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a <br />' 22 August 2000 <br /> . AGE-NC Project No 99-0592 <br /> Page 3 of 4 <br /> 1 _ <br /> 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES , <br />' Petroleum hydrocarbons were detected in the ground water sample collected from monitoring well <br /> MW-1, located within the former UST excavation TPH-g was detected at a concentration of <br />' 600 micrograms per liter (µ.g/l) Benzene, toluene and xylenes were detected at concentrations of <br /> 3 8 µg/l, 0 98 µg/l and 0 55 µg/l, respectively MTBE and TBA were detected in monitoring well <br /> MW-1 at concentrations of 13 µg/1 and 10 µg/l, respectively No analytes were detected In sample <br />' DW-1 collected from domestic well #1 <br /> Analytical results of the ground water samples for the June 2000 monutonng event are summanzed <br />' on Tables 2 and 3 The laboratory report(MAI Laboratory ID 40396 and 40397), QA/QC and chain- <br /> of-custody are included in Appendix B <br /> 1 , <br /> 4.0. SUMMARY/CONCLUSIONS <br />' The following conclusions were drawn from the results of the site investigation and data collected <br /> from adjacent sites <br /> lie Ground water elevation at the site decreased approximately 2 22 feet since the 15 February <br /> 2000 monitoring event <br />' The inferred local ground water flow direction is toward the northwest Additional <br /> monitoring wells located at an adjacent site (3535 East Cherokee Road - Cherokee Truck <br />' Stop) were utilized to construct a ground water flow direction map for the subject site <br /> • TPH-g was detected in the ground water sample from monitoring well MW-1 at a <br /> concentration of 600 gg/l TPH-g concentrations have decreased since the last monitoring <br /> I event <br /> • MTBE was detected at a concentration of 13 µg/1 in ground water sample MW-1-06/14/00 <br /> analyzed by EPA Method 8020 and at 13 µg/1 by EPA Method 8260M MTBE <br /> concentrations have decreased slightly since the last monitoring event <br /> • TBA was detected at a concentration of 10µg11 in sample MW-1-06/14100 analyzed by EPA <br /> Method 8260M TBA concentrations have decreased since the last monrtonng event <br /> • BTEX compounds were detected in the water sample collected from MW-1 at concentrations <br /> as high as 3 8'µg/1 BTEX compound concentrations have decreased, with the exception of <br /> benzene since the last monitoring event l <br /> • None of the target analytes were detected in the ground water sample collected from <br /> domestic well DW-1 <br /> 0 <br />' Advanced GeoEnvironmental,Inc <br />