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F Table 5 Summary of Analytical Results for Hazardous Substances Detected in Groundwater Samples In The Vicinity Of Lincoln Center, Stockton, California fall measurements in micrograms per liter(pg/IJ) Well Name DateSampled PCE TCE cis-1,2-DCE trans-1,2-DCE VC Notes MW-21 11/14/96 1,400 110 32 <2.5 <2.5 MW-30 11/29/90 <0.5 <0.5 <0.5 <0.5 <0.5 11/29/90 <0.5 <0.5 <0.5 <0.5 <0.5 11/21/94 5.36 0.16 <0.13 <0.08 <0.2 11/15/95 7.2 <0.29 <0.5 <0.5 <0.5 2 11/15/95 6.8 <0.26 <0.5 <0.5 <0.5 s 2/14/96 2.7 <0.5 <0.5 <0.5 <0.5 5/23/96 2.5 <0.5 <0.5 <0.5 <0.5 5/23/96 2.6 <0.5 <0.5 <0.5 <0.5 8/14/96 1.9 <0.5 <0.5 <0.5 <0.5 11/13/96 2.7 <0.5 <0.5 <0.5 <0.5 MW-100 11/1/96 3,400 22 13 1 1 11/12/96 970 5.7 3.2 <0.5 <0.5 MW-101 11/15/96 7,000 200 220 i0 50 NOTES: All samples were analyzed using EPA Method 601/602 unless noted Chevron and Exxon monitoring well identifiers have been modified to include"CH"and"EX,"respectively,to differentiate these wells from existing site monitoring wells. Analyte was either not analyzed or not reported Analytical results for these samples from the Phase I Site Assessment Report,Lincoln Village Center,Leedshill-Herkenhoff,Inc., August, 1988 and from a table titled:"Table II RWQCB Lincoln Village Well Survey-Spring 1987." + z Result was reported as 1,2 DCE without specifying whether it was cis-or trans-1,2 DCE. 3 Analytical results for these samples from Nakano(1992). Analytical data for these samples from Gettler-Ryan,Inc.(1995). s Results from split samples collected by LFR.Samples were analyzed using EPA Method 8260A(LFR 1996b and 1997a). Analytical data for these samples from Western Geo-Engineers,Inc.(1993, 1994, 1995). s Analytical data for these samples from LFR 1997a. i PU8LICW2.X1_5/Sheetl 9 of 10 3/13/97