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Sequoia va0 Cneupcakc Drive Redwood City CA 94063 415) 354-9600 FAX '415) 364-9233 <br /> 41J4 N WIget lane Walnut Creek CA 94598 (5t0) 988 9600 FAX (510) 988-9673 <br /> AnalyticalFAX (916) 92 t 0100 <br /> 319 Sinker avenue Suited 5acramenta G 95834 9161 921 9600 <br />• <br /> Delta Environmental Consultants Cilent Project ID Gaon 7-3708, Stockton <br /> 3330 Data Drive Matrix Liquid <br /> Rancho Cordova CA 95870 <br /> Attention Todd Gaiat) Work Order # 9507936 01-08 Reported Jul 25. 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyi Xylenes <br /> Benzene <br /> QC Batch#' GC072095$TEX03A GCO720958TEC03A GC0720958TEX03A GC0720958TEC03A <br /> Analy. Method. EPA 8420 E=A 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EaA 5030 E=A 5030 EPA 5030 <br /> Analyst: J Minkei J Minkei J Minkel J Minkel <br /> MS/MSD #• 950724809 950724809 950724809 950724809 <br /> Sample Conc.. N o N 0 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 l.D # GCHP3 GCHP3 GCHP3 GCHP3 <br /> Conc. Spiked- t0 pg/L 10 Mg/L t0►ug/L 30 F+9/L <br /> Result: 99 10 97 30 <br /> MS % Recovery' 99 100 97 100 <br />. Dup. Resul! 96 95 95 29 <br /> MSD % Recov 96 95 95 97 <br /> RPD. 3 1 51 2.1 34 <br /> RPO Limrt• 0-50 0-50 0-50 0-50 <br /> _ A <br /> HW`++:v ev+�Jr v ti v r. lrnvti V..w `?l~ 4r4 n ir^ +y.V+t r r r 4x` • r..+n iAnsv'J r <br /> + rr 4v4 rix r rnh r Nr yr r v+n <br /> LCS #' <br /> Prepared Date: <br /> Analvzed Date: <br /> Instrument l.D.#: <br /> Conc. Spiked. <br /> LCS Result: <br /> LCS % Recov. <br /> LCS 71-138 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 /> SEQUOIA A ALYTICAL preparation, and analydcal methods employed for the samples The matnx spike is an aliquot of sample <br /> fortfied with known quantities of specrfic compounds and subjected to the ermre analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall wrthln specified control limrts due to matnx <br /> interference the LCS recovery is to be used to validate the batch <br /> Mike Gregory <br /> Project Manager "MS=Matrix Soike MSD=MS Quplieate,RRD=Relative%Difference 9507536 GLT <I> <br />