Laserfiche WebLink
�1ALTON <br /> GEOSCIENCE <br /> April 19, 1999 <br /> San Joaquin County Public Health Services <br /> 304 East Weber Street, Third Floor <br /> Stockton, California 95202 25-0740-02 <br /> ATTN: MS. CAROL OZ <br /> SITE: CHP FACILITY <br /> 3330 NORTH AD ART ROAD <br /> STOCKTON, CALIFORNIA <br /> RE: SUBSURFACE INVESTIGATION REPORT <br /> Dear Ms. Oz: <br /> Alton Geoscience submits this Subsurface Investigation Report for the California Highway Patrol <br /> (CHP) facility, located at 3330 North Ad Art Road in Stockton, California (Figure 1). <br /> 1.0 OBJECTIVES <br /> The site assessment activities were performed to determine if any contaminated soil exists in the <br /> immediate vicinity of an existing gasoline underground storage tank (UST) at the above referenced <br /> site. This investigation was performed at the request of San Joaquin County Public Health Services <br /> as part of permitting the single wall fiberglass UST to meet the 1998 upgrade requirements. <br /> 2.0 SITE DESCRIPTION <br /> The site is currently a CHP Station with a gasoline UST and pump for fueling CHP vehicles <br /> (Figure 2). <br /> The site is located about 1,000 feet east of Highway 99 at an elevation of approximately 30 feet <br /> above mean sea level (NGVD-1929). Topography in the vicinity of the site is relatively flat, <br /> sloping slightly to the west. <br /> The site lies in the Central Valley of California. Geologically, the valley is a large asymmetric <br /> trough that is bounded by pre-Tertiary granitic, metamorphic, and marine sedimentary rocks. The <br /> trough has been filled with as much as 30,000 feet of sediment in the San Joaquin Valley to the <br /> south and as much as 60,000 feet of sediment in the Sacramento Valley to the north. These <br /> sediments range in age from Jurassic to Holocene and include both marine and continental <br /> sedimentary deposits (USGS 1986). <br /> 30A Lindbergh Avenue <br /> Livermore,California 94550 <br /> (510)606-9150•FAX(510)606-9260 <br />