This document consists of the attainment demonstration, maintenance plan, and redesignation to attainment request for the Morenci Sulfur Dioxide (SO2) Nonattainment Area. The purpose of this document is to demonstrate how the area has met the National Ambient Air Quality Standards for SO2 and intends to maintain compliance with the NAAQS. Air quality standards are divided into two types: primary standards based on health effects and secondary standards based on environmental effects such as damage to property, plants, visibility, etc. Both standards are established by Environmental Protection Agency for criteria air pollutants such as sulfur dioxide.

The Clean Air Act states that an area can be redesignated to attainment if specific conditions are met, such as attainment of federal air quality standards; approval of a state implementation plan and a maintenance plan; and permanent and enforceable improvements in air quality. This document demonstrates that all CAA requirements for attainment have been met, summarizes the progress of the area in attaining the PM10 standards, demonstrates that the Payson area qualifies for EPA’s Clean Data Policy and Limited Maintenance Plan option, and includes a maintenance plan to assure continued attainment for ten years after the redesignation. This document is a formal request to the U.S. Environmental Protection Agency to redesignate the Payson, Arizona PM10 nonattainment area to attainment of the health-based 24-hour average and annual average PM10 National Ambient Air Quality Standards.

Analyses included in this document show that ambient air quality measurements have remained below the NAAQS for PM10, and both the 24-hour average design value and annual average PM10 design value are below EPA allowable limits. This document also demonstrates that the emission reduction control measures responsible for the air quality improvement are both permanent and enforceable.

The Arizona State Implementation Plan describes the programs that the State will rely upon to make reasonable progress toward “preventing any future and … remedying any existing impairment of visibility” in the large parks and wilderness areas in Arizona and those in other states that may be affected by pollution generated in Arizona (Class I areas). The federal regional haze rules require states to develop and submit SIPs for improving visibility through the year 2018 that make reasonable progress toward achieving “natural visibility conditions” by the year 2064. This plan is designed to adopt the basic visibility program that addresses impairment of visibility that can be traced to older major industrial sources and implements recommendations adopted by the Grand Canyon Visibility Transport Commission in its 1996 report to EPA.

This Plan defines visionary, yet pragmatic, investment choices Arizona will make over the next 25 years to maintain and improve its multimodal transportation system. The Plan is not rigid or fixed. It is part of a continuous process of planning, implementation, operation, and preservation and will evolve over time to reflect and be responsive to future changes in needs, resources, and priorities. This Plan is strategic in nature, examining investment types for ADOT’s capital program; it does not examine nor recommend any specific projects.

Weather conditions in Arizona can find you driving in sunny, moderate climates of the low desert to ice and snow of the mountain regions in a couple of hours. The Arizona Department of Transportation wants to make sure that your travel throughout the state is safe and enjoyable, no matter what the climate. We offer the enclosed winter driving information to ensure that you save the slipping and sliding for the slopes and not the roadways.

This document consists of the attainment demonstration, maintenance plan, and redesignation to attainment request for the Ajo Sulfur Dioxide (SO2) nonattainment area. The purpose of this document is to demonstrate how the area has met the National Ambient Air Quality Standards for SO2 and intends to maintain compliance with the NAAQS. Air quality standards are divided into two types: primary standards based on health effects and secondary standards based on environmental effects such as damage to property, plants, visibility, etc. Both standards are established by Environmental Protection Agency for criteria air pollutants such as sulfur dioxide.

The Office Air Quality, acting for the Director of the Department of Environmental Quality, is responsible for determining each regulated air pollution source’s capability and continuing ability to comply with air pollution source's emission rules; and any terms of conditional permits issued by the Arizona Air Pollution Control Hearing Board. This applies to all sources under the jurisdiction of the Department in matters of air pollution control. Performance tests, and/or visible emissions observations by agency personnel, are required to assure that sources are compliant with all applicable emission limitations at all major emission points before air pollution source operating permit are issued or renewed.

Seeking to identify how Arizona Department of Transportation could accomplish the greatest service improvements with the most efficient use of funds, ADOT engaged ARCADIS to perform a Crash Data Collection and Analysis study and examine the possibilities offered by technological innovations such as Electronic Data Entry, Relational Database Management Systems, and Geographic Information Systems. The study resulted in a comprehensive report with three components: an examination of best practices in use in the United States today, a use case and gap analysis examining ADOT's current data work, and a technical memorandum outlining how changes could be implemented.

This report examined the effects of freeway development on land use and property values. A case study was prepared for the Superstition Freeway (US60) corridor in Mesa and Gilbert, Arizona. Among the findings were the following observations:
* New freeways provide substantial benefits to users in the form of travel time savings and reductions in costs associated with operating motor vehicles.
* Access benefits are transferred from highway users to non-users through changes in property values.
Freeway construction may have an adverse impact on some properties, but in the aggregate, property
values tend to increase with freeway development.
* Not all properties values are affected by freeways in the same way. Proximity to the freeway was observed to have a negative effect on the value of detached single-family homes in the US60 corridor, but to have a positive effect on multifamily residential developments (e.g. condominiums) and most commercial properties.
* The most important factor in determining negative impact on property values appears to be the level of traffic on any major roads in the proximate area, which implies that regional traffic growth is more significant than the presence of a freeway per se.
* Given the beneficial effects of freeway development on the value of certain types of properties, local
governments may benefit from appropriate planning and zoning decisions in the vicinity of a freeway
corridor.

The Clean Air Act states that an area designated as nonattainment due to a violation of the NAAQS may be redesignated to attainment if the State submits and EPA approves a plan demonstrating that permanent emission controls that resulted in attainment will remain in place. This plan demonstrates that all CAA requirements for attainment and maintenance have been met and summarizes the progress of the area in attaining the PM10 standard. This document includes a formal request to EPA to redesignate the Rillito, Arizona PM10 nonattainment area to attainment for the health-based 24-hour average PM10 NAAQS.