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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(435) 364 9233 <br /> 404 N Wiget 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 (9i6)921 0100 <br /> Pacific Environmental Group Client Project ID 320-135 1A/9-6171, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Maree Doden Work Order# 9509106 16, 17 Reported Oct 10, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC100395BTEXEXA GC100395BTEXEXA GC100395BTF-XEXA GC100395BTEXEXA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Garcia G Garcia G Garcia G Garcia <br /> MS/MSD # 9509F1904 9509F1904 9509F1904 9509F1904 <br /> Sample Conc N D IN D N D N D <br /> Prepared Date 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Analyzed Date 10/3/95 10/3/95 10/3/95 10/3/95 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Conc Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> Result 017 017 017 053 <br /> MS % Recovery 85 85 85 88 <br /> 0Dui? Result 018 018 0 16 055 <br /> MSD % Recov 90 90 90 92 <br /> RPO 57 57 57 37 <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 <br /> Control Limits 55-145 47-149 47-155 56-140 <br /> Please Note <br /> The LCS is a control sample of known, tnterferent-free matrix that is analyzed using the same reagents <br /> SEQUIPLA 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> `ill fXXXJ111I /I interference,the LCS recovery is to be used to validate the batch <br /> Brucie fetcher <br /> Project Manager "*MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9509106 PPP <3> <br />