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Sequoia 680 Chesapeake flnve Redwood City,CA 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 /> Analytical <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ' Tech Services, Inc Client Project IDr Chevron 9-1918/960430-L1 ! <br /> 'Blaine985 Timothy Drive Matrix Liquid r <br /> San Jose, CA 95133 rx <br /> f¢ <br /> Attention Jim Keller Work Order# 9604K48-06 Reported May 10, 1996'„ <br /> r. nnvrr rr.ry rh`Wry'}rti r vti n ry tint nr tir, xxr r nrr,J r ' ti +r n + �v rr u+v � +} <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#: GCO50696BTEX20A GCO50696STEX20A GC050696BTEX20A G0050696BTEX20A <br /> Anally Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Pre Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst- J Woo J Woo J Woo J Woo <br /> MS/MSD# 9604H5103 9604H5103 96041-15103 96041-15103 <br /> Sample Conc.- N D N D N D N D <br /> Prepared Date 5/6/96 5/6/96 5/6/96 5/6/96 <br /> Analyzed Date. 5/6/96 5/6/96 5/6/96 5/6/96 <br /> Instrument LD#. GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc. Spiked- 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result: 83 84 84 25 <br /> MS %Recovery: 83 84 84 83 <br /> Dup. Result* 10 10 10 31 <br /> MSD % Recov.. 100 100 100 103 <br /> RPD: 19 17 17 21 <br /> RPD Limit. 0-25 0-25 0-25 0.25 <br /> ii.nr r}, +}>w}4r , , , r r { n r v Yn, ,.. r.r, r..,. ,. x.nr,• rna n r <br /> ~ > ryr\V4 rY\! x ' „ , t r ry r r , ,r, , v{r♦ rti , ,x ' r r r n . r .G`v <br /> LCS#/E: BLK050696 BLK050696 BLK050696 BLK050696 <br /> Prepared Date: 5/6/96 5/6/96 5/6/96 5/6/96 <br /> Analyzed Date: 5/6/96 5/6/96 5/6/96 5/6/96 <br /> Instrument I.D#: GCHP20 GCHP20 GCHP20 GCHP20 <br /> Conc Spiked: 10ug/L long/L 10ug/L 30ug/L <br /> LCS Result: 10 10 10 31 <br /> LCS % Recov.: 100 100 100 103 <br /> 60-140 60-140 60-140 60.140 <br /> LCS 70.130 70-130 70-130 70-130 <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 /> A A ALYTICAL 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 H <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 /> oPect <br /> en <br /> Manager w*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 96041<48 BLA a7> <br /> 1 <br />