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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 06/29/2009 15:28 <br /> 4630 South Highway 94 North Outer Road Project Number: Monthly <br /> Saint Charles, MO 63304 Project Manager: Erin Fanning <br /> Volatile Organic Analysis {EPA Method 8260} <br /> Quality Control Repo - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD_ Recovery Lab Qualls <br /> Benzene BSF1839 Matrix Spike 0908251-01 0 27,190 25.000 ug/L 109 70. 130 <br /> Matrix Spike Duplicate 0908251-01 0 26.780 25.000 ug/L 1.9 107 20 70-130 <br /> Bromodichloromethane BSF1839 Matrix Spike 0908251-01 0 25.940 25.000 ug/L 104 70-130 <br /> Matrix Spike Duplicate 0908251-01 0 25.140 25.000 ug/L 2.9 101 20 70-130 <br /> Chlorobenzene BSF1839 Matrix Spike 0908251-01 0 27.140 25.000 ug/L 109 70-130 <br /> Matrix Spike Duplicate 0908251-01 0 24.710 25.000 ug/L 9.8 98.8 20 70-130 <br /> Chloroethane -- BSF1839 Matrix Spike 0908251-01 0 30.780 25.000 ug/L 123 70-130 <br /> Matrix Duplicate S ike0908251-01 0 30.360 25.000 ug/L 1.6 121 20 70-130 <br /> Spike <br /> 1,4-Dichlorobenzene BSF1839 Matrix Spike 0908251-01 0 28.640 25.000 ug/L 115 70-130 <br /> Matrix Spike Duplicate0908251-01 0 26.800 25.000 ug/L 7.2 107 20 70-130 <br /> 1,1-Dichloroethane BSF1839 Matrix Spike 0908251-01 0.16000 23.370 25.000 ug/L 92.8 70-130 <br /> Matrix Spike Duplicate 0908251-01 0.16000 23.120 25.000 ug/L 1.1 91.8 20 70-130 <br /> 1,1-Dichloroethene BSF1839 Matrix Spike 0908251-01 0 26.450 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0908251-01 --0 -26.260 25.000 ug/L- 0.9 - 105 -20 70-130 <br /> Toluene - --- BSF1839 Matrix Spike ---0908251-01 0 25.690 25.000 uglL 103 70-130 <br /> Matrix Spike Duplicate 0908251-01 0 25.410 25.000^ ug/L - 1.0 --- 102 - 20 70-130 - -- <br /> Trichloroethene .-' _ BSF1839 Matrix Spike- -0908251-01 0.38000 24.660 25.000 ug/L 97.1 70-130 <br /> Matrix Spike Duplicate 0908251-01 0.38000 23.760 25.000 ug/L 3.8 93.5 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSF1839 Matrix Spike W 0908251-01 ND 10.510 10.000 ug/L 105 76-114 <br /> Matrix Spike Duplicate 0908251-01 ND 10.470 10.000 ug/L 105 76-114 <br /> Toluene-d8(Surrogate) BSF1839 Matra Spike 0908251-01 ND 9.8600 10.000 ug/L 98.6 <br /> 88-110 <br /> Matrix Spike Duplicate 0908251-01 ND 9.7600 10.000 ug/L 97.6 88-110 <br /> 4-Brornofluorobenzene(Surrogate) �BSF1839 Matrix Spike 0908251-01 ND 10.810 10.000 ug/L 108 86-115 <br /> Matra Spike Duplicate 0908251-01 ND 10.060 10.000 ug/L 101 86-115 <br /> 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 waty. BC laboratories,Inc.assumes no responsibility for report alteration,separation,detachment or third party intem vtation. <br /> 4100 Atlas Court Bakersfield,CA, 93308 (661)327-4911 FAX(661)327-1918 www.bc#abs.com Page 31 of 36 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />