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ei� Sequoia 680 Chesapeake Dnve Redwood City,C4 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> *,IIF Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments Client Project ID Chevron 9-8264/8264-1 <br /> 6280 Stoneridge Mall Rd , B211 Matrix Solid <br /> Pleasanton, CA 94588 <br /> Attention Anne Marie Dockstader Work Order# 9511587-17 Reported Nov 16, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte PCB 1260 Total Recoverable <br /> Petroleum Hydrocarb <br /> OC Batch# GC110795OPCBEXA OP1109955520EXA <br /> Analy Method EPA 8080 SM 5520 EF MOD <br /> Prep Method EPA 3550 EPA 3550 <br /> Analyst A Sawa C Garde <br /> MS/MSD # BLK110795 951156001 <br /> Sample Conc N D 260 <br /> Prepared Date 11/7/95 11/9/95 <br /> Analyzed Date 11/8/95 11/10/95 <br /> Instrument I D # GCPE5 Manual <br /> Conc Spiked 83pg/Kg 500 mg/Kg <br /> Result 95 1000 <br /> MS % Recovery 114 148 <br /> iDup Result 100 1200 <br /> MSD % Recov 120 188 <br /> RPD 50 36 <br /> RPD limit 0-50 0-50 <br /> LCS # BLK111095 BLK110995 <br /> Prepared Date 11/10/95 11/9/95 <br /> Analyzed Date 11/10/95 11/10/95 <br /> Instrument I D # GCPE5 Manual <br /> Conc Spiked 83pg/Kg 500mg/Kg <br /> LCS Result 78 480 <br /> LCS % Recov 92 96 <br /> D 60-140 <br /> LCS 30-150 70-110 <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 /> SE DIA 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Mark Cargasacchl <br /> Project Manager MS=Matrix Spike MSD=MS Duplicate,APD=Relative%Difference 9511587 TTT <4n <br />