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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-18C1 <br /> Well ID:M-18C1 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 /> Aquifer: Intermediate C 100,000 60 <br /> Top Elevation:65.75 <br /> Bottom Elevation:-83.25 <br /> Screen Depth: 129-149 <br /> Total Depth: 149 10,000 50 <br /> Diameter:5" <br /> Sampling Schad:A <br /> a y <br /> Q 1,000 40 <br /> elevations in feet mean sea level <br /> depths in feet below ground surface J GN <br /> N <br /> 3 a <br /> U) 100 30 44mi <br /> E <br /> 10 �Q oP°o�i o,° d o m v 8 g 20 0 <br /> a) <br /> U D <br /> 0 p p y <br /> U 1 I 10 Li <br /> bl om0000 000000 0 0 0 0 0 0 0 0 o m o 0 0 0 0 <br /> 0 0 <br /> 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 /> TCF o 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 27 of 75 <br />