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i <br /> • 680 Chesapeake Drive Redwood Cary CA 94063 1650)364-9600 FAX{650)364-9233 <br /> T S e qu O1 a 404 N Wiget Lane Walnut Creek CA 94598 {925)988-9600 FAX(925)988-9673 <br /> Sig Striker Avenue Suite 8 Saaamento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Baa North Ste D PetSan turna� A 94954 (707)CA W70-41 I I (650)2.32 1 <br /> 865 FAX(707)792-0342 <br /> Analytical 1551 Industrial Road FAX(650)23Z-9612 <br /> Geiger-Ryan--Dublin ' N v 'Client Project lD iJnocal SS#5886, Stockion <br /> 6747 Sierra Court, Suite J Matrix Liquid <br /> Dublin,CA 94568 <br /> Attention Deanna Harding QC Sample Group 90605_40_-560 _ Reported Jun 17, 1999 <br /> x �r r i,, v � ,...,,. ++ o-__ ,.,i. � � vo ,, c ��„ ,..,.,,,.... »,. ..,. a ,. ,,a,r ,.,-•k an,..'a .. ,- ,-> s�,:<..�.,.< <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method EPA a020 EPA 8020 EPA Sam EPA 8020 <br /> Analyst 0 Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD <br /> Batch# 9060558 9060558 9060558 9060558 <br /> Date Prepared 6/10;99 6/10/99 6/10/99 6/10/99 <br /> Date Analyzed 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Instrument I D # HP-2 HP 2 HP-2 HIP 2 <br /> Conc Spiked 20 pg/L 20 u9/L 20Vg/L 60pg/L <br /> Matrix Spike <br /> %Recovery 100 90 85 98 <br /> Matrix Spike <br /> Duplicate /o <br /> Recovery 100 90 100 103 <br /> Relative % <br /> Difference 00 00 16 50 <br /> LCS Batch# 2LCS061099 2LCS061099 ZLCS061099 2LCS061099 <br /> Date Prepared 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Date Analyzed 6/10/99 6/10/99 6/10/99 6/10/99 <br /> Instrument I D # HP-2 HP 2 HP 2 HP 2 <br /> LCS % <br /> Recovery 95 90 90 98 <br /> %Recovery <br /> Control Limits 70.130 70.130 70-130 70-130 <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 preparation and analytical methods employed for the samples The matrix spike 1s an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure It <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> (� U interference the LCS recovery is to be used to validate the batch • <br /> ultanne Fegley <br /> Project Manager <br /> 9060540 GET <32> <br />