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4Sequoia `/ 680 Chesapeake Drive Redwood City,CA 940'69-0' (415) 364-9600 FAX(415)364-9233 <br /> r 1) . 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686-9689 <br /> frilly Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> REM. <br /> N.a;::::>.... <br /> : .............::.................................... <br /> S A <br /> Client Project lb: " <br /> 0 95.0 ` <br /> S <br /> 0 Western .t:o.:. <br /> n <br /> e <br /> .42501 Albrae Street Matrix: Liquid <br /> `Fremont, CA 94538 <br /> Attention Lois Frantz QCSample Group 9409580 -01 2 Reported: Sep 27, 1994..`: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Diesel Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8015 EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> -Analyst: M.Cassidy J.Minkel J.Minkel J.Minkel J.Minkel <br /> MS/MSD <br /> Batch#: 940987702 940983401 940983401 940983401 940983401 <br /> Date Prepared: 9/19/94 <br /> Date Analyzed: 9/20/94 9/21/94 9/21/94 9/21/94 9/21/94 <br /> Instrument I.D.#: GCHP•5 GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc. Spiked: 6Wpg/L 10Ng/L 10Ng/L 10Ng/L 30pg/L <br /> Matrix Spike <br /> %Recovery: 80 110 110 110 110 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 87 110 110 110 110 <br /> Relative% <br /> Difference: 8.4 0.0 0.0 0.0 0.0 <br /> xx <br /> LCS Batch#: <br /> Date Prepared: <br /> Date Analyzed: <br /> Instrument I.D.#: <br /> LCS % <br /> Recovery: <br /> Recovery <br /> Control Limits: 28.122 71.133 72-128 72-130 71-120 <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 /> �I 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 /> Vickie Tague Clark <br /> Project Manager 9409580.RES <1> <br />