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I Sequoia680 Chesapeake Drive Redwood City, CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 'h,{v,{MC°.x` ni+ xwv'rh+"'n+A}v r}W.:x vn+xC} xr A]xr Vile 4 Y h,r,-vnr v'�r him r r+.{nrS{C 4} .n .. vn{+ x •O h+xn, Son <br /> Blame Tech Services, Inc Client Project ID Shell, Stockton/960516-A2 <br /> ,985 Timothy Drive Matra Liquid Y< <br /> gSan Jose, CA 95133 `{ <br /> Attefltion Jim Keller _ Work Order# _9605C70 -01-09 M x ryRep..rted May 29, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#. GC0522%BTEX02A GCO52296BTEX02A GC052296BTEX02A GCO52296BTEX02A <br /> Analy. Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J Woo J Woo <br /> MS/MSD# 96nmW4 960.5A6004 9605A6004 960SA6004 <br /> Sample Conc.: N D N D N D N D <br /> Prepared Date: 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Analyzed Date. 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc.Spiked: 10 pg/L 10 pg/L 10 pg/L 30 ug/L <br /> Result: 88 89 89 24 <br /> OMS%Recovery: 88 89 89 so <br /> Dup. Result. 88 89 88 26 <br /> MSD %Recov.: 88 89 88 87 <br /> RPD: 00 00 11 80 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> LCS#: BLK052296 BLK052296 BLK052296 BLK052296 <br /> Prepared Date. 5/72/96 5/22/96 5/22/96 5/22/96 <br /> Analyzed Date 5/22/96 5/22/96 5/22/96 5/22/96 <br /> Instrument I.D.#. GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked: 10pg/L 10pg/L topg/L 30pg/L <br /> LCS Result' 93 94 95 29 <br /> LCS%Recov ,, 93 94 95 97 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 <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 /> TPegenner <br /> NALYTICAL 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 /> r ject Manager *'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9605070 BLA <17 <br />