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L�o Gt�U/D <br /> i <br /> EAST'BAY fwwfiC/PAL U7W)rY DISTRICT �,,o A,JELNE VQEFr PO t:OX .;_,. A.-_.r. <br /> V <br /> June 17 , 1988 <br /> D <br /> ErIVIROMEN,TAE HEALTH <br /> Mr. Ronald Valinotti PERMIT/SEWICES <br /> Acting Director <br /> San Joaquin Health Department <br /> P. 0. Box 2009 <br /> Stockton, CA 95201 <br /> Dear Mr. Valinotti: <br /> Re: Soil and Groundwater Assessment Plan: EBMUD-Stockton <br /> Center, 1804 Main Street, Stockton, CA <br /> This letter transmits the District ' s plan to assess the site <br /> impact of the 1000 gallon storage tank which was removed from <br /> the Stockton Center Facility. The plan was prepared by <br /> J. H. Kleinf elder & Associates to meet the County' s Leaking <br /> Underground Storage Tank Investigative Format for site assess- <br /> ment. The scope of work will include the following activities: <br /> o A series of soil borings will be drilled along lines <br /> radiating away from the tank excavation area. Initial <br /> soil borings will be placed 10 to 20 feet away from the <br /> tank excavation area. Samples will be collected at 5-foot <br /> intervals to an estimated depth of 30 feet or presence of <br /> petroleum hydrocarbons. <br /> o Soil analyses will be performed on samples from four <br /> initial soil borings closest to the tank excavation area. <br /> Each sample will be analyzed for volatile aromatics by EPA <br /> Method 8020 , and total petroleum hydrocarbons by Meth- <br /> od 3550 and GC/FID. Three samples will be analyzed for <br /> ethylene dibromide and organic lead. Modified DHS Meth- <br /> od AB1803 and DHS LUFT Method will be used to analyze <br /> constituents, respectively. <br /> o Three ground water monitoring wells will be installed to <br /> assess the presence of petroleum hydrocarbons in the <br /> ground water. Monitoring wells will be constructed in <br /> three of the last soil borings. Monitoring wells will be <br /> installed in soil borings that do not indicate a high <br /> concentration of petroleum hydrocarbons. This procedure <br /> BOARD Of OIRFC[ORS. SAr^ ORU Y srdcw Kf•^JNf J H KUf Iv::^.Pa: L! f',e s r.e•,� <br /> HEIENHURKE JACKHILL WALIfRR.WILAN KfNNf INH.SNiWONS +JLGRY C. .✓s>rkf rf <br />