- Alan Stazer, environmental, EMF, radiation law provides consulting and legal representation on environmental issues related to air pollution,hazardous waste, electromagnetic fields (EMF),ionizing radiation and radon.
- BioSystems Analysis, Inc. is a 75-employee environmental consulting firm, specializes in natural and cultural resources consulting services for government, non-profit, and private clients throughout the western United States and the Pacific.
- CAL INC. Environmental Services - Full service environmental firm with expertise in environmental training,site investigations,abatement/remediation and consulting.
- EarthWrites Consulting - A full service consulting firm serving grassroots environmental non profit organizations.
- Ecological Operating Systems - Environmental quality and efficiency as strategic business opportunity: Environmental Management Systems, Integrated EcoAudits, Industrial Ecology
- Ecological Restoration and Mitigation, HRG - Habitat Restoration Group specializes in the evaluation, restoration, enhancement, and creation of native plant communities and fish and wildlife habitats.
- GEO Plexus, Inc. - Engineering Geology and Environmental Management Constulting, Remediation Risk Assessment Consultants
- GK Associates, Inc. - an Environmental Services Company - GK Associates offers environmental consulting, measurement equipment sales and services for a wide variety of applications.
- James Burchill & Associates, Inc. - Public Affairs and Public Relations consulting for Corporations, Developers and Unions in the areas of Governmental Approvals and Enviromental Clean-up in the western states.
- LSA Associates, Inc. - Environmental consulting, CEQA, NEPA, biology/wetlands surveys, restoration, archaeology, paleontology, transportation planning, noise/air quality assessment
- Sampson Engineering Inc. - Consulting engineering and environmental firm serving the western United States.
- Siino Environmental Consulting - Environmental consultant specializing in NEPA and CEQA analyses. Research and preparation of background technical reports.
- Tetra Tech's San Francisco Home Page - Tetra Tech is an environmental consulting firm providing innovative solutions to environmental problems ranging from hazardous waste investigations and remediation to environmental impact analysis and natural resources planning.
- WESTON On The Web - An international team of scientists and engineers working with business and government to economically restore, manage and preserve environmental quality.
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