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COLUM81A ANALYTICAL SERVICES, INC. <br /> Client: EMCON Associates <br /> Project: EMCON Project No. 0G.71-029.01 Date Received: 71/30/93 <br /> Service.Request No.: SJ93-1 453 <br /> ARCO Facility No. 2130 Sample Matrix: Water <br /> Surrogate recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030,'8020"California DHS LOFT Method <br /> E <br /> E <br /> E <br /> Sarni le Name Date.Analyzed Rerc@nt Recover <br /> a,a,a-Trifduorotofuene <br /> MW-1 (73) 12106%93 92. <br /> MW-2 (71) .12/06/-'93 1 13. <br /> MW-3 {72} 12/06193 83, <br /> MW-5 175Y <br /> 12/0.7/93 gg <br /> MW-6::;72} 12107x93 90. <br /> :MW-.7..x7.2} 12-/06/93 80. <br /> 12/060-'93. 75. <br /> MW-1 0 (71] 12/07/93" 101 , <br /> MS 12/06/93 87. <br /> DMS 12/"06/93 87 <br /> mMethod Blank 1.21'06,'93 U8 <br /> Method Blank 1.2!07,'93 36, <br /> CAS'.Acceotance Criteria 70-13.0 <br /> two <br /> Approved by: V1 G /IGf.' Date: &rrolAr- ! ,/Y <br />