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Historical TCE/cis-1,2-DCENC Concentrations <br /> 2010 Annual Report <br /> Former Nestle USA Inc. Facility <br /> Ripon, California <br /> Municipal Well MW-7 <br /> Well ID: MW-7 <br /> Aquifer: Upper/Int. <br /> Top Elevation:72.13 100.00 <br /> Bottom Elevation:-265.87 <br /> 80-120, All concentrations were non-detect through March 1992.Vinyl chloride has <br /> Screen Depth: 142-162, remained non-detect through present andis not represented on graph. <br /> 188-196 <br /> Total Depth:338 <br /> Diameter:24+ <br /> Sampling Sched:Q 10.00 ° 4� <br /> CL °A <br /> elevations in feet mean sea level a <br /> depths in feet below ground surface —1 ° <br /> ° <br /> N <br /> 1.00 ° ° ° °o° ° °°°°°° ° <br /> c <br /> m ° <br /> ° ° ° ° ° ° ° °°°°mom° °°°°m °mom° ° <br /> o ° <br /> 0.10 Laboratory Detection Limit reduced <br /> °mm AM°°m°m°°mm <br /> 0.01 <br /> Dec-91 Sep-94 Jun-97 Mar-00 Dec-02 Sep-05 Jun-08 Feb-11 <br /> A TCE A CIS <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 <br /> ppb,but range from 0.5 to 500 ppb,historically. See Appendix B for specific values. <br /> Page 74 of 75 <br />