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• 31 August 2005 <br /> AGE-NC Project No 96-0232 <br /> Page 9 of 30 <br /> • July 2000 - Two additional six-inch diameter ground water extraction wells (EW-2 and <br /> EW-3) were installed on-site to depths of 35 feet and 50 bsg, respectively, to augment <br /> interim remediation measures(Figures 2 and 3), well construction details and a boring logs <br /> for EW-2 and EW-3 are in Appendix F, no soil or ground water samples were collected <br /> during installation of EW-2 and EW-3 Aquifer draw-down pump testing was performed at <br /> EW-2 (First Zone Water) to evaluate general ground water aquifer characteristics, from <br /> pump testing at EW-2,transmissivity values were calculated between 718 and 829 gal/day-ft, <br /> specific yield values were calculated between 0 034 and 0 21 and a radius of influence was <br /> generally projected at distances between 17 and 23 feet A report of findings (Quarterly <br /> Report- Third Quarter 2000, dated 15 October 2000) documenting investigation activities <br /> performed in July 2000 was prepared by AGE and submitted to the SJCEHD and the <br /> RWQCB <br /> • October 2000 - Seven additional six-inch diameter ground water extraction wells (EW-4 <br /> through EW-10) were installed on-site to depths of 35 feet bsg for upcoming remediation <br /> measures (Figures 2 and 3), well construction details and a boring logs for EW-4 through <br /> EW-10 are in Appendix F,no soil or ground water samples were collected during installation <br /> of EW-4 through EW-10 Following well completions,4-inch diameter,stainless steel model <br /> • 5S10 Grundfos Rediflow down-well pumps equipped with 230 volt Franklin 1-horsepower <br /> motors were Installed in ground water extraction wells EW-2, EW-4, EW-5, EW-6, EW-7, <br /> EW-8, EW-9 and EW-10 A manifold PVC piping system (2-inch) was plumbed <br /> underground to connect each extraction well to a ground water pump-and-treat (P&T) <br /> remediation area A report of findings (Quarterly Report -Fourth Quarter 2000, dated 15 <br /> January 2001)documenting Investigation activities performed in July 2000 was prepared by <br /> AGE and submitted to the SJCEHD and the RWQCB <br /> • November 2000-A ground water P&T system was Installed at the site that consisted of a 15 <br /> foot by 30 foot secondary containment area,four 2,000-pound media vessels(Sunsolve and <br /> virgin coconut shell activated carbon), one 1,000-gallon poly tank (holding tank), one <br /> process pump and one sediment filter chamber The treated water discharge pipe-line was <br /> constructed off-site from the southwest section of the Flag City Chevron site to a conveyance <br /> ditch (Coldam ditch) located approximately 450 feet south of the site <br /> Between 09 and 20 November 2000, AGE Initiated a ground water P&T start-up period to <br /> test the efficiency of the ground water pump and treat system and to verify treatment of <br /> petroleum-impacted water <br /> On 22 November,the above referenced ground water P&T system was in full operation and <br /> began extracting and discharging treated water to the Coldani conveyance ditch under <br /> RWQCB General Order 5-00-119 for discharge to surface waters of ground water from <br /> cleanup of petroleum fuel pollution,an RWQCB waste water discharge(NPDES permit no <br /> CAG915001)permit for discharge to the Coldam ditch was Issued to Flag City Chevron by <br /> Advanced GeoEnrnronmental,Inc <br />