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a- ) 680 Chesapeake Drive Redwood Ciry CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget Lane walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 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 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9810741-03-09, 11-12, 9810742-13 Reported NOV 3, 1998 <br /> QUALITY CONTROL. DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GC10139SISHSHSB GC1013981SHSHSB G01013981SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD # 981073702 981073702 981073702 <br /> Sample Conc ND ND ND <br /> Prepared Date 10/13/98 10/13/98 10/13/98 <br /> Analyzed Date 10/13/98 10/13/98 10/13/98 <br /> Instrument 1 D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 94 10 10 <br /> MS % Recovery/ 118 125 125 <br /> Dup Result 83 91 96 <br /> MSD % Recov 104 114 120 <br /> RPD 12 94 41 <br /> RPD Limit 0-50 0-50 050 <br /> LCS # LCS101398 LCS101398 LCS101398 <br /> Prepared Date 10/13/98 10/13/98 10/13/98 <br /> Analyzed Date 10/13/98 10/13/98 10/13/98 <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 95 95 10 <br /> LCS % Recov 119 119 125 <br /> 50-150 50-150 50150 <br /> LCS 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 /> I ANA YTICAL 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 recove of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> inters e,the LCS recovery is to be used to validate the batch <br /> Pe gy e r <br /> Pro c Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9810737 BLA <12> <br />