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Monthly Treatment System Performance Report <br /> Month: April-09 <br /> Submitted by: Nestle USA, Inc. <br /> Submittal Date: 28-May-09 <br /> System Performance for Groundwater Treatment System <br /> EU-3&EU-4 E2&E6 <br /> Constituents of Concern Units Industrial Avenue Stockton Avenue <br /> Sample Location 4/7/2009 4/23/2009 4/7/2009 4/23/2009 <br /> TCE 40 NR 18 NR <br /> 1,1-DCE <0.50 NR <0.50 NR <br /> cis-1,2-DCE <0.50 NR 31 NR <br /> Influent trans-1,2-DCE <br /> pg <0.50 NR <0.50 NR <br /> Chloroform 13 NR <1.0 NR <br /> VC <0.50 NR 12 NR <br /> TCE <0.50 <0.50 <br /> 1,1-DCE <0.50 <0.50 <br /> Air Stripper Effluent cis-1,2-DCE µg/L Not Applicable <0.50 <0.50 <br /> trans-1,2-DCE <0.50 <0.50 <br /> VC <0.50 <0.50 <br /> Chloroform <1.0 I <1.0 <br /> Air Stripper Removal TCE 100% <br /> DCE % Not Applicable 100% <br /> Efficiency VC 100% <br /> TCE <0.50 <0.50 <br /> 1,1-DCE <0.50 <0.50 <br /> Carbon Middle cis-1,2-DCE µg/L <0.50 <0.50 Not Applicable <br /> trans-1,2-DCE <0.50 <0.50 <br /> VC <0.50 <0.50 <br /> Chloroform <1.0 <1.0 <br /> TCE <0.50 <0.50 NA NA <br /> 1,1-DCE <0.50 <0.50 NA NA <br /> cis-1,2-DCE <0.50 <0.50 NA NA <br /> trans-1,2-DCE µg/L <0.50 <0.50 NA NA <br /> Carbon Effluent VC <0.50 <0.50 NA NA <br /> Chloroform <1.0 <1.0 NA NA <br /> Temperature °C 18.9 23.9 20.7 22.1 <br /> pH Su 7.52 7.54 8.55 8.54 <br /> Conductivity µS/cm 1,290 1,150 1,050 1,000 <br /> Treatment System TCE 100% NA 100% NA <br /> DCE NA NA 100% NA <br /> Removal Efficiency VC % NA NA 100% NA <br /> Chloroform 100% NA NA NA <br /> Notations <br /> µg/L =Micrograms per liter µS/cm =Microsiemens per centimeter <br /> Su =Standard units NA=Data not applicable <br /> TCE =Trichloroethylene VC =Vinyl Chloride <br /> DCE =Dichloroethylene <br /> ND =Not Detected <br /> Page 2 of 4 <br />