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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 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 Pr'o]ect ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-188-15, 18, 9807H89-22-24 Reported Aug 20, 1998 <br /> QUALITY CONTROL-DATA REPORT <br /> i <br /> Analyte Methanol Ethanol Iso-Propanol <br /> I <br /> QC Batch# GCO804981SHSHSB GCO804981SHSHSB GC0804981SHSHSB <br /> Analy Method. ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD # 98071-18919 9807H8919 9607H8919 <br /> Sample Cone ND ND N D <br /> Prepared Date 8/4/98 8/4/98 8/4/98 <br /> Analyzed Date 8/4/98 8/4/98 8/4/98 <br /> Instrument LD #- GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 8 7 10 11 <br /> MS % Recovery 109 125 138 <br /> Dup. Result 8 3 10 10 <br /> MSD % Recov 104 125 125 <br /> RPD 47 00 95 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS #- BLK080498 SLK080498 BLK080498 <br /> Prepared Date. 8/4/98 8/4/98 8/4/98 <br /> Analyzed Date 8/4/98 8/4/98 8/4/98 <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 9 0 94 99 <br /> LCS % ReCov 113 118 124 <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 /> 1gy <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 /> nnernger "*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 98071-187131-A <12> <br />