Arizona Department of Environmental Quality

The Commission discussed several key items related to emergency response, including compliance with the America's Water Infrastructure Act, reporting requirements for highly hazardous flammable trains, and updates on the Hazardous Materials Emergency Preparedness grant program. Additionally, the Commission reviewed the status of the Emergency Response Fund and established procedures for the review and acceptance of Local Emergency Planning Committee emergency response plans, emphasizing the responsibilities of individual commissioners in verifying the completeness of these plans.

The meeting focused on the remedial investigation and feasibility study for the site. Key discussion topics included updates on the current extent of the plume, the status of private wellhead treatment systems, and plans for soil vapor extraction in the north area to mitigate vapor intrusion. The committee also evaluated various remedial alternatives, including enhanced reductive dechlorination and natural attenuation, while noting challenges regarding site access and future drilling for treatment wells.

The Commission held a meeting to address compliance matters regarding the Coconino County Local Emergency Planning Committee. Key discussions included the clarification of voting rosters and membership requirements per statutory guidelines. A motion was passed for the Commission to issue a formal clarification letter to Coconino County, requesting the resubmission of their current voting roster with a crossover reference to statutorily required groups, alongside documentation of recruitment efforts for vacant positions. Additionally, the Commission addressed the requirement for the county to resubmit their 2023 and 2024 Emergency Response Plans for review.

The commission discussed an I-10 hazardous materials incident involving a commercial vehicle collision and the subsequent transfer operations, emphasizing the need for improved coordination and notification processes between state and local emergency responders. Additionally, the commission received a presentation regarding America's Water Infrastructure Act, specifically focusing on its amendments to the Emergency Planning and Community Right-to-Know Act and the resulting implications for state emergency response commissions.

The meeting included a presentation on the Water Quality Assurance Revolving Fund program, including an overview of the remedial investigation, feasibility study, and record of decision processes. The discussion focused on the current status of groundwater monitoring, specifically contaminant concentrations of tetrachloroethylene, trichloroethylene, and 1,4-dioxane. Furthermore, the committee discussed the ongoing treatment system upgrade at the South Shannon drinking water well, which involves the implementation of an advanced oxidation system to improve hydraulic control of contaminant plumes and increase the well's pumping capacity. The board was unable to conduct official business due to a lack of a quorum.