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VC �, Laboratories, Inc <br /> TRC Alton Geoscience <br /> Project 6981 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 07108105 10 51 <br /> Volatile Organic Analysis (EPA Method 8264} <br /> I <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> Benzene BOG0008 BOG0008-BS1 LCS 22 600 25 000 0 50 uglL 904 70-130 <br /> Toluene BOG0008 BOG0008-BS1 LCS 24 200 25 000 0 50 uglL 968 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) 60G0008 BOG0008-BS1 LCS 10 580 10 000 uglL 106 76-114 <br /> Toluene-d8(Surrogate) BOG0008 BOG0008-BS1 LCS 99200 10 000 uglL 992 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BOG0008 BOG0008-BS1 LCS 98900 10 004 ug/L 989 86-115 <br /> Benzene _ BOG0077 BOG0077-BS1 LCS 22 060 25 000 0 50 ug1L <br /> 882 70- 130 <br /> Toluene BOG0077 BOG0077-BS1 LCS 22 180 25 000 050 ug1L 887 70-130 <br /> 1 2-Dichloroethane-d4(Surrogate) BOG0077 BOG0077-BS1 LCS 99000 10 000 ug1L 990 76-114 <br /> Toluene-0(Surrogate) BOG0077 BOG0077-BS1 LCS 97500 10 000 uglL 975 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BOG0077 BOG0077-BS1 LCS 98400 10 000 uglL 984 86-115 <br /> I <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 be repro ed in its entirely_ <br /> All results listed in this report are for the exclusive usr of the submunng parry IAC.Lahorerorres h nes no responstbtlurt y for repoalteritron sepirmon,derachmem or third parry imerpreraric � � <br /> 4100 Atlas Court• BakeisField, CA 93308 • (661#-4911 • FAX(661)327-1918 •wwwbclabs corn Page 41 af46 <br />