AMADOR COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 411 - EMISSION OFFSET ELIGIBILITY
A. Except in the case of seasonal sources, emissions offset quantities shall be calculated on annual, and daily bases. For seasonal sources, emission offset quantities shall be calculated on the basis of the season date span of operation, and daily emission rate, either estimated for proposed sources or averaged over the two year period preceding the date of application, or other appropriate periods as determined by the Air Pollution Control Officer, for existing sources.
B. Emission offsets may be developed by the reduction of emissions from existing stationary, and non-stationary sources. Offsets from stationary sources not exempt from the provisions of Rule 501 shall be certified by the Air Pollution Control Officer through conditions attached to the Permits to Operate of the emission-reducing sources. Offsets from non-stationary sources, and exempt stationary sources shall be certified by the Air Pollution Control Officer through new facility Permit to Operate conditions, contracts, or other means deemed adequate by the Air Pollution Control Officer. Such emissions offsets shall take effect no later than 120 days after initial operation of the new facility or modification.
C. The ratio of emission offsets to the emission from a new facility or modification
D. If an applicant certifies that the proposed new facility or modification is a replacement
for a facility or source which was shut down or curtailed after January 1, 1981, emission reductions associated
with such shutdown or curtailment may be used as offsets for the proposed facility or modification. Sources which
were shut down or curtailed prior to January 1, 1981, may be used to offset emissions increases for replacements
for such sources, provided that:
E. Notwithstanding any other provisions of this rule, any emissions reductions not otherwise authorized by this Rule may be used as offsets or emission increases from the pro- posed facility or modification provided that the applicant demonstrates to the satisfaction of the Air Pollution Control Officer that such reductions will result in a net air quality benefit in the area affected by emissions from the new facility or modification.
F. Emissions reductions resulting from measures required by adopted federal, state, or District laws, rules or regulations shall not be allowed as emissions offsets unless a complete application incorporating such offsets was filed with the District prior to the date of adoption of the laws, rules or regulations.
G. Emissions reductions of one precursor may be used to offset emissions increases of another precursor of the same secondary pollutant provided that the applicant demonstrates to the satisfaction of the Air Pollution Control Officer that the net emission increase of the latter precursor will not cause a new violation, or contribute to an existing violation, of any national ambient air quality standard. The ratio of emission reductions between precursor pollutants of the same secondary pollutant shall be determined by the Air Pollution Control Officer based upon existing air quality data.