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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-52B <br /> Well ID:M-52B <br /> Aquifer: Upper B Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 <br /> Top Elevation:65.67 100,000 40 <br /> Bottom Elevation:23.67 <br /> Screen Depth:22-42 <br /> Total Depth:42 <br /> Diameter:2" 35 <br /> Sampling Sched: NR/Q 10,000 J <br /> elevations in feet mean sea level 30 O> <br /> depths in feet below ground surface Qd <br /> 1,000 co <br /> 25 w <br /> rn � <br /> 3 � <br /> �+ 100 20 E <br /> o m <br /> 15 a° <br /> 10 <br /> _ A 10 <br /> O ILL <br /> U 1 <br /> 5 <br /> 0 0 <br /> Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 <br /> �TCE n CIS o 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 70 of 75 <br />