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�BC Laboratories, Inc " <br /> B C LABORATORIES <br /> QUALITY CONTROL REPORT <br /> Method 8260 <br /> TRC ALTON GEOSCIENCE Date of Report 09/10/2004 <br /> 21 TECHNOLOGY DRIVE Sample Matrix Groundwater <br /> IRVINE CA 92618 2302 QC Batch ID 200409154-20*8260 <br /> ANJU FARFAN <br /> Samples Affected 04 09154 20 <br /> 1� Method 1 ]Spike XRecJ PrecisionILCS % Rec <br /> �J J Blank I I MS I MSD ]Spike I LCS I Control I Control ] Control �J <br /> 11Constituents I Readings JU m is 1% Rec 1X Rec IR P D IX Rec J Limits J Limits I Limits J� <br /> i < 0 5 lug/L 1101 1 97 1 4 <br /> �JBenzene 1 1102 I 70 1301 201 70 1301 <br /> 11Toluene I < 0 5 Erg/L 1112 1108 1 4 1109 1 70 1301 201 70 130IJ <br /> • <br /> MS = Matrix Spike MSD = Matrix Spike Duplicate RPD = Relative Percent Difference <br /> LCS = Laboratory Control Sample <br /> Quality Control Officer <br /> -u <br /> Oa ette Bohm <br /> All results listed in this report are for the exclusive use of the submstttng parry BC Laborarones Inc assumes no responsibihty for report alteration separation detachmenr or third parry mterpretauon <br /> 4100 Atlas Court• Bakersfield, CA 93308 • (661) 327-4911 • FAX(661) 327-1918 •wwwbclabs com <br />