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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9Z33 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 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)79Z-0342 <br /> Sequoia Analytical - Petaluma Client Project ID P903277 <br /> 1455 N McDowell Blvd Ste D Matrix Liquid <br /> Petaluma CA 94954 <br /> Attention Scott Forbes Work Order# 9903C77 01, 02 Reported Apr 5, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-propanol <br /> QC Batch# GCO401991SHSHSB GC04019918HSHSB GCO401991SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst M M M M M M <br /> MS/MSD# 9903C8601 9903C8601 9903C8601 <br /> Sample Cone ND NO NO <br /> Prepared Date 4/1/99 4/1/99 4/1/99 <br /> Analyzed Date 4/1/99 4/1/99 4/1/99 <br /> Instrument I D # GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 75 85 90 <br /> MS % Recovery 94 106 113 <br /> Dup Result 79 89 97 <br /> MSD % Recov 99 111 121 <br /> RPD 52 46 75 <br /> RPD-Limito-5a 0-50 0-50 <br /> LCS # L08020499 LCS020499 LCS020499 <br /> Prepared Date 4/1/99 4/1/99 4/1/99 <br /> Analyzed Date 4/1/99 4/1/99 4/1/99 <br /> Instrument I D # Gr-v1 GCv1 GCv1 <br /> Cone. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 73 84 84 <br /> LCS % Recov 91 105 105 <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 matrrx spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> s t 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 /> Wim� <br /> J <br /> tM **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9903077 SSS <1> <br />