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Y <br /> COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client EMCON Service Request S9600244 <br /> Project 2130 STOCKTON 21775-229 002/TO#19350 00 Date Collected 2/5/96 <br /> Sample Matnx Water Date Received 2/8/96 <br /> Date Extracted NA <br /> Date Analyzed 2/12/96 <br /> Surrogate Recovery Summary <br /> BTEX and TRH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> PID Detector FID Detector <br /> Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-Bromofluorobenzene a,m,a.—Tnfluorotoluene <br /> MW-1 (73) S9600244-001 89 110 <br /> MW-2 (72) S9600244-002 90 94 <br /> MW-3 (73) 59600244-003 96 94 <br /> MW-4 (74) 59600244-004 96 97 <br /> MW-5 (76) S9600244-005 94 100 <br /> MW-6 (72) S9600244-006 93 102 <br /> MW-7(72) S9600244-007 96 100 <br /> MW-I0(71) S9600244-008 85 107 <br /> Method Blank S960212-NM 95 91 <br /> Method Blank 5960214-MB 94 92 <br /> CAS Acceptance Limits 69-116 69-116 <br /> SM27060194 <br /> Page 5 <br />