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Sequoia 680 Chesapeake Drive Redwood City CA 94463 (650) 364 9600 FAX(650) 364-9233 <br /> ez� <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988 9600 FAX(510)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 2494 Fremont <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805902-05 Reported May 28, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso Propanol <br /> i <br /> QC Batch# GC0520981SHSHSB GC0520981SHSHSB GCO520981SHSHSB <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 I D # GCV1 GCV1 GCV1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 7 3 8 5 8 2 <br /> MS % Recovery 91 106 103 <br /> . Dup Result 6 4 75 72 <br /> MSD % Recov 80 94 90 <br /> RPD 13 13 13 <br /> HPD Limit 0-50 0-50 0-50 <br /> LCS # BLK052098 BLK052098 BLK052096 <br /> Prepared Date 5/20/98 5/20/98 5/20/98 <br /> Analyzed Date 5/20/98 5/20/98 5/20/98 <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 72 79 78 <br /> LCS % Recov 90 99 98 <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 /> OI A ALYTICAI.. 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 /> eggy enn <br /> P e Manager *"MS=Matrix Spike, MSD=IVIS Duplicate, RPD=Relative% Difference 9805902 BSA <3> <br /> g� <br />