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4Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9640 FAX(415) 364 9233 <br /> I���rrr... 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 5tnkerAvenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 ot00 <br /> ,{. . r r ,. { ,y v s n r J ♦ v , 4, tit r r <br /> Env1ros hnn. " { r Client Project ID Shell 141 N El Dorado, Stocky <br /> 270 Perkins Ave Matrix Solid <br /> Sonoma, CA 95476 <br /> 'Attention Joe Neely Work Order# 9604465 -01 Reported Apr 19, 1996 , <br /> v 4 } nr r rr. r rn• ri v r ! 3 n r v ,r r r v r r n <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GC040896BTEXEXB GC040896BTEXEXB GCO40896BTEXEXB G0040896BTEXECB <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: E Cunanan E Cunanan E Cunanan E Cunanan <br /> MS/MSD#- 96031-172-06 96031-172-06 96031-172-06 9603H72-06 <br /> Sample Conc . N D N D N D N D <br /> Prepared Date: 4/8/96 4/8/96 4/8/96 4/8/96 <br /> Analyzed Date: 4/8/96 4/8/96 4/8/96 4/8/96 <br /> Instrument I.D #: GCHPi GCHP1 GCHP1 GCHP1 <br /> Conc Spilled 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> Result: 018 018 018 054 <br />• MS % Recovery: 90 90 90 90 <br /> Dup. Result 018 018 018 054 <br /> MSD % Recov. 90 90 90 90 <br /> RPD: 00 00 00 00 <br /> RPD Limit, 0-50 0.50 0-50 0.50 <br /> LCS#' GBLK040896BS GBLK040896BS BLK040896BS GBLK040896BS <br /> Prepared Date: 4/8/96 4/8/96 4/8/96 4/8/96 <br /> Analyzed Date: 4/8/96 4/8/96 4/8/96 4/8/96 <br /> Instrument I D #' GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked: 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> LCS Result: 019 019 019 055 <br /> LCS % Recov.: 95 95 95 92 <br /> LCS <br /> Control Limits 50-150 50-150 50-150 50-150 <br /> Please Note <br /> The LCS is a control sample of known,Interferent-fres matrix that is analyzed using the same reagents, <br /> . SEQUOIA ALYTICAL 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 /> Mike Gregory <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9604465 EEE <1> <br />