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r <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> Analytical. <br /> Bates Avenue, Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686.9689 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0 100 <br /> MPDS services "Client project ICi: Uriocal #0788, 82{)3 . 11th St:; 'racy <br /> <°2401 Stanwell Dr., Ste. 300 Matrix: Liquid <br /> Concord,CA 94520 <br /> Attention: Sarkis Karkarian QC Sample Group: 5020798-807 Reported: Mar 2, 1995:':; <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 Mod <br /> Analyst: A.Tuzon A.Tuzon A.Tuzon A.Tuzon K.Wimer <br /> MS/MSD <br /> Batch#: 5020900 5020900 5020900 5020900 BLKG21795 <br /> Date Prepared: 2/22/95 2/22/95 2/22/95 2/22/95 2/17/95 <br /> Date Analyzed: 2/22/95 2/22/95 2/22/95 2/22/95 2/21/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-3A <br /> Conc.Spiked: 20yg/L 20pg/L 20,ug/L 60pg/L 30i]pg/L <br /> Matrix Spike <br /> %Recovery: 85 90 90 93 101 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 85 90 90 93 104 <br /> Relative% <br /> Difference: 0.0 0.0 0.0 0.0 2.3 <br /> LCS Batch#: 2LCS022295 2LCS022ZS 2LCS022295 2LCS022295 BLK021795 <br /> Date Prepared: 2/22/95 2/22/95 2/22/95 2/22/95 2/17/95 <br /> Date Analyzed: 2/22/95 2/22/95 2/22/95 2/22/95 2/21/95 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-3A <br /> LCS% <br /> Recovery: 85 90 90 91 101 <br /> ° ecovery <br /> Control Limits: 71-133 72-128 72-130 71-120 28-122 <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 /> *Signature on File the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Alan B. Kemp interference,the LCS recovery is to be used to validate the batch. <br /> Project Manager <br /> 5020798.MPD <6> <br /> 'bt5' <br />