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® SEQUOIA ANALYTICAL <br /> . 680 Chesapeake Drive • Redwood City,CCA 94063 <br /> (415)364-9600 • FAX(415)364-9233 <br /> to erwo Cl esat roject D 375,Chevron,Stockton <br /> 1710 Maln Street <br /> Escalan,CA 95320 <br /> �Attf3r1t1o11 Tisa LePage oc SamF:�Group 1051338.1340 Re 1�d•Ma �. taai <br /> QUALITY CONTROL DATA REPORT <br /> ANAL E-M* <br /> Benzene Tokone hentene k 4enas <br /> EPA EPA EPA t'PA <br /> Method 8015/8040 8015/8020 8016/8= 8015 i 804f3 <br /> Analyst S Hoffmann S Hfoftrnann Hoffmann S.Hof ,=n <br /> Reporting Emits. no no no n0 <br /> Date Analyzed May 13, 1991 May 13, 1991 May 13, 1991 May f3. 1991 <br /> QC Sample il#. GBLK 051391 GOLK 051391 GBLK 051891 GbLK 051391 <br /> i r <br /> Sample Conc: ND N D. N D N D <br /> • Spike Cone. <br /> Added: 100 100 100 300 <br /> . Conc. Matrix <br /> Spike: 100 100 100 310 <br /> Matrix Spike <br /> %Recovery: 100 100 100 100 <br /> Conc.Matrix <br /> Spike Dup.-. 100 100 100 320 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery- 100 100 100 110 <br /> Relative <br /> %Difference: 00 00 00 32 <br /> 5E 1A ANALYTICAL %Recove y Cone of M 5 - c of pia x 100 <br /> ' Spike Cone Added <br /> . Relative%omerenoa Cono of M S -Cone of M&D x 100 <br /> t a __ "Conc of M ♦Cone of M D) 2 <br /> Arojet Manager 1051338 WA3 <3> <br />