Wind River Environmental Group LLC

Tag Archives: General Conformity

Transmission Line Environmental Impact Statements

Transmission Line Environmental Impact Statements

Transmission Line Environmental Impact StatementsWREG prepared the air quality analyses and sections for two Environmental Impact Statements (EISs) for proposed transmission lines in Utah. The first EIS was for the Mona to Oquirrh Transmission Corridor Project. Rocky Mountain Power, a division of PacifiCorp, applied to the Bureau of Land Management (BLM) for a right-of-way grant to use public lands for portions of the Project. The BLM was the lead federal agency for National Environmental Policy Act (NEPA) review and preparation of the EIS. WREG prepared emission estimates and impact analyses for transmission line construction activities, including mobile source emissions, heavy equipment emissions, paved and unpaved road dust, fugitive dust from earthmoving activities, and construction and operation of a concrete batch plant. Emissions and impacts were also evaluated from construction or expansion of substations. Because the project traversed portions of several nonattainment areas, a detailed general conformity analysis was also conducted.

WREG also prepared air quality analyses and document sections for Rocky Mountain Power’s proposed Sigurd to Red Butte No. 2 345kV Transmission Project EIS and for the initial geotechnical investigation. In addition to the emission source types evaluated for the Mona-Oquirrh project, WREG determined emissions from helicopters proposed for use in both the geotechnical work and during transmission line construction. A total of 12 alternate routes were evaluated, as well as expansion of two existing substations and construction/operation of a concrete batch plant.

Rocky Flats Environmental Technology Site Support

Rocky Flats Environmental Technology Site Support

Rocky Flats Environmental Technology Site SupportWREG personnel provided Kaiser-Hill Company and the US Department of Energy (DOE) air compliance, monitoring, and research support for the Rocky Flats Environmental Technology Site (RFETS) from 1996-2006. One of WREG’s Principals managed the air quality management organization at RFETS from 1996 to 2000 and continued to support Kaiser-Hill and DOE as the air quality Subject Matter Expert for the site, pending completion of regulatory closure requirements, including Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) requirements.

RFETS was a nuclear weapons production facility established in the early 1950s. The site was decommissioned and cleaned up, with physical completion declared in October 2005. Air compliance issues were challenging, given that the facility and its operations were constantly changing. Support activities included project-by-project regulatory review, emission estimation, compliance auditing, and permit application preparation and negotiation. The site was also subject to the radionuclide National Emission Standards for Hazardous Air Pollutants (NESHAP). Dispersion modeling analyses performed by WREG personnel aided in planning appropriate control measures for remediation and decommissioning projects.

Air monitoring included the acquisition of meteorological data from an on-site tower, continuous ambient monitoring at nearly 40 locations for radioparticulates, and effluent (in-stack) monitoring for particulate and gaseous radionuclides. Monitoring results were analyzed and reported to both regulatory agencies and the general public.

WREG team members also worked with RFETS personnel to research the movement of radionuclide contamination through the air pathway during a five-year actinide migration study. WREG personnel have co-authored several papers based on this research.