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SSequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364.9600 FAX(650)364-9233 <br /> J 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Sultc 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> N,,,.arribria'JClient Club en# Prosect ID: She!! 1267 <br /> ::::270 Perkins Ave. Matrix. Solid <br /> :;'Sonoma, CA 95476 <br /> 'Attention: Joe Nee[ Work Order#: 9802D58-05 Reported: Mar 10, 1998.,:- <br /> ,.. Y :.:::.:::................. <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC030398BTEXEXB GC030398BTEXEXB GCO30398BTEXEXB GC030398BTD(EXB GC030398STECEXB <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: J. Minkel J.Minkel J.Minkel J. Minkel J.Minkel <br /> MS/MSD #: 980214903 980214903 980214903 980214903 980214903 <br /> Sample Cork.: N.D. N.D. N.D. N.D. N.D. <br /> Prepared Date: 3/3/98 3/3/98 3/3/98 3/3/98 3/3/98 <br /> Analyzed Date: 3/4/98 3/4/98 3/4/98 3/4/98 3/4/98 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cone. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> Result: 0.17 0.19 0.18 0.56 1.1 <br /> MS % Recovery: 85 90 85 84 84 <br /> Dup. Result: 0.17 0.18 0.18 0.55 1.1 <br /> MSD % Recov.: 85 85 85 82 84 <br /> �v <br /> RPD: 0.0 5.4 0.0 1.8 0.0 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK030398 BLK030398 BLK030398 BLK030398 BLK030398 <br /> Prepared Date: 3/3/98 3/3/98 3/3/98 3/3/98 3/3/98 <br /> Analyzed Date: 3/4/98 3/4/98 3/4/98 3/4/98 3/4/98 <br /> Instrument I.D.#: GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 0.20 mg/Kg 0.20 mg/Kg 0.20 mg/Kg 0.60 mg/Kg 1.2 mg/Kg <br /> LCS Result: 0.17 0.17 0.17 0.52 1.1 <br /> LCS %Recov.: 85 85 85 87 92 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 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 Alg#LYTICAL 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 /> >4egory <br /> oieet Manager MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9802Q58,CCC <5> <br />