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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Compatty Service Request: S951356 <br /> Protect- 1775-706 001 /TO# 17075 00/ 2093 Tracv Date Collected- 10/26 27195 <br /> Sample Matrix Water Date Received: 10/31/95 <br /> Date Extracted: NA <br /> Date Analyzed. 11/1-3/95 <br /> Surrogate Recovery Summary <br /> BTEX and TPH 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 Codi 4-Bromotluorobenzene (x,a,a—Tnfluorotoluene <br /> A4634 ATRI pp S95I355-001 100 97 <br /> A4634 ATR-2 pp 5951355-002 96 93 <br /> A4634 ATR4 pp 5951355-003 87 96 <br /> A4634 ATR5 pp 5951355-004 I06 102 <br /> . A4634 ATR6 pp 5951355-(105 103 91 <br /> A4634 ATR9 pp 5951355-006 100 91 <br /> A4634 TEX1 pp S951355-007 104 98 <br /> A4634 ATR4 ppd S951355-009 88 109 <br /> A4634 ATR7 pp S951355-009 97 92 <br /> A4634 ATR7 pp(MS) 5951356-009MS 96 102 <br /> A4634 ATR7 pp (DMS) S951356-009DMS 99 99 <br /> Method Blank S951101-WB 93 101 <br /> Method Blank 5951102-WB 102 96 <br /> CAS Acceptance Limits 69-116 69-116 <br /> * The surrogate used for this sample was 4-bromotluorobenzene <br /> sunvoaoi� <br /> Page 5 <br />