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• - 3 - 14 September 2006 <br /> In Graphs 1 and 2 below, the TPHg results from MW-2 and MW-3 groundwater monitoring <br /> from 1994 to 1996 were compared to TPHg results from 2002 to 2006. Water quality data <br /> show increasing TPHg concentration trends in both monitoring wells. <br /> Graph 1 <br /> --- -- -- MW-2 TPHg <br /> 500 ----- - - ----- <br /> 400 -- -- <br /> 300 --- MW-2 TPHg <br /> 200 --- -- -- —Linear (MW-2 TPHg) <br /> 100 - <br /> 0 <br /> V LO O r- M O O N M Iq LO (O <br /> O O O O O O O O O O O O O <br /> IL i <br /> date <br /> Graph 2 <br /> MW-3 TPHg <br /> 500 - <br /> 400 -- <br /> 300 --- MW-3 TPHg <br /> w 200 --- —Linear (MW-3 TPHg) <br /> 100 --- - <br /> 44 40 <br /> C00 00 0A 00 00 00 0^ O� 00 Q� 00 00 <br /> a&" ak a11, m1&1 aS a6%, aS ak ak, <br /> date <br /> Graph 2 2 shows that MW-3 groundwater monitoring results for TPHg for Case #1 were <br /> declining at the time of closure in 1997, while Graph 1 shows MW-2 had one final TPHg <br /> detection in January 1997 of 170 pg/L after four quarters at or below detection limits of 50 <br /> pg/L. However, the combined graphs for Case #1 and Case #2 data show an increasing <br />