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ZDLaboratories Ic. i <br /> � Environmental Testing Laboratory Since 1949 <br /> Herst Associates Project: NCYC Reported: 05/14/2008 10:26 <br /> 4630 South Highway 94 North Outer Road Project Number: [none] <br /> Saint Charles,MO 63304 Project Manager: David Vasbinder <br /> Volatile Organic Analysis (EPA Method260) <br /> Quality Control Report - Laboratory Control sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID OC Type Result Level PQL Units Recovery RPI] Recovery RPD Lab Quals <br /> Benzene BRE0661 BRE0661-BSI LCS 24.840 25.000 0.50 ug/L 99.4 70 130 <br /> -- <br /> Bromodichloromethane BRE0661 BRE0661-BSI LCS 26.530 25.000 0.50 uglL 106 70-130 <br /> -------------- <br /> 70-130 <br /> Chlorobenzene BRE0661 BRE0661-BS1 LCS 28.320 25.000 0.50 ug/L 11 <br /> Chloroethane BRE0661 BRE0661-BS1 LCS 24.490 25.000 0.50 ug/L 98A -- .130 <br /> _— <br /> 1,4-Dichlorobenzene BRE0661 BRE0661-BSI LCS 28.720 25,000 0.50 uglL..___.115 _____.... 74 <br /> __..— <br /> 1,1-Dichlaroethane BRE0661 BRE0661-BSI LCS 25.520 25.000 0.50 ug/L 102 70-130 .- <br /> -. ... <br /> — -- -- <br /> 30 <br /> 1,1-Dichloroethene BRE0661 BRE0661-BSI LCS 26.650 25.000 050 ug/L 107 ..__. ._._....._ —.... <br /> - — 25 650 25.000 0.50 ug/L 103 70-130 <br /> Toluene BRE0661 BRE0661-BS1 LCS <br /> Trichloroethene BRE0661 BRE0661-BSI LCS 27.440 25.000 0.50 ug/L 110 <br /> _ - <br /> 1,2-Dichloroethane-d4(Surrogate) BRE0661 BRE0661-BS1 LCS 9.7700 10.000 ug/L 97.7 .-_ ...... <br /> Toluene-d8(Surrogate) BRE0661 BRE0661-BS1 LCS 9.8900 10.000 ug/L - 98.9 <br /> _- ............__ <br /> — —___— <br /> 86-115 <br /> 4-Bromofluorobenzene(Surrogate) BRE0661 BRE0661-BSI LCS 10.800 10.000 . 108 <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. page 32 of 36 <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com <br />