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Sequoia 680 Chesapeake Dnve Redwood Cry,CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> a) 404 N Wiget Lane Walnut Creek CA 94598 (510) 968 9600 FAX(510) 985-9673 <br /> war Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921-0100 <br /> Fugro West, Inc Client Project ID 93471044, Exxon 7-0137 <br /> 1050 Melody Lane, Ste 160 Matrix Liquid <br /> Roseville, CA 95678 <br /> 'Attention Paul Graff Work Order# 9508A15 -01, 02, G4, 06, 07 Reported Aug 22, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC BatCh# GCO81795BTEX06A GC0817958TEX06A GCO81795BTDMA GCO81795STEX06A <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#- 950888605 950888605 950888605 950888605 <br /> Sample Conc . N D N D N D N D <br /> Prepared Date 8/17/95 8/17/95 8/17/95 8/17/95 <br /> Analyzed Date 8/17/95 8/17/95 8/17/95 8/17/95 <br /> Instrument I.D.# GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc. Spiked: 10pg/L 1Oug/L lope/L 30pg/L <br /> Resuft. 99 99 98 30 <br /> . MS %Recovery: 99 99 98 100 <br /> Dup. Result: 10 10 10 31 <br /> MSD % Recov.. 100 100 100 103 <br /> RPD: 10 10 20 33 <br /> RPD Limit: 0-50 0-50 0-50 0-50 <br /> LCS #- - - - <br /> Prepared Date - - - <br /> Analyzed Date - - <br /> Instrument LD # - - <br /> Conc. Spiked - - - - <br /> LCS Result - - - <br /> LCS % Recov - - - <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> Please Note <br />. The LCS is a control sample of known,mterterent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA 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 matnx <br /> interference,the LCS recovery is to be used to validate the batch <br /> ickie(ague Clark <br /> Protect Manager "MS=Matnx Spike,MSD=MS Duplicate,RPD=Relative%Difference 9508A15 FFF <1 <br />