draft 3/11/97

SIP PROCESS--CURRENT VS. NEW

CURRENT

ACTIVITY TIME (months)

(many activities can be done concurrently with others) RESOURCES (per area, per pollutant	FTE $K Determine nonattainment areas based on aq data (CAA process in §107(d) 24 (from NAAQS) .3 5 Develop base year emission inventory 12 1 50 Select dispersion model--validate for base year emissions & aq data 6 .5 40 Project emission inventory to statutory attainment date (account for growth, pre-existing controls) 4-6 .5 30 Model projected air quality concentrations based on projected emissions inventory 3 .5 40 Test several control strategies (sets of control measures) for impact on future pollutant concentrations 3 .5 60 Select a control strategy that results in attainment of the NAAQS by the statutory attainment date 2 .3 Determine phasing of control (emission reductions) over time such that RFP is ensured 2 .3 Adopt emission controls in the form of regulations, infrastructure changes, etc. 6 1 Submit SIP to EPA (Under Title I, Part D, Subpart 2) for ozone, part of RFP plan was due prior to attainment demonstration plan 2 .2 EPA reviews SIP, approves or disapproves (prepares FIP if disapproval)

SIP PROCESS--CURRENT VS. NEW

NEW

ACTIVITY TIME (months)

(many activities can be done concurrently with others) RESOURCES (per pollutant, per area?) FTE	$K Set up RAMPs 6-9 Determine AOV's based on aq data 24

(from NAAQS) Determine preliminary AOI's (P-AOI's) 3

(from AOV ID) Develop base year emission inventory for all areas in P-AOI 12 Select regional dispersion and other appropriate (e.g., observation-based) models--validate for base year emissions & aq data 6-9 Project emission inventory to statutory attainment date for all areas in P-AOI 6-9 Model projected air quality concentrations based on projected emissions inventory 3-4 Test several regional control strategies (sets of control measures) for effect on future pollutant concentrations 4-6 Select a regional control strategy that results in attainment of the NAAQS by the statutory attainment date across the P-AOI--The area requiring the control becomes the final AOI (F-AOI) or "control region." The regional strategy becomes the "Regionally Integrated Plan" or RIP. 2-4 States in AOI submit the RIP to EPA 2 EPA uses the RIP to call upon States to revise their SIPs ("SIP calls") to adopt emission reduction measures that incorporate the RIP provisions. 2 State decides how to phase in control (emission reductions) over time such that RFP is ensured (including interim air quality improvements? [still under discussion in RFP Subgroup]) 2 State adopts emission controls in the form of regulations, infrastructure changes, etc. 6 State submits SIP to EPA 2 EPA reviews SIP, approves or disapproves (prepares FIP if disapproval)