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July 31, 1981 Policy Determinations Regarding PSD Questions 2.18

Is a source reactivation subject to PSD (see PSD/117).
The complete list of organic compounds not considered photochemically reactive and, therefore, not a VOC for purposes of PSD is detailed.
Construction of a major source in a nonattainment area projected to be attainment (based on the approved Part D SIP) before startup, is not subject to PSD or Part D requirements.
Determination of modeling baseline air quality levels for 3-hour and 24-hour averages is discussed.
If an ambient monitor has been shut down, data obtained may still be deemed pertinent and useful under certain conditions.
A minor source which locates within a PSD area and impacts a nearby PSD area may trigger baseline and consume increment within each of the areas under certain conditions.
A minor source which adds a major emission point could not escape PSD by considering previous decreases which cause the net increase to be less than the major source threshold.
An existing source may change its designation from major to minor by accepting a Federally enforceable limitation.
The 50 tons per year exemption under 40 CFR 52.21(i)(7) cannot be claimed for an emission increase of any pollutant unless the increase of each pollutant is less than 50 tons per year.
The air quality de minimus level for NO2 is 14 g/m3 annual average, as stated in the published version of the regulation.

Notebook Entries: 10.23; 3.19; 4.19; 5.10; 6.11; 7.5

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