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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-48A <br /> Well ID:M-48A <br /> Aquifer: Upper B/A Jun-07 Dec-07 Jun-08 Nov-08 May-09 Nov-09 May-10 Nov-10 <br /> Top Elevation:70.20 100,000 45 <br /> Bottom Elevation:9.20 <br /> Screen Depth:50-60 <br /> Total Depth:61 40 <br /> Diameter:2' 10,000 <br /> Sampling Schad:Q <br /> 35 <br /> elevations in feet mean sea level > <br /> depths in feet below ground surface Q- d <br /> Q- 1,000 30 <br /> J N <br /> 07 <br /> 3 25 R <br /> 100 E <br /> 0 0 20 > <br /> m o <br /> 0 <br /> 10 o ° 15 S <br /> U <br /> 10 Lf <br /> C <br /> 1 - <br /> 5 <br /> ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ <br /> 0 0 <br /> Jun-07 Dec-07 Jun-08 Nov-08 May-09 Nov-09 May-10 Nov-10 <br /> ° 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 66 of 75 <br />