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Maine Air Toxics Initiative
Various federal programs have significantly reduced the exposure of Maine people to air toxics. However, two National Air Toxics Assessments (NATA), conducted by the U.S. Environmental Protection Agency (EPA) using 1996 and 1999 emissions data, suggested that Maine citizens face unacceptable exposure to air toxics. In response to this potential risk, the Maine Department of Environmental Protection undertook the Maine Air Toxics Initiative (MATI). MATI is a facilitated stakeholder process aimed at verifying whether or not the NATA results seem reasonable, and if so, identification of which air toxics are the most responsible for creating health risks, the source of those pollutants, and creation of cost effective solutions to reduce the risk. This holistic assessment of air toxics risks will enable Maine to target available resources for maximum risk reduction. The ultimate goal of this project is to reduce exposure of all Maine citizens to acceptable levels of air toxics. In 2003, Maine DEP convened the Air Toxics Advisory Committee (ATAC). The ATAC is composed of community organizations, government organizations (local, state and federal), industrial organizations and environmental organizations having an interest in air toxics. Jonathan Reitman served as an independent, outside facilitator for the project. EPA awarded Maine DEP with a Healthy Communities Grant to help fund the Maine Air Toxics Initiative. The ATAC met on several occasions from 2003 to 2005 to reach the first step in the Scope of Work for the Maine Air Toxics Initiative (MATI), which was to develop the following Air Toxics Priority List for Maine. Final Maine Air Toxics Priority List - July 2007
The priority list is based on the ATAC's evaluation of existing data from ambient air monitoring programs, emissions inventories, chemical toxicity databases, and national air modeling. A schematic of the process used to develop the list and summary description of the process can be found in the ATAC's Consensus Report. A detailed explanation is contained in documents located on the Background Documents page. On November 18, 2005, the ATAC concluded that significant quantities of a wide range of air toxics compounds are emitted by point, area and mobile sources in Maine. The ATAC also found that there remains a considerable degree of uncertainty in many source categories resulting from imprecise emission factors and/or limited data on the activity level of some source categories. Nevertheless, the ATAC found it appropriate to move to the next phase defined in the MATI Scope of Work, while continuously improving the emission estimates by updating data as new information becomes available. Phase II of the Maine Air Toxics Initiative For Phase II of the MATI, the ATAC appointed subcommittees to develop appropriate early actions and identify a long-term, targeted strategy with clear implementation goals and timeframes to reduce air toxics to acceptable levels. These strategies could include:
The goal was a consensus recommendation from each subcommittee, or failing that, options for the ATAC to consider. The three subcommittees formed by the ATAC were:
On June 26, 2007, the ATAC met and reached agreement on recommended strategies to reduce air toxic emissions in Maine. The report contains an Air Toxic Priority List, and notes that most air toxic emissions in Maine are combustion by-products. After evaluating pending regulations due to existing air programs, the ATAC recommended the following air toxic emission reduction strategies:
The Department applied the ATAC recommendations to develop the Maine Air Toxics Strategy. The strategy maps out concrete goals, steps, resource allocations and timelines to achieve air toxic reductions. The plan includes provisions for continued gathering, analysis and communication of air toxics data.
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