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California&gional Water Quality COW <br /> Board <br /> Central Valley Region ! <br /> Katherine Hart, Chair a1 <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.govlcentralvalley c o <br /> Environmental Protection RECEIV"" r <br /> -'A 06 2011 <br /> 2 June 2011 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Robert Granberg <br /> City of Stockton <br /> Department of Municipal Utilities <br /> 2500 Navy Drive <br /> Stockton, CA 95206 <br /> CONCURRENCE OF EXCAVATION COMPLETION, 11751 WEST EIGHT MILE <br /> ROAD, STOCKTON, SAN JOAQUIN COUNTY <br /> On 21 June 2010, as part of the Delta Water Supply Project, two exploratory pits along <br /> the alignment of the pipeline utility easement were excavated. A debris disposal pile <br /> was discovered in and around the pipeline easement. The debris consisted of used <br /> tires, wood, plastic herbicide containers, and one car battery. San Joaquin County <br /> Environmental Health Department (EHD) was notified and responded to the site. On 24 <br /> June 2010, EHD referred oversight of the investigation and cleanup to Central Valley <br /> Regional Water Quality Control Board (Central Valley Water Board). <br /> On 15 July 2010, your consultant, Camp, Dresser, and McKee Inc. (CDM) submitted a <br /> work plan for soil/debris excavation and manag'e'ment, and soil/groundwater sampling <br /> for the above referenced property in San Joaquin County. Central Valley Water Board <br /> staff approved the work plan. <br /> On 23 July 2010, CDM began excavating the buried debris and impacted soil from the <br /> Delta Water Supply Project easement. Confirmation soil and groundwater samples <br /> were taken when the excavation activities were complete. <br /> On 16 August 2010, CDM submitted a report documenting the sample results. All <br /> groundwater samples contained no detectable concentration of total petroleum <br /> hydrocarbons (TPH), heavy metals, volatile organic compounds (VOCs), organochlorine <br /> pesticides, and PCBs. Soil samples contained no detectable concentrations of TPH, <br /> heavy metals, and VOCs. Pesticides (DDT and DDE) were detected at concentrations <br /> below USEPA's Regional Screening Levels (formerly Preliminary Remediation Goals, <br /> PRGs). <br /> California Environmental Protection Agency <br /> CIV Recycled Paper <br />