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90380LL CON-1 <br /> Table 4.3-3. TCE AND PCE CONCENTRATIONS DETECTED IN GROUNDWATER AT DEFENSE DISTRIBUTION REGION WEST, TRACY <br /> (BY EPA METHOD 601) <br /> Trichloroethene (TCE) Tetrachloroethene (PCE) <br /> Screened Concentrations (ug/1 ) Concentrations (ug/1) <br /> Contaminant Interval Radian WCC WCC WCC WCC Radian WCC WCC WCC WCC <br /> Well I .D. Area (Feet BGS) 1986 1987 1988 1989 1990 1986 1987 1988 1989 1990 <br /> t <br /> Monitoring Well Clusters* ; <br /> LM 62 2 20. 30 r NS 8.5 7.6 NS NS NS 3.9 4.5 NS NS <br /> LM 28 2 38-48 15 5.0 11 NS NS 7.8 2.9 5.2 NS NS <br /> LM 29 2 64.5-74.5 36 22 . `'•. 21 NS NS 19 9. 1 8.1 NS NS <br /> LM 39 2 90-100 25 9.2 '� `Y 16 NS NS 8.3 2.2 4.4 NS NS <br /> LM 47 2 124-134 NS ND NO NS NS NS NO NO NS NS <br /> LM 30 2 10-20 38 43 38 NS NS 430 410 340 NS NS <br /> LM 41 2 60-70 4.2 6.3 14 NS NS 4.2 NO 1.4 NS NS <br /> LM 40 2 92-102 12 11 12 NS NS 0.7 NO NO NS NS <br /> LM 482 150-160 NS NO NO NO NS NS NO 2.1 NO NS <br /> rn <br /> LM 49 dg. 2 25-35 NS 17 18 NS NS NS 19 19 NS NS <br /> LM 50 dg. 2 36-46 NS 6.5 24 NS NS NS 4.3 21 NS NS <br /> LM 51 dg. 2 74-84 NS 13 18 NS NS , NS 1.6 4.4 NS NS <br /> LM 91 dg.2 138.5-158.5 NS NS NS NO NS NS NS NS NO NS <br /> LM 52 dg. 2 191-201 NS NO NO NS NS NS NO NO NS NS <br /> LM 55 dg. 2 73-93 NS 15 23 NS NS NS ' -4.9 8.3 NS NS <br /> LM 56 dg. 2 120-140 NS 28 33 23 NS NS 9.3 9.7 8.7 NS <br /> LM 57 dg. 2 180-190 NS NO NO NS NS NS NO NO NS NS <br /> l_M 35 6 9-19 TR NO NO NS NS 7.7 5. 1 7.1 NS NS <br /> LM 36 6 36-46 TR NO NO NS NS TR ND NO NS NS <br /> LM 71 dg. 1&2 34-54 NS NS NO NS NS NS NS NO NS NS <br /> LM 79 dg. 1&2 79-89 NS NS NS NS ND NS NS NS NS NO <br /> LM 89 dg. 1&2 126.5-136.5 NS NS NS NS NO NS NS NS NS NO <br /> LM 5 3 20-30 6.6 1 1.5 NS NS NO NO NO NS NS <br /> LM 31 3 36.5-46.5 TR NO NO NS NS TR ND NO NS NS <br />