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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 02/12/2009 13:44 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic I (EPA Method 8264) <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 Recove Lab Quals <br /> Benzene BSB0772 Matrix Spike 0901769-01 0 24.410 25-000 ug/L 97.6 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 24.870 25.000 ug/L _ 1.9 - 99.5 20 70-130 -� <br /> Bromadichloromethane BSB0772 Matrix Spike 0901769-01 0 27.840 25.000 ug/L 111 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 27.840 25.000 ug/L 0 111 20 70-130 <br /> Chlorobenzene BSB0772 Matrix Spike 0901769-01 0 25.580 25.000 ug/L 102 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 26.490 25.000 uglL 3.8 106 20 70-130 <br /> Chloroethane BSB0772 Matrix Spike 0901769-01 0 25.660 25.000 ug/L 103 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 27.010 25.000 ug/L 4.7 108 20 70-130 <br /> 1,4-Dichlorobenzene BSB0772 Matrix Spike 0901769-01 0 26.460 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 27.510 25.000 ug/L 3.7 110 20 70-130 <br /> 1,1-Dichloroethane BSB0772 Matrix Spike 0901769-01 0.40000 25.150 25.000 ug/L 99.0 70-130 <br /> Matrix Spike Duplicate 0901769.01 0.40000 25.070 25.000 ug/L 0.3 98.7 20 70-1130 <br /> 1,1-Dichloroethene BSB0772 Matrix Spike 0901769-01 0-23000 26.850 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0901769-01 0.23000 27450 25.000 ug/L 2.8 109 20 70-130 <br /> Toluene BSB0772 Matrix Spike 0901769-01 0 26.900 25.000 ug/L 108 70-130 <br /> Matrix Spike Duplicate 0901769-01 0 26.950 25.000 ug/L 0 108 20 70-130 <br /> Trlchioroethene BSB0772 Matrix Spike 0901769-01 1.4900 28.070 25.000 ug/L 106 70-130 <br /> Matrix Spike Duplicate 0901769-01 1.4900 27.720 25.000 ug/L 0.9 105 20 70-130 <br /> -._.._-. -._......_...._......... <br /> __ <br /> 1,2-Dichloroethane-d4(Surrogate) BSB0772 Matrix Spike 0901769-01 ND 10.360 10.000 ug/L 104 76-114 <br /> Matrix Spike Duplicate 0901769-01 ND _ 9.9200 10-000 ug/L -� 99.2 J 76--114 <br /> Toluene-d8(Surrogate) BSB0772 Matrix Spike 0901769-01 ND 10.310 10.000 ug/L 103 88-110 <br /> Matrix Spike Duplicate,0901769-01 ND 10.240 10.000 ug/L 102 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BS80772 Matrix Spike 0901769-01 ND 10.170 10.000 ug/L 102 86-115 <br /> Matrix Spike Duplicate 0901769-01 ND 10.530 10.000 ug/L - -- 105 _ -- 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 die exclusive use of the submitting party. BC Laboratories,Inc.assumes no responsibility for report alteration,separation,detachment or third party interpretation. Page 31 of 36 <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bc[abs.com g <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />