January 30, 2023

SCS Engineers
What’s in my fertilizer?


From the USEPA to headlines in the media, coverage of PFAS moving from wastewater to drinking water is a major concern. Furthermore, there are growing concerns about how much PFAS is in by-products that are recycled or reused from waste products. Topping that list is fertilizer.

Retail fertilizer products made from at least 50% biosolids commonly sold to the general public and used in farming contain PFAS, which could get into crops and stock, eating those crops. The Environmental Protection departments in some states are beginning to consider or pass state-level specific regulations on the content of PFAS in biosolids.

The December 2022 USEPA memo to states (pages 4-5) made these recommendations on biosolids as follows:

  1. Recommended Biosolids Assessment 1. Where appropriate, states may work with their POTWs to reduce the amount of PFAS chemicals in biosolids, in addition to the NPDES recommendations in Section B above, following these general steps:7 a. EPA recommends using draft method 1633 to analyze biosolids at POTWs for the presence of 40 PFAS chemicals.8 b. Where monitoring and IU inventory per section B.2 and B.3.a above indicate the presence of PFAS in biosolids from industrial sources, EPA recommends actions in B.3.b to reduce PFAS discharges from IUs. c. EPA recommends validating PFAS reductions with regular monitoring of biosolids. States may also use their available authorities to conduct quarterly monitoring of the POTWs (see 40 CFR 403.10(f)(2)).


Tony Kollasch, an environmental consultant specializing in remediation, tells us to use precaution and learn more about what plans are underway in your state. In his Wisconsin Agri-Business article, BIOSOLIDS and PFAS – NUTRIENTS with a SIDE OF CONCERN, he walks readers through the most recent reports and studies using plain language.

The issues and questions that come up are solvable. There are treatments for removing PFAS, and as an environmental engineering and consulting firm, we solve these types of challenges. We encourage the safe use of by-products and urge you to learn more about specific products by joining associations where you can educate yourself – it’s good for business and for understanding pending regulations that may impact your operations. It will help you run your business sustainably by making sound decisions based on human health, the environment, and economic demand.


Additional Resources:





Posted by Diane Samuels at 6:00 am

December 15, 2022

Meet SCS Engineers professionals at the A&WMA/ASME Waste Information Exchange, April 11-12, 2023, at the Doubletree Hilton Washington DC-Crystal City Hotel, in Arlington, Virginia.

This conference will cover the latest on a broad range of waste-related topics including regulations and research in an interactive, discussion-focused format. This is an excellent learning and networking opportunity to hear directly from experts at EPA, NGOs, industry, and academia who are working together to develop solutions to creating a cleaner and healthier environment.  The technical program will cover policy updates and regulatory changes, as well as current and late-breaking research on hot topics such as:

• Solid Waste
• Biosolids
• Landfill Issues and Greenhouse Gas Emissions Monitoring
• Reuse/Recycling
• Resource Management
• Waste-to-Energy
• PFAS Emissions and Controls
• Environmental Justice
• RCRA Requirements for Open Burning

Managers, practitioners, policymakers, and researchers involved in waste management, public works, operations, maintenance, manufacturing, transportation, technology, compliance, collections, and other environmental roles will benefit from the technical content and networking available at this conference.

Sponsorship and display opportunities are available at this conference! Discover how your company can maximize exposure, generate leads, and support the industry.

Visit for registration information and evolving conference details.



Posted by Laura Dorn at 6:09 pm