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I <br /> 10 March 2003 <br /> • AGE-NC Protect No 02-0964 <br /> Page 3 of 4 <br /> 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> Three ground water samples were collected and submitted for laboratory analysis The analysis <br /> detected TPH-g and TPH-d in ground water sample MW-1 at concentrations of 18,000 micrograms <br /> per liter (µg/1) and 22 µg11, respectively In addition, BTEX compounds were detected in sample <br /> MW-1 at concentrations of 290 µg/l, 79 µg/1, 1,200 µg/1 and 3,600 µg/1, respectively <br /> No other target analytes were detected in the samples analyzed Analytical results of the monitoring <br /> well ground water samples are summarized in Tables 2 and 3 The laboratory reports (CTEL I D <br /> 0301-115-1 to -3), quality assurance and quality control and chain-of-custody forms are presented <br /> in Appendix B <br /> 4.0. CONCLUSIONS <br /> The findings from the October 2002 ground water monitoring event are as follows <br /> I • Ground water flow direction at the water table was towards the east to northeast at a gradient <br /> 0 of 0 008 ft/ft The ground water elevation at the site has decreased 0 23 foot over the quarter <br /> • The ground water elevation appeared to be within the screen intervals of wells and should <br /> yielded samples fully representative of shallow ground water conditions <br /> • TPH-g and TPH-d were detected in ground water sample from well MW-1 at concentrations <br /> I as high as 18,000 µg/1 TPH-g BTEX compounds benzene (290 µg11), ethylbenzene(1,200 <br /> µg/1) and xylenes (3,600 µg/1)were significantly above the DHS's Maximum Contaminant <br /> Levels established for these compounds in drinking water <br /> I • The vertical and lateral extent of TPH and most VOCs have not been defined <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of this investigation, AGE recommends continue quarterly ground water <br /> monitoring, the next monitoring event is scheduled for April 2003 <br /> IThe AGE-prepared Additional Site Assessment Work Plan, dated 25 October 2002, was approved <br /> by the EHD by letter dated 03 December 2002 AGE expects to complete the work by the end of first <br /> quarter 2003 <br /> • <br /> I <br />