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'RM % surface . The first aquifer, consisting of highly perms terminates between 56' and 60' below the surface into concentrations of MTBE to 3 ug/L as of the last monitor to 14 mg/L, and Benzene is present to 13 ug/L, as per the varies seasonally from 42 to 49 feet below the surface. Existing Equipment Installed on the Site. The site has been recently developed with new buildir commercial business. During construction the develope future remediation equipment. Also during construction, extraction well location. A 6" extraction well was instal. the very successful pump test performed by ATC duri n Pump Test Report Attached). Recap of the Pump Test Results Using the Theis Solution method the average Storage bMuctivity was 0.612 cm/sec. The short steady state Influence (ROI) of greater than 90 feet (the furthest me time of the pump test the static groundwater level was - n D sand, begins a 45' below the surface and y sand. This aquifer is contaminated with event. TPHg is also present in concentration monitoring event. The groundwater surface construction comprising a bank office and built a 10'x 21' underground vault to contain L conduit was laid from the vault to a proposed -d in a 15" soil bore at this location as part of January and February of this year (see ATC :nt (S) was 2.4E-3 and the Hydraulic e rate was 13.5 gpm with a Radius of well from the extraction well). At the - 49' below the surface at the extraction well. Remediation Technology Available /;fuel�ii i sites in'�ife aiea or S"'outnwMLodi hame used t"kctivatted C" filtratift as a "hili and Treat" filter. This type of remediation was also used to reclaim the effluent from the above referenced pump test conducted by ATC. Other technology such as Air Sparging and Bioremediat on have been tried, but have failed to remove MTBE to non defect levels. "Phese methods have founds cess on TPHg and BETX compounds atW have reduced the levels of MTBE, but not to acceptable lev As. Due to the success of Activated Carbon filtration for MTBE and Benzene on other sites in the Lodi area, this technology is proposed for the pump and treat remediation of this site. The Pmposed Filtration Plant Design USfilter's Westgate division has proposed the use of three ASC -2000 Carbon Filter units connected in series to handle the filtration requirements of this pump and treat system. These filters are designed to process 10 to 25 gpm of effluent, with the above stated an ysi s, to non detect level. A sample monitoring point will be installed before and after the Activated Ca bon filters. A submersible extraction pump would supply the require hydraulic head to operate the extraction well, carbon filter, and conveyance to the storage tank (see Fig. 1, next page). A 21,000 gal. portable Baker tank will be positioned in the parking lot to the north of the existing driveway and serve as clean water storage (see plan of Filtration Plant attached). A I' PVC discharge line will be placed in a ��o wide by deep trench in the driveway asphalt surfacing. Backfill of the trench will be with paving asphalt to the finish surfacing grade. An 1" discharge hose will be required for the connection to the Baker tank. Discharge from the Baker tank to the tanker truck will be by 4" suction hose to a 4" pump with a discharge hoes.. 2