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Sequoia 630 Cncsapeakc Dn�e 2edwcod C4 94Co3 (415) 30- 96r3 FA.t (415) 364 9:33 <br /> -"� Sequoia <br /> 404 ,N Wt3et Lane walnut C cek CA 94593 (� Qf 933 9600 FAX(610) 933 9673 <br /> Analytical 319 Smkcr Avenuc Su' c 3 Sacrame ito CA 95334 (9161 921 9600 FkX 1,956) 921 0100 <br /> i <br /> E A Engineering Science &Tech Client Project ID Exxon 7-3942/8373942 1307 <br /> 3468 Mt Diablo Blvd , Ste B-100 Matrix Liquid <br /> Lafayette, CA 94549 Reported Oct 30, 1995 <br /> Attention Tracy Faulkner Work Order 9510F27 10-19 p <br /> iQUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GC Batch# GC102495BTEX21A GC102495BTEX21A GC10249587EX21A GC1024953TEX21A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst B Sullivan 8 Sullivan 6 Sullivan S Sullivan <br /> MS/MSD# 9510AC605 951OA0605 9510AC605 9510A0605 <br /> Sample Conc N D ND N D N D <br /> Prepared Date 10/24/95 10/24/95 10/24/95 10/24/95 <br /> Analyzed Date 10/24/95 10/24/95 1a/24/95 10/24/95 <br /> instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 <br /> Conc Spiked 10ug/L 10pg/L 1opg/L 30u9/L <br /> Result 10 93 93 28 <br /> MS % Recovery 100 93 93 95 <br /> Dup Result 87 86 84 �5 <br /> MSD % Recov 87 86 84 $4 <br />' RPD 15 78 10 12 <br /> RPD Limit 0-50 0-50 0-50 0"50 <br /> LCS # - <br /> Prepared Date <br /> Analyzed Date <br /> ' Instrument I D # <br /> Conc Spiked <br /> LCS Result <br /> LCS % Recov <br /> M M D <br /> LCS 71 133 72-128 72130 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 /> XroliectMariager <br /> ALYTICAL preparation and analytsca[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 it <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> Interference the LCS recovery 1s to be used to validate the batch <br /> •'MS=Matrix Spike MSD=MS Duplicate RPD=Relative%Difference 951OF27 EEE <2� <br />