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CD) Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 411 Iger 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 /> Fugro West, inc Client Project ID 93471044, Exxon 7-0137 <br /> -1050 Melody Lane, Ste 160 Matrix Liquid <br /> ,Roseville, CA 95678 <br /> Attention Paul Graff Work Order# 9508A15-03, 05 Reported Aug 22, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#' GCO81895BTEX07A GCO818958TEX07A GCO81895BTEX07A GCO81895BTEX07A <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#: 9508A14W 950MI405 95MA1405 95MA1405 <br /> Sample Conc . N D N D N D N D <br /> Prepared Date: 8/18/95 8/18/95 8/18/95 8/18/95 <br /> Analyzed Date: 8/18/95 8/18/95 8/18/95 8/18/95 <br /> Instrument LD #: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked: 10 ug/L 10 pg/L 10 Ng/L 30 ug/L <br /> G Result: 84 85 82 25 <br /> MS %Recovery: 84 S5 82 83 <br /> Dup. Result: 92 93 90 27 <br /> MSD % Recov : 92 93 90 90 <br /> RPD: 91 90 93 77 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> iFry rr vGr l +. { w.W:. r r O c4 ` ry . crit . + • + x S r r r r { n .+i <br /> LCS#- - - <br /> Prepared Date: - - - <br /> Analyzed Date: - - - <br /> Instrument l.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 Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> E OlA 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 /> QJ1- , the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Cnte <br /> yY1W0 V 1 Irference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager **MS=Matrix Spike, MSD=NIS Duplicate RPO=Relative%Difference 9508A15 FFF <2> <br />