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- By CategoryMixed GasesGas Comp Amount220.9000000Gas Comp Amount190.9895000 99.9989000 99.9460000 99.8920000 99.9965000 99.9595000 99.6670000 79.1000000 99.9899940 99.9982000 99.9659000 99.9320000 53.7860000Gas Comp 1PPM HYDROGEN SULFIDE NITRIC OXIDE NITROGEN DIOXIDE NITROGEN PPM CHLORINE