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Californiq#egional Water Quality C(strol Board <br /> Central Valley Region ��°� h�s`1 <br /> Katherine Hart, Chair ° <br /> 11020 Sun Center Drive,#200, Rancho Cordova, California 95670-6114 <br /> Linda S.Adams (916)464-3291 • FAX(916)464-4645 Edmund G.Brown Jr. <br /> Acting Secretary for http://www.waterboards.ca^gov/centralvalley Governor <br /> Environmental Protection I CEI"EL { <br /> a a Y VV <br /> li .y �, 2011 <br /> 21 July 2011 <br /> 4�vi.gnsiadF1,-AL HEALTH <br /> ;e�=�;vi; SERVICES <br /> Mr. Robert Brod <br /> John Deere Landscapes <br /> One John Deere Place <br /> Moline, IL 61265 <br /> CONDITIONAL CONCURRENCE WITH SOIL REMOVAL WORK PLAN, FORMER <br /> LESCO, 2829 W. WASHINGTON BLVD., SAN JOAQUIN COUNTY <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley <br /> Water Board) staff reviewed the July 2011 Corrective Action Workplan (Soil Workplan) <br /> prepared by John Deere's consultant, ERM. John Deere Landscapes purchased the <br /> former Lesco fertilizer handling facility in the Port of Stockton, consisting of a 3.5- acre <br /> parcel used for bulk product handling and a 1.5- acre parcel used for warehousing and <br /> offices. In March 2011 , John Deere removed a shed and tank pad on the 3.5-acre parcel <br /> and completed a soil investigation. The Soil Workplan presents the results of the March <br /> 2011 soil investigation, soil data from 2005 through 2011, and a proposal to remove soil <br /> containing nitrate and ammonium above the cleanup levels. <br /> SOIL WORKPLAN <br /> The data in the Soil Workplan characterizes the distribution of ammonium and nitrate in <br /> soil. The Soil Workplan proposes to remove soil containing nitrogen exceeding <br /> 100 mg/kg. The excavated soil will either be disposed of at an appropriately licensed <br /> landfill or alternatively provided to an agricultural field for its nutrient value. Soil <br /> excavation will occur from depths ranging from 1 to 7.5 feet below ground surface on the <br /> 3.5- acre parcel. <br /> The soil data show that sulfate is present in some soil samples. Much of the sulfate <br /> found in soil will be removed in association with the nitrogen. Pesticides and herbicides <br /> are not constituents of concern, based on soil sample results obtained in 2005 and in <br /> 2006. Historical soil sampling results do not reveal pollutants at concentrations of <br /> concern on the 1.5- acre parcel. <br /> Groundwater remediation will be considered after the Site Completion Report has been <br /> prepared. <br /> California Environmental Protection Agency <br /> QlRecycled Paper <br />