October 29, 2013

MEMORANDUM

SUBJECT: Projected New Minor Sources in Indian Country 

FROM: Lillian Grace Bradley, Environmental Economist 

Air Economic Group, (C439-02) 

Health and Environmental Impacts Division 

TO: Christopher Stoneman, Policy Advisor 

 Outreach and Information Division, (C304-01) 

This memorandum presents projected new minor sources in Indian Country for the years 2011 through 

2016 for the following selected source categories: 

• Gas dispensing facilities 

• Auto body repair and miscellaneous surface coating operations 

• Petroleum dry cleaners 

• Stone quarrying, crushing and screening facilities 

• Hot mix asphalt plants 

The projection of future new minor sources and the methodology associated with the projections are 

documented in Chapter 2 of the “Economic Impact Analysis for the Review of New Sources and 

Modifications in Indian Country Final Report” and can be found at 

http://www.epa.gov/ttnecas1/eia.html. The underlying data presented in the report on which the 

projections were based remain the most current data and projections available. These projections include 

true minor sources only and do not include major sources or synthetic minor sources. 

In summary, based on the estimated number of existing minor sources in Indian Country in 2009, census 

population data, tribal emission inventory data, and Census Business Statistics along with EPA Regional 

input, the number of estimated new minor sources in the above source categories were projected for the

years 2011 through 2016. The EPA conducted the analysis for the projections at the EPA Region level 

and grouped the Regions based on similar source types. The EPA Region 3 contains no federally 

recognized Tribes, so it is omitted from the analysis. 

The EPA Regional groupings are as follows: Regions 1, 2, and 4; Regions 5, 7, and 10; and Regions 6, 

8, and 9. 

Because the original analysis was conducted for the continental United States only, excluding Hawaii 

and Alaska, the EPA Regions in the analysis include the following states: 

Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont 

Region 2: New Jersey and New York 

Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and 

Tennessee 
Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin 

Region 6: Arkansas, Louisiana, New Mexico, Oklahoma, and Texas 

Region 7: Iowa, Kansas, Missouri, and Nebraska 

Region 8: Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming 

Region 9: Arizona, California, and Nevada 

Region 10: Idaho, Oregon, and Washington 

Presented below are the estimated numbers of new minor sources in the identified source categories, 

based on the associated NAICS codes by EPA Regional groupings for the years of 2011 – 2016.

Table 1. Projected New Minor Sources in Indian Country, First 6 Years (2011-2016) 

 EPA Region Groups 

Industry Category NAICS 1,2,4 5,7,10 6,8,9 Total 

Auto Body Repair and Refinishing 

Shops 

811121

811211 4 7 79 90 

332812

Gasoline Dispensing Facilities 4471

3 15 77 95 

44711

447110

44719

447190

Petroleum-Based Dry Cleaners 8123

0 1 13 14 81232

812320

812310

Stone Quarrying, Crushing and 

Screening Facilities 

212311

212312

212313 0 0 7 7 

212319

212321

Hot Mix Asphalt Facilities 32412 0 0 5 5 

324121

Totals: 7 23 181 211 

The totals by Regional groupings represent the combined number of projected new minor sources for all 

the NAICS codes identified in that industry category. 

If you have any questions, please feel free to contact me at bradley.lillian@epa.gov or 919-541-5694.