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® LABORATORIES, INC. Herst Associates Project: NCYC Reported: 02/01/2008 12:10 4630 South Highway 94 North Outer Road Project Number: [none] Saint Charles, MO 63304 Project Manager: David Vasbinder Volatile Organic Analysis (EPA Method 8260) Quality Control Repo r Precision & Accuracy Control Limits Source Source Spike Percent Percent Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Lab Quals Benzene BRA1017 Matrix Spike 0800756-01 0 25.590 25.000 ug/L 102 70-130 Matrix Spike Duplicate 0800756-01 0 25.720 25.000 ug/L 1.0 103 20 70- 130 Bromodichloromethane BRA1017 Matrix Spike 0800756-01 0 25.760 25.000 ug/L 103 70-130 Matrix Spike Duplicate0800756-01 0 26.510 25.000 ug/L 2.9 106 20 70-130 Chlorobenzene BRA1017 Matrix Spike 0800756-01 0 24.690 25.000 ug/L 98.8 70-130 Matrix Spike Duplicate 0800756-01 0 25.270 25.000 ug/L 2.2 101 20 70-130 Chloroethane BRA1017 Matrix Spike 0800756-01 0 30.720 25.000 ug/L 123 70-130 Matrix Spike Duplicate0800756-01 0 30.470 25.000 ug/L 0.8 122 20 70-130 1,4-Dichlorobenzene BRA1017 Matrix Spike 0800756-01 0 23.250 25.000 ug/L 93.0 70- 130 Matrix Spike Duplicate 0800756-01 0 23.300 25.000 ug/L 0.2 93.2 20 70-130 1,1-Dichloroethane BRA1017 Matrix Spike 0800756-01 0 25.450 25.000 ug/L 102 70-130 Matrix Spike Duplicate 0800756-01 0 25.690 25.000 ug/L 1.0 103 20 70-130 1,1-Dichloroethene BRA1017 Matrix Spike 0800756-01 0 26.860 25.000 ug/L 107 70-130 Matrix Spike Duplicate 0800756-01 0 26.860 25.000 ug/L 0 107 20 70-130 Toluene BRA1017 Matrix Spike 0800756-01 0 25.390 25.000 ug/L 102 70:130 Matrix Spike Duplicate 0800756-01 0 25.830 25.000 ug/L 1.0 103 20 70- 130 Trichloroethene BRA1017 Matrix Spike 0800756-01 0 25.500 25.000 ug/L 102 70-130 Matrix Spike Duplicate 0800756-01 0 25.870 25.000 ug/L 1.0 103 20 70-130 1,2-Dichloroethane-d4(Surrogate) BRA1017 Matrix Spike 0800756-01 ND 10.500 10.000 ug/L 105 76- 114 Matrix Spike Duplicate 0800756-01 ND 10.570 10.000 ug/L 106 76-114 Toluene-d8(Surrogate) BRA1017 Matrix Spike 0800756-01 ND 9.9200 10.000 ug/L 99.2 88- 110 Matrix Spike Duplicate 0800756-01 ND 10.060 10.000 ug/L 101 88-110 4-Bromofluorobenzene(Surrogate) BRA1017 Matrix Spike 0800756-01 ND 9.6900 10.000 ug/L 96.9 86- 115 Matrix Spike Duplicate 0800756-01 ND 9.5400 10.000 ug/L 95.4 86-115 Benzene BRA1087 Matrix Spike 0800932-06 0 28.710 25.000 ug/L 115 70- 130 Matrix Spike Duplicate 0800932-06 0 28.940 25.000 ug/L 0.9 116 20 70- 130 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. 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 30 of 43 4100 Atlas Court•Bakersfield,CA 93308•(661)327-4911 •FAX(661)327-1918 •www.betabs.com