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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client Arco Product Companv Service Request: S9501451 <br /> Protect: 1775-212 001/TO#17075 00/760 Lodi Date Collected: 11/15/95 <br /> Sample Matrix- Water Date Received: 11/16/95 <br /> Date Extracted: NA <br /> Date Analyzed: 11/29/95 <br /> Surrogate Recovery Summary <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUF1'Method <br /> PID Detector FID Detector <br /> Percent Recovery Percent Recovery <br /> Sample Name Lab Code 4-Bromofluombenzene cx,a,a—Trtfluorotoluene � <br /> MW-1 (72) <br /> 59501451-00 1 89 97 <br /> MW-2 (73) 59501451-002 94 99 <br /> MW-3 (74) 59501451-003 97 95 <br /> Method Blank 951129-WMB 88 96 <br /> s <br /> CAS Acceptance Limits 69-116 69-116 <br /> *The surrogate used for this sample was 4-Bmmotluortbenzene <br /> SURTO 0194 <br /> Page 7 <br />