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VChesapeake Drive Redwood City,CA 94063 (650)3649600 FAX(650)3649233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600- FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Zl'T.} �11 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> r� ly i 3 1551 Industrial Road San Carlos,CA 940704111 (650)232-9600 FAX(650)232-9612 <br /> ......: <br /> Sequoia Arialytical Client PIP ID. L904328-5cjullon l=nterprises LLC <br /> 1551 Industrial Blvd. Matrix: Liquid <br /> San Carlos, CA. 94070 <br /> Attention: Mike Gregory QC Sample Group: 9050260-263 Reported: May 13, 1999>' <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 1,1-Dichloro- Trichlorc- Chloro- <br /> ethane ethane benzene <br /> QC Batch#: GC050599 GCO50599 GCO50599 <br /> 801006A 801006A 801006A <br /> Analy. Method: EPA 8010 EPA 8010 EPA8010 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: P, Kosovskaya P.Kosovskaya P.Kosovskaya <br /> MS/MSD#: 9042686 9042686 9042686 <br /> Sample Cone.: N.D. N.D. N.D. <br /> Prepared Date: 5/5/99 5/5/99 5/5/99 <br /> Analyzed Date: 5/5/99 5/5/99 5/5/99 <br /> Instrument I.D.#: HP-6 HP-6 HP-6 <br /> Cone. Spiked: 20Ng/L 20 Ng/L 20 Ng/L <br /> Result: 24 28 25 <br /> MS % Recovery: 120 140 125 <br /> Dup. Result: 22 25 23 <br /> MSD % Recov.: 110 125 115 <br /> RPD: 8.7 11 8.3 <br /> RPD Limit: 0-25 0-25 0-25 <br /> LCS #: LCS050599 LCS050599 LCS050599 <br /> Prepared Date: 5/5/99 5/5/99 5/5/99 <br /> Analyzed Date: 5/5/99 5/5/99 5/5/99 <br /> Instrument I.D.#: HP-6 HP-6 HP-6 <br /> Conc. Spiked: 20Ng/L 20 Ng/L 20pg/L <br /> LCS Result: 21 23 22 <br /> LCS % Recov.: 105 115 110 <br /> LCSD Result: 14 16 17 <br /> LCSD % Recov.: 70 80 85 <br /> LCS 65-135 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 A CAL,#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. H <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recove is to be used to validate the batch. <br /> Charlie Westwater --MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager <br /> 9042477.SSS <9> <br />