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t <br /> SO L I D WAST E <br /> S YSTEIVIS I N C. N O V 2 9 1939 <br /> ENVIRONMENTAL HEAL TL.I <br /> PERN41T/SERViUS <br /> November 28, 1989 <br /> Mr. Tom Peltier <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road Suite A <br /> Sacramento, CA 95827-3098 <br /> RE: Work plan for further investigation of groundwater <br /> contamination at Stockton Scavenger Assoc. in Stockton, CA. <br /> Dear Mr. Peltier: <br /> The following letter proposal is in response to your request for <br /> the submittal of a work plan for the investigation of groundwater <br /> contamination at the Stockton Scavenger Association operations <br /> facility in Stockton, CA. The request for additional investigation <br /> stemmed from the detection of hydrocarbons in one of three <br /> monitoring wells that had been installed at the site as the result <br /> of leakage from underground fuel tanks. A brief site history is <br /> presented along with a description of the procedures to be <br /> implemented during the groundwater investigation. A discussion of <br /> the contents of a follow-up report is also included. <br /> SITE HISTORY <br /> The Stockton Scavenger operations facility is located at 1240 Navy <br /> Drive in Stockton, CA (Figure 1) . The facility, which covers <br /> approximately 7 acres, provides maintenance and associated <br /> management to a fleet of refuse collection vehicles that service <br /> the Stockton area. <br /> In March of 1988, a 7500 gallon diesel fuel tank and a 500 gallon <br /> hydraulic motor oil tank were removed from the site. Confirmation <br /> samples taken from the sides of the excavation revealed elevated <br /> levels of hydrocarbon contamination. A subsequent investigation <br /> into the extent of the soils contamination delineated the boundary <br /> of the tainted soil which was excavated in September of 1988. <br /> These soils are currently being treated via bio-remediation at the <br /> site. <br /> x <br /> s <br /> Y <br /> 1 <br /> E <br /> E <br /> s <br /> FIVE THOMAS MELLON CIRCLE, SUITE 266, SAN FRANCISCO, CALIFORNIA 94134 (415) 330-1000 <br /> EXECUTIVE OFFICES FAX(415)330-1134 ACCOUNTING &ADMINISTRATIVE FAX(415)330-1188 ENGINEERING &DEVELOPMENT FAX(415)330-1115 <br />