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31 August 2005 .1 AGE-NC Project No 96-0232 Page 11 of 30 µg/1, from P42 as high as 240 µg/l and from P43 as high as 540 µg11, TPH-d and TPH-mo were detected in grab water samples from P43 at concentrations as high as 97 µg/1 and 380 µg/l, respectively A report of findings (Site Assessment Report - August 2004, dated 10 August 2004) documenting well installation activities performed In November 2004 was prepared by AGE and submitted to the SJCEHD and the RWQCB • May 2004 - One additional, dual-completed ground water monitoring wells (MW-19) was installed off-site towards the north on Banner Avenue (Figure 2), the uppermost screen interval (MW-19A)was installed at depths between 10 and 25 feet (First Water Zone), the lower screen interval (MW-19B) was Installed at depths between 45 and 50 feet (Second Zone) Well construction details and a boring log MW-19 are In Appendix F MTBE was detected In MW-19 soil samples collected at depths of 18 feet and 30 feet at concentrations of 0 22 mg/kg and 0 15 mg/kg, respectively, MTBE was detected from the Initial well development samples at MW-19A and MW-19B at concentrations of 5,300µg/I and 58 µg/l, respectively A report of findings (Sate Assessment Report-August 2004, dated 10 August 2004) documenting well Installation activities performed In November 2004 was prepared by AGE and submitted to the SJCEHD and the RWQCB • November 2004-One additional,dual-completed ground water monitoring wells(MW-20) .� was installed off-site towards the north at the McDonald's Restaurant property, 6440 West Banner Avenue(Figure 2),the uppermost screen Interval(MW-20A)was Installed at depths between 10 and 25 feet (First Water Zone), the lower screen Interval (MW-20B) was Installed at depths between 45 and 50 feet (Second Zone) Well construction details and a boring log MW-20 are In Appendix F Petroleum hydrocarbons were not detected In any of the analyzed soil samples, however, MTBE was detected from MW-20A and MW-20B at concentrations of 180 µg/1 and 4 5 µg11, respectively, during the 4`h quarter 2004 ground water monitoring event A report of findings (Ground Water Monitoring Well Installation Report, dated 28 January 2005) documenting well Installation activities performed In November 2004 was prepared by AGE and submitted to the SJCEHD and the RWQCB 2 4 GROUND WATER MONITORING PROGRAM Between July 1996 and June 2005,AGE performed forty-two ground water monitoring events at the site to monitor dissolved petroleum hydrocarbon concentrations In ground water and to characterize ground water flow direction and gradient Additionally, five ground water monitoring events were previously recorded by Del-Tech Geotechnical Support Services at the site between May 1991 and October 1993 Advanced GcoEnwronmental,Inc