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Fuller Mobile Home Park <br /> 365 E. Louise Ave.,Lathrop, California April 3, 1998 <br /> Vertical and Laterial Fxtent Confirmation Work Plan (Revised) Page. 3 <br /> All borings will be drilled in such a manner as to prevent cross contamination <br /> L between strata. Exploratory soil borings within the unsaturated zone will be <br /> backfilled with a cement and three percent(3%)Bentonite mixture. <br /> The cuttings from the drilling operation will be containerized on-site during drilling <br /> for proper disposition. The proper method of disposal will be dependent upon <br /> results of laboratory analysis. This disposal will be the responsibility of the client <br /> unless other arrangements have been made. <br /> 3.2 Soil Sampling <br /> All soil sampling equipment will be thoroughly cleaned before and between <br /> sampling to prevent cross contamination. Relatively undisturbed soil samples will <br /> be taken at intervals of not more than 5 feet in order to evaluate the subsurface <br /> materials, however, this sampling interval may be waived in saturated sands in <br /> which sample recovery is not possible. <br /> The soil samples will be taken using a California Modified Split Spoon sampler with <br /> brass liners. The sampler will be driven continuously by a wire line hammer. <br /> The laboratory samples will not have heads ace and will be immediate) sealed in <br /> P P Y <br /> L their liners using aluminum foil-lined plastic caps. The remaining sample will be <br /> removed from it's liner to be used as an aide to the on-site specialist in logging the <br /> material at that depth. <br /> Soil samples collected for analysis will be analyzed using EPA Method 8015 <br /> modified for total petroleum hydrocarbons in the gasoline range, EPA Method <br /> 3510/LUFT for diesel range petroleum hydrocarbons, EPA Method 8020 for <br /> BTX&E compounds and EPA Method 8260 for oxygenates. The minimum detection <br /> limits used for each analyte will be .005 mg/kg for BTX&E, and 2.5 mg/kg for <br /> gasoline, and 1.0 mg/kg for diesel. Analyses are to be conducted by California <br /> Laboratory Service, Inc., a State-certified laboratory in Rancho Cordova, <br /> California. <br /> OvIga10 <br /> Prepared by: <br /> INo.0" <br /> fir <br /> Expires:June 30,199 <br /> W. H. Fox, H, RE, <br /> California Registered Environmental Assessor#00620 pjr CAOf0�� <br />