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LABORATORIES, INC. <br /> Herst Associates Project: NCYC Reported: 02/01/2008 12:10 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> Volatile Orrianic 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 BRA1017 BRA1017-BS1 LCS 25.460 25.000 0.50 ug/L 102 70-130 <br /> Bromodichloromethane BRA1017 BRA1017-BS1 LCS 26.180 25.000 0.50 ug/L 105 70-130 <br /> Chlorobenzene BRA1017 BRA1017-BS1 LCS 24.350 25.000 0.50 ug/L 97.4 70-130 <br /> Chloroethane BRA1017 BRA1017-BS1 LCS 30.290 25.000 0.50 ug/L 121 70-130 <br /> 1,4-Dichlorobenzene BRA1017 BRA1017-BS1 LCS 22.760 25.000 0.50 ug/L 91.0 70- 130 <br /> 1,1-Dichloroethane BRA1017 BRA1017-BS1 LCS 25.480 25.000 0.50 ug/L 102 70-130 <br /> 1,1-Dichloroethene BRA1017 BRA1017-BSI LCS 26.790 25.000 0.50 ug/L 107 70-130 <br /> Toluene BRA1017 BRA1017-BS1 LCS 25.340 25.000 0.50 ug/L 101 70-130 <br /> Trichloroethene BRA1017 BRA1017-BSI LCS 26.010 25.000 0.50 ug/L 104 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BRA1017 BRA1017-BSI LCS 10.700 10.000 ug/L 107 76-114 <br /> Toluene-d8(Surrogate) BRA1017 BRA1017-BS1 LCS 10.060 10.000 ug/L 101 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BRA1017 BRA1017-BSI LCS 9.7100 10.000 ug/L 97.1 86-115 <br /> Benzene BRA1087 BRA1087-BS1 LCS 28.600 25.000 0.50 ug/L 114 70-130 <br /> Bromodichloromethane BRA1087 BRA1087-BS1 LCS 27.370 25.000 0.50 ug/L 109 70-130 <br /> Chlorobenzene BRA1087 BRA1087-BSI LCS 25.490 25.000 0.50 ug/L 102 70-130 <br /> Chloroethane BRA1087 BRA1087-BSI LCS 32.470 25.000 0.50 ug/L 130 70-130 <br /> 1,4-Dichlorobenzene BRA1087 BRA1087-BS1 LCS 22.680 25.000 0.50 ug/L 90.7 70-130 <br /> 1,1-Dichloroethane BRA1087 BRA1087-BS1 LCS 29.010 25.000 0.50 ug/L 116 70-130 <br /> 1,1-Dichloroethene BRA1087 BRA1087-BSI LCS 30.890 25.000 0.50 ug/L 124 70-130 <br /> Toluene BRA1087 BRA1087-BSI LCS 26.640 25.000 0.50 ug/L 107 70-130 <br /> Trichloroethene BRA1087 BRA1087-BSI LCS 27.300 25.000 0.50 ug/L 109 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BRA1087 BRA1087-BS1 LCS 11.400 10.000 ug/L 114 76-114 <br /> Toluene-d8(Surrogate) BRA1087 BRA1087-BS1 LCS 10.390 10.000 ug/L 104 88-110 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with 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.HC Laboratories,Inc.assumes no responsibility for report alteration,separation, detachment or third party interpretation. Page 33 of 43 <br /> 4100 Atlas Court•Bakersfield,CA 93308 •(661)327-4911 •FAX(661)327-1918•www.bclabs.com <br />