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COLUMBIA -VNALYTICAL SERVICES, E'IC <br /> QA/QC Report <br /> Client kRCO Products Companv Service Request 5950941 <br /> Project 1775-706 00IITOn 17075 0012093 Tracv Date Collected 7/27/95 <br /> Sample Matnx ater Date Received 7/28/95 <br /> Date Extracted NA <br /> Date Analyzed 8/3-4195 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/Califorma DHS LUFT Method <br /> Percent Recovery <br /> Sample Name Lab Code a,a,a-Trifluorotoluene <br /> ATR-2 (28) 5950941-001 92 <br /> ATR-4 (25) 5950941-002 101 <br /> ATR-5 (26) 5950941-003 95 <br /> ATR-7 (26) 5950941-004 93 <br /> SMW-1 (18) 5950941-005 101 <br /> (MS) 5950936-004MS 91 <br /> (DMS) 5950936-004DMS 92 <br /> Method Blank 5950803-WBI 92 <br /> Method Blank S950804-WBI 90 <br /> CAS Acceptance Limits 69-116 <br /> 1 <br /> Approved By L= Date Cd 19 S <br /> SURU06299a <br /> Page 6 <br />