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SEQUOIA ANALYTICAL <br /> fi ChesapeakeCity, CA 94063f <br /> i (415)354-9600 • FAX{41 a`7 364-9233 <br /> 4vs xvvr <br /> c->.�. c�•- <br /> �'`"`','''�.sA'x"�'er`3�ia,a£2u':'S'�f <br /> r1 RESNA Client Project IID W0475 13.Weber Point' <br /> 1710 Main Street f <br /> Escalon. CA 95320 x <br /> Attention. Tina Le Page OC Sample Group 209-0197 v. vv Reported' Se S. 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Efhyl- <br /> Beuene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst M Npp M Nipp M Nipp M N1pp <br /> Reporting Units Mg/L pg/L Mg/L pg/L <br /> Date Analyzed Sep 2, 1992 Sep Z 1992 Sep 2 1992 Sep 2, 1992 <br /> QC Sample# GBLK0902W G6LK090292 GOLK090292 GBLK090292 <br /> MS/MSD MS/MSo MS/MSD MS/MSD <br /> Sample Cone.: N D N D N D N D <br /> . Spike Con& <br /> Added: 10 10 10 30 <br /> Cane. Matriu <br /> Spike: 10 10 10 31 <br /> Matrix Spike <br /> %Recovery: 100 100 100 103 <br /> Conc. Matrix <br /> Spike Dup : 10 10 10 31 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 100 100 100 103 <br /> Relative <br /> %Difference: 00 00 00 00 <br /> • SEQUOIA ANALYTICAL %Fieoovegr Conc of M S -Cane of Sample a 100 <br /> Spike Conc Added <br /> Rafatrve%Ddterenee Conc of M S -Conc of MSD A 100 <br /> Marta Lee (Cone of M S + Conc of M S D)/s <br /> Project Manager 2090197 WAT <2> <br /> E# [Zb I Wd9 I :50 Z6-80-60 EEz6 C9£ S I b Al I:) aoom(1321 V I OM3S <br />