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18 April 2001 " <br /> AGE-NC Project No 00-0769 <br /> Page 4of5 <br /> MW i1, MW-2A, MW-213 and MW-3B at concentrations of 2,700 µg/l, 19 µg/l, 260 µg/l and <br /> 3 9 µg/l, respectively <br /> Analytical results of ground water samples are summarized on Tables 2 and 3 The laboratory report <br /> (MAI Laboratory ID 56921 - 56925) and chaui-of-custody forms are includ6d in AppendixB <br /> - E <br />' 5.0. ' SUMMARY AND CONCLUSIONS t <br /> Based upon data collected from the site the December 2000 monitoring event, AGE concludes the <br /> following <br /> • The average depth to gr6uhd water in the three shallow screened wells was approximately <br /> 24 5 feet bsg The ground water gradient was calculated to be 0 0004 ft/ft with a flow <br /> direction toward the northeast <br /> • TPH-g and BTEX compounds were detected m each of the ground water samples collected <br /> and analyzed The highest concentrations of TPH-g and benzene were detected in the sample <br /> collected from MW-1 at concentrations of 190,000 µg/1 and 33,000 µg/l, respectively <br />� .' o Fuel oxygenates and EDB were not dected above laboratory reporting limits In any of the <br /> analyzed ground water samples <br /> o 1,2-DCA was detected in samples analyzed from five of the six ground water monitoring <br /> wells Concentrations ranged from. 19 µg/1 to 2,700 µg/1 <br /> O 'At this time, neither the vertical nor lateral extent of contamination to soil and ground water <br /> r has been defined <br /> F <br /> IBased upon'data collected during the March 2001 monitoring event,AGE.concludes the following <br /> ,The average depth to ground water in the three shallow screened wells was approximately <br />' 23 8 feet bsg The ground water gradient was calculated to be 0 001 ft/ft with a flow direction <br /> toward the southwest <br /> 6.0. - RECOMMENDATIONS <br />'' J <br /> Based upon data collected from the site, AGE recommends <br /> IAdditional site assessment to evaluate the vertical and lateral extent of petroleum <br /> �• hydrocarbon impact to soil and ground water related to the-former gasoline USTs It is <br /> recommended that the'additional'site assessment' activities consist of the advancement <br /> 1 , <br /> Advanced GeoEnvironmenta4Inc <br /> A , <br /> v <br />