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California Regional Water Quality Control Board o <br /> Central Valley Region o D� • <br /> Winston H.Hickox Robert Schneider,Chair Gray Davis <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 NOV 0 12002 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> 31 October 2002 <br /> Mr. Richard Brandes <br /> ST Services <br /> 2801 Waterfront Road <br /> Martinez, CA 94553 <br /> REVIEW OF ADDITIONAL SITE ASSESSMENT REPORT, ST SERVICES <br /> TERMINAL #29, STOCKTON, SAN JOAQUIN COUNTY <br /> We have reviewed the 28 October 2002 Additional Site Assessment Report(Report) submitted by <br /> SECOR International Incorporated on behalf of ST Services for the ST Services Port of Stockton <br /> Terminal#29 in Stockton. The Report discusses the soil and groundwater sampling results from <br /> nine Geoprobe borings and three hand-augered borings around aboveground storage tanks (AST) <br /> #3301 and#3302 which contain gasoline and AST#1503 which contains diesel fuel. Boring <br /> ST/HA-2 shows an increase in gasoline constituents in soil with depth. Each of the 12 grab <br /> groundwater samples show pollution above applicable water quality objectives. The Report states <br /> that the lateral limits of pollution were not defined for each of the tanks and proposes to initiate <br /> interim remediation to recover separate phase hydrocarbons (SPH) observed around AST#3302. <br /> Regional Board staff concurs with initiating remedial action to remove SPH, but this should <br /> occur concurrently with delineation activities. However, Regional Board staff does not agree that <br /> the vertical extent of groundwater pollution is defined. By 20 December 2002, please submit a <br /> work plan to install monitoring wells to delineate the lateral and vertical extent of groundwater <br /> pollution and an interim measure to recover SPH. If you have any questions, you may contact me <br /> at(916) 255-3119 or by email at lewisd@rb5s.swrcb.ca.gov. <br /> DEVRA LEWIS <br /> Environmental Scientist <br /> cc: Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Port of Stockton, Office of Environmental and Regulatory Affairs, Stockton <br /> Mr. Rusty Benkosky, SECOR International Inc., Sacramento <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgcb5 <br />