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l 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650)364-9233 <br /> Sequoia <br /> uoa <br /> 404 N Wlget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(92S)988-9673 <br /> Analytical <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 707 792-1865 FAX 707 792-0342 <br /> Sequoia Analytical -Petaluma Client Project ID P901357 <br /> 1455 McDowell Blvd North Suite D Matrix Liquid <br /> Petaluma CA 94954 <br /> Attention Scott Forbes Work Order# 9901 D36 01, 02 Reported Feb 11, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-propanol <br /> QC Batch# GCO127991SHSHSB GCO127991SHSHSB GC0127991SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst M M M M M M <br /> MS/MSD#- 99oiA77o3 9901A7703 9901A7703 <br /> Sample Conc. N D N D N D <br /> Prepared Date 1/28/99 1/28/99 1/28/99 <br /> Analyzed Date 1/28/99 1/28/99 1/28/99 <br /> Instrument I D# GCV1 GCV1 GCV1 <br /> Conc Spiked s 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 64 72 75 <br /> MS% Recovery 80 90 94 <br /> Dup Result 64 72 74 <br /> SD % Recov 80 90 93 <br /> RPD 35 00 13 <br /> RPD Limrt• 0-50 0-50 0-50 <br /> LCS# LCS012799 LOS012799 LC8012799 <br /> Prepared Date 1/27/99 1/27/99 1/27/99 <br /> Analyzed Date 1/27/99 1/27/99 1/27/99 <br /> Instrument LD# GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 62 61 64 <br /> LCS %Recov 78 76 80 <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 /> lei Mel Shin <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9901D36 SSS <1> <br />