Particulate matter less than 2.5 microns in size – known as PM2.5 or “fine particulate matter” – is classified as one of the six criteria pollutants that is federally regulated under the Clean Air Act’s (CAA) National Ambient Air Quality...

On April 30, 2021, EPA Acting Assistant Administrator for Enforcement and Compliance Assistance, Lawrence E. Starfield, a longtime US Environmental Protection Agency (EPA or Agency) attorney and senior manager, released a memorandum to EPA’s Office of Enforcement and Compliance Assurance...

Shaden Musleh, PE, Principal Water Resources Engineer at INTERA, recently authored an article entitled, Colorado Groundwater Quality and Emerging Contaminants, which was featured in Water Education Colorado (WECO). INTRODUCTION Groundwater is an important resource that Coloradans have relied on for...

Patrick Williamson, PG, a Principal Hydrogeologist at INTERA, recently co-authored a paper with Hernan Beltran, Chris Lane, and Jim Willis, entitled Baseline Investigations and Preliminary Design for an In-Pit Tailings Storage Facility, El Gallo Mine, Sinalo, to be presented at...

Property damage in the US from the 2017 Hurricane Season has been estimated at more than $200 billion. To support clients in determining the cause of hurricane damage, INTERA developed a web-based GIS application called “Hindcast 20/20” that provides a...

Coupling GoldSim and PhreeqC GoldSim is a software platform for visualizing and simulating dynamically complex flow systems in engineering, science and business. In the environmental and mining arena, GoldSim is typically used to understand (or design) complex fluid or material...