Wind River Environmental Group LLC

Tag Archives: Dispersion Modeling/Planning

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.

Refinery Modeling Analysis and Compliance Support

Refinery Modeling Analysis and Compliance Support

Refinery Modeling Analysis and Compliance SupportWREG reviewed and updated modeling analyses for a regional petroleum refinery as part of an effort to finalize construction permits for refinery modifications. Since the initial modeling was performed, the refinery had discovered a number of inconsistencies in permit information and also needed to revise certain permit limits. WREG obtained the earlier modeling files, reviewed them against current refinery information, and, where necessary, calculated revised emissions. Refinery emissions were modeled and compared to state and federal limits, then documented in a report to be submitted with revised permit applications. Additional work for this refinery has included a review of stack test data and comparison with US Environmental Protection Agency (EPA) standard methods for measuring particulate matter and fine particulate matter (PM10), as well as a siting study for PM10 monitors.

Integrated Gasification Combined Cycle Power Plant Studies

Integrated Gasification Combined Cycle Power Plant Studies

Integrated Gasification Combined Cycle Power Plant StudiesWREG researched the status of integrated gasification combined cycle (IGCC) technology for a client in the Rocky Mountain region. We evaluated gasification technologies, gas composition, emissions, emission controls and control opportunities (mercury and carbon dioxide [CO2]), air permits issued to IGCC projects, other environmental considerations, capital costs, operating and maintenance costs, status of US Department of Energy (DOE) research, and availability of DOE funding. The client will use the information developed in evaluating future resource options. WREG also prepared feasibility studies, including emission calculation, extensive dispersion modeling, and Best Available Control Technology (BACT) research, for an IGCC plant considered for a site in southeastern Arizona.

Dispersion Modeling for Natural Gas Project in Israel

Dispersion Modeling for Natural Gas Project in Israel

Dispersion Modeling for Natural Gas Project in IsraelWREG prepared dispersion modeling analyses using AERMOD for a proposed onshore natural gas processing facility in Israel for a global oil and gas company. Two locations and several equipment configurations were modeled. Sources evaluated included compressors, emergency equipment such as fire water pumps and emergency generators, and hot oil heaters. The modeling results were compared to the Israel Abatement of Nuisance Regulations.

Coal Unit Feasibility Study

Coal Unit Feasibility Study

Coal Unit Feasibility StudyWREG worked with a Colorado utility to investigate the feasibility and constraints on building a second coal unit at an existing power station in northern Colorado. The study looked at Class I issues at Rocky Mountain National Park and the Rawah Wilderness Area, as well as local impacts around the power station. Modeling was performed with AERMOD and CALPUFF. Emission development and modeling involved not only coal stack emissions, but also coal, ash, and lime handling, and emissions from existing or proposed gas turbine peaking units at the site.

British Nuclear Group

British Nuclear Group

British Nuclear GroupWREG performed work for British Nuclear Group (BNG), the management, operations, and cleanup contractor for Sellafield, a large nuclear power and fuel reprocessing facility located in Cumbria, in northwest England. WREG provided independent dispersion modeling and air quality impact estimation review for explosive demolition of concrete cooling towers at Sellafield. The cooling towers were part of Calder Hall, the world’s first commercial nuclear power station, opened in 1956.

WREG personnel interviewed the firm that had performed the air quality impact assessment, critiqued the dispersion modeling analysis, and met with BNG personnel responsible for demolition project management and preparation of the “Safety Case.” One of WREG’s Principals signed the final Safety Case documents as a Verifier.