228
GLOSSARY
mable materials that produce the hazardous atmosphere. There are three classes of electrical locations:
1) Class I Locations—Flammable gases or vapors may be present in quantities sufficient to produce explosive or ignitible mixtures.
2) Class II Locations—Concentrations of com- bustible dusts may be present (e.g., coal or grain dust).
3) Class III Locations—Areas concerned with the presence of easily-ignitible fibers or fly- ings (e.g., cotton milling).
Clean Water Act (CWA). Federal legislation that resulted in EPA and state regulations and stan- dards governing drinking water quality, pollu- tion control, and enforcement. The Oil Pollution Act (OPA) amended the CWA and authorized regulations pertaining to oil spill preparedness, planning, response, and clean-up.
Code of Federal Regulations (CFR). A collec- tion of regulations established by federal law. Contact with the agency that issues the regula- tion is recommended for both details and inter- pretation.
Cold Zone. The hazard control zone of a hazmat incident that contains the incident command post and other support functions deemed neces- sary to control the incident. This zone may also be referred to as the clean zone or the support zone.
Colorimetric Indicator Tubes. Detection/moni- toring instrument that measures the concentra- tion of specific gases and vapors in air.
Combined Sewers. Carries domestic waste- water as well as storm water and industrial wastewater. These systems are quite common in older cities. Combined sewers may also have regulators or diversion structures that allow overflow directly to rivers or streams during major storm events.
Combustible Gas Indicator (CGI). A type of monitoring/detection device that measures the concentration of a combustible gas or vapor in air.
Command. The act of directing, ordering, and/or controlling resources by virtue of explicit legal, agency, or delegated authority.
Command Staff. The command staff report directly to the Incident Commander and consist of the Public Information Officer, the Safety Officer, and the Liaison Officer.
Common Ground Alliance. A member-driven association dedicated to ensuring public safety, environmental protection, and the integrity of services by promoting effective damage preven- tion practices.
http://www.commongroundal-
liance.com
Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). Known as CERCLA or SUPERFUND, it address- es hazardous substance releases into the environ- ment and the cleanup of inactive hazardous waste sites. It also requires those who release hazardous substances, as defined by the Environmental Protection Agency (EPA), above certain levels (known as “reportable quantities”) to notify the National Response Center.
Compressed Natural Gas (CNG). Compressed natural gas, or CNG, is a flammable gas. It is made by compressing natural gas, which is mainly composed of methane (CH4), to less than 1% of the volume it occupies at standard atmos- pheric pressure. It is stored as a liquid at a pres- sure of 200–248 bar (2900–3600 psi), usually in cylindrical or spherical-shaped containers.
Compressor Stations. Pipeline facilities with compressors that are used to boost the pressure on gas pipelines that is lost as a result of friction loss.
Confined Space.A space that (1) is large enough and so configured that an employee can bodily enter and perform assigned work; (2) has limited or restricted means for entry or exit (e.g., tanks, vessels, silos, storage bins, hoppers, vaults, and pits are spaces that may have limited means of entry); and (3) is not designed for continuous employee occupancy.
Confined Space (Permit Required). Has one or more of the following characteristics:
1) Contains or has the potential to contain a haz- ardous atmosphere. A hazardous atmosphere would be created by any of the following, including:
a) Vapors exceed 10% of the lower explosive limit (LEL).
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