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S ECOR ` <br /> FIELD AND LABORATORY PROCEDURES <br /> Soil Stockpiling and Sampling <br /> Soil cuttings generated during drilling operations will be temporarily stored onsite on and covered <br /> with plastic sheeting pending characterization and disposal. Soil cuttings will be removed by <br /> Chevron's disposal contractor to an appropriate disposal facility. Water generated during steam <br /> cleaning, and sampling of the borings will be temporarily stored in DOT-approved 55-gallon drums <br /> pending transport by Chevron's disposal contractor to an appropriate disposal or treatment facility. <br /> Laboratory Analysis <br /> Selected soil samples collected will be analyzed for total petroleum hydrocarbons as gasoline <br /> (TPHg) by EPA Method 8015, and benzene, toluene, ethyl benzene, total xylenes (BTEX), methyl <br /> tertiary butyl ether (MtBE), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl <br /> ether (EtBE), tertiary amyl methyl ether (TAME), 1,2-dichlorothene (1,2-DCA), and ethylene <br /> dibromide (EDB) by EPA Method 8260 and total lead by EPA Method 6010. <br /> Well Destruction <br /> Four groundwater monitoring wells will be destroyed in accordance with San Joaquin County <br /> requirements and with Bulletin 74-90: California Well Standards, California Department of Water <br /> Resources, June 1991. The wells will be destroyed by drilling out and removing all material within <br /> the original borehole including the well casing, screen, filter pack, and annular seal to the total depth <br /> of the well. A centralizing plug with a cold role steel stinger will be used to keep the augers centered <br /> on the wells. The boreholes will then be grouted from the bottom of the borehole to the surface <br /> using a tremie pipe and cement-bentonite grout. The wells will then be completed to grade with a <br /> material matching the existing surface. SECOR will oversee the destruction. <br /> I <br /> i <br /> it <br /> i <br />