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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686-9600 FAX(510) 686 9689 <br /> Analytical 8!9 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(9I6) 921 0100 <br /> { �r tivx, , vr,,,tinvY rav♦ rhr . rYr fvux+ ,, rr Yryvr S n r v vAb rw b fJ r.- ,r r <br /> Y , i } v ` F ` r }r fi n •M ..,• r r}Y •},v Y.wxv.{rbrJ 9vAL, svfbsx Jrvh»r+x,'tr.S v.i, rrA <br /> Mittel hauser Corporation r s s Client Project ID 2168 01-001, Unoral/Tracy <br /> 17901 Stoneridge Drr4e, Suite 123 Matrix Liquid <br /> ' Pleasanton, CA 94588 x :V r Y n Feb 9, 1995 <br /> Attention R Marks/R Papier Work Order# 95(32243-10, 12 Reported v <br /> , {v,,,...ib ' ,e • .h, x � .. ,+. .x,{�r,,arF .rk5}{.x�,t <br /> ' OUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#' GCO207953TEX02A GCO207958TEX02A GCO20795BTEX02A GCO20795BTEX02A <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 /> MS/MSD#: 9501 F0001 9501 F0001 9501 FOOD1 9501 F0001 <br /> Sample Conc.: N D N D N D N D <br /> ' Prepared Date: 2/7/95 2/7/95 2/7/95 2/7/95 <br /> Analyzed Date: 2/7/95 2/7/95 2/7/95 2/7/95 <br /> instrument I.D.#: GCHP2 GCHP2 GCHP2 GCHP2 <br /> ' Cone Spiked: loos/L 10pg/L 1Dfrg/L 30pg/L <br /> Result: 99 99 10 30 <br /> MS °/. Recovery: 99 99 100 100 <br /> Dup. Result: 96 96 98 29 <br /> MSD %Recov.: 96 96 98 97 <br /> RPD: 31 31 20 34 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> ~ .v k <br /> ~'`~ <br /> }n }~ x< vrTx ..Yv xrA'h"'v n in~..tr.•A`iLvivrsrr' <br /> LCS #• - <br /> ' Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#: - - - <br /> ' Conc. Spiked: - - - <br /> LCS Result: - - - - <br /> ' LCS % Recov.: - - - - <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 /> SEOUOIA 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 If <br /> n-- the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> r� interference,the LCS recovery is to be used to validate the batch <br /> Vickie ague Clark <br /> Project Manager "MS=Matnx Spike,MSD=MS Duplicate,RPD-Relative%Difference 9502243 MMM <5> <br />