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Table 4.j-3. TCE AND PCE CONCENTRATIONS DETECTED IN GROUNDWATER AT DEFENSE DISTRIBUTION REGION WEST, TRACY <br /> (BY EPA METHOD 601) (concluded) <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 WC <br /> Well I .D. Area (Feet BGS) 1986 1987 1988 1989 1990 1986 1987 1988 1989 1990 <br /> LM 25 1 8.2-38.2;' °+•,,350 500 560 470 NS NO NO NO 1.4 NS <br /> LM 26 4 14-34. NO NS NO NS NS 2.4 NS 0.8 NS NS <br /> LM 27A -- 5-25 ND NO NO NS NS NO NO NO NS NS <br /> LM 37 5 15=25 28 11 12 NS NS TR NO NO NS NS <br /> LM 38 b. 1&5 14.5-34.5 NO NO 0.5 NS NS 1.8 NO NO NS NS <br /> LM 42 u. 1 10-30 NO ND •, NO NS NS TR NO NO NS NS <br /> IM 43 b. 3&4 7.5-27.5 NO NO "� NO NS NS NO NO NO NS NS <br /> LM 53 dg. 2 36-46 NS 18 ) 13 NS NS NS 8.8 6.7 NS NS <br /> LM 54 dg. 2 32-42 NS 19 19 NS NS NS 2.4 3.0 NS NS <br /> LM 61 1 20-30 NS 13 25 15 NS NS 15 85 20 NS <br /> LM 74 dg. 3 34.5-54.5 NS NS 0.5 NS NS NS NS 1.8 NS NS <br /> LM 76 dg. 3 26-36 NS NS NS NS 12 NS NS NS NS 2 <br /> LM 77 dg. 3 45.5-55.5 NS NS NS NS NO NS NS NS NS NO <br /> �- LM 80 dg. 3 20-30 NS NS NS 1.1 NS NS NS NS ND NS <br /> N LM 82 dg. 6 22.5-32.5 NS NS NS 0.6 NS NS NS NS 1.4 NS <br /> LM 85 1 88.5-98.5 NS NS NS NS ND NS NS NS NS NO <br /> Compiled by Woodward-Clyde Consultants <br /> TR = Trace levels (Radian data only) <br /> NO = Not detected <br /> NS = Not sampled <br /> BGS = Below Ground Surface <br /> * Wells within clusters are listed in order of increasing depth. <br /> ** Background Well <br /> n. = Near <br /> b. = Between <br /> dg. = Downgradient of numbered area(s) <br /> -- = Not in a designated contaminant area <br /> u. = Upgradient of numbered area(s) <br />