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California Vional Water Quality Cont I Board <br /> l\- Central Valley Region 71 <br /> v Karl E. Longley, ScD, P.E.,Chair. U <br /> f l r4�'rnmr� <br /> Linda S.Adams Sacramento Main Officev��V Arnold <br /> Secretary for 11020 Sun Center Drive#2O0,Rancho Cordova,California 95670-6114 Schwarzenegger <br /> E,wronmemal Protection Phone(916)464-3291 •FAX(916)4644645 APR — 7 2008 Governor <br /> hap://wwwwaterbouds.ca.gov/centralvalley <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> 3 April 2008 <br /> Mr. Gregory Torlai, Jr. <br /> President, Bustez Enterprises, Inc. <br /> 5851 Wolfinger Road <br /> Stockton, CA 95206 <br /> ADDITIONAL ASSESSMENT WORK PLAN, H & H MARINA, 15135 EIGHT MILE ROAD, <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> Staff of the Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) reviewed the 22 February 2008 Additional Site Assessment Work Plan (Work Plan) <br /> submitted by Advanced GeoEnvironmental, Inc. (AGE) on behalf of the H & H Marina located <br /> at 15135 Eight Mile Road in Stockton (Site). Due to a 2007 purchase, the Site is currently <br /> owned by Bustez Enterprises, Inc. (Bustez) of Stockton, California. <br /> The purpose of the Work Plan is to assess the lateral and vertical extent of a fuel hydrocarbon <br /> plume discovered during the 1991 removal of three underground storage tanks (USTs) from <br /> the northwestern portion of the Site. The plume was exacerbated by a September 2007 spill <br /> from the aboveground storage tanks (AGTs) located in the center of the Site, in the vicinity of <br /> monitoring well MW-2. <br /> The Work Plan proposes to advance seven borings (B-18 to B-24) to about 60 feet below <br /> ground surface (bgs) to delineate the northeast, southwest and vertical extents of the <br /> commingled plume. Two grab groundwater samples will be collected from each boring at first <br /> encountered groundwater, anticipated to be about five to 10 feet bgs, and at 50 to 60 feet bgs <br /> using direct-push technology. Soil sample collection is proposed from B-24 to assess the <br /> vertical extent of hydrocarbon-impacted soil associated with the October 2007 spill. Soil <br /> samples will be collected between five feet bgs and the total boring depth at 5-foot intervals. <br /> The Work Plan also proposes to enhance the current groundwater pump and treat system by <br /> adding two extraction points to the existing groundwater extraction system to remediate the <br /> plume created by the September 2007 gasoline release. Groundwater would be pumped from <br /> the existing 2-inch diameter monitoring well MW-2 and from a shored, partially backfilled sump <br /> that has been left open since contaminated soil was excavated during the spill cleanup. <br /> According to the 29 January 2008 Above Ground Tank Theft, Spill and Clean-up Update — <br /> Fourth Quarter 2007 (Update), about 4,500 gallons of polluted groundwater have been <br /> pumped from the sump since October 2007. <br /> Operation of the interim groundwater treatment system commenced in June 2005 under <br /> general National Pollutant Discharge Elimination System (NPDES) Permit No. CAG915001, <br /> California Fitvironmental Protection Agency <br /> C11 Recycled Paper <br />