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Stantec <br /> First Quarter 2011 Status Summary Report <br /> Former Tosco Bulk Terminal No. 10013 <br /> April 29, 2011 <br /> The data reviewed are of acceptable precision and accuracy for project purposes. <br /> QUARTERLY REMEDIAL ACTIVITIES <br /> Between December 17, 2007 and December 28, 2010, Stantec performed bi-weekly oxygen <br /> injections. During oxygen injection events Stantec injected 300 cubic feet (26.8 pounds) of <br /> oxygen into wells IP-10, IP-11, IP-14, IP-15, IP-16, IP-17 and MW-22 for a combined historic <br /> total of about 9,105 pounds. <br /> Oxygen injection activities were halted in December 2010. <br /> REFERENCES <br /> California Regional Water Quality Control Board: 2004. Monitoring and Reporting Program <br /> No. R5-2004-0824, Former BP Terminal #10013, Stockton, San Joaquin County. <br /> Prepared for ConocoPhillips. May 6. <br /> RECENT SUBMITTALS/CORRESPONDENCE <br /> Stantec, Work Plan for Human Health Risk Assessment (HHRA), dated December 22, <br /> 2010. <br /> RWQCB-CVR, Response letter Work Plan for Human Health Risk Assessment (HHRH), <br /> Former Tosco Bulk Terminal #10013, 3505 Navy Drive, Stockton, San Joaquin County, <br /> dated January 18, 2011. <br /> Stantec, Fourth Quarter and Annual 2010 Status Summary Report, dated January 28, <br /> 2011. <br /> Stantec, Addendum Work Plan for Human Health Risk Assessment (HHRH), dated <br /> February 14, 2011. <br /> RWQCB-CVR, Response letter Fourth Quarter and Annual 20010 Status Summary <br /> Report, Former Tosco Bulk Terminal #10013, 3505 Navy Drive, Stockton, San Joaquin <br /> County, dated March 8, 2011. <br /> PLANNED SECOND QUARTER 2011 SITE ACTIVITIES: <br /> Proposed activities to be completed during the second quarter 2011 include: <br /> • Conduct second quarter groundwater monitoring and sampling activities. <br /> 6 <br />