TABLE 1

SIGNIFICANT AIR QUALITY IMPACT

  

Pollutant

Averaging Time

Air Quality Area Designation

  

Class I

Class II

Class III

SO2 (µg/m3)

Annual

0.10

1.0

1.6

 

24-hour

0.20

5.0

7.3

 

3-hour

1.0

25.0

28

PM10 (µg/m3)

Annual

0.20

0.2

0.2

 

24-hour

0.30

1.0

1.0

PM2.5 (µg/m3)

Annual

0.06

0.2

0.2

 

24-hour

0.07

1.0

1.0

NO2 (µg/m3)

Annual

0.10

1.0

1.0

CO (mg/m3)

8 hour

---

0.5

0.5

 

1-hour

---

2.0

2.0

 

 

 		    

 

Table 2

SIGNIFICANT EMISSION RATES

Pollutant

Emission Rate

Greenhouse Gases (CO2e)

75,000 tons/year

Carbon Monoxide

100 tons/year

Nitrogen Oxides (NOX)

40 tons/year

Particulate Matter

25 tons/year

PM10

15 tons/year

Direct PM2.5

10 tons/year

PM2.5 precursors (SO2 or NOx)

40 tons/year

Sulfur Dioxide (SO2)

40 tons/year

Volatile Organic Compounds (VOC)

40 tons/year

Ozone precursors (VOC or NOx)

40 tons/year

Lead

0.6 ton/year

Fluorides

3 tons/year

Sulfuric Acid Mist

7 tons/year

Hydrogen Sulfide

10 tons/year

Total Reduced Sulfur (including hydrogen sulfide)

10 tons/year

Reduced sulfur compounds (including hydrogen sulfide)

10 tons/year

Municipal waste combustor organics (measured as total tetra- through octa- chlorinated dibenzo-p-dioxins and dibenzofurans)

0.0000035 ton/year

Municipal waste combustor metals (measured as particulate matter)

15 tons/year

Municipal waste combustor acid gases (measured as sulfur dioxide and hydrogen chloride)

40 tons/year

Municipal solid waste landfill emissions (measured as nonmethane organic compounds)

50 tons/year

 

 

Table 3

SIGNIFICANT EMISSION RATES FOR THE MEDFORD-ASHLAND AIR QUALITY MAINTENANCE AREA

Air Contaminant

Emission Rate

 

Annual

Day

PM10/PM2.5

(5 tons)

(50 lbs.)

 

 

 

TABLE 4

De Minimis Emission Levels

Pollutant

De minimis (tons/year, except as noted)

Greenhouse Gases (CO2e)

1,000

CO

1

NOx

1

SO2

1

VOC

1

PM

1

PM10 (except Medford AQMA)

1

PM10/PM2.5 (Medford AQMA)

0.5 [5.0 lbs/day]

Direct PM2.5

1

Lead

0.1

Fluorides

0.3

Sulfuric Acid Mist

0.7

Hydrogen Sulfide

1

Total Reduced Sulfur (including hydrogen sulfide)

1

Reduced Sulfur

1

Municipal waste combustor organics (Dioxin and furans)

0.0000005

Municipal waste combustor metals

1

Municipal waste combustor acid gases

1

Municipal solid waste landfill gases

1

Single HAP

1

Combined HAP (aggregate)

1

 

 

TABLE 5

Generic PSELs

Pollutant

Generic PSEL (tons/year, except as noted)

GreenhouseGases (CO2e)

74,000

CO

99

NOx

39

SO2

39

VOC

39

PM

24

PM10 (except Medford AQMA)

14

PM10/PM2.5 (Medford AQMA)

4.5 [49 lbs/day]

Direct PM2.5

9

Lead

0.5

Fluorides

2

Sulfuric Acid Mist

6

Hydrogen Sulfide

9

Total Reduced Sulfur (including hydrogen sulfide)

9

Reduced Sulfur

9

Municipal waste combustor organics (Dioxin and furans)

0.0000030

Municipal waste combustor metals

14

Municipal waste combustor acid gases

39

Municipal solid waste landfill gases

49

Single HAP

9

Combined HAPs (aggregate)

24