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Associated Laboratories <br /> QA / QC EPA Methods 8260, 624, & 524.2 - GCMS # 4 <br /> Sample ID. MS/MSD-water sample 160554-932 <br /> Date Analyzed. November 29, 2005 6-42pm <br /> Sample Matrix, water <br /> Units: pg/L <br /> Applies to LR 159393, 160554 <br /> Sample Spike Spike Dup Spike Dup QC I Limits <br /> Compound Conc I Added I Res Res % Rec % Rec RPD RPD % Rec <br /> 1,1-Dichloroethene 000 500 55 97 56 27 112 113 1 22 59 - 172 <br /> MTBE 14009 500 18945 18397 99 88 3 24 62 - 137 <br /> Benzene 41 10 500 93 88 8845 106 95 6 24 62 - 137 <br /> Trichloroethene 000 50 0 52 89 5012 106 100 5 21 66 - 142 <br /> Toluene 000 5010 1 5366 50 32 107 1 101 6 21 59 - 139 <br /> Chlorobenzene 0 00 50 O–L 50 49 47 49 101 1 95 6 21 60 - 1331 <br /> '=Outside QC limits due to high concentration in sample <br /> Sample ID: LCS - water <br /> Date Analyzed- November 29, 2005 12 27pm <br /> Sample Matrix water <br /> Units- pg/L <br /> Sample Spike Spike Spike QC Limits <br /> rco—mpound Conc Added Res % Rec RPD % Rec <br /> 1,1-Dichloroethene 000 50.0 5834 117 22 59 - 172 <br /> MTBE 000 50 0 4883 98 24 62 - 137 <br /> Benzene 000 50 0 5333 107 24 62 - 137 <br /> Trichloroethene 000 500 5570 111M60 - 133 <br /> 66 - 142 <br /> Toluene 000 50 0 5240 105 59 - 139 <br /> Chlorobenzene 000 50 0 4999_ 1 ____ 100 <br /> If Sample Result>4 tunes Sp*e Added,then"NC" <br /> Surrogate Recovery GCMS # 4 <br /> Limits <br /> Compound MBI MS MSD LCS % Rec <br /> Dibromofluoromethane 104 105 104 104 70-135 <br /> 1,2-Dichloroethane-d4 112 114 109 113 70-135 <br /> Toluene-d8 110 101 95 105 11 70-135 <br /> p-Bromofluorobenzene 106 99 95 100 70-135 <br /> • <br /> 8260LB_11 <br />