Laserfiche WebLink
I 4 <br /> �. 29 August 2001 , <br /> AGE-NC Project No 96-0235 <br /> y Page 4 of 5 <br /> 1 , <br /> the ground water contamination plumes in upper and lower ground water Intervals The laboratory <br />' report (MAY Lab IDs 68667`through 68686), chain-of-custody forms and the laboratory QA/QC <br /> report are Included in Appendix C <br /> 1 <br />'= <br /> 4.0. SUMMARY AND CONCLUSIONS <br />' Based on the data collected from the former UST No 3 area, AGE finds <br />' • Ground water flow within the lower monitored Interval appears to have been toward the <br /> south-southwest, ground water flow in the upper Interval was flowing radially toward the <br /> south Ground water flow in the upper screened interval during the previous quarterly was <br />' toward the east-northeast I I I <br /> • TPH-g,TPH-d and BTEX compounds were detected iii ground water samples collected from <br />' MW-1, MW-2 and EW-2 1,2-DCA was detected in ground water samples collected from <br /> wells MW-1,MW-2,MW-5,MW-6A,MW-6B,MW-7 and EW-2 The petroleum-impacted <br /> ground water plume has remained relatively stable <br />' + MTBE was not detected in any of the ground water samples collected from the former UST <br /> No 3 excavation area I J , <br />' The lateral extent of the plume of impacted ground water is not well defined to the south <br /> , <br />' Based on the data collected from the former UST cluster area, AGE finds _ <br /> • TPH-g was detected in samples collected from MW-9, MWA0, MW-11B and EW-1 at' <br />' concentrations as high as 38,000 gg/l TPH-d was' detected'm samples collected`from <br /> MW-10,MW-11B,MW-13B and EW-11 at concentrations as high as 11,000µg/1 TPH-d had <br /> been detected as high as 60,000 µg/l during the previous quarter <br />' • BTEX compounds were detected in samples collected from MW-9, MW-10, MW-11A, <br /> MW-11B, MW-12B, MW-13B and EW=1 Benzene was detected at concentrations as high <br /> as 1;200 µg11 Concentrations of BTEX compounds in ground water samples collected from <br />' the former UST cluster have remained relatively stable during the past four quarters <br /> • MTBE was detected in the lower screened wells MW-9,MW-11B,MW-12B and MW-13B <br />' and in shallow wells MW-10, MW-13A and EW-1 at concentrations as high as 280 gg/l <br /> • The most impacted groundwater appears to be centered around EW-1 and MW-10, deeper <br /> ground water Is less intensely Impacted The lateral extent of the contamination plume in <br />' ground water is not well defined toward the east and south area of the former UST cluster <br /> 1 S Advanced GeoEnvironmental,Inc <br /> I ; 1 <br /> f <br /> 1 1 <br />