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Laboratories Inc. i <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 09/12/2008 11:00 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYCC VOC Samples <br /> Saint Charles,MO 63304 Project Manager. David Vasbinder <br /> Volatile Organic I i (EPA Method 8260) <br /> Quality Control Repo - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Typ2 Sample ID Result Result Added Units RPD RecoMM RPD Recovea Lab Quals <br /> Benzene BR10710 Matrix Spike 0811964-01 0 22.530 25.000 ug/L 90.1 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 23.340 25.000 ug/L 3.6 93.4 20 70-130 <br /> Bromodichloromethane BR10710 Matrix Spike 0811964-01 0 28.210 25.000 uglL 113 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 28.140 25.000 ug/L 0 113 20 70-130 <br /> Chlorobellzene BRIO710 Matrix Spike 0811964-01 0 27.540 25.000 ug/L 110 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 26.820 25.000 ug/L 2.8 107 20 70-130 <br /> Chloroethane BRIO710 Matrix Spike 0811964-01 0 22.590 25.000 ug/L 90.4 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 23.110 25.000 ug/L 2.2 92.4 20 70-130 <br /> 1,4-Dichlorobenzene BR10710 Matrix Spike 081196401 0 27.240 25.000 ug/L 109 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 26.150 25.000 ug/L 3.7 105 20 70-130 <br /> 1,1-Dichloroethane BR10710 Matrix Spike 0811964-01 0 23.650 25.000 ug/L 94.6 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 23.900 25.000 ug/L 1.1 95.6 20 70-130 <br /> 1,1-Dichloroethene BR10710 Matrix Spike 0811964-01 0 28.170 25.000 ug/L 113 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 28.370 25.000 ug/L 0 113 20 70-130 <br /> Toluene BR10710 Matrix Spike 0811964-0/ 0 26.480 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 25.880 25.000 ug/L 1.9 104 20 70-130 <br /> Trichloroethene BRIO710 Matrix Spike 0811964-01 0 24.970 25.000 ug/L 99.9 70-130 <br /> Matrix Spike Duplicate 0811964-01 0 25.250 25.000 ug/L 1.1 101 20 70-130 <br /> 1,2-Dichiornethane-d4(Surrogate) BR10710 Matrix Spike 0811964-01 NO 10.570 10.000 ug/L 106 76-114 <br /> Matrix Spike Duplicate0811964-01 NO 9.7700 10.000 ug/L 97.7 76-114 <br /> Toluene-d8(Surrogate) BR10710 Matrix Spike 0811964-01 NO 10.070 10.000 ug/L 101 88-110 <br /> Matrix Spike Duplicate 0811964-01 NO 10.110 10.000 ug/L 101 88-110 <br /> 4-Bromofluarobenzene(Surrogate) BRIO710 Matrix Spike 0811964-01 ND 10.980 10.000 ug1L 110 86-115 <br /> Matrix Spike Duplicate 0811964-01 NO 10.260 10.000 ug/L 103 86-115 <br /> "the results in this report apply to the samples analyzed in accordance with the chain of cavody document.Ais analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting panv. AC Laboratories.Inc.assumes no responsibility for report alteration,separation,detachment or third pari interprelaliun. <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)3274911 FAX(661)327-1918 www.bclabs.com Page 31 of 36 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />