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Sequoia <br /> 680 Chesapeake Drive 'Redwood City,CA 94063 (415) 364-9600 FAX(40)364-9233 <br /> Analytical ` <br /> Avenue,Suite L 1 Concord,CA 94520 (SIO) 686-9600 FAX(510)686-9689 <br /> 819 Striker Avenue,Suite a Sacramento,CA 95034 (916) 921-9600 FAX(916)921-0100 <br /> ].."Alion' eoscience"" <br /> Client pro166flD.-­­'M0611"04 348/b0-`-;0:'1j6- 5 <br /> 30-A Lindbergh Ave. Matrix: Liquid:: <br /> Livermore, CA 94550 <br /> Attention: Kevin Keenan QC Sample Group: 4070910-921 Reported: Jul 27, 19:94r..r <br /> QUALITY CONTROL',DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> Ii Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 Mod <br /> Analyst: J.Fontecha J. Fontecha J.Fontecha J.Fontecha K.Wimer <br /> MS/MSD <br /> Batch#- 4070680 4070680 4070680 4070680 BLK072094 <br /> Date Prepared: 7/25/94 7/25/94 7/25/94 7/25/94 7/24/94 <br /> Date Analyzed: 7/25/94 7/25/94 7/25/94 7/25/94 7/24/94 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-3B <br /> Conc. Spiked: 20 pg/L 20,ug/L 20 pg/L 60p'g/L 300,ug/L <br /> Matrix Spike <br /> % Recovery: 90 90 90 93 78 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 90 90 90 , 92 89 <br /> Relative <br /> Difference:. 0.0 0.0 010 1.1 13 <br /> ... ..... <br /> .. .......... <br /> .................... <br /> LCS Batch*: 2LC8072594 2LCS072594 2LCS072594 2LCS072594 BLK072094 <br /> Date Prepared: 7/25/94 7/25/94 7/25/94 7/25/94 7/24/94 <br /> Date Analyzed: 7/25/94 7/25/94 .7/25/9.4 7/25/94 7/24/94 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 HP-313 <br /> LCS % <br /> Recovery: 90 93 95 97 78 <br /> % Recovery. <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 /> SEQIU 01A AN ICAL,#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 /> ren <br /> en L Enstrom <br /> Project Manager <br /> 4070910.ALT <5> <br />