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J� a Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <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# 98071-183-03-05 Reported Aug 24, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO80698BTEX02A GC08069813TEX02A GCO80698BTEX02A GCO80698BTEK02A GCO80698BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EAP 5030 EAP 5030 EAP 5030 EAP 5030 EAP 5030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8072219 8072219 8072219 8072219 8072219 <br /> Sample Conic N D N D N D N D N D <br /> Prepared Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Instrument I D #' GCHP2 GCHP2 GCHP2 GCHP2 - GCHP2 <br /> Conc Spiked 20 ftg/L 20 pg/L 20yg/L 60 Ng/L 340 ug/L <br /> Result 24 23 20 65 330 <br /> MS % Recovery 120 115 100 108 94 <br /> ISMDup Result 20 19 17 55 300 <br /> SD % Recov. 100 95 85 92 86 <br /> 4 <br /> RPD 18 19 16 17 95 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK080698 BLK080698 BLK080698 BLK080698 BLK080698 <br /> Prepared Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date: 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 20ug/L 20 pg/L 20 ug/L 60 Ng/L 340 erg/L <br /> LCS Result 18 18 19 55 330 <br /> LCS % Recov 90 90 95 92 94 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Lrmtts <br /> Please Note <br /> JgyTho LCS is a control sample of known,mnterferent-free matrix that is analyzed using*he sage reagen+s, <br /> LYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> rger **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative % Difference 9807H83 BLA <6> <br /> "�t'l <br />