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i Wm. J. Hunter &Associates TABLE A MARCI'S DIESEL SERVICE,"2969 Loomis Road, Stockton, CA Results of laboratory analyses of water samples from monitoring wells since start of project. __5ATE TEST BENZENE TOLUENE ETHYL XYLENE TEPH TPHg BENZENE, Units _2&1_ u u u L m L m L Method EPA 602 ;EPA 602 EPA 602 EPA 602 80I5M 8015M 4/16/92 All ND-(0.3) `ND- 0.3 ND-(O.3) ND-(0.3) ND-(0.05) ND-(,05) M 5115/ 92 All ND- 0.3 ;ND-(0.3) ND-(0.3) ND-(0.3) ND-(0.05) ND-(,05) 9/15/92 MW-1 ND-(O.5) ND-(0.5) ND- 0.5) ND-(0,5) 0,11--L0 5) NT 12/30/92 MW-1 ND-(0.5) .ND- 0,5 ND-(0.5 ND-(0.5) ND-(.05) NT 3/17/93 MW-1 ND-(0.5) SND-(0.5) ND-(0,5) ND-(O,5) ND-(.05) NT 6/18193 MW-1 2,5-(0.5 'ND- 0.5 ND-(0.5) 7-(0.5) 3.0- .OS) NT 9/20/93 MW-1 0.9- 0.5 ND- 0.5 ND-(O.5) ND-(0.5) ND-(,05) NT 1/3//94 MW-1 0.75-(0.3) ND- 0.3 ND-(0.3) ND-(0.3) 0.21- ,OS) NT 5117194 All ND- 0.3 ND- 0.3 ND- U.3} ND-(0.3) ND-(,05) NT 8/31194 All ND-(0.3) ''ND-(0.3) ND-(0.3) ND-(0.3) ND-(.05) NT 11/21/94 MW-1 ND-(0.3) ND-(0.3) ND-(03) ND-(0.3) 0.34-(.05) NT 11/21/94 MW-2 ND-(0,3) ND- 0.3 ND-(0.3) ND-(0.3} ND-{,05 NT 11/21/94 MW-3 .-ND-(0,3ND-(0.3) ND-(0.3) ND-(0,3) ND-(.05) NT 10/10/96 MW-1 ND-(0.3) ND-(0.3) N2-(0.3 _LLT.3) ND-(.05) NT 11/27/96 MW-1 ND-(0.3) ND-(0.3) 0.4-(0.4) 0.8-(0.3} . ND-(.05) 222-(.05) 9/5/97 MW-1 ND-0.3 ND- 0.3 ND-(0.3) ND-0,3) 0,151* ND-(.05) 9/5/97 MW-4 0,3- 0.3 ND- 0.3 ND-(0.3) 1.0-(0.3) 3.030* ND-(.05) 1212/97 MW-4 ND<0.3 ND<0.3 ND<0.3 ND<O,3 22.0* ND<50 3/30/98 MW-1 ND<0.3 ND<0.3 ND<0,3 ND<0.3 .435* ND<50 3130198 MW-4 <6,0 <6.0 <6.0 <6.0 11,5* <1000 711/98 MW-1 ND ND ND ND 0.318* ND 7/1198 MW-4 <3.0 <3.0 <3.0 <3.0 2.270* <500 NOTES:. 1 - * - Diesel range organics, { 2 - MTBE ND when analyzed in'October, 1996: 3 - MTBE below detection limits in July, 1998 WM. J. & ASSOC.. 4 2220 LOMA VisTA DR. SUMMARY OF RESULTS OF ANALYSES OF WATER SAM- SACRAMEIVTO,CA 95825 PLES FROM MONITORING WELLS SINCE START OF TABLE Q PROJECT.