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Table 4 <br /> Comparison of A-Zone Concentrations in Historic Borings at Industrial Avenue <br /> Monitoring Well Installation Report <br /> Former Nestle USA, Inc. Facility <br /> Ripon, CA 95366 <br /> Sample Depth Analytical results (Ng/1) <br /> Well (bgs) Sample Date <br /> TCE cis-1,2-DCE trans-1,2-DCE 1,1,-DCE 1,1-DCA Chloroform VC <br /> B-2 47 feet 05/15/07 310 ND ND ND 5.8 33 ND <br /> M-50A 45 -46 feet 12/18/09 28 <0.50 <0.50 <0.50 <0.50 <1.0 <0.50 <br /> CPT-1 51 - 54 feet 08/30/05 3,300 <20 <20 <20 75 70 <20 <br /> M-51A 55 feet 12/15/09 3.3 <0.50 <0.50 0.64 3.8 19 <0.50 <br /> Notes: <br /> µg/l_= micrograms per liter <br /> bgs = below ground surface <br /> * = Only parameters with concentrations above their respective reporting limits are presented. <br /> TCE =trichloroethene <br /> cis-1,2-DCE =cis-1,2-dichloroethene <br /> trans-1,2-DCE =trans-1,2-dichloroethene <br /> VC =vinyl chloride <br /> 1,1-DCE = 1,1-dichloroethene <br /> 1,1-DCA= 1,1-dichloroethane <br /> ND = Reported as non-detect(below the laboratory reporting limit) <br /> Page 1 of 1 <br />