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COLUMBIA ANALYTICAL SERVICI NC. <br /> QA/QC Report <br /> Client: Equiva Services Service Request: S9901977 <br /> Project: SAP:121258/Incident:88870583 Date Collected: NA <br /> Sample Matrix: Soil Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed: NA <br /> Surrogate Recovery Summary <br /> TPH as Gasoline <br /> Prep Method: EPA 5030 Units: PERCENT <br /> Analysis Method: CA/LUFT Basis: NA <br /> Test Percent Recovery <br /> Sample Name Lab Code Notes a,a,a-Trifluorotoluene <br /> SP-IA S9901977-001 101 <br /> SP-IB S9901977-002 84 <br /> SP-2A S9901977-003 90 <br /> SP-213 59901977-004 98 <br /> SP-3A 59901977-005 94 <br /> SP-3B S9901977-006 96 <br /> SP-4A 59901977-007 95 <br /> SP-4B 59901977-008 97 <br /> SP-5A 59901977-009 99 <br /> SP-5B 59901977-010 97 <br /> SP-6A 59901977-011 92 <br /> SP-6B S9901977-012 94 <br /> SP-7A 59901977-013 99 <br /> SP-7B 59901977-014 102 <br /> SP-8A 59901977-015 100 <br /> SP-813 59901977-016 99 <br /> SP-9A 59901977-017 93 <br /> SP-9B S9901977-018 96 <br /> Method Blank S990630-SBI 108 <br /> Method Blank 5990630-SB2 108 <br /> SP-IA 59901977-001 MS III <br /> SP-IA S9901977-001 DMS 108 <br /> CAS Acceptance Limits: 51-137 <br /> Approved By: Date: <br /> SURI/020597p <br /> Page 11 <br />