Chemical Reference Information
http://www.cdpr.ca.gov/docs/epa/epachem.htm

Commerce Business Daily – Government’s “free” Electronic Version
http://cbdnet.access.gpo.gov/

Dredged Material, Inland Testing Manual (EPA Document)
http://www.epa.gov/ostwater/itm/index.html

Environment News Service
http://www.ens-news.com/

Environmental Publications – EPA National Service Center
http://www.epa.gov/ncepihom/

Environmental Publications – EPA Office of Science and Technology
http://www.epa.gov/ost/pctoc.html

Environmental Yellow Pages
http://www.enviroyellowpages.com/

EPA Quality System – environmental data collection, generation, and use
http://www.epa.gov/quality/

Garden State (NJ) EnviroNews
http://www.gsenet.org/

Environmental Directory Online
http://www.envirodirectory.com/

Pennsylvania Spatial Data Access
http://www.pasda.psu.edu/

SW-846 Methods Information
http://www.epa.gov/sw-846/mice.htm

Terraserver - Aerial Photographs from around the Globe
http://www.terraserver.microsoft.com/

USGS Mapping
http://mapping.usgs.gov/
Environmental Protection Agency (EPA)
http://www.epa.gov/

EPA Region 1 - Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island, Vermont
http://www.epa.gov/region1/

EPA Region 2 - New Jersey, New York, Puerto Rico, Virgin Islands
http://www.epa.gov/region2/

EPA Region 3 - Delaware, Maryland, Pennsylvania, Virginia,
West Virginia, District of Columbia
http://www.epa.gov/region3/

National Environmental Laboratory Accreditation Conference (NELAC)
http://www.epa.gov/ttn/nelac/

National Oceanic & Atmospheric Administration (NOAA)
http://www.noaa.gov/

Navy Environmental Sampling & Testing Programs
http://www.navylabs.navy.mil/

Occupational Safety & Health Administration (OSHA)
http://www.osha.gov/

U.S. Army Corps of Engineers (USACE)
http://www.usace.army.mil/

U.S. Department of Agriculture (USDA)
http://www.usda.gov/

U.S. Food & Drug Administration (FDA)
http://www.fda.gov/

U.S. General Services Administration (GSA)
http://www.gsa.gov/

U.S. Geological Survey (USGS)
http://www.usgs.gov/
Brownfields Information
http://www.epa.gov/brownfields/

Field Analytical Technologies Encyclopedia
http://fate.clu-in.org/

Hazardous Waste Clean-up Information
http://www.clu-in.org/

Indoor Air Quality
http://www.epa.gov/iaq/

Superfund Enforcement
http://es.epa.gov/oeca/osre/

Superfund Enforcement Documents
http://es.epa.gov/oeca/osre/osredoc.html

Superfund Information (non-Enforcement)
http://www.epa.gov/superfund/

Underground Storage Tanks
http://www.epa.gov/swerust1/
Delaware Department of National Resources and Environmental Control (DNREC)
http://www.dnrec.state.de.us/

New Jersey Department of Environmental Protection (NJDEP)
http://www.state.nj.us/dep/

New York Department of Environmental Conservation (NYDEC)
http://www.dec.state.ny.us/

Pennsylvania Department of Environmental Protection (PADEP)
http://www.dep.state.pa.us/
American Society for Testing and Materials (ASTM)
http://www.astm.org/

American Chemical Society (ACS)
http://www.acs.org/

American Council of Independent Laboratories (ACIL)
http://www.acil.org/

American Industrial Hygiene Association (AIHA)
http://www.aiha.org/

American Petroleum Institute (API)
http://www.api.org/

Environmental Assessment Association (EAA)
http://www.iami.org/eaa.cfm

National Environmental Laboratory Accreditation Conference (NELAC)
http://www.epa.gov/ttn/nelac/

National Groundwater Association (NGWA)
http://www.ngwa.org/

Society of Environmental Toxicology and Chemistry (SETAC)
http://www.setac.org/

Society of Women Environmental Professionals (SWEP)
http://www.swep.org/
Federal Register
http://www.access.gpo.gov/su_docs/aces/aces140.html

Code of Federal Regulations
http://www.access.gpo.gov/nara/cfr/index.html

Government Printing Office (US Code)
http://www.access.gpo.gov/su_docs/aces/aaces002.html
Dogpile – searches multiple search engines
http://www.dogpile.com/

Hotbot – good scientific search engine
http://www.hotbot.com/