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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 /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br />' E A En Ineerin Science &Tech r Client Project ID nr l4v r n r <br /> 9 9 1 Exxon 7-3942, 5153942 1300 <br /> 3468 Mt Diablo Bivd , Ste B-100 Matrix Liquid <br /> Lafayette, CA 94549 <br /> ,Attention Tracy Faulkner Work Order# 9611209 11, 14, 15, 21, 22 Reported Nov 14, 1996 <br /> ern 4}xx}v nry.. t } r }ry z ~ i ♦. .. vrvnrr r. wr r }r r v r v rr h V M1r • ur vrJrr v v Vvut r <br />' QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br />' Benzene <br /> OC Batch# GC110796BTEX21A GC110796BTEX21A G0110796BTEX21A GC110796BTEX21A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br />' Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Fish G Fish G Fsh G Fish <br /> MS/MSD#. 9611o59o2 961105902 961105902 961105902 <br />' Sample Cone • N D N D N D N D <br /> Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date 11/7/96 11/7/96 11/7/96 11/7/96 <br />' instrument I D# GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone Spiked 10ug/L 10ug/L 10pg/L 30Erg/L <br /> Result 10 93 94 28 <br /> MS % Recovery 1 D 93 94 93 <br /> Dup Result 10 94 95 28 <br /> MSD % Recov 100 94 95 93 <br /> RPD 00 11 11 00 <br /> RPD Limit 0-25 0-25 0-25 0.25 <br /> n vvvn vvrnrtr v 4 Ynn r tv`w { M1 v 4} vry Y .... r vv r v .ry r+v4 M1, ♦vv veyr.,yr s.vn r Vf v t vx ..ry v hY v1 r `4 ♦ ,, ~ <br /> LCS #. BLK110796 BLK110796 BLK110796 BLK110796 <br />' Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date: 11/7/96 11/7/96 11/7/96 11/7/96 <br />' Instrument LD # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone Spiked 10ug/L lopg/L 10pg/L 30pg/L <br /> LCS Result 98 90 91 27 <br />' LCS %Recov 98 90 91 90 <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-tree matrix that is analyzed using the same reagents, <br /> SEQUO 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 /> 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 /> Kevin Follett <br />' Project Manager *•MS=Matrix Spike,MSD-MS Duplicate, RPD=Relative%Difference 9611209 EEE <3> <br />