| Advanced Materials Center, Inc.: Environmental services, and materials and products evaluation and testing. Based in Illinois. |
| Advanced Waste Management Systems, Inc.: Hazardous waste management, overseas environmental project management, and environmental site evaluations. Based in Tennessee. |
| American Management Resources Corp.: Offering environmental professional design services, and environmental audits. Located in Florida. |
| Ami Adini & Associates, Inc.: Los Angeles, California-based specialists in environmental consulting, site impact assessments, hazardous waste, and storage tank issues. |
| Atlantic Environmental Inc.: Environmental, industrial hygiene and safety consulting and testing, chemical exposure, and indoor air quality experts. Located in New Jersey. |
| Block Environmental Services: Environmental and laboratory services. Based in California. |
| Breedlove, Dennis & Associates: Diversified environmental consulting firm, with offices in Florida and Tennessee. |
| Cambridge Environmental, Inc.: Assessing and helping to minimize risks to health and the environment. Based in Massachusetts. |
| Campbell and Associates: Providing consulting services to industry and the legal community in geology, hydrogeology, water supplies, contaminant transport, and associated environmental disciplines. Based in Houston, Texas. |
| Chambers & Associates: Consulting Firm specializing in the conservation of marine fish and their essential habitats. Based in Kensington, Maryland. |
| Clement Mesavage, Jr.: Consultant for environmental, safety, and health litigation, based in Virginia. |
| Custom Environmental Services: Small, California-based consulting firm, assisting with environmental compliance, and providing expert testimony for Phase I Site Assessments. |
| Daniel B. Stephens & Associates, Inc.: Specialties include vadose zone and groundwater hydrology and remediation, water rights, water resources, civil and geotechnical engineering. Based in New Mexico |
| David E. Smink, P.E.: Addressing environmental issues in the oil, gas, and petroleum industries. Based in Colorado. |
| David F. Goldsmith: Consulting services and expert testimony for both federal and state cases for matters of epidemiology, environmental and occupational health. District of Columbia. |
| Eagle Industrial Hygiene Associates: Industrial hygiene services custom-tailored to client needs. Based in Pennsylvania. |
| Earthward Consulting: Consultations, computer simulations, and expert testimony regarding groundwater analysis, deep well injection, and SWIFT. |
| EBA Waste Technologies: California waste management consulting and engineering firm. |
| ENSR: Specializing in solving and preventing a broad range of environmental problems for industry. Located in Massachusetts. |
| Environmental & Turf Services, Inc.: Expertise in lead and arsenic contamination of shooting ranges. Based in Maryland. |
| Environmental Liability Management, Inc.: Risk management specializing in industrial and commercial properties. Based in New Jersey. |
| Environmental Litigation Associates: Seven senior environmental scientists and engineers serving the legal community on a broad range of environmental and scientific matters. |
| Environmental Systems & Technologies, Inc.: Environmental and computer technology experts, based in Virginia. |
| Epihealth Associates: Environmental health, public health and infectious disease epidemiological investigation and litigation support services. Based in Maryland. |
| ETS Inc.: Air quality consulting firm, specializing in air emissions control, measurement, training, design, troubleshooting, and regulatory services. Roanoke, Virginia. |
| First Environment, Inc.: New Jersey firm, providing services for environmental management, site investigation, and regulation. |
| Gershman, Brickner & Bratton, Inc.: Virginia firm, providing litigation support, dispute resolution, and other consulting services to the waste management industry. |
| Heritage Technical Services, Inc.: Providing environmental and engineering litigation support and consulting to clients throughout the Mid-Atlantic and Midwest regions. Based in Eastern Pennsylvania. |
| Hitchings Associates, P.C.: Industrial hygiene consulting firm specializing in laboratory planning, safety and design, industrial ventilation, and indoor air quality. Located in Indiana. |
| HSA Environmental: Offering environmental and geotechnical engineering, construction materials testing, industrial hygiene, and information management services. Offices in Florida and South Carolina. |
| HydroGeoLogic, Inc.: Services include soil and groundwater contaminant assessment and remediation, environmental compliance audits, risk assessment, and water supply investigations. Based in Virginia. |
| Integrated Environmental Management, Inc.: Consulting and services in the areas of radiation, radioactivity, nuclear science, safety and the environment. |
| Intertox, Inc.: Environmental and public health consulting firm, focusing on human health and ecological risk assessment. Seattle, Washington. |
| J. Mike DiGiglia, LLC: Toxic tort and environmental regulatory consultant, based in Woodland Park, Colorado. |
| James M. Seltzer, MD: Offering consultation and expert testimony in California for environmental medicine, indoor air quality, industrial hygiene, and related issues. |
| Johnson Environmental Concepts: Geochemical consulting firm offering expertise in the application of geochemistry, environmental chemistry, geology, and hydrology to environmental problems and resource development. Rapid City, South Dakota. |
| Lake Engineering, Inc.: Full service environmental engineering consultants, based in Georgia. |
| Leslie R. Dole, Ph.D., CM: Environmental remediation consultant, with experience in the areas of treatment and disposal of radioactive, chemical hazardous wastes. Specializing in solidification and stabilization technologies. |
| Mearns Consulting Corp.: Providing solutions for environmental problems ranging from investigations and assessments to remediation. Located in California. |
| Mercury Technology Services: Texas firm, specializing in environmental issues involving mercury. |
| MET Associates: Providing expert testimony and litigation support for forensic meteorology, air pollution modeling, air dispersion analysis, and toxic tort cases. Based in Texas. |
| Nutter, Overcash & Associates, Inc.: Services for waste water and sludge land treatment systems, wetland delineation and permitting, environmental, hydrogeologic, storm water, sediment, and soil investigations. Based in Georgia. |
| Okie Environmental & Consulting Services: Experts in environmental regulatory compliance and remediation of hazardous waste contaminated sites. Located in Oklahoma. |
| Pilko & Associates, Inc.: Providing management-oriented solutions to complex environmental, health and safety challenges. Offices in California and New Jersey. |
| Plateau Ecosystems Consulting, Inc.: Professional aquatic and terrestrial ecological consultants, offering assessment, compliance support, special studies, threatened and endangered species, laboratory services, and resource management. Based in Arvada, Colorado. |
| Professional Analytical and Consulting Services, Inc.: Providing services for major environmental cases involving water and air quality, drugs, and activated carbon. Based in Pennsylvania. |
| Quantitative Decisions: Providing advice and strategy based on analyses and interpretations of data, with an emphasis on environmental ctatistics and decision analysis. Merion Station, Pennsylvania. |
| Resources & Systems International, Inc.: Specializing in watershed management, multi-aquifer groundwater systems, surface water resources, and litigation support. Based in Blacksburg, Virginia. |
| RGA Environmental, Inc.: Providing hazardous materials management, occupational health and safety, and environmental site assessment consulting, and engineering services. Based in California. |
| Richard L. Meehan: Specializing in geotechnical, hydrological and environmental engineering, failure analysis and investigations. Located in California. |
| Risk Management Incorporated: Specializing in the assessment and management of risk from exposures to chemical and radiological hazards. Based in Massachusetts. |
| Ron Joseph & Associates, Inc.: Offering consulting services and expert testimony for matters involving paints, coatings and solvents, including environmental issues, regulatory compliance, equipment and facilities design, and injury cases. Located in California. |
| Scientific Control Laboratories, Inc.: Expert consultation and lab services on environmental and industrial issues. |
| Shield Environmental Associates, Inc.: Offering environmental services, including preliminary investigations, reports, studies, recommendations, preparation of design drawings and construction management. Based in Kentucky. |
| Silicon Valley Coating Consultants: Coating and corrosion consultants, experts in litigation witness, failure analysis, finishing defects, environmental regulations, and materials failures. |
| Stone Lions Environmental Corporation: California firm, evaluating refining, petrochemical, and chemical operations, and associated toxic exposure problems. |
| Sullivan Environmental Consulting Inc.: Expert testimony for meteorological and air quality related litigation. Alexandria, Virginia. |
| Technical Sciences Group, Inc.: Consulting for the chemical, agrochemical, biotech, food products and animal health industries. |
| The Brattle Group: Providing consulting services concentrated in the areas environmental matters, finance, litigation, and utilities. Offices in Cambridge, Massachusetts, Washington D.C., and London, England. |
| The Forrester Group Inc.: Environmental management services, including business management, regulatory compliance, voluntary cleanup programs and contaminated property acquisitions. Based in Missouri. |
| The Noise Consultancy, LLC: Noise enforcement and code compliance experts, offering a full range of noise-related services. |
| TRC Companies, Inc.: Environmental engineering and consulting, from offices throughout the United States. |
| Tri-S Environmental, Inc.: Sensible strategies and solutions for the environment. |
| Trillium, Inc.: Pennsylvania consulting firm, emphasizing environmental chemistry. |
| Waid & Associates: Air quality services, particularly emissions control, permitting, and compliance. Based in Texas. |
| Water Resources Consulting Services: Civil engineering consulting firm in the field of surface water resources hydrology and hydraulics, with offices in northern California and Nevada. |
| Whitman Companies, Inc.: Environmental engineering and management services. Based in New Jersey. |
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