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A'I"rAC,IIMI.NT B FIELD AND LABORATORY PROCEDURES (CONTINUED) — -- Chevron 9-3232 8660 Lower S.icriiiiei)to Ro.icl Stool.ton, ['t1 `_ Soil Sampling for Stockpiled Soil Soil samples will be collected by advancing a 2-inch diameter brass sample liner into the soil stockpile, after removing approximately 6-inches to 1-foot of surface material in the sample location One composite sample will be collected per approximately 100 cubic yards of soil Soil samples for chemical analysis will be retained in the brass liners, labeled, and capped with Teflon sheets and plastic end caps The samples will then be sealed in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain-of- custody documentation Laboratory Procedures for Soil and Groundwater Samples Selected soil and groundwater samples will be analyzed for the presence of TPHg and methanol using modified EPA Method 8015, BTEX by EPA Method 8020, and MtBE, TBA, 1-2 DCA, DIPE,ELBE,TAME,EDB, and ethanol by EPA Method 8260 Slug Testing The slug test consists of quickly raising (slug in) or lowering (slug out) the water level in a well from equilibrium and measuring the subsequent rate of rise or fail, respectively Slug in and slug out tests will be performed on each well using a slug of know volume to derive values for transmissivity (T) and hydraulic conductivity(K) i Soil Cuttings and Rinsate Water Soil cuttings generated during dnlling operations will be temporarily stored onsite and covered with plastic sheeting pending characterization and disposal Soil cuttings will be removed by Chevron's disposal contractor to an appropriate disposal facility Water generated during steam cleaning will be temporarily stored in DOT-approved 55-gallon drums pending transport by Chevron's disposal contractor to an appropriate disposal or treatment facility Soil cuttings and ansate water drums will be temporarily stored onsite for approximately 4 to 8 weeks