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TABLE 4 <br /> LABORATORY RESULTS OF VAPOR SAMPLES FROM INDIVIDUAL WELLS <br /> THRIFTY OIL STATION# 171, STOCKTON, CA <br /> ELL t ANALYTICAL PARAMETERS <br /> MPLE DATE TPP B T E X MTBE COMMENTS <br /> ID SAMPLED ( my tnv mv) my ( tnv) (Pptnv <br /> 11/14/02 3,410 _ 98 206 _ 26 _ 86_ 904 <br /> 12/11/02 9,170 174 - -282 47 106 2,110 - - -- ---- _ _ <br /> 01/07/03 19,600 411-- 643 _ 53 191 951 <br /> 01/30/03 I i 100 $9 1_86 24_ 102 134 <br /> 02/11/03 2,170 6 ---- 105 37 166 <T5 - - ----- - - <br /> 03/12/03 1,310 20 76 16 54 10 <br /> _ 04/08/03 361 __ 3 7 25 55 23 24 _ <br /> 05/13/03 374 42 63 _ 87 - 60 19 <br /> 06/17/03 120 0 9 26 -612 049 - - 7 0 - - <br /> -07/16103 _ 232 015 20 1 7--- - - -9-0-�- _ _<0 1 - - ---- - — - <br /> __08/05/03 279 035 16 T 035 25 019 <br /> 09/09/03 281 0 67 ---14 - <br /> 14 - 4 9 _ _20_ <br /> --10114103 1,180- 8 t 42 -- 48 _ 26 41 - - --- ----� <br /> 11/18/03 _ _ 1_,160 5 6 58 8 T 32 14_ <br /> 12/08/03 663__ 5_ 42 35_ _6_1 32 4 0 <br /> 01/12/04 T 1,010 9 _ $2 11 71 16 <br /> _02/23104 _ 528_ T 1 66 -4721--- 1 19 _5 01 , 1 8_4 <0 001 BTEX&MTBE by TO-15 <br /> 03/16/04 368 033 12 07 7 7 05 <br /> NOTE Benzene,toluene,ethlybenzene,and xylene analyzed by EPA Method 8021 B <br /> Total petroleum hydrocarbons(TPH)analyzed by EPA Method 8015M <br /> Methyl-tert Butyl Ether(MTBE)analyzed by EPA Method 8021B <br /> *M I BE 1021B/TO-14 <br /> 1IA114 V1 S 14ells PaKL 64)f 6 3/261104 <br />