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' 29 May 2000 • AGE-NC Project No 99-0592 ' Page 3 of 4 - ' water data was not collected from the adjacent site during this event and a flow direction could not be determined for February 2000 Ground water elevation data are presented on Table 3 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES ' Petroleum hydrocarbons were detected in the ground water sample collected from monitoring well MW-1, located within the former UST excavation TPH-g was detected at a concentration of 780 micrograms per liter (µg11) Benzene, toluene, ethylbenzene, and xylenes were detected at ' concentrations of 1 2 µg/l, 1 2 µg/1, 10 µg11, and 0 75 µg11, respectively MTBE and TBA were detected in monitoring well MW-1 at concentrations of 19µg/1 and 13 µg11,respectively No analytes were detected in sample DW-1 collected from domestic well #1 ' Analytical results of the ground water samples for the February 2000 monitoring event are Yt gr p �' g ' summarized on Tables 1 and 2 The laboratory report (MAI Laboratory ID 31206 and 31207), QA/QC and chain-of-custody are included in Appendix B 4.0. SUMMARY/CONCLUSIONS The following conclusions were drawn from the results of the site investigation and data collected from adjacent sites • Ground water elevation at the site increased approximately 2 56 feet since the 15 November 1999 monitoring event • The inferred local ground water flow direction is toward the northeast Additional monitoring Iwells located at an adjacent site (3535 East Cherokee Road - Cherokee Truck-Stop) have been utilized to construct a ground water flow direction map for the subject site from the last monitoring event + TPH-g was detected in the ground water sample from monitoring well MW-1 at a concentration of 780 µg/1 TPH-g concentrations have decreased since the last monitoring event • MTBE was detected at a concentration of 19 µg/1 in ground water sample MW-1-02/15/00 analyzed by EPA Method 8020 and at 16 µg11 by EPA Method 8260M MTBE concentrations have significantly decreased since the last monitoring event • TBA was detected at a concentration of 13 µg11 in sample MW-1-02115/00 analyzed by EPA Method 8260M TBA concentrations have increased since the last monitoring event • BTEX compounds were detected in the water sample collected from MW-1 at concentrations Advanced GeoEnvironmental,Inc