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F <br /> May 29, 2007 Lab ID STK734024 <br /> Customer 3015419 <br /> Chesney Consulting <br /> Quality Control: <br /> Inorganic - Wet Chemistry QC <br /> 2510B 05/07/2007:A - EC201 Continued..., <br /> 05/07/2007:A - EC201 All analysis quality controls are within established criteria. <br /> 2540C 05/07/2007:A235 All preparation quality controls are within established criteria. <br /> 300.0 05/04/2007:A215 All preparation quality controls are within established criteria, except: <br /> The following note applies to Nitrite: <br /> 435 Sample matrix may be affecting this analyte. Data was accepted based on the <br /> LCS or CCV recovery. <br /> 05/04/2007:A IC204 All analysis quality controls are within established criteria. <br /> 4500-H B 05/03/2007:5346 All preparation quality controls are within established criteria. <br /> r 05/0312007:S - PH301 All analysis quality controls are within established criteria. <br /> 55400 05/04/2007:A218 All preparation quality controls are within established criteria, except: <br /> The following note applies to MBAS (foaming agents): <br /> 435 Sample matrix may be affecting this analyte. Data was accepted based on the <br /> LCS or CCV recovery, <br /> 05/04/2007:A - CHL All analysis quality controls are within established criteria. <br /> Organic QC <br /> 05/08/2007:A209 All preparation .quality controls are within established criteria. <br /> 504,1 05/09/2007:A203 All preparation .quality controls are within established criteria, except: <br /> The following note applies to 1,3-Dibromopropane: <br /> 560 Surrogate percent recoveries not within the Acceptance Range (Alt) due to <br /> suspected matrix interferences. <br /> 05/09/2007:A - GC216 All analysis quality controls are within established criteria. <br /> 524:2 05/08/2007:A - GM205 All analysis quality controls are within established criteria, except: <br /> The following note applies to 1;,1,2-Trichlorotrifluoroethane, 1,I-Dichloroethylene, <br /> 1,2,3-Trichloropropane, 2,2-Dichloropropane, Carbon Tetrachloride, Chloromethane, <br /> Dibromomethane, Hexachlorobutadiene, Trichlorofluoromethane: <br /> 360 CCV above Acceptance 'Range (AR). Samples which were non detect for this <br /> analyte were accepted. <br /> 504.1 All surrogate quality controls are within established criteria, except: <br /> STK73402401 for 1,3-Dibromopropane <br /> 560 Surrogate percent recoveries not within the Acceptance Range (AR) due to <br /> suspected matrix interferences_ <br /> Case narrative continued on next page... <br /> STK734024: Case Narrative Page 2 <br />