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- By CategoryMixed GasesGas Comp 3PPM BENZENEGas Comp Amount178.6500000 99.9065000 99.9983000 90.9895000 99.0000000 79.7450000 82.9991500 70.0000000 99.9650000 87.0000000 99.7100000 95.0000000 93.2000000 99.6894000 99.9984000 99.9899880 79.6800000 99.9992500 99.9825000Gas Comp 1PPM PHOSPHINE PPM CARBON MONOXIDE NITROGEN DIOXIDE HELIUM 3 AIR CARBON MONOXIDE NITROGEN