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1 9 0 <br />f <br />July 31, 2007 <br />Panella Trucking <br />Quality Control: <br />Inorganic - Metals QC <br />Lab ID STK734832 <br />Customer 3009812 <br />3050B <br />06/05/2007:A209 Continued... <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the <br />LCS or CCV recovery. <br />6010B <br />06/06/2007:A - I7203 All analysis quality controls are within established criteria. <br />06/08/2007:A - IT203 All analysis quality controls are within established criteria. <br />7471A <br />06/07/2007:S212 All preparation quality controls are within established criteria. <br />06/07/2007:A - HG201 All analysis quality controls are within established criteria. <br />Inorganic - Wet Chemistry QC <br />2540E 06/22/2007:A238 All preparation quality controls are within established criteria. <br />Table continued on next page... <br />STK734832: Case Narrative Page 2 <br />06/14/2007:5230 All preparation quality controls are within established criteria. <br />06/14/2007:S233 All preparation quality controls are within established criteria. <br />3550A <br />06/06/2007:S225 All preparation quality controls are within established criteria, except: <br />The following note applies to Hexachlorocyclopentadiene: <br />325 QC not within Acceptance Range (AR). Data could not be confirmed by <br />reanalysis. Use results with discretion. <br />The following note applies to 2,4-Dinitrophenol, 4,6-Dinitro-2-methylphenol, <br />Benzidine, 3,3'-Dichlorobenzidine, Hexachlorocyclopentadiene, <br />N-Nitrosodimethylamine: <br />435 Sample matrix may be affecting this analyte. Data was accepted based on the <br />LCS or CCV recovery. <br />The following note applies to 2-Fluorobiphenyl: <br />560 Surrogate percent recoveries not within the Acceptance Range (AR) due to <br />suspected matrix interferences. <br />8015M <br />06/14/2007:A - GC203 All analysis quality controls are within established criteria. <br />8015M -D <br />06/10/2007:S229 All preparation quality controls are within established criteria. <br />06/11/2007:A - GC204 All analysis quality controls are within established criteria. <br />8260B <br />06/14/2007:A - GM211 All analysis quality controls are within established criteria, except: <br />The following note applies to 2-Hexanone, 4-Methyl-2-pentanone (MIBK), <br />Acrylonitrile, Bromomethane, Vinyl Acetate: <br />360 CCV above Acceptance Range (AR). Samples which were non detect for this <br />analyte were accepted. <br />Table continued on next page... <br />STK734832: Case Narrative Page 2 <br />