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3 fey 1' <br /> Se[]uoia 680 Chesapeake Drive Redwood City CJS 94063 (650)364-9600 FAX(650)364-9233 <br /> 15) Sequoia 404 N W Set lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-%73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92t-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> +mac•,."""ma yr �7, +o.care.:`..6 ux .`. Y .{"xv:.,t..,..... <br /> etder'-At n-`I�u`bhn ­Ctleni pr'6je6t'10' 7os66 SS#6981,St06iit0 ry <br /> 747 Sierra Court, Suite J Matrix Liquid r <br /> Dublin, CA 94568 <br /> -Attention Deanna Harding OC Sample Group 8071520-532 Reported Aug 11, 1998 , <br /> + i/¢4^Lv{4 i u\{4.v{-0.hw�.vhi�{J ySMxfk4n0 EY WCOArry✓�14 A%4rAYAfSSNE+S.rrvr s} y++v{i-/ + v �i+ti �t ivr x n ` xn K vK v n5 Cv40rvv C[tw� N n v}% :+A0.^hNF"vvh.} <br /> QUALITY CONTROL DATA REPORT -- <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO80498 GC080498 GCO80498 GCO80498 <br /> 802002A 802002A 802002-A 802002A <br /> Analy Method' EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD#: 8071856 8071856 8071856 8071856 <br /> Sample Conc : N D N D N D N D <br /> Prepared Date: 8/4/98 8/4/98 8/4/98 8/4/98 <br /> Analyzed Date. 8/4/98 8/4/98 8/4/98 8/4/98 <br /> Instrument 1.134. HP-2 HP-2 HP-2 HP-2 <br /> Conc. Spiked 20pg/L 20pg/L 20pg/L 60 jtg/L <br /> Result 24 24 25 72 <br /> MS % Recovery 120 120 125 120 <br /> Dup Result: 19 18 19 55 <br /> 0MSD %Recov : 95 90 95 92 <br /> RPD: 23 29 27 27 <br /> RPD Limit. 0.20 0.20 0-20 0-20 <br /> LCS# 2LCS080498 2LCS080498 2LCS080498 2LCS080498 <br /> I <br /> Prepared Date. 8/4/98 8/4/98 8/4/98 8/4/98 <br /> Analyzed Date. 8/4/98 8/4/98 8/4/98 8/4/98 <br /> Instrument LD #: HP-2 HP-2 HP-2 HP-2 <br /> Conc. Spiked: 20 jig/L 20yg/L 20pg/L 60pg/L <br /> LCS Result: 19 17 18 54 <br /> LCS % Recov.: 95 85 90 90 <br /> FVWMSD <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 matnx that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL, #1271 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 N <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 /> Julianne Fegley **M -Matnx Spike,MSD a MDuplicate, RPD=Relative%Difference <br /> Project Manager <br /> 8071520GET <17> <br /> f <br />