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( e <br /> ' 31 October 2001 <br /> • AGE-NC Project No 95-0144 <br /> Page 4 of 4 <br /> • Petroleum hydrocarbons were detected in five of the ten wells sampled during the August <br /> 2001 monitoring event Concentrations of TPH-g have decreased in monitoring wells <br /> MW--21A and MW-21B since the May 2001 monitoring event Concentrations of TPH-d <br /> ' have increased in monitoring wells MW-20A,MW-21 A and MW-21 B and slightly decreased <br /> in monitoring well MW-19A since the last quarterly monitoring event TPH-mo has <br /> decreased in monitoring well MW-21A and was at the reporting limit in MW-21B <br /> 1 TPH-g was detected in wells MW-21A and MW-21B located within the former UST No 8 <br /> pit and in MW-13 located north of the former UST No 8 pit The plume of groundwater <br /> ' impacted by TPH-d is larger than the TPH-g plume, extending just south of MW-19 and <br /> north of MW-13 <br /> • Low concentrations of MTBE were detected in ground water samples collected from <br /> monitoring wells MW-19A, MW-21A and MW-21B located near the former UST No 8 pit <br /> Based on its sporadic detections and low concentrations, the impact of MTBE on the site is <br /> Ibelieved to be minima) <br /> lie 5.0. RECOMMENDATIONS <br /> Based upon data obtained during the third quarter of 2001 and previous sampling events, AGE <br /> ' recommends <br /> ' • Continued quarterly monitoring of the site The next quarterly monitoring event should be <br /> scheduled for November 2001, concurrent with monitoring at the Van Buren site r <br /> • Preparation of a work plan for a ground water pump and treat system to be utilized at the <br /> ' former UST No 8 location <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 mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> ' conditions at the site have been made from a limited number of available data points (i a ground <br /> water monitoring wells, ground water samples) and subsurface conditions may vary through time <br /> and with distance from these data points No other warranty, expressed or implied, is made as to the <br /> ' professional recommendations contained in this report <br /> Advanced Geoi:nvironmentsl,Inc <br /> I <br />