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1Y' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N 110get Lane Walnut Creek CA 94598 (9Z5)988-9600 FAX(9Z5)988-9673 <br /> frill>7 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)421-9600 FAX(9t6)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650)232-9600 FAX (650)232-9612 <br /> Sequoia Analytical -San Carlos Client Project ID L904336 <br /> 1551 Industrial Road Matrix Liquid <br /> San Carlos CA 94070 <br /> Attention M Gregory Work Order# 9904676 01-03 Reported May 1 Q, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-propanol <br /> QC Batch# GCO504991SHSHSB GCO504991SHSHSB GCO504991SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst M M M M M M <br /> MS/MSD# 9904135104 9904B5104 9904B5104 <br /> Sample Conc ND N D ND <br /> Prepared Date 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 66 84 83 <br /> MS % Recovery 83 105 104 <br /> Dup Result 71 81 84 <br /> MSD % Recov 89 101 105 <br /> RPD 73 36 12 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # LCS050499 LCS050499 LCS050499 <br /> Prepared Date 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/i- 8 0 mg/L <br /> LCS Result 86 93 95 <br /> LCS % Recov 108 116 119 <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 /> SEQUOIA 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 /> Ka I a <br /> Project M ager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference 9904B76 SSS <1> <br />