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Stantec <br /> Third Quarter 2010 Status Summary Report <br /> Former Tosco Bulk Terminal No. 10013 <br /> October 26, 2010 <br /> Lab qualifiers (to determine impact on sample results) <br /> Based on the QA/QC evaluation of above parameters, no systematic problems were <br /> detected and the overall data objectives were met. All samples were analyzed within the <br /> method-specific holding time criteria. <br /> The data reviewed are of acceptable precision and accuracy for project purposes. <br /> QUARTERLY REMEDIAL ACTIVITIES <br /> Between June 30, 2010 and September 30, 2010, Stantec performed seven bi-weekly oxygen <br /> injections. During oxygen injection events Stantec injected 300 cubic feet (26.7 pounds) of <br /> oxygen into wells IP-10, IP-11, IP-14, IP-15, IP-17 and IP-16 for a combined total of about 961 <br /> pounds. During the second quarter 2010 Stantec redeveloped MW-22C and removed silt from <br /> the well. Currently Stantec has not resumed oxygen injections into MW-22C. <br /> During the bi-weekly oxygen injection events, compressed oxygen cylinders containing 150 <br /> cubic feet (13.4 pounds) each are plumbed directly to the respective oxygen injection well head <br /> via a quick coupler. Oxygen from the compressed cylinders is administered to the well at a <br /> constant pressure of 30 pounds per square inch (PSI) for duration of a half hour. Oxygen <br /> pressure is kept constant via a regulator attached to the compressed oxygen cylinder. The <br /> respective injection well is then pressurized and oxygen is forced out the screen into the <br /> permeable water bearing zone; for example oxygen injection wells IP-14 and IP-16 are <br /> screened 20 to 30 feet bgs across permeable sands within the base of A-zone (10-25 feet bgs). <br /> Well construction details are presented in Table 2. An oxygen injection summary is included in <br /> Table 5 and oxygen injection field notes are included in Appendix E. <br /> Dissolved oxygen (DO) readings were taken from surrounding wells pre and post injection. Bi- <br /> weekly oxygen injections were successful in raising DO in some surrounding wells. A DO <br /> summary is included in Table 6. <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/REGULATORY MEETING <br /> o Stantec, Second Quarter 2010 Status Summary Report, dated April 29, 2010. <br /> o Stantec, Remedial Action Plan, dated April 30, 2010. <br /> o Stantec received (Response to Remedial Action Plan) letter from RWQCB-CVR, <br /> dated June 14, 2010. <br /> 6 <br />