New York Department of Environmental Conservation (NYDEC)

EPA designated Chautauqua County in Jamestown, NY as marginal nonattainment for ozone. The counties of Bronx, Kings, Nassau, New York, Queens, Richmond, Rockland, Suffolk and Westchester are classified as moderate nonattainment for ozone. The county of New York is assigned as moderate nonattainment for PM10.

ERCs are available for six different pollutants:

Pollutant Major facility thresholds for
nonattainment areas and the
ozone transport region
Nitrogen oxides (NOx) >100 tons/year (Marginal-Moderate)
25 tons/year (Severe)
Volatile organic compounds (VOC) >50 tons/year (Marginal-Moderate)
>25 tons/year (Severe)
Sulfur dioxide (SO2) >100 tons/year
Carbon monoxide (CO) >100 tons/year
PM10 >100 tons/year
PM2.5 >100 tons/year
Pollutant Significant net emission
increase thresholds for
moderate nonattainment areas
Nitrogen oxides (NOx) >40 tons/year
Volatile organic compounds (VOC) >40 tons/year
Sulfur dioxide (SO2) >40 tons/year
Carbon monoxide (CO) >100 tons/year
PM10 >15 tons/year
PM2.5 >10 tons/year

New or modified major facilities in nonattainment areas must obtain ERCs to satisfy the offset ratio requirements for proposed emission increases. The offset ratios for marginal nonattainment area for ozone is 1.1 to 1 and 1.15 for moderate nonattainment for ozone. That means if 100 tpy of VOCs are emitted from a proposed new or modified major facility in the marginal nonattainment county of Chautauqua in Jamestown, NY, the facility must obtain 110 tpy of ERCs to offset the increase in VOC emissions.

On the other hand, for 100 tpy of VOC emitted from a proposed new or modified major facility in the moderate nonattainment areas identified above, the facility must obtain 115 tpy of ERCs to offset the increase in VOC emissions. Offsets for 100 tpy of PM10 emissions of a facility located in New York County would also need 115 tpy of PM10 since the area is designated as moderate nonattainment for PM10.

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