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I <br /> B� Laboratories, Inc <br /> B C LABORATORIES <br /> QUALITY CONTROL REPORT <br /> TRC ALTON GEOSCIENCE Date of Report 09/16/2004 <br /> 21 TECHNOLOGY DRIVE Sample Matrix Groundwater <br /> IRVINE CA 92618-2302 QC Batch ID 200409154 1*8020 <br /> ANJU FARFAN <br /> Samples Affected 04 09154 1 04-09154 20 <br /> J Method i I ISpike XReci Precision�LCS X Rec <br /> Blank I MS I MSD (Spike J LCS I Control I Control ' Control <br /> IlConstituents I Readings iUm is 1% Rec 1% Rec IR P D 1% Rec I Limits I Limits I Limits 11 <br /> JIGasoline Range Organics I I I � <br /> (C4 C12) 1 X50 dug/L 1 95 1 97 1 2 1100 1 70 1301 201 85 11511 <br /> MS = Matrix Spike MSD = Matrix Spike Duplicate RPD = Relative Percent Difference <br /> LCS = Laboratory Control Sample <br /> Quality Control Off <br /> Danette Bohm <br /> r <br /> All results listed in this report aie for the exclusive use of the submitting party BC Labor tones Inc assumes no respomibiliry for report tlrerauon separation detaehmenr or third parry rrnterpre[arton <br /> 4100 Atlas Court• Bakersfield, CA 93308 • (661) 327-4911 • FAX(661) 327-1918 •wwwbclabs cosh <br />