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Historical Groundwater Elevations and TCE/cis-1,2-DCE/VC Concentrations <br /> 2010 Annual Report <br /> Former Nestle USA Inc. Facility <br /> Ripon, California <br /> Well M-42A <br /> Well ID:M-42A <br /> Aquifer: Upper Jan-07 Jul-07 Jan-08 Jul-08 Jan-09 Jul-09 Jan-10 Jul-10 Dec-10 <br /> Top Elevation:64.47 100,000 50 <br /> Bottom Elevation:-55.53 <br /> Screen Depth:89-109 <br /> Total Depth: 120 45 <br /> Diameter:2' 10,000 <br /> Sampling Schad:Q 40 <br /> elevations in feet mean sea level > <br /> depths in feet below ground surface Q 35 d <br /> 1,000 <br /> J rn 30 ur= <br /> 3 R <br /> 100 25 £ <br /> o <br /> 20 0 <br /> 10 16 <br /> v 15 r <br /> c y <br /> o d <br /> v <br /> 10 LL <br /> 1 <br /> 5 <br /> Q fl Q Q Q fl o fl Q Q Q Q Q Q Q Q <br /> 0 0 <br /> Jan-07 Jul-07 Jan-08 Jul-08 Jan-09 Jul-09 Jan-10 Jul-10 Dec-10 <br /> L TCE o CIS 0 VC -4-Water Elevation <br /> Note: All concentration values that are less than the detection limit have been plotted as one-half of the detection limit. Detection limits are <br /> typically 0.5 ppb,but range from 0.5 to 500 ppb,historically. See Appendix B for specific values. <br /> Appendix C <br /> Page 59 of 75 <br />