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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-12A <br /> Well ID:M-1 2A <br /> Aquifer: UpperA/B Jan-87 Jan-89 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:65.92 100,000 60 <br /> Bottom Elevation:-45.08 <br /> Screen Depth:89-109 <br /> Total Depth: 111 <br /> Diameter:6" 10,000 50 <br /> Sampling Schad:Atiff <br /> elevations in feet mean sea levelQ <br /> depths in feet below ground surface G d <br /> J 1,000 40 m <br /> rn w <br /> A <br /> U) <br /> 100 A /\A/\ 30 <br /> o A n A E <br /> °iso° A i� i,, > <br /> A00 iso A o A i� ° ° � O <br /> 44i 10 0 ° i� A 0 20 =° <br /> cf o0 0 <br /> G ° o A <br /> 0 0 0 ° 0 D u- <br /> 10 <br /> =000 000000 0 0 0 0 n 0 Q 0 0 0 0 0 0 <br /> 0 i 0 <br /> Jan-87 Jan-89 Jan-91 Jan-93 Jan-95 Jan-97 Jan-99 Jan-01 Jan-03 Jan-05 Jan-07 Jan-09 Jan-11 <br /> A TCE = CIS 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 typically 0.5 <br /> ppb,but range from 0.5 to 500 ppb,historically. See Appendix B for specific values. <br /> Appendix C <br /> Page 18 of 75 <br />