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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wage,Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9t6)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 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-188-16-17 Reported Aug 20, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Methanol Ethanol Iso-Propanol <br /> QC Batch# GCo803981SHSHSS GC0803981SHSHSB GC0803981SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD#. 9807HS502 9807HB502 9807HS502 <br /> Sample Cone - N D IN D N D <br /> Prepared Date 7/31/98 7/31/98 7/31/98 <br /> Analyzed Date. 7/31/98 7/31/98 7/31/98 <br /> Instrument I D #• GCv1 GCvi GCv1 <br /> Cone Spiked. 8 0 mg/L 8 a mg/L 8 0 mg/L <br /> Result 87 10 11 <br /> MS % Recovery 109 125 138 <br /> Dup Result 90 10 11 <br /> MSD % Recov 113 125 138 <br /> RPD 34 00 00 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK080398 BLK080398 BLK080398 <br /> Prepared Date 8/3/98 8/3/98 8/3/98 <br /> Analyzed Date 8/3/98 8/3/98 8/3/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 8 3 90 95 <br /> LCS % Recov 104 113 119 <br /> I <br /> 50-150 50-150 50-150 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS 1s a control sample of known,interferent-fres 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 H <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 /> Jole <br /> er <br /> ager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9807H87 BLA <13> <br />