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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 Creck CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> IAnalytical 819 Striker Avenue Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Environmental Group Client Project ID 310-097 1A/0123,Tracy <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Maree Doden Work Order# 9505F62 31, 36-43 Reported Jun 7, 1995 - <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> CC Batch# GCO5259513TEXEXC GC052595BTE EXC GCO52595BTEXEXC GC052595BTEXEXC <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst S Mann S Mann S Mann S Mann <br /> MS/MSD# 9505A4011 9505A4011 9505A4011 9505A4011 <br /> Sample Conc. N D N D N D N D <br /> Prepared Date. 5/25/95 5/25/95 5/25/95 5/25/95 <br /> Analyzed Date 5/25/95 5/25/195 5/25/95 5/25/95 <br /> I Instrument I D # GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conc Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> Result 017 0 17 0 18 053 <br /> MS % Recovery- 85 85 90 88 <br /> Dup Result 016 017 017 051 <br />' MSD % Recov so 85 85 85 <br /> RPD 61 00 57 38 <br />' RPD Limit. 0-50 V 0-50 G-50 0-50 <br />' <br /> Prepared Date <br /> ate <br /> Analyzed Date: <br />' Instrument LD #: <br /> Conc. Spiked: <br /> LCS Result <br />' LCS % Recov. <br /> tLCS <br /> Control LeMdS 55-145 47-149 47-155 56-140 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> UOl ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> /7( fortified with known quantities of specific compounds and subjected to the entre analytical procedure if <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matnx <br /> interference,the LCS recovery is to be used to validate the batch <br /> Eileen A. Manning <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relatve%Difference 9505P62 PPP <4a <br />