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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-23A <br /> Well ID:M-23A <br /> Aquifer:Upper AB Jan-91 Jan-93 Jan-95 Jan-97 Jan-99 Jan-01 Jan-03 Jan-05 Jan-07 Jan-09 Jan-11 <br /> Top Elevation:64.05 100,000 60 <br /> Bottom Elevation:-30.95 <br /> Screen Depth:74.8-94.8 <br /> Total Depth:95 <br /> Diameter:4" 10,00071F 50 <br /> Sampling Schad:A <br /> CD <br /> elevations in feet mean sea level a C > <br /> 10, m <br /> depths in feet below ground surface O' 1,000 40 2 <br /> J y <br /> Ol H <br /> M <br /> M <br /> c 100 30 E <br /> CD <br /> i0 0 > <br /> o O <br /> d <br /> 1020 20 <br /> 0 6 <br /> 4 <br /> O <br /> c , 6 <br /> 0 0 0 0 0 0 <br /> V o00 0 0 8 O 0 LL <br /> 1 0 p Q L p oQ o o ❑ 0 0 10 <br /> 00000 0 0 0 ❑ 00 0 0 Q Q <br /> 0 0 <br /> Jan-91 Jan-93 Jan-95 Jan-97 Jan-99 Jan-01 Jan-03 Jan-05 Jan-07 Jan-09 Jan-11 <br /> -- _CIS o VC _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 32 of 75 <br />