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680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX <br /> Sequoia (650)364 9233. <br /> 404 N Wiget Lane Wainut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento, CA 95834 (916) 921-9500 FAX(916)921 Ot00• <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /980112-Hi <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 a <br /> Attention Fran Thie Work Order# 9801694 -01-05 <br /> l V A , ,l .. l Reported Jan 30, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Methanol Ethanol Iso-Propanol <br /> QC Batch#. GCO119981SHSHSB GCO119981SHSHSB GCO119981SHSHSB <br /> Analy. Method- ISHS ISHS ISHS <br /> Prep Method: HS HS HS <br /> Analyst: T Tran T Tran T Tran <br /> MS/MSD# 980129606 980129606 980129606 <br /> Sample Conc : N D N D N D <br /> Prepared Date. 1/19/98 1/19/98 1/19/98 <br /> Analyzed Date 1/19/98 1/19/98 1/19/98 <br /> Instrument LD #. GCV1 GCV1 GCV1 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result. 74 76 72 <br /> MS % Recovery 93 95 90 <br /> Dup Result. 72 76 74 • <br /> MSD % Recov • 90 95 93 <br /> RPD 27 00 27 <br /> RPD Limit: 0-50 0-50 <br /> LCS # BLK011998 BLK011998 BLK011998 <br /> Prepared-Date'----1/19/98 -1/19/98— - --17 <br /> 19]98 -- — - -- -- — -- — -------- - ------- <br /> Analyzed Date 1/19/98 1/19/98 1/19/98 <br /> Instrument I D.# GCV1 GCV1 GCV1 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 82 82 80 <br /> LCS % Recov 103 103 100 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents <br /> gegPenner <br /> ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampl <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> nager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Aelative %Difference 9801694 BLA <1> <br />