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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(5 10) 988 9673 <br /> �l Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> a I <br /> E A Engineering Science &Tech Client Protect ID Exxon 7-3942/83739 42 <br /> 3841 N Freeway Blvd , Ste 145 Matrix Liquid <br />' Sacramento, CA 95834 x <br /> Attention Kyriacous Kyrlacou Work Order # 9508117-11, 13-16, 19, 950&118-01 Reported Sep 5, 1995 r <br />' QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCG82895BTEX06B GCO82895BTEYD6B GCO82895STEX06B GCO82895BTEX06B <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 Geckler R Geckler R Geckler R Geckler • <br /> MS/MSD #. 950BEG403 95ME0403 9508EO403 9508EO403 <br />' Sample Conc. N o N D N D N D <br /> Prepared Date 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Analyzed Date, 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Instrument I.D.#- GCHP6 GCHP6 GCHP6 GCHP6 <br />' Conc. Spiked 10ug/L tang/L 10ug/L 30Ns/L <br /> Result 88 88 88 26 <br /> IVIS % Recovery 88 88 88 87 <br /> Dup Result. 92 92 82 27 <br /> MSD % Recov .. 92 92 82 90 <br />' RPD 44 44 71 38 <br /> RPD Limit 0-50 0.50 0-50 0-50 <br /> LCS <br /> Prepared Date- - - <br /> Analyzed Date- <br /> Instrument 1 D.# <br /> Conc. Spiked <br /> LCS Result - - <br />' LCS % Recov.. - - - - <br /> t <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 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 /> 01A 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 />' Pegg P er <br /> Protect Manager "'MS=Matrix Spike MSD=IVIS Duplicate RPD=Relative 96 Difference 9508.717 EEE ,:3> <br />