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r <br /> 11YD 2394 Mariner Square Dnrt Suite 2 <br /> FJ NWNTAL 2 Alameda alifnrnia 44501 <br /> 46�IN l 2684 <br /> L"lls,INC. Fax S10 521 5078 <br /> HETI <br /> Massnassachushuscns <br /> New York <br /> Maryland <br /> New.Jersey <br /> May 8, 2001 <br /> Ms Lori Duncan <br /> San Joaquin County Public Health Services, <br /> Environmental Health Division <br /> 304 E Weber Avenue, 3'd Floor <br /> Stockton, CA 95202 <br /> Re: Ground Water Monitoring Well Installation Drill Cuttings Soil Disposal at the Central <br /> California Traction Company at 1645 Cherokee Lane, Stockton, CA <br /> Dear Ms Duncan <br /> Between August 28 and 29, 2000, Hydro-Environmental Technologies, Inc (HETI) installed three ground <br /> water monitoring wells, using hollow stem auger, on the Central California Traction Company property at <br /> 1645 Cherokee Lane in Stockton, California The monitoring wells were installed to monitor ground <br /> water contamination from removed gasoline and diesel underground storage tanks Monitoring wells <br /> were installed directly through previous direct push borings, which were sampled at 5 0-foot intervals <br /> beginning at 10 feet below surface grade Drill cuttings were placed in 55-gallon drums that were sealed <br /> and stored on site pending sample analyses <br /> Soil samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline by U S Environmental <br /> Protection Agency (USEPA) Method 8015M, TPH as diesel, benzene, toluene, ethylbenzene and total <br /> xylenes (BTEX) and methyl-tertiary butyl ether (MTBE) compounds were analyzed by USEPA Method <br /> 8020, and five fuel oxygenates by USEPA Method 8260 No detectable concentrations of TPH as <br /> gasoline, TPH as diesel, BTEX, or the five fuel oxygenates were found in the 46 soil samples submitted <br /> for analysis Certified laboratory data sheets and chain of custody forms for the collected soil samples are <br /> attached <br /> Because the drill cuttings contained no measurable petroleum hydrocarbons, HETI requests on site <br /> management of the soil cuttings by the Central California Traction Company <br /> Sincerely, <br /> Hydro-Environmental Technologies, Inc <br /> kw",— � Ff, <br /> William E Motzer, PhD , R G <br /> Western Regional Manager <br /> Attachment <br />