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6D— <br /> Sequoia 680 Chesapeake Dnve Redwood GM CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek C4 94599 (510) 988-9600 FAX(510)988%73 <br /> AQFAnalytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-96W FAX(916)921-0100 <br /> v u y <br /> Canonie Envlranmental Client Project 1D 94-367, Stockton Fire#2+ u <br /> 7901 Stonendge Drive, Surte 100 Matnx Liquid <br /> Pleasanton, CA 94588 <br /> Attention John Lane Work Order# 9503,154-03-4 Reported Apr 19, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> GIC Batch#' GC032895BTEX07A GCO32895BTEX07A GCO32895BTE WA GC032895BTEX07A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: M Matt! M Balath M Balath M Balatti <br /> MS/MSD#: 950316103 950316103 950316103 950316103 <br /> Sample Cone.: N D N D N D N D <br /> Prepared Date: 3/28/-95 3/28/95 3/28/95 3/28/95 <br /> Analyzed Date: 3/28/95 3/28/95 3/28/95 3/28/95 <br /> Instrument I.D #: GCHP7 GCHP7 GCHP7 GCHP7 <br /> Cone Spiked: lou$/L 10 fig/L 101.ig/L 30pg/L <br /> Result: 10 11 10 32 <br /> MS % Recovery: 100 110 100 107 <br /> Dup. Result: 10 10 10 30 <br /> MSD %Recov.: 100 100 100 100 <br /> RPD: 00 95 00 as <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 /> LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> Mease Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA AN YTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> for•hiied wrth known quantities of specific compounds and subjected to the entire analytical procedure H <br /> L��1�� �� 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 /> Vickie Tague Clark <br /> Project Manager '*MS=Matrix Spike,MSD=MS Duplicate,RPD-Relative%Difference 9503.154 CAN <4> <br />