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Sequoia Redwood City C.A 94063 (415) 364-9600 FAX 1415) 364-9233 <br /> 080 N Wigeakc Drive FAX (510) 988 9673 <br /> 15) +ua ,V W'rget Lane Walnut Creek CA 9454Ei 15101 988 9600 <br /> Analytical 919 Sinker avenue Suitc 3 Sacramento C?. 95834 1916) 921 9600 <br /> FAX(916) 921 0100 <br /> Delta Environmental Consultants Client Project !D Exxon 7-3708, Stockton <br /> 3330 Data Drive Matrix Liquid <br /> Rancho Cordova CA 95670 Reported Jul 25 1995 <br /> Attention Todd Gaiatr Work Order 9507936 01-08 P <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: <br /> Benzene <br /> Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC0720958TD(03A GC072095STE(03A GC07209513TE(03A GC0720958TOWA <br /> Anaiy. Method: EPA 8020 <br /> CPA 8020 E°A 8020 EMA 8020 <br /> Prep Method. EPA 5030 EDA 5030 EPA 5030 EPA 5030 <br /> Analyst: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD #' 950724809 950724809 950724809 950724809 <br /> Sample Conc.. N D N€] N D N D <br /> Prepared Date: 7/20/95 7/20/95 7/20/95 7/20/95 <br /> Analyzed Date 7/20/95 7/20/95 7/20/95 7/20/95 <br /> Instrument LD #' GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked. taus/L 10 Fis/L io ns/L 30 Wg/L <br /> Result: 99 10 9 7 30 <br /> MS % Recovery 99 t00 97 100 <br /> Dup. Result: 9 6 95 95 <br /> MSD % Recov . 96 95 95 97 <br /> RPD 31 51 21 34 <br /> RPD Umrt: 0-50 0-50 0-50 0-50 <br /> f } ry nr. n r L Y h ,. r e..h~ J • .v }..r ` v '}.Y YJ t rY ' I <br /> LCS #' <br /> Prepared Date: <br /> Analyzed Date: <br /> Instrument I.D.#' <br /> Conc. Spiked. <br /> LCS Result <br /> LCS % Recov.. <br /> ' LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> Please Note <br /> te <br /> The LCS is a control sample of known, inrterent free matnx that 1s analyzed using the same reagents <br /> SEQUOIA A ALYTICAL preparation,and analytical methods employed far the samples The matrix spike i$an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire an alyncal procedure tf <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 /> Protect Manager '*MSsMatrix Splice MSD=NIS Duplicate RPO=Relative%Difference 9507536 DLT <11> <br /> -7:- <br />