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KUM N FELDER <br /> September 14, 1989 <br /> File: 24-216100 A00 <br /> Ms. Eleanor Ratliff <br /> San Joaquin County <br /> Public Health Services ' <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95201 <br /> Dear Ms Ratliff: <br /> The following letter addresses your request for additional information to supplement our <br /> application to drill soil borings and monitoring wells on the Santa Fe Real property at <br /> 1.515 West Weber Street in Stockton. We hope that you are able to review Realty <br /> ter and <br /> approve our application quickly so that the project can proceed as soon as possible. <br /> Previous Investigations <br /> On November 16, 1988, a 2,000-gallon unleaded gasoline tank was removed at 1515 West <br /> Weber Street. A soil and water sample were collected from the tank excavation by FGL <br /> Environmental under San Joaquin County supervision, and were analyzed for TPH, BTEX, <br /> EDB, and lead. The following table outlines the results of those analyses. <br /> Soil Water <br /> TPH 250 mg/kg 110 ug/l <br /> Benzene 190 ug/kg 5100 ug/1 <br /> Toluene 590 ug/kg 23,000 ug/1 <br /> Ethylbenzene 280 ug/kg 11,300 ug/l <br /> Xylene 1100 ug/kg 56,000 ug/l <br /> EDB ND ug/kg ND ug/l <br /> Lead 6 mg/kg 2.6 mg/l <br /> Quantity and Composition of Liquid Leaked <br /> Based on the history of the tank, the liquid leaked is probably unleaded gasoline. The <br /> quantity leaked or spilled is unknown. <br /> History of Site <br /> The property at 1515 West Weber Street was previously used as a railway yard. It is <br /> currently leased by General Potato and Onion, and is subleased to Farmers Bag and <br /> Supply. The exact dates that the area was used for a railway yard are not known. The date <br /> when the underground fuel tank was installed is not known, nor is the date when it ceased <br /> to be used. <br /> Local Geology,Topography <br /> The property is located adjacent to the Stockton Deep Water Channel in the San Joaquin <br /> River Delta. The site is underlain by hundreds of feet of alluvial clays, silts, and sands. <br /> The Stockton Deep Water Channel flows into the San Joaquin River approximately 1.5 <br /> miles southwest of the site. The land surface is the vicinity of the site is approximately 10 <br /> feet above mean sea level and is essentially flat except where cut by river channels. <br /> KLEINFELDER 9795 Business Park Drive, Sacramento, CA 95827 (916) 366-1701 <br />