Advanced Materials Center, Inc.
   Environmental services, and materials and products evaluation and testing. Based in Illinois.
   http://amclabs.net

Advanced Waste Management Systems, Inc.
   Hazardous waste management, overseas environmental project management, and environmental site evaluations. Based in Tennessee.
   http://www.awm.net/

American Management Resources Corp.
   Offering environmental professional design services, and environmental audits. Located in Florida.
   http://www.amrc-environmental.com/

Ami Adini & Associates, Inc.
   Los Angeles, California-based specialists in environmental consulting, site impact assessments, hazardous waste, and storage tank issues.
   http://www.amiadini.com/

Atlantic Environmental Inc.
   Environmental, industrial hygiene and safety consulting and testing, chemical exposure, and indoor air quality experts. Located in New Jersey.
   http://www.atlenv.com/

Block Environmental Services
   Environmental and laboratory services. Based in California.
   http://www.blockenviron.com/

Breedlove, Dennis & Associates
   Diversified environmental consulting firm, with offices in Florida and Tennessee.
   http://www.bda-inc.com/

Cambridge Environmental, Inc.
   Assessing and helping to minimize risks to health and the environment. Based in Massachusetts.
   http://www.cambridgeenvironmental.com/

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.
   http://www.mdcampbell.com/

Chambers & Associates
   Consulting Firm specializing in the conservation of marine fish and their essential habitats. Based in Kensington, Maryland.
   http://www.chambers-associates.org

Clement Mesavage, Jr.
   Consultant for environmental, safety, and health litigation, based in Virginia.
   http://www.usaclem.com/

Custom Environmental Services
   Small, California-based consulting firm, assisting with environmental compliance, and providing expert testimony for Phase I Site Assessments.
   http://www.custom-env.com/

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
   http://www.dbstephens.com/

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.
   http://www.occupationalepi.com/

EBA Waste Technologies
   California waste management consulting and engineering firm.
   http://www.ebawaste.com/

ENSR
   Specializing in solving and preventing a broad range of environmental problems for industry. Located in Massachusetts.
   http://www.ensr.com/

ETS Inc.
   Air quality consulting firm, specializing in air emissions control, measurement, training, design, troubleshooting, and regulatory services. Roanoke, Virginia.
   http://www.etsi-inc.com

Eagle Industrial Hygiene Associates
   Industrial hygiene services custom-tailored to client needs. Based in Pennsylvania.
   http://www.eagleih.com/

Earthward Consulting
   Consultations, computer simulations, and expert testimony regarding groundwater analysis, deep well injection, and SWIFT.
   http://www.earthwardconsulting.com/

Environmental & Turf Services, Inc.
   Expertise in lead and arsenic contamination of shooting ranges. Based in Maryland.
   http://www.environmentalandturf.com/

Environmental Liability Management, Inc.
   Risk management specializing in industrial and commercial properties. Based in New Jersey.
   http://www.elminc.com/

Environmental Litigation Associates
   Seven senior environmental scientists and engineers serving the legal community on a broad range of environmental and scientific matters.
   http://www.ela-iet.com/texasnew/ela/main/

Environmental Systems & Technologies, Inc.
   Environmental and computer technology experts, based in Virginia.
   http://www.esnt.com/

Epihealth Associates
   Environmental health, public health and infectious disease epidemiological investigation and litigation support services. Based in Maryland.
   http://www.ehagroup.com/

First Environment, Inc.
   New Jersey firm, providing services for environmental management, site investigation, and regulation.
   http://www.firstenvironment.com/

Gershman, Brickner & Bratton, Inc.
   Virginia firm, providing litigation support, dispute resolution, and other consulting services to the waste management industry.
   http://www.gbbinc.com/

HSA Environmental
   Offering environmental and geotechnical engineering, construction materials testing, industrial hygiene, and information management services. Offices in Florida and South Carolina.
   http://www.hsa-env.com/

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.
   http://www.heritageservices.com/

Hitchings Associates, P.C.
   Industrial hygiene consulting firm specializing in laboratory planning, safety and design, industrial ventilation, and indoor air quality. Located in Indiana.
   http://www.safelab.com/

HydroGeoLogic, Inc.
   Services include soil and groundwater contaminant assessment and remediation, environmental compliance audits, risk assessment, and water supply investigations. Based in Virginia.
   http://www.hgl.com/

Integrated Environmental Management, Inc.
   Consulting and services in the areas of radiation, radioactivity, nuclear science, safety and the environment.
   http://www.iem-inc.com

Intertox, Inc.
   Environmental and public health consulting firm, focusing on human health and ecological risk assessment. Seattle, Washington.
   http://www.intertox.com/

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.
   http://www.johnsonenviro.com/

Lake Engineering, Inc.
   Full service environmental engineering consultants, based in Georgia.
   http://www.lakeeng.com/

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.
   http://www.dole.nu/lesdole/

MET Associates
   Providing expert testimony and litigation support for forensic meteorology, air pollution modeling, air dispersion analysis, and toxic tort cases. Based in Texas.
   http://www.metassociates.net/

Mearns Consulting Corp.
   Providing solutions for environmental problems ranging from investigations and assessments to remediation. Located in California.
   http://www.mearnsconsulting.com/

Mercury Technology Services
   Texas firm, specializing in environmental issues involving mercury.
   http://www.hgtech.com/

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.
   http://www.nutterinc.com/

Pilko & Associates, Inc.
   Providing management-oriented solutions to complex environmental, health and safety challenges. Offices in California and New Jersey.
   http://www.pilko.com/

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.
   http://www.plateaueco.com/

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.
   http://www.quantdec.com/

RGA Environmental, Inc.
   Providing hazardous materials management, occupational health and safety, and environmental site assessment consulting, and engineering services. Based in California.
   http://www.rgaenv.com/

Resources & Systems International, Inc.
   Specializing in watershed management, multi-aquifer groundwater systems, surface water resources, and litigation support. Based in Blacksburg, Virginia.
   http://www.rasint.com/

Richard L. Meehan
   Specializing in geotechnical, hydrological and environmental engineering, failure analysis and investigations. Located in California.
   http://www.stanford.edu/~meehan/la/

Risk Management Incorporated
   Specializing in the assessment and management of risk from exposures to chemical and radiological hazards. Based in Massachusetts.
   http://www.riskmi.com/

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.
   http://www.ronjoseph.com/

Scientific Control Laboratories, Inc.
   Expert consultation and lab services on environmental and industrial issues.
   http://www.sclweb.com

Shield Environmental Associates, Inc.
   Offering environmental services, including preliminary investigations, reports, studies, recommendations, preparation of design drawings and construction management. Based in Kentucky.
   http://www.shieldenv.com/

Silicon Valley Coating Consultants
   Coating and corrosion consultants, experts in litigation witness, failure analysis, finishing defects, environmental regulations, and materials failures.
   http://www.paints-consultants.com/

Stone Lions Environmental Corporation
   California firm, evaluating refining, petrochemical, and chemical operations, and associated toxic exposure problems.
   http://www.stonelions.com/

Sullivan Environmental Consulting Inc.
   Expert testimony for meteorological and air quality related litigation. Alexandria, Virginia.
   http://www.sullivan-environmental.com/

TRC Companies, Inc.
   Environmental engineering and consulting, from offices throughout the United States.
   http://www.trcsolutions.com/

Technical Sciences Group, Inc.
   Consulting for the chemical, agrochemical, biotech, food products and animal health industries.
   http://www.tsgusa.com/

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.
   http://www.brattle.com/

The Forrester Group Inc.
   Environmental management services, including business management, regulatory compliance, voluntary cleanup programs and contaminated property acquisitions. Based in Missouri.
   http://www.forrestergroup.com/

The Noise Consultancy, LLC
   Noise enforcement and code compliance experts, offering a full range of noise-related services.
   http://www.noiseconsultancy.com/

Tri-S Environmental, Inc.
   Sensible strategies and solutions for the environment.
   http://www.tri-s.com/

Trillium, Inc.
   Pennsylvania consulting firm, emphasizing environmental chemistry.
   http://www.trilliuminc.com/

Waid & Associates
   Air quality services, particularly emissions control, permitting, and compliance. Based in Texas.
   http://www.waid.com/

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.
   http://www.waterengr.com/wrcs/

Whitman Companies, Inc.
   Environmental engineering and management services. Based in New Jersey.
   http://www.whitmanco.com/