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Y k <br /> �r <br /> IN1 Ell <br /> i 1 <br /> TABLE 2CONCENTRATTONS . (ug/L.) OF..PETROLEUM HYDROCARBON CONSTITUENTS IN <br /> GROUNDWATER, FORMER EXXONRS .:7-1.050, 9.09 `WEST HAMMER LANE, <br /> STOCKTON, CALIFORNIA; NOVEMBER 1986 JUNE 1990 <br /> Total <br /> Well Petroleum <br /> i No. Date Benzene. Toluene Xylenes Eth lbenzene. Hydrocarbons _Laboratory 4. <br /> MW1 11/i3/86 5.8 0.5. 1 .3 NA 290 . Sequoia <br /> MW1 06/26/87 62.2 141 .4 - 772.4 .155.4 2,750 Environ <br /> MW1 02/11 /88 <0.5 <0.5 <0.5 <0.5 <100 Enseco <br /> MW1 05/23/88 <0:5 0.9 <0.5 <0.5 <50 WESCO (Pace) <br /> MW1 08/26/88 <0.5 <0:5 <0.5 <0.5 <50 Pace <br /> MW1 01/07/89 <0.2` <0.2 <'0.2 r0.2 <250 Pace <br /> y MW1 05/04/.89 <0.5 <0.5 <0.5 <0.5 <100 Acurex <br /> MW1 07/19/89. . <0.5 1 .5 <0.5 .<0.5 <250 Pace , <br /> MW1 12/19/89 <0.5 <0.5 .<0.5 <0.5 <250 Pace <br /> MW1 02/14/90 0.5 <0.5 <0.5 <0.5 <50 Pace <br /> MW1 06/28/90 <0.5 <0.5 <0.5 <0.5 <50 Pace <br /> MW2 11/13/86 28 0.5 2.2 NA 290 <br /> Sequoia <br /> MW2 06/26/87 : 4.2 1 . 1 2. 1 <0.5 14. 9 Environ <br /> { <br /> MW2 02/11/88 <0.5 <0.5 <0.5 <0.5 < 100 Enseco <br /> MW2 05/23/88 <,0.5 <0.5 <0.5 <0.5 <50 WESCO (Pace) <br /> MW2 08/26/88 . <0.5 <0.5 <0.5 <0.5 <50 Pace <br /> MW2 01/07/.89 <0.2 0.6 .<0:2 <0.2 <250 Pace <br /> MW2 05/04/89 <0..5 <0.5 <0.5 <0.5 <100 Acurex <br /> MW2: 07/19/89 <0.5 <0.5 <0.5 <0.5 <250 Pace <br /> MW2 12/19/89 <0.5 <0.5 <0.5 <0.5 <250 Pace <br /> MW2 02/.14/90 <0.5 <0.5 <0.5 <0.5 <50 Pace <br /> MW2 06/28/90 <0.5 .<0.5 <0.5 <0. 5 <50 Pace <br /> MW3 11/13/86 7;50,0 2,300 NA 890 14,000 Sequoia <br /> MW3 06/26/87. 3,078 462.6 979..3 1 , 108 8,381 Environ <br /> MW3 . 02/11/88 30;0 270 260 13 2, 100 Enseco <br /> MW3 . 05/23/88 c0.5 <0..5 <0.5 <0.5 <50 WESCO (Pace) <br /> i <br /> NA = Not analyzed <br /> * Well not:.properly purged before sample' collection. <br /> e42/71050/sep90/t2 <br /> i _ <br />