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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 APR 2 3 <br /> 10 <br /> (510) 686-9600 • FAX (510) 685-9689 ENVIRONMENTAL. HEALTH <br /> :PEV!TISE.RVICES v. . <br /> :; ..r.. ... 30613&1-6, �. <br /> Mon Geosclerice <br /> Client Project ID: Rormer Mobs X04343/ <br /> t 5870 Stoneridge Drive, Suite 6 <br /> Pleasanton,CA 945881993 <br /> Attentlon• Stephan Rosen OC Sample Group 0597 <br /> 301 , <br /> 605 Report an , <br /> QUALITY CONTROL DATA REPORT <br /> i <br /> ANAL Eth* <br /> Diesel <br /> Toluene Benzene xylenes <br /> EPA EPA EPA EPA <br /> 8415/e020 9015/8020 8015/8020 EPA9015 <br /> Method: gots/8020 A.T. KWimer <br /> pU'ia": A.T. AT. A.T. <br /> Reporting Units: Pg/L POLL fp/L wh tq/L <br /> Jan 26. 1993 Jan 26, 1943 Jan 26. 1993 Jan 27, 1993 <br /> Date Analyzed: Jan 26, 1993 <br /> 3014D478OC Sample#: 301-04783014D478 3pt-0478 301-0478 lutatrix Blank <br /> Sample Conc.: N.D. <br /> N.D. N.D. N.D. N.D. <br /> Spike ConC. <br /> 2020 20 60 300 <br /> Added: <br /> Cone. Matrix 21 21 74 196 <br /> Spike: 70 <br /> Matrix Spike 105 105 123 65 <br /> %Recovery: 100 <br /> Coat.Matrix 21 21 72 182 <br /> Spike Dup.: 21 <br /> Matrix Spike <br /> Duplicate 105 105 120 S1 <br /> %Recovery: 105 <br /> Relative . <br /> %Difference: 4.9 0.0 0'0 2 7 6 3 <br /> pusllty Assurance Statement:All standard operatiing procedures and quality control requirernents have been met. <br /> SEOU ANALrnCAL ,c or LK- at a• x i0o <br /> RetS&A%Offersna: Cor►c.a 1u15 -Corn a fuf.gD, x too <br /> t o a + a 1 D. 2 <br /> 3010W-ALT <32> <br /> Project Manager <br />