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j SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood Crty.CA 94063 <br /> (415) 364-9600 FAX(415)364-9233 <br /> waterwork Client Project ID. w0367,icing Island Resorts on <br /> 1710 Main Street <br /> Fscalon,CA 95320 �, 1992 <br /> Attention: Tina LePage 0C Sample Group 204-3281 Reported: Apr <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method. EPA 8020 EPA 8024 EPA 8020 EPA 8020 <br /> Analyst: Kropp M.Npp h&Mpp IIA.Ntipp <br /> Reporting Units PDX M/L M/L PDX <br /> Date Analyzed. Apr 21, 1992 Apr 21. 1992 Apr 21, 1992 Apr 21, 1992 <br /> CIC Sample#: GBLKD42192 GBLK042192 GBLK042192 GBLK042M <br /> Sample Conc: N.D. N.D. N D N.D. <br /> Spike Cone. <br /> Added: 10 10 10 30 <br /> Conc. Matrix <br /> Spike: 94 9.4 95 28 <br /> Matrix Spike <br /> %Recovery: 94 94 95 93 <br /> Conc. Matrix <br /> Spike Dup.: 9.2 9.4 93 28 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 92 94 93 93 <br /> Relative <br /> %Difference: 22 0.0 2.1 0.0 <br /> 10SECIUOIA ANALYTICAL x Fk=very: Conc of M&-Cone.of Sampie x 100 <br /> Spike Cone.Added <br /> Q Retative%Difference Cmc of M S -Conc-of M S.D. x 100 <br /> (Conc of M S + Conc of M.S.D U 2 <br /> Folect Manager 204=1 wAT <7> <br />