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Entech Analytical Labs Inca <br /> 334 Victor Court , Santa Clara, CA 95054 Phone, (408) 588-0200 l=ax: (408) 588-0201 <br />' Quality Control - Laboratory Control Spike / Duplicate Results <br /> Liquid <br />' Reviewed by JHSIANG-10/07/04 QC Batch ID WGC4041001 <br /> Analysts Date 10/1/2004 <br /> LCS Method EPA 8020 Cone Units ug/L <br /> Parameter Blank Spike Amt SpikeResult QC Type Analysis Date %Recovery RPD RPD Limits Recovery Limits <br /> Benzene <0 5 800 7 87 LCS 10/1/2004 984 65- 135 <br />' Ethyl Benzene <0 5 800 8 80 LCS 10///2004 110 65-135 <br /> Toluene <0 5 800 7 97 LCS 10/1/2004 996 65-135 <br /> Xylenes,total <1 240 274 LCS 10/1/2004 114 65-135 <br /> t Surrogate %Recovery Control Limits <br /> 4-Bromotluorobenzene 144 65 - 135 <br />' LCSD Method EPA 8020 Cone Units µg/L <br /> Parameter Blank Spike Amt SpikeResult QC Type Analysis Date %Recovery RPD RPD Limits Recovery Limits <br /> Benzene <0 5 800 790 LCSD 10/1/2004 998 0 4 25 65- 135 <br /> Ethyl Benzene <0 5 Soo 8 53 LCSD 10/l/2004 107 31 25 65-135 <br /> Toluene <0 5 800 762 LCSD 10/1/2004 953 45 25 65- 135 <br /> Xylenes,total <1 240 266 LCSD 10/1/2004 111 3 0 25 65- 135 <br /> Surrogate %Recovery Control Limits <br /> �4-Bromolluorobenzene 1D9 65 - 135 <br /> 1 <br /> QCReport-1glantz-10/14/2004 12 04 49 AM <br />