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F) p <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)968-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834' (916)921-9600 FAX(916)921-0100 <br /> D <br /> 1455 McDowell Blvd.North,Ste. Petaluma,CA 94954 707)792-1865 FAX 707 792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Sequoia Analytical-San Carlos Client Project ID: L904019-01/ATC 17295.0001 <br /> 1551 Industrial Road <br /> San Carlos, CA 94070 <br /> Attention: M. Gregory QC Sample Group: 9904266-01 thru -03 Reported: May 18, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015A <br /> Analyst: J.BONNVILLE <br /> ANALYTE Diesel <br /> QC Batch#: GC0411990HBPEXA <br /> Sample No.: 9904260-3 <br /> Date Prepared: 4111/99 <br /> Date Analyzed: 4113/99 <br /> Instrument I.D.#: GCHP5B <br /> Sample Conc.,ug/L: 2'10 <br /> Conc.Spiked,ug/L: 1000 <br /> Matrix Spike,u91L: 1100 <br /> % Recovery: 89 <br /> Matrix <br /> Spike Duplicate,ug1L 580 <br /> % Recovery: 37 <br /> Relative%Different, 83 <br /> RPD Control Limits: 0-50 <br /> LCS Batch#: BLK041199AS <br /> Date Prepared: 4/11/99 <br /> Date Analyzed: 4/13199 <br /> Instrument I.D.#: GCHP513 <br /> Conc.Spiked,ug/L: 1000 <br /> Recovery,ug/L: 910 <br /> LCS% Recovery: 91 <br /> Percent Recovery Control Limits: <br /> MSIhASD 50-150 <br /> LCS 60-140 <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met. <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 /> t 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 recoveryis to be used to validate the batch. <br /> Lea- o s <br /> Project Manager <br />