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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 %73 <br /> trills Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 %00 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton/ 980129-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9801 H81-02-04, 07-09, Reported Feb 13, 1,998 <br /> 9801 H84-01-02 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> QC Batch# GO0203981SHSHSA GCG203981SHSHSA GCO203981SHSHSA <br /> Analy Method ISHS EPA 8020 EPA 8020 <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD # 9801C9301 980109301 980109301 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/3/98 2/3/98 2/3/98 <br /> Analyzed Date 2/3/98 2/3/98 2/3/98 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 61 67 65 <br /> MS % Recovery 76 84 81 <br />. Dup Result 57 62 60 <br /> MSD % Recov 71 78 75 <br /> RPD 58 78 80 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK020498 BLK020498 BLK020498 <br /> Prepared Date 2/4/98 2/4/98 2/4/98 <br /> Analyzed Date 2/4/98 2/4/98 2/4/98 <br /> Instrument I D # GCv1 GCv1 GGv1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L. <br /> LCS Result 59 63 61 <br /> LCS % Recov 74 79 76 <br /> LCS 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LOS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> QU YTICAL 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 /> Pe y er <br /> Proje anager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 98011-179131-A <7> <br />