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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: Austin Road/NCYCC Drilling Reported: 12/19/2008 13:17 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager. Dad Vasbinder <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike iPercent Percent <br /> Constituent Batch ID QC Sample lypq Sample ID Result Result Added Units RPD Recovery RPB Recovery Lab Quals <br /> Benzene BRL0791 Matrix Spike 0816127-01 ND 25.320 25.000 ug/L 101 70--130 <br /> Matrix Spike Duplicate 0816127-01 ND 25.670 25.000 ug/L 2.0 103 20 70-130 <br /> Bromodichloromethane BRL0791 Matrix Spike 0816127-01 ND 31.530 25.000 ug/L 126 70-130 <br /> Matrix Spike Duplicate0816127-01 ND 32.490 25.000 ug/L 3.1 130 20 70-130 <br /> Chlorobenzene BRL0791 Matrix Spike 0816127-01 ND 30.340 25.000 ug/L 121 70-130 <br /> Matrix Spike Duplicate0816127-01 ND 29.890 25.000 ug/L 0.8 120 20 70-130 <br /> Chloroethane BRL0791 Matrix Spike 0816127-01 ND 28.180 25.000 ug/L 113 70-130 <br /> Matrix Spike Duplicate0816127-01 ND 28.800 25.000 ug/L 1.8 115 20 70-130 <br /> 1,4-Dichlorobenzene BRL0791 Matrix Spike 0816127-01 ND 30.030 25.000 ug/L 120 70-130 <br /> Matrix Spike Duplicate0816127-01 ND 30.190 25.000 ug/L 0.8 121 20 70-130 <br /> 1,1-Dichloroethane BRL0791 Matrix Spike 0816127-01 ND 26.630 25.000 ug/L 107 70-130 <br /> Matra Spike Dupticate0816127-01 ND 26.830 25.000 ug/L 0 107 20 70-130 <br /> 1,1-Dichloroethene BRL0791 Matrix Spike 0816127-01 ND 30.890 25.000 ug/L 124 70-130 <br /> Matrix Spike Dupticate0816127-01 ND 29.940 25.000 ug/L 3.3 120 20 70-130 <br /> Toluene BRL0791 Matra Spike 0816127-01 ND 29.120 25.000 ug/L 116 70-130 <br /> Matrix Spike 0uplicate0816127-01 ND 29.590 25.000 ug/L 1.7 118 20 70-130 <br /> Trichloroethene BRL0791 Matrix Spike 0816127-01 ND 26.850 25,000 ug/L 107 70-130 <br /> Matrix Spike Duplicate0816127-01 ND 27.060 25.000 ug/L 0.9 108 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BRL0791 Matrix Spike 0816127-01 ND 9.8200 10.000 ug/L 98.2 76-114 <br /> Matrix Spike 0uplicate0816127-01 ND 9.4600 10.000 ug/L 94.6 76-114 <br /> -- ----- - -- -- _ - - <br /> Toluene-d8(Surrogate) BRL0791 Matrix Spike 0816127-01 ND 10.110 10.000 ug/L 101 88-110 <br /> Matrix Spike Duplicate0816127-01 ND 10.150 10.000 ug/L 102 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BRL0791 Matrix Spike 0816127-01 ND 10.400 10.000 ug/L 104 86-115 <br /> Matrix Spike Du plicate 0 81 61 27-01 ND 9.5900 10.000 ug/L 95.9 86-115 <br /> The results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report roust be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party. HC Laboratories assumes no responsibility for report alteration,separation,detachment or third party interpretation. <br /> 4100 Atlas Court Bakersfield,CA 93308 (667 4911 FAX(661)327-1918 www.bciabs.com ge 25 of 54 <br /> Certifications: California-ELAP Certification N 1186; Nevada Administrative Code-NAC-445A <br />