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Chesapeake Redwood City 94063 (650)364-9600 FAX(620) 384-9633 <br /> Sequoia '404 < <br /> 404 N Wiget Lane <br /> Walnut Creek CA 94598 (925)988-9600 FAX(925)98$ 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> IQF Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792 0342 <br /> is <br /> Blaine Tech Services, Inc Client Project ID Shell 6131 Pacific Ave <br /> 1680 Rogers Ave Matrix Liquid <br /> -- San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-183-02 Reported Aug 24, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO81998BTEX09A GC081998BTEX09A GCO81998BTEX09A GCO81998BTEX09A GC081998BTEX09A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method FAP 5030 EAP 5030 EAP 5030 EAP 5030 EAP 5030 <br /> Analyst C Westwater C Westwater C Westwater C Westwater C Westwater <br /> MS/MSD # 8080600 8080600 8080600 8080600 8080600 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 8/19/98 8/19/98 8/19/98 8/19/98 8/19/98 <br /> Analyzed Date 8/19/98 8/19/98 8/19/98 8/19/98 8/19/98 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 GCHP9 GCHP9 <br /> ConC Spiked 20pg/L 20pg/L 20pg/L 60pg/L 340pg/L <br /> Result 93 10 10 32 160 <br /> MS % Recovery. 47 50 50 - 53 67 <br /> Dup Result 19 21 21 65 230 <br /> MSD % R@COV 95 105 105 108 96 <br /> RPD 686 710 710 680 359 <br /> RPD-Limit 0-25 0-25 0-25 0-25 0-25 <br /> - _-- -- --- - LCS # --BLK081998=—----BLK081998— ----BLK081998 =- —=--- =- <br />