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v! d <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> c <br /> ARCO Products Company Service Request: 59600993 <br /> et• 2130 Stockton/#20805-114 006/T0#18957 00 Date Collected. 6118196 <br /> Sample Matra Air Date Received, 6119196 <br /> Date Extracted: NA <br /> Date Analyzed: 6120196 <br /> Duplicate Summary <br /> BTEX and Total Volatile Hydrocarbons <br /> Units uIA(ppmv) <br /> Sample Name Influent <br /> Lab Code 5960993-001 <br /> Duplicate Relative <br /> Sample Sample Percent <br /> Analvte MRL Result Result Average Difference <br /> Benzene 0 2 10 1 2 1 18 <br /> Toluene 01 40 40 40 <1 <br /> Ethylbenzene 01 9 2 95 9 3 <br /> Xylenes,Total 0 2 66 67 67 2 <br /> 1 Volatile Hydrocarbons <br /> Cl -C5 5 46 46 46 <1 <br /> C6-C12 5 510 510 510 <1 <br /> TPH as Gasoline* 5 510 510 510 <1 <br /> I <br /> Note ppmV=mg/m3 x [24 45 (gas constant)/molecular weight(MW)] <br /> MW Benzene=78,Toluene=92,Ethylbenzene= 106, Total Xylenes= 106 <br /> MW Gasoline= 100 <br /> * TPH as gasoline is defined as C6(benzene) through C12 (dodecane)and uses a <br /> molecular weight of 100 to calculate the ppmv <br /> DUPIS1060194 Page 8 <br />