Projects
TRC helped characterize and remove accumulated sediments in a sensitive watershed
Challenges
TRC assisted a client with characterization and removal of accumulated sediments in a Water Quality Pond in the Edwards Aquifer Recharge Zone and the sensitive Barton Creek Watershed. The pond served a major highway intersection and had to remain in service while TRC performed the work. Therefore, samples had to be collected through standing water, making collection of representative samples difficult. Standing water, access restrictions and continued operation of the pond during removal required careful planning and close attention to weather events.
Solutions
TRC was able to safely collect representative samples through shallow standing water. Where deeper water was encountered, a dredge sampler was used to collect sediment samples. Construction proceeded only after TRC biologists determined that there were no sensitive species or habitats in the pond or nearby. With the representative sample information and knowledge of the sediment source, TRC was able to negotiate more reasonable disposal rates that allowed the project to proceed. TRC developed a staged construction approach that allowed operation of the pond to continue while sediments were removed. Standing water was pumped from the pond through filter bags to avoid negatively impacting the receiving stream or the karstic Edwards Aquifer Recharge features located there. Finally, loading and transportation operations were adjusted to minimize disruptions to local businesses.
Results
The water quality pond is critical to maintaining sensitive environmental features of the Edwards Aquifer Recharge Zone and to the Barton Creek watershed. TRC was able to facilitate timely and cost-effective rehabilitation of the pond without taking it out of service. The rehabilitation project restored the effectiveness and functionality of the pond in removing sediment and debris from stormwater prior to discharge thus protecting critical features and habitats.
Sharing Our Perspectives
Our practitioners share their insights and perspectives on the trends and challenges shaping the market.
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EPA Issues Clarification of Free Product Removal Requirements
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EPA recently clarified requirements for LNAPL recovery and remediation.
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Odor Evaluation Services
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TRC is nationally recognized as an expert in the field of odor measurement, identification, modeling and control engineering. This presentation includes an overview of odor properties, odor evaluation, modeling and odor thresholds and outlines the four sensory properties: detectability, intensity, character and hedonic tone.
Metals 101
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Metals are naturally occurring elements in the Earth’s crust that enter the environment through natural processes. They can be found in groundwater, soil and sediment. The trophic transfer of these elements in aquatic and terrestrial food chains has important implications for wildlife and human health.
Implementing bioremediation at environmental cleanup sites: TRC experts weigh in at leading industry conference
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TRC experts make several presentations at the Battelle conference about innovative approaches they have developed for implementing and monitoring bioremediation and the use of naturally-occurring or deliberately-introduced micro-organisms to break down environmental pollutants.
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This Regulatory Update is the first in a series summarizing the Rule and how it may affect your facility.
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Changes to EPA’s Risk Management Program (RMP) Regulations Are Coming
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Changes to the Risk Management Program (RMP) regulations were signed into a final rule on February 27, 2024, by EPA Administrator Michael S. Regan.
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The Executive Office of the President of the United States announced a National Emerging Contaminant Research Initiative
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OSHA’s Call for Comments on Mechanical Power Press Standard Changes
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Managing EHS & ESG Risks Through Integrated Systems Today and Beyond
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2020 TSCA Chemical Data Reporting (CDR)
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Earlier this year, EPA revised the CDR rule to reflect the 2016 amendments to TSCA, including changes for foreign-owned businesses and the reporting responsibilities of suppliers and contractors, as well as an exemption for small businesses.
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The facts on evaluating exposure to wildlife
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Innovative Remedial Concepts to Address Microplastics
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U.S. EPA and Army Corps of Engineers to Develop Revised Rule to Define “Waters of the United States”
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The US EPA and Army Corps of Engineering are redefining “Waters of the United States”.
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TRC Assists in Securing $11M in funding for small Communities
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The United States Environmental Protection Agency (U.S. EPA) and United States Department of the Army Corps of Engineers (U.S. ACOE) are redefining “waters of the United States (WOTUS).” A new Rule is expected to be finalized by September 1, 2023, and will address the May 25, 2023, U.S. Supreme Court decision in Sackett v. Environmental Protection Agency. In the interim, the U.S. EPA and U.S. ACOE will interpret the phrase “waters of the United States” consistent with the Supreme Court’s decision in Sackett.
Proposed MCLGs and MCLs for PFAS
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Final Regulatory Determination for Contaminants on the Fourth Drinking Water Contaminant Candidate List
EPA Announces $2 Billion in Funding to Address Emerging Contaminants in Drinking Water
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PFAS Discharges in NPDES Permits
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In a follow-up to the EPA Office of Water’s April 28, 2022 memo, EPA released “Part 2″, providing guidance for the NPDES permitting/pretreatment program as it relates to restricting discharges of PFAS to water bodies.
Washington State Establishes PFAS Cleanup Levels
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The Washington State Department of Ecology (Ecology) recently published a list of 6 PFAS compounds that now have soil and groundwater cleanup levels
EPA Issues Proposed Rule Designating PFOA and PFOS as Hazardous Substances
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The EPA has issued a pre-publication version of a proposed rule to designate two PFAS compounds as hazardous substances under CERCLA.
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EPA announced the addition of five new PFAS to the list of Regional Screening Levels (RSLs)
EPA Announces Updated Drinking Water Health Advisories for Four PFAS Chemicals: PFOS, PFOA, PFBS, & GenX
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On June 15, 2022, the EPA released updated Health Advisory Levels for four per- and polyfluoroalkyl substances (PFAS) in drinking water
Integrating Sustainability, Digital Connectivity and Design Optimization in Wastewater Treatment Systems
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Some organizations rarely think about water and wastewater treatment, until there is a problem. American industry depends on the ability to treat wastewater discharges while complying with regulatory standards and addressing emerging contaminants. If wastewater treatment fails, our environment is negatively impacted, and companies are exposed to shutdowns, delays and fines.
EPA Proposes Aquatic Life Criteria for PFOA and PFOS
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Fifth Unregulated Contaminant Monitoring Rule Lists 29 PFAS
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EPA published fifth Unregulated Contaminant Monitoring Rule as required every five years and 29 of the 30 contaminants listed are PFAS.
Waters of the United States (WOTUS) Revised Definition: Proposed Rule Published
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Rule Proposed to Revert Back to Pre-2015 Definition of Waters of the United States (WOTUS) published December 2021
Construction Delivery Method Comparison: Design-Build vs. Design-Bid-Build
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In the construction industry the successful execution of every project depends on the delivery method. Two of the most widely used project delivery methods are Design-Bid-Build and Design-Build.
Overhauling Oroville: The Amazing Push to Repair the Tallest Dam in the United States
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EPA Solicits Comments on PFAS Discharges in Five Point Source Categories
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TRC Companies Inc. Acquires 1Source Safety and Health
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TRC Companies (“TRC”), a leading technology-driven provider of end-to-end engineering, consulting and construction management solutions, has acquired 1Source Safety and Health, a firm that provides management consulting services in areas such as indoor air quality, asbestos management, industrial hygiene and safety management systems.
TRC Awarded a Yahara WINS Grant
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TRC was recently awarded a Yahara WINS grant to develop a pilot scale simple aeration method for removing phosphorous from the discharge of manure digesters. The grant application was developed and submitted by: Bob Stanforth, Alyssa Sellwood, Mike Ursin, Ted O’Connell, Ken Quinn, and John Rice, who are members of multiple TRC CORE teams.
Potential Impacts from EPA’s Proposed Waters of the United States Rule
July 24, 2019
The EPA is redefining which bodies of water are eligible for protection under the federal Clean Water Act – and which ones aren’t.
TRC Acquires California Construction Management Firm Vali Cooper & Associates
June 26, 2018
LOWELL, Mass. – TRC, a leading provider of end-to-end engineering, consulting and construction management solutions fueled by innovative technology, announced today it has acquired Vali Cooper & Associates Inc., a top California infrastructure firm that manages transportation, water/wastewater, utility and facilities projects.
TRC Recognized for Removing Lead Contamination from Mill River in Fairfield, Connecticut
March 7, 2018
LOWELL, Mass. – TRC, a leader in engineering, environmental consulting and construction-management services, has been awarded a pair of awards from the Environmental Business Journal – one for business achievement and the other for an innovative remediation project to remove lead sediment from the Mill River in Fairfield, Conn.
