July 2021

EPA Identifies Rulemaking Priorities for 2021 and Beyond

On June 11, 2021, the EPA released its planned regulatory actions through what is known as the Unified Regulatory Agenda. This is the first real glimpse into the future regulatory agenda and priorities of the EPA under the Biden Administration. To see what type of regulatory changes you can expect in 2021 and beyond, read more…

The Latest on the PFAS Front

The past few months have seen a slew of federal and state actions associated with per-and polyfluoroalkyl substances (PFAS). For a summary of some of them, read more…

Passive Diffusion Groundwater Sampling for Compounds Beyond VOCs

Passive diffusion bag (PDB) sampling has been shown to be a cost-effective alternative to standard (or low-flow) purge and sample techniques for sampling volatile organic compounds (VOCs) in groundwater from monitor wells. Until recently, the use of PBD sampling was limited to non-polar VOCs because large or polar molecules and ions cannot pass through the polyethylene membrane into the sampling bag. With relatively recent advances, this is changing, and passive diffusion sampling can now be used for an expanded list of compounds including major cations and anions, trace metals, VOCs, 1,4-dioxane, and PFAS. See for example the EON Products, Inc. Dual Membrane sampler®. Multiple publications are available that summarize the many available options and pros and cons of passive sampling, including those from the U.S. Geological Survey and ITRC. For help in determining if PDB sampling makes sense for you monitoring needs, please contact Colton_Creal@Cox-Colvin.com

EPA Issues Final Denial of Petition to Revise the RCRA Corrosivity Hazardous Characteristic

After nearly 10 years, EPA recently published final denial of a 2011 petition to tighten the hazardous waste rules for identifying characteristically corrosive waste. The petition requested that EPA revise the regulatory value for defining waste as corrosive from the current value of pH 12.5 to pH 11.5 and to expand the scope of the RCRA corrosivity definition to include nonaqueous waste in addition to the aqueous waste currently regulated. The changes would have significantly broadened the scope and volume of materials meeting the corrosive criteria. What might this final denial tell us about the likelihood of EPA designating per- and polyfluoroalkyl substances (PFAS) as hazardous waste under RCRA? Read more…

Cox-Colvin & Associates, Inc.

Project Spotlight

Coming Soon

  • ITRC cycnobacteria guide
  • Household hazardous waste
  • EPA Proposes New Reporting And Recordkeeping Rule For PFAS

Upcoming Events

July 12, 2021 – 3:30 PM : Missouri Waste Coalition Environmental Track – Craig A. Cox will be presenting “Evaluation and Remediation of a Large Comingled Dilute VOC Plume in Western Ohio – A Case Study”

July 12, 2021 – 4:00 PM : Missouri Waste Coalition Environmental Track Craig A. Cox will be presenting Successful Closure of a DNAPL Site – Lessons Learned”

July 12, 2021 – 4:30 PM : Missouri Waste Coalition Environmental Track Laurie A. Chilcote and Craig A. Cox will be presenting Innovative and Proven Method to Accurately Access Location and VI Potential to Better Define your CSM Model.