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l <br />t <br />I <br />I <br />CLOSURE REQUEST REPORT <br />for <br />Ranuio Property <br />1789 W. Charter Way, <br />Stockton, CA <br />'i <br />1.0 INTRODUCTION AND PURPOSE <br />Ground Zero Analysis, Inc. (Ground Zero) has preparedthis report on behalf of Mr. Mark <br />Ranuio to summarize the results of the subsurface investigations at the subject property and to <br />present the information required for site closure review. This report is being submitted to San <br />Joaquin County Public Health Services Environmental Halth Division (PHS/EHD) and the <br />California Regional Water Quality Control Board (CRWQCB) to satisfy the closure review <br />i <br />requirements. <br />r <br />2.0 HYDROGEOLOGIC SETTING <br />The site is located at 1789 W. Charter Way in Stockton, CA (Figure 1). The site consists of <br />flat lying undeveloped land. No natural surface drainage orlwater bodies exist on the site. Site <br />elevation is approximately 5 feet above mean sea levels (USGS Topographic 7.5 Minute <br />If <br />Quadrangle Map, Stockton West, photorevised 1987). t <br />The nearest surface water body to the site is the Sang Joaquin River, which is located <br />approximately 4600 feet west-southwest of the site and flo I Ys northwest. <br />The subject site is located in San Joaquin County and lies on the gently sloping east flank of the <br />large northwest trending asymmetrical structural trough called the Central Valley, between the <br />Coast Range and Sierra -Nevada geomorphic provinces. The Central Valley contains a thick <br />sequence of sedimentary rocks of marine and continental origin which, in places, reaches great <br />depths. These sediments range in geologic age from Jurassic (205 million years before present) <br />I <br />groundzeVanuioklosure 1 <br />j <br />''I <br />