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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364.%00 FAX (415) 364.9233 <br /> Bates Avenue suite L Concord,CA 94520 (510) 686 9600 FAX(5 10)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 911-9600 FAX(916)921 0100 <br /> fiNlittelhauser Corporation Client Project ID 2168 01-001, Unocal/Tracy <br /> 7901 Stonendge Drive, Suite 123 Matrix Liquid <br /> ' r Pleasanton, CA 94588 VA y <br /> ,Attention R Marks/R Papler _ Work Order# 5502243-09, 11 _ Reported Feb 9, 1995, <br /> r s s,� ,yr3�f "~i&'t; rfi 'Y h..r<:c'fdc:r.� ,':•r 2..H..�' ..L:,v.`„wu <br /> f <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> ' Benzene <br /> OC Batch#- GCO20695BTECo3A GCO20695STEX03A GCO20695BTE MA GCO20695HTEC03A <br /> Ana ly Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> ' Analyst: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD#: 9501F1201 9501F1201 9501F1201 9501F1201 <br /> Sample Conc.: NO ND ND N D <br /> ' Prepared Date: 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Analyzed Date: 2/6/95 2/6/95 2/6/95 2/6/95 <br /> Instrument I D.#: GCHP3 GCHP3 GCHP3 GCHP3 <br /> ' Conc Spiked: long/L 10pg/L 10pg/L 30pg/L <br /> Result: 9 6 95 95 29 <br /> MS % Recovery: 96 95 95 97 <br /> Dup. Result: 8 7 8 7 87 26 <br /> MSD % Recov.: 87 87 87 87 <br /> ' RPD: 98 88 88 11 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> ' xx , ,r.r v S• r. r. ~r�J,nw-.} .., nr v f�~,,:'" , .. f, 'iy } °f.r` ,.., r .w.;s,':ia,'^,G,:vr.w"i.,cr'Sa.fkx,',ti3�':, v:arY?t.. �h'w3.xrr. <br /> .iSCSti'^1ri r`+Y vlvt, r'vf+.}xf."irk` . <br /> LCS#: - - <br /> ' Prepared Date: = <br /> Analyzed Date: <br /> Instrument I.D.#: - - - <br /> ' Conc Spiked: - = <br /> LCS Result: <br /> LCS % Recov.: - - <br /> ' LCS T1-133 72-128 72-130 71-120 <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 ANALYTICAL 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 it <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> Interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague lark <br /> Project Manager '*MS=Matrix Spike,MSD=MS Duplicate,RPO=Relative Difference 9502243 MMM <4> <br />