampling equipment will be steam-cleaned prior to each use. Ground-water samples will be collected from the bottom of the deeper borings using a bailer. Water sampleswill be transfe - red to appropriate, laboratory-supplied immedi- ately placed in chilled coolers for transport to the laboratory, surface water samples will be collected and handled similarly. After samples have been collected, the shallow boreholes will be backfilled with the extracted soil mixed with bentonite powder, and the deeper boreholes will be sealed using a cement-bentonite grout. waste soils produced by the drilling and sampling will be placed in storage vessels supplied by Levine,Fricke. However, the cost of disposing of these wastes, should they be found to contain hazardous concentrations of chemicals, will not be the responsi- bility of Levine- Fricke, and therefore such costs are not included in the estimated budget. it is understood that Grupe company will be considered the generator of these wastes. Levine-Fricke will assist Grupe in evaluating disposal options after receiving analytical results. Task , 6: Laboratory Analysis The eight composited shallow soil samples (one-foot depth) col- lected from the site will be analyzed by a California-certified laboratory for selected classes of pesticides known to be more -3-