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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 Crede CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X111 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Fugro West, Inc Client Project ID 9347-1044, Exxon 7-0137 <br /> $1050 Melody Lane, Suite 160 Matrix Liquid {< <br /> f Roseville, CA 95678 <br /> ,Attention Paul Graff Work Order # 9505014-03, fi Reported Jun 7, 1995 - <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#• GCO52395BTEX17A GC052395STEX17A GC052395BTIX17A GC0523958TEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. R Vincent R Vincent R Vincent R Vincent <br /> MS/MSD # 9505CO601 9505CC601 950500601 950500601 <br /> Sample Cone. N D N D N 0 N D <br /> Prepared Date: 5/23/95 5/23/95 5/23/95 5/23/95 <br /> Analyzed Date 5/23/95 5/23/95 5/23/95 5/23/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked: 10yg/L 10}tg/L 10,ug/L 30115/L <br /> Result 88 86 92 27 <br />• MS % Recovery. 88 86 92 91 <br /> Dup Result- 86 82 88 26 <br /> MSD % Recov .. 86 82 88 87 <br /> RPD 23 48 44 49 <br /> RPD la m lt: 0-50 0-50 0-50 0-50 <br /> < ` {v ' ~ w1 ' • '.v , 4 Fi + , +. r+,1 vti r • ' r s, ' w , + . ` rr♦4 <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 72-128 72-130 71-120 <br /> Control L1mdS <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> ///►►► A fortified with known quantities of specific compounds and subjected to the entire analytical procedure 9 <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 /> Vickie Tague Clark <br /> Project Manager ""MS=Matrix Spike, MSD=MS Duplicate,RPO-Relative%Difference 9505014 FFF <2> <br /> �5 _ <br />