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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)988-9673 <br /> 6) Analytical Sig Striker Avenue Suite$ Petaluma.C 9 954 (906)922-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1$65 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> ,San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-187-07 Reported Aug 20, 1998 <br /> QUALIT-Y—C-ONTROL-DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanci <br /> QC Batch# GCO806981SHSHSB GC0806981SHSHSB GCO8069SISHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD # 9807H8816 9807H8816 9807HS816 <br /> Sample Conc. N D IN D N D <br /> Prepared Date 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date 8/6/98 8/6/98 8/6/98 <br /> Instrument I D #* GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 88 98 10 <br /> MS % Recovery 110 123 125 <br /> Dup Result 82 92 99 <br /> MSD % Recov 103 115 124 <br /> RPD 71 63 10 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS # BLK080698 BLK080698 BLK080698 <br /> Prepared Date 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date 8/6/98 8/6/98 8/6/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 7 9 89 93 <br /> LCS % Recov 99 111 116 <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> JPegyThe LCS is a control sample of known,Interferent-free matrix that is analyzed using the same reagents, <br /> NALYTICAL 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 /> nner <br /> anager '*MS=Matrix Spike, MSD=IVIS Duplicate, RPD=Relative%Difference 9807H87 BLA <2> <br />