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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N VAget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Blaine Tech Services, Inc" <br /> Client Project ID Shell Stockton/971202-L1 <br /> 1680 Rogers Ave Matrix Liquid <br /> ,San Jose, CA 95112 <br /> 'Attention Fran Thie Work Order# 9712358-10, 9712360-15 Reported Dec 31, 1997 <br /> f <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanal <br /> QC Batch#- GC1209971SHSHSB GC1209971SHSHSB GC1209971SHSHSB <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 # 9711G1903 971161903 971161903 <br /> Sample Conc N D N D N D <br /> Prepared Date 12/9/97 12/9/97 12/9/97 <br /> Analyzed Date 12/9/97 12/9/97 12/9/97 <br /> Instrument I.D #- GCV1 GCV1 GCV1 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 83 88 89 <br /> MS % Recovery. 104 110 111 <br /> Dup. Result- 84 85 84 <br /> MSD % Recov. 105 106 105 <br /> RPD. 12 35 58 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS # 13LK121097 BLK121097 BLK121097 <br /> Prepared Date- 12/10/97 12/10/97 12/10/97 <br /> Analyzed Date 12/10/97 12/10/97 12/10/97 <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: 79 79 78 <br /> LCS % Recov : 99 99 98 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Vegen NALYTICAL 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 It <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 /> age **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9712358 SLA <11> <br />