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M <br /> LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 06/29/2007 11:04 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC VOC Samples <br /> North Outer Rd. Project Manager: David Vasbinder <br /> Saint Charles, MO 63304 <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> Benzene BQF0932 BQF0932-BS1 LCS 23.220 25.000 0.50 ug/L 92.9 70-130 <br /> Bromodichloromethane BQF0932 BQF0932-BS1 LCS 23.830 25.000 0.50 ug/L 95.3 70-130 <br /> Chlorobenzene BQF0932 BQF0932-BS1 LCS 23.990 25.000 0.50 ug/L 96.0 70-130 <br /> Chloroethane BQF0932 BQF0932-BS1 LCS 22.780 25.000 0.50 ug/L 91.1 70-130 <br /> 1,4-Dichlorobenzene BQF0932 BQF0932-BS1 LCS 24.600 25.000 0.50 ug/L 98.4 70-130 <br /> 1,1-Dichloroethane BQF0932 BQF0932-BS1 LCS 23.150 25.000 0.50 ug/L 92.6 70-130 <br /> 1,1-Dichloroethene BQF0932 BQF0932-BS1 LCS 22.820 25.000 0.50 ug/L 91.3 70-130 <br /> Toluene BQF0932 BQF0932-BS1 LCS 23.180 25.000 0.50 ug/L 92.7 70-130 <br /> Trichloroethene BQF0932 BQF0932-BS1 LCS 26.660 25.000 0.50 ug/L 107 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BQF0932 BQF0932-BS1 LCS 9.6700 10.000 ug/L 96.7 76-114 <br /> Toluene-d8(Surrogate) BQF0932 BQF0932-BS1 LCS 9.9700 10.000 ug/L 99.7 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BQF0932 BQF0932-BS1 LCS 10.050 10.000 ug/L 100 86-115 <br /> Benzene BQF1033 BQF1033-BS1 LCS 22.020 25.000 1.0 ug/L 88.1 70-130 <br /> Bromodichloromethane BQF1033 BQF1033-BS1 LCS 23.130 25.000 0.50 ug/L 92.5 70-130 <br /> Chlorobenzene BQF1033 BQF1033-BS1 LCS 23.250 25.000 0.50 ug/L 93.0 70-130 <br /> Chloroethane BQF1033 BQF1033-BS1 LCS 20.920 25.000 0.50 ug/L 83.7 70-130 <br /> 1,4-Dichlorobenzene BQF1033 BQF1033-BSI LCS 24.580 25.000 0.50 ug/L 98.3 70-130 <br /> 1,1-Dichloroethane BQF1033 BQF1033-BS1 LCS 22.070 25.000 0.50 ug/L 88.3 70-130 <br /> 1,1-Dichloroethene BQF1033 BQF1033-BS1 LCS 21.110 25.000 0.50 ug/L 84.4 70-130 <br /> Toluene BQF1033 BQF1033-BS1 LCS 22.470 25.000 1.0 ug/L 89.9 70-130 <br /> Trichloroethene BQF1033 BQF1033-BSI LCS 21.610 25.000 0.50 ug/L 86.4 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BQF1033 BQF1033-BS1 LCS 9.6000 10.000 ug/L 96.0 76-114 <br /> Toluene-d8(Surrogate) BQF1033 BQF1033-BS1 LCS 10.100 10.000 ug/L 101 88-110 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance ivith the chain of custody document. This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Page 23 of 30 <br /> 4100Atlas Court•Bakersfield,CA 93308 •(661)327-4911 •FAX(661)327-1918 •www.bclabs.com <br />