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y <br /> 17 July 2000 <br /> AGE-NC Project No 98-0511 <br /> Page 3 of 3 <br /> Laboratory Batch Number 99-0318-018 and Kiff Analytical Report Number 13626) and cham-of- <br /> custody forms are included In Appendix B <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes the following <br /> • The ground water gradient was calculated to be 0 004 ft/ft directed N 75' W <br /> • TPH-g and BTEX compounds were detected in MW-1 <br /> • Petroleum hydrocarbons were not detected in MW-2 through MW-4 <br /> • MTBE was detected at concentrations as high as 14 ppb in monitoring well MW-1, <br /> exceeding the State of California's action level of 13 ppb <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected from the site, AGE recommends <br /> • Additional soil and ground water investigation to further assess the TPH-g-impact and <br /> MTBE-Impact to soil and ground water <br /> • Continued ground water monitoring <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing In this or similar localities The findings were based upon field <br /> measurements and analytical results provided by an Independent laboratory Evaluations of the <br /> geologlc/hydrogeologlc conditions at the site for the purpose of this Investigation are made from a <br /> limited number of available data points (I e probe boring soil and ground water samples) and <br /> subsurface conditions may vary away from these data points No other warranty, expressed or <br /> Implied, Is made as to the professional recommendations contained In this report <br /> • <br /> Advanced GeoEnvironmenta[,Inc <br />