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Sequoia 680 Chesapeake Drive Redwood C+t1 CA 94063 (415) 364 9600 FAa (415) 364 9233 <br /> (D- 404 N Wiget lane1Ylalnut Creel, CA 94598 {510) 9S8 9600 FAX {5W)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 45834 (916) 921 9600 FAX (916)92t 0100 <br /> Pacific Environmental Group Client Project ID 310-040 5A/2859, Stockton <br /> 2025 Gateway Place, Suite 440 <br /> San Jose, CA 95110 <br /> Attention Andrew Lehane Work Order# 9602836 01, 02 Reported Feb 16, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO21495BTEX17A GCO21496STEX17A GCO21496BTEX17A GCD21496BTEX17A <br /> Analy Method EPA 6020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J Woo J Woo <br /> MS/MSD # 960207712 960207712 96D207712 960207712 <br /> Sample Cone N a N D N D N D <br /> Prepared Date 2/14/96 2/14/96 2/14/95 2/14/96 <br /> Analyzed Date 2/14/96 2/14/96 2/14/96 2/14/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 1Dug/L 10119/L 10,u9/L 30yg/L <br /> Result i1 11 11 33 <br /> MS % Recovery 110 110 110 110 <br /> • Dup Result 12 12 12 36 <br /> MSD % Recov 120 120 120 120 <br /> RPD 87 87 87 67 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # BLK021496 BLK021496 BLK021496 BLK021496 <br /> Prepared Date 2/14/96 2/14/96 2/14/95 2/14/96 <br /> Analyzed Date 2/14/96 2/14/96 2/14/96 2/14/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cork Spiked 10pg/L 1011g/L 10119/L 3011g/L <br /> LCS Result 12 11 11 34 <br /> LCS % Recov 120 110 110 113 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> �EQUQIA ANALYTIC L ` preparation,and analytical methods employed for the samples The matrix spike is an allouct of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure if <br /> �u recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery 1s to be used to validate the batch <br /> Claudia Hlrotsu <br /> Project Manager "MS=Matrix Spike,MSD=MS Dupimate RPD=Relative Difference 9602836 PPP <1> <br />