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Sequoia 680 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 /> �I Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> }r0 <br /> { E A Engineering Science&Tech Client Project hID ' Exxon 7-3942, 83739421307 <br /> 3468 Mt Diablo Blvd , Ste B-100 Matrix Liquid <br /> Lafayette, CA 94549 9505983-10, 17, 19 ReMay 23, 19951=n, <br /> }?Attention T Faulkner Work Order# ported <br /> .... x,>',in,K,Rox:r i,2,b,ac ts...,.aa{ wrnrrr•.a�. a.,.....Lx}.� o,u x .r � ..L.;,coNr,nS,n,h S,s,.� }.c.rnl �ti w, < t�}tib,.;:.e.a.,:s.}... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br />' Benzene <br /> QC Batch#: GC0518958TEX02A GC051895BTEX02A GCO51895BTEX02A GCO51895BTEX02A <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 Minkel J Minkel J Minkel J Minkel <br /> M S/MSD# 950598505 950598505 950598505 950598505 <br />' Sample Conc N D N D N D N D <br /> Prepared Date 5/18/95 5/18/95 5/18/95 5/18/95 <br /> Analyzed Date 5/18/95 5/18/95 5/18/95 5/18/95 <br />' Instrument LD # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30yg/L <br /> Result 98 i0 10 30 <br /> MS % Recovery 98 100 100 100 <br /> Dup Result: 10 10 10 31 <br /> MSD %Recov 100 100 100 103 <br />' RPD. 20 00 00 33 <br /> RPD Limit. 0.50 0-50 0-50 0-50 <br /> Ninr:oaU11r^�a r,as•{{ry^x+r riv ` ,. nvi r}1Y.,n,� trrc� N rrci+s$ry{ }rr aVtix l",'`"i^^r 1•r vrr�rY o'rG`;+4`,x; r7`xv}{ � <br /> h i ' }Ort.`v. a {i}V,v N }" {• }fin`nv, C,4 aaw vir w`+ ♦ {r.'` `.Cv iYr}rc nr riv`.`AW.,rC+ a2rckivv}va NCiti r{hR twr r hrl,n-0:`L$v <br /> r Y v4h r4rC +,.'ri�K rYr."r h'v,4S a "i.`/nv SAN }n` v.L. i.•i C xv,rw1n ♦+Y.i <br /> LCS - <br /> Prepared Date <br /> Analyzed Date: - - - <br />' Instrument I.D #: <br /> Conc Spiked: <br /> LCS Result - - - <br />' LCS %Recov: - - - <br />' MS/Mg-D- <br /> LCS 71-133 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 /> 7eg(gyPenner 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 />' Project Manager *"MS=Matrix Spike,MSD=MS Duplicate, RPD-Relative%Difference 9505983 EEE <3> <br />