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04 March 2002 <br /> AGE-NC Project No 95-0111 <br /> Page 3 of 4 <br /> 3 2 MICROBIOLOGICAL ACTIVITY IN GROUND WATER <br />' The laboratory results of water samples collected In September 2001 indicated low to moderate <br /> populations of orgamsms capable of gasoline and diesel metabolism However, nutrient <br />' concentrations were at moderate to high levels for ongoing bioremediation Microbiological and <br /> physicochemical analytical results are summarized on Table 4 The laboratory report and chain-of- <br /> custodyform were Included in Appendix B of the AGE-prepared Ground WaterMonitorzngReport- <br />' Third Quarter 2001, dated November 29 2001 <br />' 3 3 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> L <br /> TPH-d and BTEX compounds were not detected at or above laboratory reporting limits In the ground <br /> water samples TPH-g was detected In the ground water samples collected from wells MW-1 and <br /> MW-4 at concentrations of 240 µg11 and 500 }Ig/l, respectively <br /> MTBE was detected by EPA Method 8020 in the sample collected from MW-1 at a concentration <br /> of 66 µg/l MTBE was confirmed in the same ground water sample at a concentration of 79µg11 by <br /> EPA method 8260 No other fuel additives were detected at or above laboratory reporting limits In <br /> the ground water samples analyzed <br />' No analytes were detected at or above laboratory reporting limits In the ground water sample <br /> collected from the Domestic well located at 2450 Toste Road (DW2450) <br />' Analytical results of the ground water samples are summarized In Tables 2 and 3 The laboratory <br /> reports (CTEL Laboratory I D No 0112-106-1 through 0112-106-8 and MAI Laboratory I D <br /> No 88966),quality assurance and quality control report and chain-of-custody forms are Included In <br /> 1 Appendix B <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based on the findings from this Investigation, AGE concludes <br /> • The northerly ground water flow direction inferred from data collected during this <br />' monitoring event Is consistent with ground water flow directions determmed during past <br /> monitoring events at the site <br /> • TPH-g was detected In the ground water samples collected from wells MW-1 and MW-4 at <br />' concentrations of 240 µg11 and 500 gg/l, respectively TPH-d was not detected at or above <br />' Advanced GeoEnvironmental Inc; <br /> 1 <br />