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SECOR 2.0 FIRST QUARTER 2006 COMPLETED WORK SUMMARY 2.1 STTC • SECOR conducted quarterly groundwater monitoring and sampling on and adjacent to the Stockton terminals in accordance with MRP No. R5-2004-0823, which is summarized in Table 1 and provided in Appendix A. SECOR gauged site wells on February 6, 2006 and collected groundwater samples from site wells on February 6 through February 9, 2006 following the protocols described in Appendix D. Several wells were inaccessible during this sampling effort due to the presence of standing water. The wells that were not gauged and/or sampled because they were under water include AR/MW-3A, AR/MW-5A, AR/MW-513, AR/MW-5C, AR/MW-613, AR/MW-8A, AR/MW-8B, AR/MW-8C, AR/MW-13A, AR/MW-13C, AR/MW-22A, AR/MW-23A, AR/MW-24A, TO/MW-1, TO/R-2, TO/R-5. Well OW-4A was not gauged or sampled because the monument was damaged. During gauging activities on February 6, 2006, visible sheen was reported in wells TS-4 and AR/MW-11A. However, the wells were subsequently sampled on February 7, 2006. • On March 8, 2006, SECOR supervised a subcontractor, Cornerstone Environmental Contractors, repair the well casing and monument for monitoring well OWAA. • 2.2 Additional Work Performed on STTC Sites BP Terminal: Outside of routine groundwater monitoring and sampling activities conducted at the site, no work was performed by SECOR on the BP Terminal during the first quarter 2006. Tesoro Terminal: Outside of routine groundwater monitoring and sampling activities conducted at the site, no work was performed by SECOR on the Tesoro Terminal during the first quarter 2006. Time Oil Terminal: • Outside of routine groundwater monitoring and sampling activities conducted at the site, no other work was performed by SECOR at the Time Oil Terminal during the first quarter 2006. • STTC 1Q06 Final Report 3 May 1, 2006 770T.43673.12.0002