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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 1 404 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)792-0342 <br /> ettler-Ryan-Dublin....... -�Ilent Project ID. :..;.Tosco#111'95, Lath <br /> rop <br /> ::::J747 Sierra Court, Suite J Matrix: Solid <br /> Dublin, CA 94568 <br /> Attention: Clyde Galantine QC Sample Group: 9010001-007 Reported: Jan 14, 1999;: <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes MTBE <br /> Benzene <br /> QC Batch#: SP010499 SP010499 SP010499 SP010499 SP123198 <br /> 8020EM 8020EXA 8020EXA 8020EXA 8260EXA <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8260 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: D. Newcomb D. Newcomb D. Newcomb D. Newcomb N. Nelson <br /> MS/MSD #: 8122042 8122042 8122042 8122042 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Prepared Date: 1/4/99 1/4/99 1/4/99 1/4/99 <br /> Analyzed Date: 1/4/99 1/4/99 1/4/99 1/4/99 <br /> Instrument I.D.#: HP-4 HP-4 HPA HP-4 <br /> Conc. Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg <br /> Result: 0.97 0.81 0.82 2.7 <br /> MS % Recovery: 121 101 103 113 <br /> Dup. Result: 0,92 0.79 0.80 2.7 <br /> .MSD % Recov.: 115 99 100 113 <br /> RPD: 5.3 2.5 2.5 0.0 <br /> RPD Limit: 0-20 0-20 0-20 0-20 <br /> LCS #: 4LCS010499 4LC8010499 4LCS010499 4LC8010499 LCS010499 <br /> Prepared Date: 1/4/99 1/4/99 1/4/99 1/4/99 1/4/99 <br /> Analyzed Date: 1/4/99 1/4/99 1/4/99 1/4/99 1/4/99 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 GC/MS-2 <br /> Conc, Spiked: 0.80 mg/Kg 0.80 mg/Kg 0.80 mg/Kg 2.4 mg/Kg 2500 jig/kg <br /> LCS Result: 0.68 0.60 0.64 2.2 2,400 <br /> LCs % Recov.: 85 75 80 92 96 <br /> LCs 50-150 50-150 50-150 50-150 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, #1271 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 /> J Ianne Fegley **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager <br /> 9010006-GET <6> <br />