Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Please see www.epa.gov/air/ozonepollution for the latest information on EPA's efforts to reduce ground level ozone pollution.

Dayton/Springfield, Ohio

September 30, 1997

DAYTON/SPRINGFIELD, OHIO

Effective Redesignation Date: 7/5/95 (60 FR 22289, 5/5/95)

Maintenance Plan - Key Features

1990 base year, emissions budget through 2005
Stage II
enhanced I/M in Green, Montgomery, and Clark Counties
regularly monitor ozone air quality using 5 existing ozone monitors and backup monitoring equipment
develop emission inventories every 3 years beginning in 1993; updates provided for intervening years
point source data will be updated annually with facility and permit data
area source inventory will be updated using new data and estimation procedures
mobile source inventory will be updated to include new VMT estimates and revised MOBILE emission models
OEPA will submit annual progress reports to EPA which summarizes available VOC emissions data

Contingency Plan Trigger

Contingency Measures

Schedule

- Upon violation or exceedance

identify and verify violation within 1 month
survey VOC sources and categories within 3 months
propose revised rules for the area within 6 months
adopt revised rules for the area within 9 months
source demonstration of compliance or submittal of schedule to achieve within 12 months
achieve compliance with revised requirements of OAC 3745-21 within 24 months

- Upon violation

identify and verify violation and issue Director's Orders within 1 month
adoption of NO_x RACT rules within 9 months
achieve compliance with requirements of OAC 2745-14-03 or request extension within 18 months

For further information:

William Jones
Air Programs Branch (AR-18J)
U.S. EPA, Region V
77 West Jackson Boulevard
Chicago, Illinois 60604

Telephone: (312) 886-6058; Email: jones.william@epamail.epa.gov