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File No. 1817-9 <br /> 8 April 1988 <br /> INTRODUCTION <br /> Anderson Geotechnical Consultants has been retained by the Office <br /> of the State Architect to prepare a Leak Detection Plan for all <br /> underground fuel storage tanks at state-owned facilities located <br /> within a 16 county region of central California. The counties <br /> located within this region (OSA Region III) are Alpine, Amador, <br /> Colusa, Calaveras, E1 Dorado, Nevada, Mariposa, Merced, San <br /> Joaquin, Stanislaus, Sacramento, Placer, Yolo, Solano, Yuba, and <br /> Tuolomne. Our investigation has consisted of performing site <br /> visits to each of the involved facilities and collecting <br /> information required to recommend an appropriate Leak Detection <br /> plan for the tanks at each facility. <br /> SCOPE <br /> This package contains information specific to the tank(s) located <br /> at: <br /> Carnegie SVRA <br /> Department of Parks and Recreation <br /> 18600 Corral Hollow Road <br /> P.O. Box 1105 <br /> Tracy CA 95378 01105 <br /> Additionally, it contains a description of the Monitoring <br /> Alternatives, as specified in the Underground Storage Tank <br /> Regulations, that may be appropriate for use at this facility. <br /> We have noted which Monitoring Alternative we feel would be most <br /> applicable for use at this facility. <br /> GROUNDWATER INFORMATION <br /> The facility is located in the San Joaquin Valley Groundwater <br /> Basin. Groundwater in this area is presently used primarily for <br /> agricultural purposes, although it could be used in the future <br /> for multiple=abandone; <br /> i 1 uses including domestic or agricultural. <br /> There is one groundwater well located approximately 100 <br /> yards from tity. We are not aware of any other <br /> groundwater wells within .5 miles of the facility. The local <br /> groundwater table elevation varies between 0 and 20 feet below <br /> the ground surface. The groundwater gradient is not known, <br /> however, the direction is probably toward the northwest. <br /> Groundwater elevation varies with time of year, rainfall pattern, <br /> fluctuation of the nearby creek, and other factors. The local <br /> ground surface is flat-lying. The facility is underlain by <br />