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Elr•texo,G Bwowx JE <br /> .r n <br /> MUIwvi Reurwct <br /> rcrvc,now.ei..nrtc rwx <br /> Water Boards <br /> State Water Resources Control Board <br /> USTCF 5-YEAR REVIEW SUMMARY <br /> 4TH REVIEW—SEPTEMBER 2012 <br /> -Agency Information <br /> Agency Name: San Joaquin County Address: 600 East Main Street, <br /> Environmental Health Stockton, CA 95202 <br /> Department Coun <br /> -Agency Caseworker: Lisa Medina Case No.: 9031 <br /> Case Information <br /> USTCF Claim No.: 7881 Global ID: T0607700163 <br /> Site Name: Roek Construction Site Address: 102 South Wilson Way, <br /> Stockton, CA 95205 <br /> Responsible Party: Knowles Family Trust Address: 1811 Grand Canal Blvd., #2, <br /> Stockton, CA 95207 <br /> USTCF Expenditures to Date: $1,076,376 Number of Years Case Open: 24 <br /> Summary <br /> A leak was identified in June 1988. Soil vapor extraction was conducted from November 1997 <br /> through June 2002 and removed approximately 13,199 pounds of TPHg. Batch hydrogen <br /> peroxide injection events were conducted in November 2010, December 2010, March 2011, <br /> May 2011 and June 2011. Approximately 5,094 gallons of H2O2 was injected into the <br /> subsurface. According to data available in GeoTracker, there is 12 California Department of <br /> Public Health (CDPH) regulated Public Supply Wells within 1/2 mile of the site; nearest well is <br /> 844 feet south from the Site. Water users in the vicinity of the site rely on the California Water <br /> Service. Attachments 1 and 2 provide the technical data to support our recommendation. <br /> Recommendation <br /> Based on the available information, the Fund concurs with the Board that active remediation <br /> continues. <br /> Kirk Larson, P.G. Date Robert Trommer, C.H.G. Date <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> CHARLEs R. HORPIN, CHAIRMAN I T`ICAIA6 HOWARD, E%ECUTWE DIRECTOR <br /> IDDI ISNvet,Sa,amento,CA95814 I Wolin,,Atlarerm P.O.Snx 1011 Sanoemmn.CA!151110-01W WWW wmarM1oarzla.,n.<J0v <br /> NEC VCI Ee nAnEn <br />