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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-50A <br /> Well ID:M-50A <br /> Aquifer: Upper A Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 <br /> Top Elevation:66.13 100,000 40 <br /> Bottom Elevation: 1.13 <br /> Screen Depth:50-65 <br /> Total Depth:65 <br /> Diameter:2' 35 <br /> Sampling Sched: NR/Q 10,000 <br /> elevations in feet mean sea level 30 j <br /> depths in feet below ground surface CL <br /> Q- 1,000 m <br /> 25 d <br /> N <br /> 01 � <br /> = 100 20 £ <br /> O y <br /> 15 s° <br /> 10 <br /> c ° 10 m <br /> () ° LL <br /> 1 <br /> A 0 5 <br /> 0 0 0 0 <br /> 0 0 <br /> Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 <br /> A TCE o 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 68 of 75 <br />