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f � . <br />Linda S. Adams <br />Secrelaryfor <br />Environmental <br />. Protection <br />7 May 2009 <br />Mr. Eric Jenks <br />t.amornia xegional Water (duality <br />. Central Valley Region <br />Karl E. Longley, SCD, P.E., Chair <br />Wilbur -Ellis Company <br />P.O. Box 1030 <br />Marysville, CA 95901 <br />Control Board <br />0 <br />11020 Sun Center Drive #200, Rancho Cordova, California 95670-6114 <br />Phone (916) 464-3291 • FAX (916) 464-4645 <br />http://www.waterboards.ca.gov/centralvalley <br />U9IEGIS'tgED <br />MAY 1 1 2009 <br />ENVIRONMENT HEALTH <br />PERMIT/SERViCES <br />Arnold <br />Schwarzenegger <br />Governor <br />REVIEW OF THE 2008 ANNUAL REPORT AND RESULTS OF THIRD QUARTER 2008 <br />SEMI-ANNUAL GROUNDWATER MONITORING REPORT, AND <br />REQUIREMENTS FOR NO FURTHER ACTION FOR SOIL, JOHN TAYLOR FERTILIZERS <br />CO. STOCKTON, SAN JOAQUIN COUNTY <br />Staff of the California Regional Water Quality Control Board, Central Valley Region (Central <br />Valley Regional Water Board) has reviewed the 2008 Annual Report and Results of Third <br />Quarter 2008 Semi -Annual Groundwater Monitoring Report (Report) for the subject site, <br />located at 1819 South Argonaut Street in Stockton, San Joaquin County, California. The <br />Report was prepared on your behalf by Geosyntec consultants. <br />The Report provides results from the two semi annual groundwater monitoring and sampling <br />events that were conducted at the site during the year 2008. <br />Central Valley Regional Water Board comments on the Report are provided below <br />Elevated concentrations of total. oxidizable nitrogen (TON) were observed in <br />groundwater monitoring well MW -6 at 270 mg/L and 380 mg/L for the original and <br />duplicate samples, respectively. These concentrations were highest since the <br />monitoring began in upgradient monitoring well MW -6 in July 2005. Based on these <br />elevated levels, continuing monitoring of groundwater for total TON is needed. <br />Historical time series plots had shown declining trends of TON, thus, in the future <br />monitoring reports, JTF needs to submit a time series plot of TON concentrations <br />showing trends in all seven monitoring wells across the site. <br />2. Elevated levels of 1,2,3-trichloropropane (1,2,3 -TCP) have been detected in the <br />groundwater beneath the site. During 2008, maximum concentration of 1,2,3 -TCP was <br />detected at 6.9 pg/L in monitoring well MW -4, which is located downgradient of Shop <br />Number 2 and Shop Number 3. Concentrations of 1,2,3 -TCP have been fluctuating <br />between 6.9 pg/L and 0.15 pg/L in MW -4 since the July 2005 monitoring and sampling <br />event. These concentrations are above water quality objectives. Soil investigation <br />conducted in 1999 and 2005 did not reveal a significant source area for 1,2,3 -TCP and <br />as of today a source area for 1,2,3 -TCP has not been identified. Soil closure was <br />verbally recommended by JTF during a meeting on 28 October 2008, and again during. <br />California Environmental Protection Agency <br />� i Recycled Paper <br />