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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(6510)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988%73 <br /> low Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 9, <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 H81-05-06 Reported Feb 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol iso-Propanol <br /> QC Batch# GCO204981SHSHSA GCO204981SHSHSA GCO2049SISHSHSA <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 # 9801 FO904 9801 FO904 9801 FO904 <br /> Sample Conc N D N D N D <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 1 D # GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 53 58 55 <br /> MS % Recovery 66 73 69 <br /> Dup Result 54 59 57 <br /> MSD % Recov 68 74 71 <br /> RPD 19 17 36 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK020598 BLK020598 BLK020598 <br /> Prepared Date 2/5/98 2/5/98 2/5/98 <br /> Analyzed Date 2/5/98 2/5/98 2/5/98 <br /> Instrument I D # GCV1 GCV1 GCV1 <br /> Conc Spiked S 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 58 60 60 <br /> LCS % Recov 73 75 75 <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 /> ;Pegg <br /> I ANALYTICAL 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 /> ennerManager "*MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9801H79 BLA <8> <br />