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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 01/11/2010 16:10 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: Erin Fanning <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - 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 Quals <br /> Chlorobenzene BSL1778 Matrix Spike 0915623-93 ND 24.730 25.000 ug/L 98.9 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 24.550 25.000 ug/L 0.7 98.2 20 70-130 <br /> Chloroethane BSL1778 Matrix Spike 0915623-93 ND 28.610 25.000 ug/L 114 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 28.410 25.000 ug/L 0.7 114 20 70-130 <br /> 1,4-Dichlorobenzene BSL1778 Matrix Spike 0915623-93 ND 25.090 25.000 ug/L 100 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 23.840 25.000 ug/L 5.1 95.4 20 70-130 <br /> 1,1-Dichloroethane BSL1778 Matrix Spike 0915623-93 ND 29.780 25.000 ug/L 119 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 29.650 25.000 ug/L 0.4 119 20 70-130 <br /> 1,1-Dichloroethene BSL1778 Matrix Spike 0915623-93 ND 31.330 25.000 ug/L 125 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 31.500 25.000 ug/L 0.5 126 20 70-130 <br /> Toluene BSL1778 Matrix Spike 0915623-93 ND 25.000 25.000 ug/L 100 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 24.790 25.000 ug/L 0.8 99.2 20 70-130 <br /> Trichloroethene SSL1778 Matrix Spike 0915623-93 ND 27.090 25.000 ug/L 108 70-130 <br /> Matrix Spike Duplicate 0915623-93 ND 26.530 25.000 ug/L 2.1 106 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSL1778 Matrix Spike 0915623-93 ND 10.470 10.000 ug/L 105 76-114 <br /> Matrix Spike Duplicate 0915623-93 ND 10.630 10.000 ug/L 106 76-114 <br /> Toluene-d8(Surrogate) BSL1778 Matrix Spike 0915623-93 ND 10.060 10.000 ug/L 101 88-110 <br /> Matrix Spike Duplicate 0915623-93 ND 9.9900 10.000 ug/L 99.9 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BSL1778 Matrix Spike 0915623-93 ND 10.250 10.000 ug/L 102 86-115 <br /> Matrix Spike Duplicate 0915623-93 ND 10.150 10.000 ug/L 102 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 he reproduced in its entirety. <br /> 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. <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 33 of 44 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />