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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-51A <br /> Well ID:f Nov-09 Jan-10 Mar-10 Ma 10 Jul-10 Se v-10 <br /> Aquifer:UpperperA Y- P- <br /> 10 No <br /> Top Elevation:66.90 100,000 45 <br /> Bottom Elevation:-3.10 <br /> Screen Depth:52-67 <br /> Total Depth:70 40 <br /> Diameter:2' 10,000 <br /> Sampling Sched:NR/Q <br /> 35 <br /> elevations in feet mean sea level > <br /> depths in feet below ground surface CL 1,000 30 a) <br /> J N <br /> 3 25 <br /> 100 <br /> 20 d <br /> o <br /> s <br /> a=i 10 15=° <br /> v <br /> L y <br /> V 10 ti <br /> 1 <br /> 5 <br /> 0 0 <br /> Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 <br /> ---TCE –r-CIS _vC tWaterElevation <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 69 of 75 <br />