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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: EMCON Service Request: 1952343 <br /> Project: ARCO Products Company#2168/#0805-146 04 Date Collected: NA <br /> LCS Matrix: Water Date Received: NA <br /> Date Extracted: NA <br />' Date Analyzed: 5/16/95 <br /> Laboratory Control Sample Summary <br />' Reactive Sulfide <br /> Method SW846 7 3 4 2/376 2 <br /> Louts mg/L (ppm) <br />' CAS <br /> Percent <br />' Recovery <br /> True Percent Acceptance <br /> Anaiyte Value Result Recovery Limits <br />' Reacuve Sulfide 1 141 0 790 69 50-120 <br /> b <br /> 1 <br /> NA Not Applicable <br /> SW Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846,Thud Edition, 1986 <br /> Approved By o L Date 9 <br />' LCS/11617194 <br /> L,952343 xi.5 grnkst 5/19193 Paf !pop No <br /> 6925 CANOCA AVENUE )♦ CANOGA PARK, CA 91303 ■ 818 587-5550 ■ FAX 818 587-5555 <br />