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LABORATORIES, INC. <br /> Herst Associates Project: NCYC Reported: 03/20/2008 12:48 <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 Method 8260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC T Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> Benzene BRC0903 BRC0903-BSI LCS 27.560 25,000 0.50 ug/L 110 70-130 <br /> Bromodichloromethane BRC0903 BRC0903-BS1 LCS 27.040 25,000 0.50 ug/L 108 70-130 <br /> —1-.1.11.11........... <br /> Chlorobenzene BRC0903 BRC0903-BSI LCS 27,180 25,000 0.50 ug/L 109 70-130 <br /> Chloroethane BRC0903 BRC0903-BSI LCS 28.630 25.000 0.50 ug/L 115 70-130 <br /> ---.--................ ---------- --——--------------------------------- ...... ---—---------------- <br /> 1,4-Dichlorobenzene BRC0903 BRC0903-BSI LCS 26.190 25.000 0.50 ug/L 105 70-130 <br /> ——----------------- ---------------- ......... --—---------- -—--------- ---------- ------------------------------ <br /> 1,1-Dichloroethane BRC0903 BRC0903-BSI LCS 28.430 25.000 0.50 ug/L 114 70-130 <br /> -- <br /> -—---- <br /> -........... ........... --—------ <br /> 1,1-Dichloroethene BRC0903 BRC0903-BSI LCS 27.970 25.000 0.50 ug/L 112 70-130 <br /> ----__...—__..-------_-._.------BRC0903 <br /> ----- ----------- ---—----------------------- _----------------- <br /> -- <br /> Toluene BRC0903 BRC0903-BSI LCS..... <br /> CS 27.900 25.000 0.50 uglL 112 70-130 <br /> ---.............. ....... ------------------ ------- ---------------------------- <br /> Trichloroethene BRC0903 BRC0903-BS1 LCS 26.020 25.000 0.50 ugJL 104 70-130 <br /> -111.1 - I--....................... ....... ..... ....... ...... ......................... <br /> 1,2-Dichloroethane-d4(Surrogate) BRC0903 BRC0903-BS1 LCS 10.380 10.000 ugJL 104 76-114 <br /> .. ...............---------- ............. ----------- <br /> Toluene-d8(Surrogate) BRC0903 BRC0903-BS1 LCS 10.240 10.000 ug/L 102 88-110 <br /> ---—-------- ....... ..........-------- --------------------------- <br /> 4-Bromofluorobenzene(Surrogate) BRC0903 BRC0903-BS1 LCS 10.090 10.000 ug/L 101 86-115 <br /> .......... ...... ......................... ........... <br /> BC Laboratories 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 parry interpretation. Page 34 of 38 <br /> 4100 Atlas Court-Bakersfield,CA 93303 -(661)327-4911.-FAX(661)327-1918 -www.bclabs.com <br />