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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-41A <br /> Well ID:M-41A <br /> Aquifer: Upper Jan-07 Jul-07 Jan-08 Jul-08 Jan-09 Jul-09 Jan-10 Jul-10 Dec-10 <br /> Top Elevation:62.64 1,000 — 45 <br /> Bottom Elevation:-83.36 <br /> Screen Depth:92-117 <br /> Total Depth: 146 40 <br /> Diameter:2' <br /> Sampling Schad:Q j <br /> 35 d <br /> elevations in feet mean sea level Z' 100 m <br /> depths in feet below ground surface C. 30 <br /> y <br /> J � <br /> 25 E <br /> ur 10 > <br /> c <br /> 0 20 0 <br /> s <br /> R o o !a <br /> 15 <br /> v 0 0 O d <br /> G 1 O O O Q A Q n 10 l` <br /> U O _ O O ° C7 <br /> 0 0 0 0 0 0 5 <br /> 0 0 <br /> Jan-07 Jul-07 Jan-08 Jul-08 Jan-09 Jul-09 Jan-10 Jul-10 Dec-10 <br /> A TCE o CIS o vc -4—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 <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 57 of 75 <br />