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1 <br /> Ile 30 September 2005 <br /> AGE-NC Project No 97-0333 <br /> Page 5 of 6 <br /> 0 01-foot relative to National Geodlc Survey Datum No C 464 (NAVD88) Additionally, BP <br />' utilized global positioning system (GPS) techniques to Identify latitude and longitude for tracking <br /> wells MW-13 through MW-15 on the State Water Resources Control Board(SWRCB)GeoTracker <br />' database system The results of the monitoring well survey are contained in Table 1, the surveying <br /> report (BP Job No 9797) Is presented in Appendix E <br /> 3.0. SUMMARY AND CONCLUSIONS <br /> The results of the MW-13 through MW-15 multi-level well installations are as follows <br /> • AGE installed, developed and surveyed seven multi-level wells(MW-13 through MW-15), <br /> six of the seven CMT chambers were utilized to Install screen intervals at depths between <br /> 14 and 25 feet bsg (Hydrologic Unit 1), 39 and 45 feet bsg (Hydrologic Unit 2), 69 and 75 <br /> feet bsg(Hydrologic Unit 3),94 and 100 feet bsg (Hydrologic Unit 4), 119 and 125 feet bsg <br /> (Hydrologic Unit 5) and between 144 and 150 feet bsg (Hydrologic Unit 6) <br /> • No soil samples were collected during the above referenced multi-level well installations due <br /> . to previous soil and ground water investigation already performed at adjacent CPT borings <br /> P-10, P-13 and Flag City ground water monitoring well MW-12 <br /> • Analytical results of stockpiled soil were non detect for all constituents of concern,therefore, <br /> Ithe stockpiled soil(approximately 5 cubic yards)was spread along the southwest section of <br /> the site <br /> • A total of 2,450 gallons of displaced water generated from drilling activities was disposed <br /> of by American Valley Waste Oil, the displaced water was hauled off-site to Cascade <br /> General Inc , a non-hazardous waste facility in Portland, Oregon A manifest record is <br /> included with Appendix F <br /> 4.0. RECOMMENDATIONS <br /> • With the addition of multi-level wells MW-13 through MW-15, AGE recommends <br /> continued quarterly ground water monitoring at the site from wells MW-1 through MW-15 <br /> • Preparation of a conceptual site model (CSM), the CSM will serve as a guide to determine <br /> if future assessment and future remediation are necessary <br /> A quarterly ground water event was performed at the site from wells MW-1 through MW-15 on 26 <br /> • and 27 September 2005, results of the quarterly ground water monitoring event is forthcoming in <br /> Advanced GcoEnvironmental,Inc <br /> I <br />