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r { Sequoia 680 Chesapeake Drive Rcdwood City,CA 94063 (415) 364 9600 rAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(5 10)988 9673 <br /> Analytical 819 Striker Avcnuc,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Iwo <br /> i <br /> op ac <br /> 'Gettler Ryan/Geostrateglesa++�v ,+,. „+c+rl3.:. ,r`%ird. ixc'uu{,`+�ati+wo.:,.,,:;r..ai::.`�.i+•h,{c',� r?r x r. w3 +,. v ,. y'�v}}y ,ff#,,,::e.Ysv�l,ActS c <br /> Client Project ID Unocal 0187/Stockton , <br /> 3035 Prospect Park Drive, #110 Matrix Liquid <br /> Rancho Cordova, CA 95670 { <br /> Attention Greg Gurss Work Order# 9508004-06 Reported Auq 9, 1995x' <br /> i i S r ,H hr h.Mri+gn-v fY� <br /> }r}a'an.vian a.Ynar4 wA♦ r + ry t r + v M1 ` v+K-{ Y Vn" r r`f$M .}•n r. a A4 Q++n�n . r Jv r r� r r v ,n v n vn + my �fn�v.,.} as <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO80495BTEX20A GCO80495BTEX20A GC080495BTEX20A GCO80495BTEX20A <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 # 9507J1405 9507,11405 9507JI405 9507Ji405 <br /> Sample Conc N D ND ND ND <br /> Prepared Date 8/4/95 8/4/95 8/4/95 8/4/95 <br /> Analyzed Date 8/4/95 8/4/95 8/4/95 8/4/95 <br /> Instrument LD #- GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked 10pg/L 10Ng/L 10,tg/L 30,ug/L <br /> Result. 99 98 98 30 <br /> �S % Recovery 99 98 98 100 <br /> Dup. Result 10 10 97 30 <br /> MSD % Recov 100 100 97 100 <br /> RPD 10 20 10 00 <br /> RPD Limit* 0-50 0-50 0-50 0-50 <br /> }~ ,.: � �f ,•`, + r gr o v ,�t s`V `" °`x �+ r, a V ti } < ,. r. c '�n h 3ry'�r.` n a�iJ�J Y;; <br /> h\ tix.v.Yv W ti'.4tira+ r . ry + n.. n . � i C -•rr + • W Zvi w yr }v r n r J`M nr A h+ „ v t r.l xti v S . v v Iry vrnvnnr Mk¢{S tii.9W <br /> LCS # <br /> Prepared Date <br /> Analyzed Date. <br /> Instrument I D #- <br /> Conc. Spiked <br /> LCS Result <br /> LCS % Recov.: <br /> MS/MSD <br /> LCS 71-133 72-129 72-130 71-120 <br /> Control Limits <br /> Please Note <br /> The LGS is a control sample of known,interferent-free matrix that 1s analyzed using the same reagents, <br /> YePregoryy <br /> LYTICAL 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 9508004 GET <4> <br />