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Closure Summary Report <br /> ort <br /> BOGETTI'S ORCHARD SERVICE STATION <br /> 2393 East Highway 132, Vernalis, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Albert Bogetti,Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> closure summary report for the Bogetti's Orchard Service Station site located at 2393 East Highway <br /> 132, Vernalis, California (Figure 1) The purposes of this report are to summarize site assessment <br /> and corrective action activities at the site to date, estimate the remaining amounts of <br /> MTBE-impacted soil, and provide justifications for a site closure request In addition, this report <br /> presents the results of ground water monitoring activities conducted during April 2003 <br /> This report is prepared in accordance with guidelines established by the Regional Water Quality <br /> Control Board(RWQCB)Tri-Regional Board StaffRecornmendations for Preliminarylnvestigations <br /> and Evaluation of Underground Tank Sates dated 10 August 1990 <br /> 2.0. SITE BACKGROUND <br /> • Bogetti's Orchard Service Station is located in a business/agricultural area of northern Vernalis, <br /> California, in southern San Joaquin County, the southern boundary of the site abuts Highway <br /> 132 (Figure 1) Three structures are located on the property,including a produce stand and restaurant <br /> A fuel service station was operated on the site up until late 1998 <br />' 2 1 REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING <br /> Based on Geologic Map of California, published in 1977 by the State of California Department of <br />' Mines and Geology, the site is located within the Great Valley of California, a large, elongate <br /> northwest trending, asymmetric structural trough The Great Valley Province has been filled to its <br /> present elevation with thick sequences of sediment ranging in age from Jurassic to Recent,creating <br />' a nearly flat-iymg alluvial plain, extending from the Tehachapi Mountains in the south to the <br /> Klamath Mountains in the north The western and eastern boundaries of this province are comprised <br /> of the California Coast Range and the Sierra Nevada,respectively Rocks composing the basement <br />' complex of the province have not been completely defined but are believed to be metamorphic and <br /> igneous in origin The Great Valley Province is subdivided into two mayor divisions designated as <br /> the Sacramento and San Joaquin Valleys <br /> The nearest surface water feature in the vicinity of the property is the San Joaquin River <br /> approximately 5,000 feet northeast of the site A domestic ground water well is located on the site <br /> 1 <br /> • <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />