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05/08/01 16:36 V1 510 521 5078 HETI-ALAMEDA 002/002 <br /> •� lT 3394 Mariner Square Drive,Suite 2 <br /> Alameda,California 44501 <br /> Tel.510.521•26PA <br /> NC. Fax 510.531-5078 <br /> 1.800-347-HETI <br /> Massachusens <br /> New York <br /> Maryland <br /> Ncw Jersey <br /> May 8,2001 <br /> Ms.Lon Duncan <br /> San Joaquin County Public Health Services, <br /> Environmental Health Division <br /> 304 E.Weber Avenue,V Floor <br /> Stockton,CA 95202 <br /> Ile: 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 (BTEX1 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 /> William E.Motzer,Ph-D.,R.G. <br /> Western Regional Manager <br /> Attachment: <br />