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SENT BY: XEROX Telecopier 7017; 2-16-94 ;10:20AM 4153649233-4 12098363509;# 5 <br /> j SEQUOIA ANALYTICAL <br /> 880 Chesapeake Drive • Redwood CitY,CA 94063 <br /> (4.15) 364-9600 • FAX(416)364.9233 <br /> RE NA <br /> Client Project ID: 6W0385.02,Stockton SmRh nal <br /> 710 Main Street Matrix: Liquid <br /> rEll"scalon,.CA. 85320 <br /> ''A tention; John Lane OC Sample Group: 4B28101-5 <br /> r: Re rted; Feb 16 1994 <br /> QUALITY CONTROL DATA REPORT <br /> Al TKLM Benzene Toluene Ethyl Xylenes Dleael <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA a= EPA 8020 EPA 8015 <br /> Analyst: J.Minkel J.Minkel J. Minkel J.Minkel D.Tran <br /> MS/MSD <br /> Batch#: 4839702 4B397Q2 4939702 4839702 4826101 <br /> Date Prepared: - - 2/7/e4 <br /> Date Analyzed- 2/9/94 2/9/94 2/9/94 2/9/94 2/7/94 <br /> Instrument I.D,#: GCHP-3 OCHP-3 GCHP�3 GCHP4 OCHP-I; <br /> Conc.Spiked: 10,ug/L 10p2/L tons/L 301Q/L &)ONg/L <br /> Matrix Spike <br /> 4 =' %Recovery: 100 100 100 100 = <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: sa ee as 100 <br /> Relative 96 <br /> Difference. 4.1 a 2.0 2.0 0.0 <br /> LCS Batch#: _ - BLK020704 <br /> Date Prepared: - 2/7/94 <br /> Date Analyzed: - - 2/7/94 <br /> instrument I.D.#: GCHP-S <br /> LCS % <br /> Recovery: <br /> ecovery <br /> Control Limits: 71-133 72.128 72.730 71-120 28-122 <br /> WWI)affected by sample matrix. <br /> Please Note: <br /> The LCS Is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> �OUOIA ANALYTICAL preparation,and analytical methods employed for the sampisa. The matrix spike Is an aliquot of simple <br /> fortified with known quantities of speGfla oampounda and subjected to the entire arw,iytical procedure. If <br /> the recovery of analytes from the matrix spike does not fall within speolfied control limits due to matrix <br /> Vickie Tag e terference,the LCS recov.ory is to be used to validate the batch. <br /> Project Manager <br /> 4B2a101.WAT <3> <br />