Wastewater generated during semiconductor fabrication is often complex, with streams that present unique treatment and compliance challenges. Fab operations generate high-volume wastewaters full of complex constituents like heavy metals, nitrates, ammonium, and organic toxics. These compounds all contribute to elevated risk for industry and draw regulatory attention. While treatment performance and discharge requirements can be a major focus for many facilities, air emissions associated with wastewater treatment are quickly becoming an area of interest of the United States Environmental Protection Agency’s (U.S. EPA).
In modern fabs, wastewater intersects with multiple regulatory domains, including air emissions and hazardous waste management. Air emissions from wastewater systems must be quantified for permitting and reporting, and many process streams require hazardous waste determinations and adherence to related air standards.
Trinity Consultants empowers our clients across multiple industrial sectors with cutting-edge solutions for wastewater emission modeling and regulatory compliance to inspire clarity and confidence. Whether undergoing expansion or adding new process lines, seeking to stay ahead of investigations from the U.S. EPA, or seeking to optimize your facilities’ treatment systems, Trinity provides and delivers the expertise and technology to support your environmental and permitting goals. Trinity has at their disposal modeling tools to help facilities accurately quantify emissions for permitting, reporting, identifying high sources of emissions, and more.
Toxchem®
Trinity’s wastewater experts specifically utilize the wastewater modeling software, Toxchem®, to assist clients in the chemical and refinery sectors, as well as electronic manufacturing clients alongside Trinity’s Semiconductor sector, with modeling wastewater emissions from onsite wastewater plants or units. With years of experience between enforcement cases, general compliance projects, and regulatory applicability reviews, the wastewater experts at Trinity combine regulatory expertise with modeling tools like Toxchem® to deliver accurate and actionable insights that help clients stay in compliance and avoid costly penalties.
Toxchem® is a wastewater modeling program developed by Hydromantis as an alternative for the programs WATER 8 and WATER 9, which are now outdated as EPA support for WATER 8/9 has been discontinued. Toxchem® is an improved and updated program that includes mass transfer processes, sorption of contaminants to solids, and a compound database containing critically reviewed physical, chemical and biological properties.
Toxchem® models use client specific inputs to calculate wastewater treatment emissions. Wastewater treatment system layouts are customizable within Toxchem® and are built from your site’s unique process and wastewater process units. Along with Trinity’s experienced personnel in the chemical and semiconductor sectors, compounds outside of the standard Toxchem® database can be modeled for potential and actual air emissions. Using the following factors, Toxchem® allows for unique models customized for your facility’s wastewater constituents:
- Molecular weight;
- Henry’s Law Constants and temperature correction coefficients;
- Biodegradation rates (aerobic, anaerobic, anoxic); and,
- Solubility and Log Kow (octanol-water partition coefficient).
Toxchem® is a strong option for facilities that are updating historic engineering estimates or seeking greater insight into emissions from wastewater units and processes. What You Gain with Toxchem® + Trinity:
- Faster Compliance: Streamlined modeling helps meet EPA deadlines with confidence.
- Reduced Risk: Accurate emission estimates minimize regulatory exposure.
- Custom Solutions: Tailored layouts and inputs for your unique facility.
- Expert Support: Work directly with Trinity’s experienced wastewater experts.
- Training Available: Empower your team with hands-on Toxchem®
For facilities that are subject to wastewater and waste management requirements, for example, waste requirements under 40 CFR Part 264, Subparts AA/BB/CC (Resource Conservation and Recovery Act, Standards for Owners and Operators of Hazardous Waste Treatment, Storage, and Disposal Facilities). Trinity’s wastewater staff can use Toxchem®, along with a client’s counsel, to support regulatory compliance and emission estimation.
Whether for permit conditions, compliance requirements, or calculation needs, many facilities also require wastewater sampling to meet these demands. Thanks to decades of hands-on experience and vast subject-matter expertise in compliance and applicability from Trinity’s wastewater experts, your facility can feel supported by assistance that extends well beyond wastewater emissions calculations and modeling. Our team works as an extension of your environmental staff, helping ensure that sampling activities are efficient, technically sound, and aligned with regulatory requirements.
Trinity’s highly technical wastewater specialists can support your sampling needs, such as:
- Developing wastewater or waste sampling plans
- Conducting sampling under regulations such as RCRA BB/CC
- Training and supervising onsite staff
Fab Challenges Trinity Can Help You Solve
- Modernizing legacy WATER 8/9 estimates for permitting and inventories;
- Managing variable wastewater campaigns that influence emission factors and regulatory applicability;
- Addressing metals and fluoride control strategies that affect sludge, cost, and system stability; and,
- Meeting PFAS expectations for monitoring, pretreatment, and data defensibility.
Whether planning a new fab, adding tools, renewing permits, or updating legacy wastewater emission estimates, Trinity can provide the technical and regulatory support you need.
Trinity Consultants Chemical Sector Services (CSS) group assist industrial facilities nationwide for Toxchem modeling needs, allowing for development of beneficial strategies to meet the demands of their clients’ specific projects. Trinity can also provide client specific training for Toxchem®, tailored to a facility, industry, or process. Please reach out to Amanda Antico in Trinity’s Chemical Sector for more information on how Toxchem® can be beneficial for emission calculations and how Trinity can help.
