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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Shaw Environmental&Infrastructure,Inc Service Request: P0700376 <br /> Project: Corral Hollow Landfill,San Joaquin County/124592(Ground Water) Date Extracted: 04/20/2007 <br /> Sample Matrix: Water Date Analyzed: 04/20/2007 <br /> Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> Extraction Method: EPA 5030B Units: ug/L '. <br /> Analysis Method: 8260B Basis: NA <br /> Level: Low <br /> Extraction Lot: PWG0700642 <br /> Lab Control Sample <br /> PWG0700642-3 <br /> Lab Control Spike %Rec <br /> Analyte Name Result Expected %Rec Limits <br /> 1,1,1,2-Tetrachloroethane 10.3 10.0 103 88-118 <br /> 1,1,1-Trichloroethane(TCA) 10.0 10.0 100 83-120 <br /> 1,1,2,2-Tetrachloroethane 8.87 10.0 89 81120 <br /> 1,1,2-Trichloroethane 9.09 10.0 91 86-118 <br /> 1,1,2-Trichlorotrifluoroethane 11.7 10.0 117 76-143 <br /> 1,1-Dichloroethane 9.00 10.0 90 82-123 <br /> 1,1-Dichloroethene 10.3 10.0 103 81-125 <br /> 1,1-Dichloropropene 8.18 10.0 82 71-113 <br /> 1,2,3-Trichlorobenzene 10.6 10.0 106 60-128 <br /> 1,2,3-Trichloropropane 9.18 10.0 92 78-119 <br /> 1,2,4-Trichlorobenzene 10.5 10.0 105 71-125 <br /> 1,2,4-Trimethylbenzene 9.28 10.0 93 87-115 <br /> 1,2-Dibromo-3-chloropropane 16.8 20.0 84 60-125 <br /> 1,2-Dibromoethane(EDB) 9.84 10.0 98 83-115 <br /> 1,2-Dichlorobenzene 10.0 10.0 100 88-117 <br /> 1,2-Dichloroethane(EDC) 9.49 10.0 95 84-125 <br /> 1,2-Dichloropropane 8.77 10.0 88 77-127 <br /> 1,3,5-Trimethylbenzene 8.97 10.0 90 85-115 <br /> 1,3-Dichlorobenzene 9.77 10.0 98 83-124 <br /> 1,3-Dichloropropane 8.78 10.0 88 83-114 <br /> 1,4-Dichlorobenzene 9.80 10.0 98 87-118 <br /> 2,2-Dichloropropane 10.2 10.0 102 85-129 <br /> 2-Butanone(MEK) 44.4 50.0 89 71-125 <br /> 2-Chlorotoluene 8.61 10.0 86 82-116 <br /> 2-Hexanone 44.9 50.0 90 69-123 <br /> 4-Chlorotoluene 8.54 10.0 85 79-115 <br /> 4-Isopropyltoluene 9.13 10.0 91 77-119 <br /> 4-Methyl-2-pentanone(MIBK) 48.1 50.0 96 71-128 <br /> Acetone 45.8 50.0 92 71-122 <br /> Acrylonitrile 16.3 20.0 81 78-124 <br /> Benzene 9.41 10.0 94 83-123 <br /> Bromobenzene 11.0 10.0 110 85-117 <br /> Bromochloromethane 11.5 10.0 115 83-128 <br /> Bromodichloromethane 9.93 10.0 99 88-122 <br /> Bromoform 11.6 10.0 116 82-129 <br /> Bromomethane 8.84 10.0 88 75-146 <br /> Results flagged with an asterisk(*)indicate values outside control criteria. <br /> Percent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded. <br /> 37 <br /> Printed: 04/25/2007 10:50:54 Form 3C-Organic Page 1 of 2 ' <br /> P:\.SMALIMCRYSTAL.RP71Form3LCS.rpt Superset Reference: RR13545 <br />