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OF1:101GROUNDWATER <br /> CO❑❑ TECHNOLOGY, INC. 4057 Port Chicago Highway Concord CA 94520(415)6712387 <br /> FAX (415)685 9148 <br /> October 15, 1992 <br /> Project No 020502819 <br /> Mr Steve Schneider OCT 15 1992 <br /> San Joaquin County Public Health Services <br /> 445 N San Joaquin Street ENVIRONMENTAL HEALTH EN <br /> Stockton, CA 95201 PERMIT/SERVICES <br /> RE Quarterly Groundwater Monitoring and Sampling Report <br /> Manna Pro Facility <br /> 4004 S EI Dorado <br /> Stockton, California <br /> Dear Mr Schneider <br /> Groundwater Technology, Inc Is pleased to submR this Quarterly Groundwater Monitoring and <br /> Sampling Report for the quarter ending August 31, 1992 Groundwater monitoring and sampling and <br /> preparation of this report were performed according to Section 2652(4) of the Underground Storage <br /> Tank Regulations (California Code of Regulations, Title 23, Subchapter 16), and as requested in the <br /> May 20, 1991 letter from Public Health Services (PHS) to Mr Dean Willis of O'Meiveney and Myers <br /> According to the May 20, 1991, letter, this report presents <br /> o Status of site investigation and cleanup activities, <br /> ■ Groundwater monitoring data, and <br /> ■ Groundwater quality data <br /> Status of Site Investigation and Cleanup Activities <br /> Since the discovery of the petroleum hydrocarbon contamination at the Manna Pro site, a site <br /> investigation has been performed to delineate the extent of the impact to soil and groundwater The <br /> Impact apparently is the result of loss of product from five underground storage tanks and <br /> associated piping that were removed in June 1990 Soil from the tank removal and further pit <br /> excavation (to define the limits of the impacted soil) has been stockpiled on the site Currently the <br /> tank pit excavation remains open, and the excavated soil has been segregated into stockpiles of <br /> clean and impacted soil <br /> The extent of petroleum hydrocarbons in the soil and groundwater has been evaluated in Soil and <br /> Groundwater Investigation at Manna Pro, Inc Facility, dated December 1990, prepared by ERM- <br /> West, Inc In our letter to the PHS dated August 28, 1991, the overall remedial strategy for soil and <br /> Offices throughout the US Canada and Overseas <br />