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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364-9233 <br /> 404 N.Viget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988-9673 <br /> qW Analytical 119 Striker Avenue,Suit,8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> ient Project I "Onoc"al #0788, 8203 11th t., Tracy <br /> bs ervices C]'e 8 <br /> 2401 Stanwell Dr., Ste. 300 MatriX-. Liquid <br /> Concord, CA 94520 <br /> Attention: Jarrel Crider QC Sample Group: 6110476-482 Reported: Nov 27, 1996 <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 <br /> Analyst: D. Newcomb D. Newcomb D.Newcomb D.Newcomb D.Sharma <br /> IVIS/IVISD <br /> Batch#: 6110450 6110450 6110450 6110450 BLK111496 <br /> Date Prepared- 11/21/96 11/21/96 11/21/96 11/21/96 11/14/96 <br /> Date Analyzed: 11/21/96 11/21/96 11/21/96 11/21/96 11/15/96 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> Conc. Spiked: 20 pg/L 20 pg/L 20 pg/L 60 pg/L 300 Mg/L <br /> Matrix Spike <br /> %Recovery: 90 90 90 93 73 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 90 90 95 93 77 <br /> Relative% <br /> Difference: 0,0 0.0 5.4 0.0 4.4 <br /> ............ <br /> ........... <br /> .......... . ............ <br /> LCS Batch#: 5LCS112196 5LCS112196 5LCS112196 5LCS112196 LCS111496 <br /> Date Prepared: 11/21/96 11/21/96 11/21/96 11/21/96 11/14/96 <br /> Date Analyzed: 11/21/96 11/21/96 11/21/96 11/21/96 11/15/96 <br /> Instrument I-D.#: HP-5 HP-5 HP-5 HP-5 HP-3A <br /> LCS% <br /> Recovery: 90 90 90 92 80 <br /> % Recovery <br /> Control Limits: 60-140 60-140 60-140 60-140 60-140 <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 /> nature on File the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Alan B. Kemp1 interference,the LCS recovery is to be used to validate the batch, <br /> Project Manager <br /> 6110476.MPD <5> <br />