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i <br /> COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br /> Client ARCO Products Companv Servwe Request 59600301 <br /> ProICLt 2130 Stockton/20805-114 0041TO#18957 00 Date Collected 2/21196 <br /> Sample Matrix Vapor Date Received 2/22196 <br /> Date Extracted NA <br /> Date Analvzed 2123196 <br /> Duplicate Summary <br /> BTEX and Total Volatile Hvdrocarbons <br /> Units 111g/m3 <br /> Sample Name INFLUENT <br /> Lab Code 59600301-001 <br /> Duplicate Relative <br /> Sample Sample Percent <br /> Analvte MRL Result Result Avera-c DdferenLc <br /> Benzene 0 5 18 l8 18 <1 <br /> Toluene 05 100 100 100 <1 <br /> Ethvlbenzene 0 5 24 24 24 <l <br /> Xylenes Total 1 200 200 200 <1 <br /> Total Volatile H%drocarbons <br /> Ct -C4 Hvdrocarbons 20 <200 <200 -- -- <br /> CS - Cs Hvdrocarbons 20 2,600 2,600 2,600 <1 <br /> C9 -C,.Hvdrocarbons 20 630 710 670 12 <br /> Gasoline Fraction (Ci-C,2) 60 3,200 3 300 3 250 3 <br /> Note ppmV=mg/m3 \ 124 45 (gas constant)/molecular weight (MW)l <br /> MW Benzene= 78 Toluene= 92 Ethvlbenzene= 106, Total Xvlenes= 106 <br /> MW Gasoline= 89 <br /> UUP I SJOb0194 <br /> Page 6 <br />