Tri-S Environmental, Inc.

Sensible strategies and solutions for the environment.
http://www.tri-s.com/

Scientific Control Laboratories, Inc.

Expert consultation and lab services on environmental and industrial issues.
http://www.sclweb.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

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/

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/

American Management Resources Corp.

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

Earthward Consulting

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

The Noise Consultancy, LLC

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

James M. Seltzer, MD

Offering consultation and expert testimony in California for environmental medicine, indoor air quality, industrial hygiene, and related issues.
http://www.indoorenvirons.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

Heritage Technical Services, Inc.

Providing environmental and engineering consulting to clients in the private and public sectors, throughout the Mid-Atlantic region. Based in West Chester, Pennsylvania.
http://www.heritageservices.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/

Mercury Technology Services

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

Technical Sciences Group, Inc.

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

Trillium, Inc.

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

Cambridge Environmental, Inc.

Assessing and helping to minimize risks to health and the environment. Based in Massachusetts.
http://www.cambridgeenvironmental.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/

Crouse Enterprises Inc.

Engineering and science service company with emphasis on environmental, waste management and remedial construction. Located in Pennsylvania.
http://www.crouse.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/

ENSR

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

Ninyo & Moore

Geotechnical and environmental engineers, based in California.
http://www.ninyoandmoore.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/

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/

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/

Integrated Environmental Management, Inc.

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

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/

Advanced Materials Center, Inc.

Environmental services, and materials and products evaluation and testing. Based in Illinois.
http://www.amc-testlabs.com/

Advanced Waste Management Systems, Inc.

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

Block Environmental Services

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

Aquatic Environmental Consultants

Ecological surveys and impact assessments of projects affecting rivers, estuaries and coastal waters. Based in the United Kingdom.
http://home.rednet.co.uk/homepages/earth/

Breedlove, Dennis & Associates

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

Clement Mesavage, Jr.

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

Environmental & Turf Services, Inc.

Expertise in lead and arsenic contamination of shooting ranges. Based in Maryland.
http://www.environmentalandturf.com/

David E. Smink, P.E.

Addressing environmental issues in the oil, gas, and petroleum industries. Based in Colorado.
http://members.aol.com/desminkpe/

Eagle Industrial Hygiene Associates

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

EBA Waste Technologies

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

EnviroBusiness, Inc.

Massachusetts firm, offering environmental health and safety management, occupational health and safety, industrial hygiene, air quality, semiconductor safety, bio-safety, and safety engineering services.
http://www.ebi-net.com/

Environmental Liability Management, Inc.

Risk management specializing in industrial and commercial properties. Based in New Jersey.
http://www.elminc.com/

Environmental Systems & Technologies, Inc.

Environmental and computer technology experts, based in Virginia.
http://www.esnt.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/

Lake Engineering, Inc.

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

Mearns Consulting Corp.

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

J. Mike DiGiglia, LLC

Toxic tort and environmental regulatory consultant, based in Woodland Park, Colorado.
http://www.toxicchemicalexposure.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/

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/

Okie Environmental & Consulting Services

Experts in environmental regulatory compliance and remediation of hazardous waste contaminated sites. Located in Oklahoma.
http://www.severconsulting.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/

Stone Lions Environmental Corporation

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

Professional Analytical and Consulting Services, Inc.

Providing services for major environmental cases involving water and air quality, drugs, and activated carbon. Based in Pennsylvania.
http://members.aol.com/hnpacs/pacs.htm

Site Environmental & Acquisition Services, Inc.

Providing a wide variety of environmental consulting and remediation contracting services. Benton, Arkansas.
http://www.seasco.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/

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/

Intertox, Inc.

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

TRC Companies, Inc.

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

Environmental Remediation & Consulting

Independent environmental consultant providing litigation support for hazardous waste investigation and remediation. Based in California.
http://firms.findlaw.com/garycronk/

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/

Sullivan Environmental Consulting Inc.

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

Epihealth Associates

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

Richard L. Meehan

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

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/

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/