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United States Environmental Protection Agency
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New Source Review
Begin Hierarchical Links EPA Home > Air & Radiation > TTNWeb - Technology Transfer Network > New Source Review > Bulletins and Memos > PSD Abstracts and Memos > PSD Applicability 4.13 End Hierarchical Links

 

June 22, 1981 PSD Applicability 4.13

The first step for determining a net emissions increase is to assess if the modification itself will cause a significant increase in any regulated pollutant. If there will be a significant increase, the 5-year contemporaneous time period is triggered and all creditable increases and decreases during this period should be assessed. If after evaluating the creditable increases and decreases, there is still a significant increase in emissions PSD review applies. If the modification itself will not cause a significant increase, the contemporaneous time period is not triggered and PSD review will not apply.

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