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k` ■ KLEINFELDER <br /> .in enrPlon'c,nened mmn.�ny <br /> Filc No. 20-3978-03.W50 <br /> ' October 12, 1998 <br /> Mr. Ron Rowe, R.E.H.S. <br /> San Joaquin County <br /> Public Health Services Department <br /> Environmental Health Division <br /> 304 Eat Weber Street, Third Floor <br /> Stockton, California 95202 <br /> w <br /> RE: Additional Clarification <br /> Underground Storage Tank Closure <br /> Former Farmhouse Area <br /> Former Spreckels Sugar No. 2 <br /> 18800 South Spreckels Road <br /> Manteca, California <br /> Dear Mr. Rowe, <br /> In accordance with the request of Mr. Bing Kirk of Atherton Kirk Development Company, I am <br /> supplying you with additional information regarding the above-referenced underground storage <br /> tank. It is our understanding that your department has filed for concurrence for closure with the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB). <br /> As you know, the former Spreckels Sugar Plant No. 2 was constructed in approximately 1916. <br /> The northern portion of the property was an orchard, which was used to buffer the factory <br /> complex from the community. A small home was located at the northern edge of the property, <br /> south of the extension of Cottage Road. The house was serviced by a septic tank and a <br /> leachfield. The shop building (associated with the house) had a bathroom that was serviced by <br /> another septic tank and leachfreld. Both buildings were serviced by an onsite water supply well. <br /> The shop building had an underground storage tank (UST) which was removed in the mid- <br /> 1980's. Although hydrocarbons were not detected in the samples at the time of removal, the <br /> laboratory detection limits did not meet PHS/EHD standards. ,Therefore, regulatory closure was <br /> not issued. <br /> i <br /> In December 1996, borings were advanced in the septic systems and former UST areas. <br /> Benzene, toluene, ethylbenzene, and total xylenes (BTEX), MTBE, and Total Petroleum <br /> Hydrocarbons as Referenced to Gasoline (TPH-G) was not detected in any of the soil samples <br /> analyzed from the former UST area, the former fuel dispenser area, and the former fuel pipeline <br /> area. However, 0.51 µg/L toluene (laboratory reporting limit was 0.50 µg/L) was detected in a <br /> 20-3978-03.W50/20181,839 Page I of 3 <br /> Copyright 1998,Kleinfelder,Inc. October 12, 1998 <br /> KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 12091 948-1345 L-'091948-0621 fax <br />