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DIK Enterprises Inc. -4- June 27, 2011 <br /> Claim No. 12992 <br /> a California Department of Public Health Notification Level/Response Level <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: 250 cubic yards of contaminated soil was removed in <br /> October 1998. <br /> B. In-Situ Soil/ Groundwater Remediation: <br /> • METHOD: soil vapor extraction and air sparging <br /> • DURATION: December 2009 through present <br /> • MASS OF TPH-G REMOVED: 71,919 pounds (March 2011) <br /> • RATE OF TPH-G REMOVAL: 30 pounds per day (March 2011) <br /> D. Groundwater Trends: Benzene trends are shown below, source area, near and <br /> far down gradient, respectively <br /> BENZENE Results for MW3 <br /> 10000 <br /> 9000 <br /> 8000 <br /> ]000 <br /> 6000. .__..._-_ <br /> 5000 - <br /> m 4000 <br /> K <br /> 3000 -, .. <br /> 2000 <br /> 1000 __.L I _-.. _ ,�s <br /> 'i Ile 1118 010 40 ,sem <br /> w BENZENE <br /> BENZENE Results for MW8A <br /> 2,500- <br /> 2000- <br /> o <br /> 5002000 <br /> 1500 <br /> m 1000 <br /> l <br /> 500 <br /> 0- <br /> Pe <br /> BENZENE si+. Trentl <br /> California Environmental Protection Agency <br /> Qd Recycled Paper <br />