Environmental Science Associates

Eastern Research Group Inc. (ERG) is a premier consulting firm based in Sacramento, California, specializing in environmental and public health challenges. With over 40 years of experience, ERG employs a cross-disciplinary approach, integrating expertise from environmental scientists, engineers, and data specialists to deliver tailored solutions for clients at various government levels. ERG is recognized as a national leader in addressing complex issues such as PFAS contamination, air quality, and sustainable facility planning. By collaborating with federal and state agencies, as well as international organizations, ERG is committed to enhancing public health, environmental safety, and regulatory compliance across the United States. Generated from the website

Environmental Science Associates (ESA) is a Sacramento-based environmental consulting firm with 100 employee-owners dedicated to delivering impactful work. Specializing in environmental assessments and consulting services, ESA focuses on projects that make a difference. With a commitment to excellence and sustainability, ESA provides expert solutions to environmental challenges, ensuring that every project is approached with care and expertise. As a employee-owned company, ESA's team is invested in the success and impact of their work, making them a trusted partner in environmental consulting. Generated from their website's infomation

Founded in 1996, Tetra Tech is one of the leading companies in the United States that provides consulting, engineering and technical services related to waterways, harbors and coastal areas. It assists commercial and government clients in the areas of resource management and infrastructure. The company additionally offers environmental, water and wastewater management, security design and infrastructure services. Tetra Tech works with individuals who specialize in science, research, engineering, construction and information technology. Its services include research and development, applied science and technology, program and construction management, operations and maintenance. The company employs more than 8,500 individuals and operates more than 280 offices worldwide. Headquartered in Pasadena, Calif., Tetra Tech maintains one of its offices in Rancho Cordova, Calif.