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PUBLIC YIEALTH SERVICES <br /> PpUlry <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer $ <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 * Stockton, CA 95 - 3 `4 FQ.�'i <br /> 209/468-3420 <br /> MAILED MAR 2 71996 <br /> STOCKTON PLATING INC <br /> P O BOX 6090 <br /> STOCKTON CA 95206 <br /> RE: Stockton Plating, Inc. SITE CODE: 1986 <br /> 632 South El Dorado <br /> Stockton <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) is the lead <br /> agency providing the oversight of the investigation and cleanup of releases from underground storage <br /> tanks within San Joaquin County. The above referenced site was placed in the Local Oversight <br /> Program on April 1, 1991. <br /> PHSIEHD has completed review of the Corrective Action Plan (CAP) and most recent Quarterly Report <br /> prepared by Advanced GeoEnvironmental, Inc. Groundwater contamination remains present in high <br /> concentrations (TPH-Gas 230, Benzene 41, Toluene 52, Ethyl benzene 4.9, Xylene 24, all results in <br /> ppm) in the area previously occupied by a 2,000 gallon gasoline underground storage tank which was <br /> removed December 11, 1990. <br /> The CAP contains specific information relating to site history, geology, soil/ground water petroleum <br /> hydrocarbon plume delineation, and aquifer/soil vapor extraction testing. In addition, a feasibility study <br /> was presented which selected vapor extraction as the corrective action technology for site remediation. <br /> The conceptual design of the vapor extraction system (VES) appears appropriate for the site geology <br /> and contaminants identified. Additional extraction wells/points may be needed in the area of soil <br /> contamination in order to increase system influence and efficiency as proposed in the CAP. The VIES <br /> effectiveness will be dependent upon soil permeability and radius of influence between extraction <br /> points. <br /> In addition, before installing any additional wells you must secure required permits from PHSIEHD. <br /> Please submit permit applications and fees to this agency for permit issuance. <br /> If you have any further questions regarding the matter, contact Harlin Knoll at (209) 468-3442. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Harlin Knoll, Senior REHS Margaret Lagorio, REHS <br /> Site Mitigation Unit Lead Senior <br /> hk/632cap <br /> A Division of San Joaquin County Health Care Services <br />