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to 5 volumes of water or until groundwater parameters of pH, temperature, and conductivity ' stabilized as measured by portable meters calibrated to a standard buffer and conductivity standard (Appendix B) Groundwater samples were then collected by lowering a clean ' disposable bailer into the well and collecting a representative sample of the formation water The groundwater sample was slowly transferred to laboratory-cleaned sample containers, sealed with ' Teflon'lined caps, and transferred to cooled storage The samples were then transported under suitable chain-of-custody to a State of California certified laboratory for the requested testing 3 7 Drill Cuttinias and Wastewater All soil cuttings generated during drilling operations were placed on and covered with plastic sheeting During drilling and sampling operations, all tools and down hole sampling equipment ' was steam cleaned prior to use Mnsate and purge water generated during drilling and sampling operations and was stored in DOT-approved drums pending disposal evaluation 4.0 RESULTS ' 41 Soil The soil beneath the site consists predominantly of silts and sands In general, a dark to ' moderate yellowish brown, clayey silt and fine sandy silt was encountered from ground surface to 30 feet bgs From 30 feet bgs to approximately 50 feet bgs, a yellowish gray, or salt and ' pepper colored, medium to coarse grained sand was observed From approximately 50 to 60 feet bgs a coarse sandy gravel was encountered, this layer varied in thickness from 5 to 15 feet A ' fine grained, greenish black, silty clay was then encountered to the total depth of 100 feet bgs The drill logs are included in Appendix B Selected soil samples were analyzed at Excelchem Environmental Labs using U S Environmental Protection Agency (EPA) Method 5030/8015 (modified) for FPI Ig and EPA Method 8020 for benzene, toluene, ethylbenzene and xylenes (BTEX) h+h No N000S OM 01 Si f Uh IO(l.h It PT — �1 eta ric 1