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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9133 <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 /> Iwo Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> Tech Services Inc Client <br /> Blaine Tec Project ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9810737-04, 9810741-1 0, Reported Nov 3, 1998 <br /> 9810742-14_17 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GC1014981SHSHSB GC1014981SHSHSB GC10149818HSHSB <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 Conic N D Nb N D <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 GCvi 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 0-50 <br /> LCS # LC8101498 LC8101498 LCS101498 <br /> Prepared Date 10/14/98 10/14/98 10/14/98 <br /> Analyzed Date 10/14/98 10/14/98 10/14/98 <br /> Instrument I D # GCv1 GCv1 GCvi <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 77 90 88 <br /> LCS % Recov 96 113 110 <br /> 50-150 50-150 50-150 <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 /> 4eanager Al <br /> YTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> 0 <br /> fo 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 /> **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative% Difference 9810737 BLA <11 n <br /> C' <br />