40 CFR 86.1544 - Calculation; idle exhaust emissions.
prev | next
(a) The final idle emission test results shall be reported as percent for carbon monoxide on a dry basis.
(1) Use the procedures, as applicable, in 40 CFR 1065.650 to determine the dilute wet-basis CO and CO2 in percent.
(2) Use the procedure, as applicable, in 40 CFR 1065.650 to determine the raw dry-basis CO2 in percent.
(3) Convert the raw dry-basis CO2 to raw wet-basis. An assumption that the percent of water by volume in the raw sample is equal to the percent of raw dry-basis CO2 minus 0.5 percent is acceptable. For example:
10.0% dry CO2−0.5%=9.5% water
(1.00−0.095) (10.0% dry CO2)=9.05% wet CO2
(5) Convert the dilute wet-basis CO to dilute dry-basis values. An assumption that the percent of water by volume in the sample bag is 2 percent is acceptable. For example:
Dilute dry CO=(dilute wet CO)/(1.00-0.02)
Raw dry CO=(DF) (dilute dry CO)
(c) If the raw exhaust sampling and analysis system specified in 40 CFR part 1065 is used, the percent for carbon monoxide on a dry basis shall be calculated using the procedure, as applicable, in 40 CFR 1065.650.
(Secs. 202, 203, 206, 207, 208, 301a, Clean Air Act, as amended; 42 U.S.C. 7521, 7522, 7525, 7541, 7542, 7601a)
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.