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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)164-9Z33 ` <br /> 404 N Wiget lane Walnut Creek CA 94598 (510)988 9600 FAX(510)988-9¢73 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> V07 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 2494 Fremont <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805902-02-04 Reported May 28, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> OC Batch# GCO519981SHSHSB GCO519981SHSHSB GCO519981SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD# 980577204 980577204 980577204 <br /> Sample Cone N D N D N D <br /> Prepared Date 5/19/98 5/19/98 5/19/98 <br /> Analyzed Date 5/19/98 5/19/98 5/19/98 <br /> Instrument LD # GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 73 as 82 <br /> MS% Recovery 91 106 103 <br /> Dup Result 64 75 72 • <br /> MSD % Recov 80 94 90 <br /> RPD 13 13 13 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS# BLK051998 BLK051998 BLK051998 <br /> Prepared Date 5/19/98 5/19/98 5/19/98 <br /> Analyzed Date 5/19/98 5/19/98 5/19/98 <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 77 so 80 <br /> LCS % Recov 96 100 100 <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 /> SECS NA ICAL 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 I <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 /> Pe y ginner <br /> Prolec Manager *"MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9805902 BLA <2> <br />