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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-31C1 <br /> Well ID: M-31C1 <br /> Aquifer: Intermediate C Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 <br /> Top Elevation:57.60 100,000 60 <br /> Bottom Elevation:-72.4 <br /> Screen Depth: 120-125 <br /> Total Depth: 130 <br /> Diameter:2" <br /> Sampling Schad:Q 10,000 50 <br /> elevations in feet mean sea level C d <br /> depths in feet below ground surface Q <br /> 1,000 40 <br /> rn rn <br /> o <br /> d <br /> c 100 8 0 30 E <br /> R o 'si ` o 0 0 8 g o 8 0 <br /> 10 20 <br /> c <br /> o <br /> U LL <br /> 1 10 <br /> 0 0 <br /> Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 <br /> —A-TCE SCIS --tr vC —$--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 typically 0.5 ppb,but <br /> range from 0.5 to 500 ppb,historically. See Appendix B for specific values. <br /> Well M-31 C2/D <br /> Well ID: M-31C2/D <br /> Aquifer: Intermediate C Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 <br /> Top Elevation:57.60 100,000 60 <br /> Bottom Elevation:-154.4 <br /> Screen Depth: 196-211 <br /> Total Depth:212 <br /> Diameter:2" 10,000 50 _ <br /> Sampling Schad:SA <br /> a> <br /> elevations in feet mean sea level C d <br /> depths in feet below ground surface J 1,000 40 mw <br /> M <br /> C <br /> Ul � <br /> c 100 30 <br /> .2 E <br /> o <br /> 10 20 R <br /> c <br /> o <br /> U LL <br /> 1 10 <br /> n n n n n <br /> 0 LIM 0 <br /> Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Jan-11 <br /> ——TCE —CIS +vC —+--Water Elevation <br /> Appendix C <br /> Page 43 of 75 <br />