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Work Plan For well Installation and Feasibility Testing 3 Ranch Market Site 23569 South Santa Fe Road Riverbank Callfomta September 13 2000 geologist, working under the supervision of a California registered geologist One sample tube from each sampling interval will be sealed with teflon pads and plastic caps, then labeled and placed on ice in an insulated container for delivery to Kiff Analytical, LLC located in Davis, California All soil generated through drilling will be placed on plastic sheeting on site pending characterization Water generated by steam cleaning will be contained in a steam-clean trailer and temporarily stored on site in DOT approved 55-gallon drums Based on field observations (PID readings, lithology, odors, etc ), selected soil samples from the soil borings will be analyzed for benzene, toluene, ethylbenzene and xylenes (BTEX), total petroleum hydrocarbons-as-gasoline (TPHg), and methyl-tert butyl ether (MTBE), using U S Environmental Protection Agency (EPA) method 8260B (Table 2) 4.0 WELL INSTALLATION One air sparge well will be installed and constructed using 2-Inch diameter polyvinyl chloride (PVC) blank casing and 0 020-inch-slot well screen A five foot section of well screen will be installed from 40 to 45 feet bgs in the well Six soil vapor extraction wells will be installed and constructed using 2-inch diameter polyvinyl chloride (PVC) blank casing and 0 020-inch- slot well screen A seventeen foot section of well screen will be installed from 13 to 30 feet bgs in each SVE well A sand filter pack will be placed within the annulus of the well from the bottom of the boring to approximately three feet above the top of the well screen The annulus of the well will be sealed with 2-3 feet of bentonite on top of the sand, and a portland cement/bentonite slurry to the surface An 8-inch-diameter, traffic-rated, watertight street box will be installed to protect the well from surface traffic Refer to Table 1 for details concerning the proposed well completions 5.0 SOIL VAPOR EXTRACTION/AIR SPARGING FEASIBILITY TEST SECOR will conduct a two day SVE/AS feasibility test the Site A 12-hour soil vapor extraction feasibility test will be conducted on the first day and a 8-hour soil vapor extraction/air sparge feasibility test will be conducted on the second day A 250 scfm thermal oxidizer will be used to extract and treat the soil vapor prior to discharge to the atmosphere The thermal oxidizer will be operated using an electrical generator and propane as Fdc Ranch MnrkcAReports%RfrWct11mud F wibdityl WKPwpd