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• COLUMBIA ANALYTICAL SERVICES, INC. „ <br /> QA/QC Report <br /> Client: EMCON Associates Date Received: 09/03/93 <br /> Project: EMCON Project No. OG71-033.01 Service Request No.: SJ93-1102 <br /> ARCO Facility No. 548 Sample Matrix: Water <br />• <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DMS LUFT Method <br />• <br /> Sample Name Date Analyzed Percent Recovery <br /> a,a,a-Trifiuorotoluene <br /> MW-1 (56) 09/14/93 94. <br /> MW-2 (61) 09/14/93 88. <br /> MW-3 (62) 09/14/93 87. <br /> MW-4 (63) 09/14/93 86. <br /> MW-5 (60) 09/15/93 107. <br />• MW-4 163} MS 09/14/93 87, <br /> MW-4 (63) DMS 09/14/93 84, <br /> Method Blank 09/14/93 84. <br /> Method Blank 09/15/93 $9, <br />• <br /> CAS Acceptance Criteria 70-130 <br />• <br />• <br />• <br /> • <br /> Approved by: v <br /> Date: <br />• 401}4 0;n.-......r...1 A.,^.,,^ . <.... �..._ r..r......._ r / <br /> 115�'1+ � T..I.._L-.-- in O.i"!T n.nn � _.. .no,• '+ nn� <br />