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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: 04/18/2007 <br /> Sample Matrix: Water Date Analyzed: 04/18/2007 <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: PWG0700595 <br /> Lab Control Sample <br /> PWG0700595-3 <br /> Lab Control Spike o <br /> /oRec <br /> Analyte Name Result Expected %Rec Limits <br /> 1,1,1,2-Tetrachloroethane 10.1 10.0 101 88-118 <br /> 1,1,1-Trichloroethane(TCA) 9.81 10.0 98 83-120 <br /> 1,1,2,2-Tetrachloroethane 8.68 10.0 87 81-120 <br /> 1,1,2-Trichloroethane 9.11 10.0 91 86-118 <br /> 1,1,2-Trichloroirifluoroethane 12.0 10.0 120 76-143 <br /> 1,1-Dichloroethane 9.39 10.0 94 82-123 <br /> 1,1-Dichloroethene 10.4 10.0 104 81-125 <br /> 1,1-Dichloropropene 8.13 10.0 81 71-113 <br /> 1,2,3-Trichlorobenzene 10.3 10.0 103 60-128 <br /> 1,2,3-Trichloropropane 8.86 10.0 89 78-119 <br /> 1,2,4-Trichlorobenzene 10.2 10.0 102 71-125 <br /> 1,2,4-Trimethylbenzene 8.76 10.0 88 87-115 <br /> 1,2-Dibromo-3-chloropropane 16.8 20.0 84 60-125 <br /> 1,2-Dibromoethane(EDB) 9.68 10.0 97 83-115 <br /> 1,2-Dichlorobenzene 9.61 10.0 96 88-117 <br /> 1,2-Dichloroethane(EDC) 9.45 10.0 95 84-125 <br /> 1,2-Dichloropropane 8.96 10.0- 90 77-127 <br /> 1,3,5-Trimethylbenzene 8.55 10.0 86 85-115 <br /> 1,3-Dichlorobenzene 9.45 10.0 95 83-124 <br /> 1,3-Dichloropropane 8.57 10.0 86 83-114 <br /> 1,4-Dichlorobenzene 9.55 10.0 96 87-118 <br /> 2,2-Dichloropropane 10.2 10.0 102 85-129 <br /> 2-Butanone(MEK) 51.1 50.0 102 71-125 <br /> 2-Chlorotoluene 8.22 10.0 82 82-116 <br /> 2-Hexanone 52.1 50.0 104 69-123 <br /> 4-Chlorotoluene 8.13 10.0 81 79-115 <br /> 4-Isopropyltoluene 8.85 10.0 89 77-119 <br /> 4-Methyl-2-pentanone(MIBK) 54.2 50.0 108 71-128 <br /> Acetone 50.4 50.0 101 71-122 <br /> Acrylonitrile 18.7 20.0 93 78-124 <br /> Benzene 9.26 10.0 93 83-123 <br /> Bromobenzene 11.0 10.0 110 85-117 <br /> Bromochloromethane 10.9 10.0 109 83-128 <br /> Bromodichloromethane 9.67 10.0 97 88-122 <br /> Bromoform 11.4 10.0 114 82-129 <br /> Bromomethane 9.71 10.0 97 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 /> 35 <br /> Printed: 04/25/2007 10:50:51 Form 3C-Organic Page 1 of 2 ' <br /> P:\STEALTMCRYSTAL.RPTTorm3LCS.rpt Superset Reference: RR13545 <br />