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ROLABORATORIES a N A L '�"T I C A L ..i <br /> QC Summary Report 10/10/2000 <br /> BSK Submission : 2000090726 <br /> Client: BSK and Associates-Sacramento <br /> Date Submitted 09/21/2000 <br /> Project ID : <br /> Project Desc: URSA Engineering <br /> BSK StarLims Run #: 12355 <br /> Surrogate Results <br /> Analyte QC Typc Sort.Result UCL LCL Date <br /> Fluorobenzene LCS N/A 94.3 %Rec 95.6 130 70 10/03/00 Acceptable <br /> Fluombenzene LCSD N/A 93.7 %Rec 95.6 130 70 10/03/00 Acceptable <br /> Fluorobenzene RBLK N/A 95.6 %Rec 130 70 I0/03/00 Acceptable <br /> BSK StarLims Run #: 12429 <br /> Analyte Results Matrix %Rec Spike Spk Matrix <br /> Analyte QC Typc Spike ID Result Units or RPD RPD Cone Conc UCL LCL Date <br /> Benzene LCS N/A 0.095 mg/Kg 95 0.1 ND 130 70 10/04/00 Acceptable <br /> Ethylbenzene LCS N/A 0.097 mg/Kg 97 0.1 ND 130 70 10/04/00 Acceptable <br /> Methyl-t-Butyl Ether LCS N/A 0.428 mg/Kg 106 0.4 ND 130 70 10/04/00 Acceptable <br /> Toluene LCS N/A 0.095 mg/Kg 94 0.1 ND 130 70 10/04/00 Acceptable <br /> Total Xylenes LCS N/A 0.287 mg/Kg 95 0.3 ND 130 70 10/04/00 Acceptable <br /> Benzene LCSD N/A 0.092 mg/Kg 92 3.2 0.1 ND 130 70 10/04/00 Acceptable <br /> Ethylbenzene LCSD N/A 0.094 mg/Kg 94 3.1 0.1 ND 130 70 10/04/00 Acceptable <br /> Methyl-t-Butyl Ether LCSD N/A 0.413 mg/Kg 103 3.6 0.4 ND 130 70 10/04/00 Acceptable <br /> Toluene LCSD N/A 0.091 mg/Kg 89 4.3 0.1 ND 130 70 10/04/00 Acceptable <br /> Total Xylenes LCSD N/A 0.281 mg/Kg 93 2.1 0.3 ND 130 70 10/04/00 Acceptable <br /> Benzene RBLK N/A 0 mg/Kg <0.005 0.005 N/A 10/04/00 Acceptable <br /> Ethylbenzene RBLK N/A 0 mg/Kg 10.005 0.005 N/A 10/04/00 Acceptable <br /> Methyl-t-Butyl Ether RBLK N/A 0 mg/Kg <0.05 0.05 N/A 10/04/00 Acceptable <br /> Toluene RBLK N/A 0.001 mg/Kg <0.005 0.005 N/A I0/04/00 Acceptable <br /> Total Xylenes RBLK N/A 0 mgfKg <0.005 0.005 N/A 10/04/00 Acceptable <br /> TPH as Gasoline RBLK N/A 0.076 mg/Kg < 1 1 N/A 10/04/00 Acceptable <br /> Surrogate Results <br /> Analyte QC Typc Surf. Result UCL LCL Date <br /> Fluorobenzene LCS N/A 97.9 %Rec 87.3 130 70 10/04/00 Acceptable <br /> Fluorobenzene LCSD N/A 91.0 %Rec 87.3 130 70 10/04/00 Acceptable <br /> Fluorobenzene RBLK N/A 87.3 %Rec 130 70 10/04/00 Acceptable <br /> %Rec. Percent Recovered Parent Sample: Sample used as background matrix for MS/MSD Page 5 of 8 <br /> RPD: Relative Percent Difference OOS-High: QC Result Above UCL <br /> UCL: Upper Control Limit OOS-Low: QC Result Below LCL <br /> LCL: Lower Control Limit <br />