Utah currently has three PM2.5 nonattainment areas with separate State Implementation Plans (SIPs). Each SIP is being developed and/or revised based on its attainment classification and area status. A summary of the status of each PM2.5 nonattainment SIP can be found in the following table.

AreaSIP or Section of SIPStatus
Salt Lake PM2.5 Serious NA SIPPart H Control Requirements (Major and Area Source Conditions)In public comment July 1 - August 15, 2018
Attainement Demonstration and Remainder of SIP RequirementsProjected for September 2018
Provo PM2.5 Serious NA SIPClean Data Determination (Reduced SIP Requirements)In public comment from May 16 - June 16, 2018
Logan PM2.5 Moderate NA SIPClean Data Determination (Reduced SIP Requirements)In public comment from July 18 - August 17, 2018

The Utah Division of Air Quality (UDAQ) is in the process of developing the Serious PM2.5 Nonattainment SIP for the Salt Lake and Provo Nonattainment Areas. The Salt Lake and Provo PM2.5 Serious Nonattainment SIP Major and/or Area Source Conditions recently went through public comment. UDAQ is anticipated to present its response to comments and revised Part H SIP Major and Area Source Conditions in the upcoming Utah Air Quality Board (AQB) meetings. Additionally, based on UDAQ's anticipated SIP development schedule, the remainder of the Salt Lake Serious Nonattainment SIP sections (e.g., attainment demonstration and modeling requirements; quantitative milestone requirements; etc.) will also be presented to the Utah AQB in upcoming meetings over the next two months.

The next AQB meeting is scheduled for September 5, 2018. Depending on the status of the remaining SIP sections and the AQB review, the remainder of Salt Lake PM2.5 Serious Nonattainment SIP sections will be presented for public comment in the following months.

The Clean Data Determination for the Logan PM2.5 Nonattainment area allows UDAQ to transition from a SIP to a maintenance plan and eventual re-designation of the area as attainment.

If you have any further questions about how the SIP will impact your facility compliance and/or future air quality permitting, please contact Trinity's Salt Lake City Office here.