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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988x9673, <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> fWAnalytical 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 7910 Lower Sacramento <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9807H80 -01-05 Reported Aug 20, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch# GC080698802009A GC080698802009A GC080698802009A GCO80698802009A GCO80698802009A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA$030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 8072214 8072214 8072214 8072214 8072214 <br /> Sample Conc N D N D N D N D ND <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 # HP9 HP9 HP9 HP9 HP9 <br /> Conc, Spiked 20ug/L 20ug/L 20ug/L 60ug/L 240 ug/L <br /> Result 19 20 22 65 280 <br /> MS % Recovery 95 100 110 108 117 <br /> Dup Result 19 20 22 65 280 . <br /> MSD % Recov 95 100 110 108 117 <br /> RPD 00 00 00 00 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # LCS080698 LCS080698 LCS080698 LCS080698 LCS080698 <br /> Prepared Date 8/6/98 8/6/98 6/6/98 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 # HP9 HP9 HP9 HP9 HP9 <br /> Conc Spiked 20pg/L 20ug/L 20ug/L 60ug/L 240ug/L <br /> LCS Result 18 19 20 62 230 <br /> LCS % Recov 90 95 100 103 96 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Note <br /> SEQU A NALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the sam7reagents, <br /> Ela 127 preparation,and analytical methods employed for the samples The matrix spike is an aliquot mple <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> eg Penner <br /> P t Manager ""MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference 9807H80 BLA <1> <br />