CHMSP key terms

A federal law that funds and directs cleanup of releases of hazardous substances and assigns liability to potentially responsible parties. It also created the Superfund program and requires reporting of certain releases.

A federal statute governing generation, transport, treatment, storage, and disposal of solid and hazardous waste. It establishes the cradle-to-grave framework, generator categories, and minimum technical standards for facilities.

A federal law requiring facilities to report hazardous chemical inventories and releases to emergency planners and the public. It supports community right-to-know and local emergency planning committees.

A shipping document that accompanies hazardous waste from its point of generation to an off-site receiving facility. It tracks custody, supports cradle-to-grave accountability, and must be signed by each handler.

The threshold amount of a hazardous substance that, when released within 24 hours, triggers federal notification requirements. RQs are substance-specific and appear in regulations and shipping papers.

A standardized document providing hazard, handling, and emergency information for a chemical product. It contains sixteen sections covering identification, composition, first aid, firefighting, accidental release, storage, and disposal.

The principle that hazardous waste generators remain responsible for their waste from creation through final disposal, even after it leaves their site. It drives careful selection of transporters and disposal facilities.

Waste that exhibits at least one regulated property: ignitability, corrosivity, reactivity, or toxicity. It is identified by testing or by knowledge of the waste and is regulated even without being specifically listed.

A hazardous waste generator that produces at least 1,000 kilograms per month or more than 1 kilogram per month of acutely hazardous waste. LQGs face stricter accumulation, training, and reporting requirements.

A site-specific plan required for facilities that store certain quantities of oil, designed to prevent discharges to navigable waters. It includes containment, inspection, training, and response procedures.

An OSHA rule requiring employers to manage highly hazardous chemicals through process hazard analysis, operating procedures, training, mechanical integrity, and emergency planning. It aims to prevent catastrophic releases.

The dose of a substance that kills half of a test population under defined conditions, usually expressed as milligrams per kilogram of body weight. Lower values indicate greater acute toxicity.

The concentration of a substance in air or water that kills half of a test population during a specified exposure period. It is used to compare acute inhalation or aquatic toxicity.

The net buildup of a substance in an organism from all exposure routes, including food, water, and air. It reflects uptake and elimination rates and can lead to body burdens above environmental concentrations.

The increase in concentration of a persistent substance at successively higher levels of a food chain. It occurs when organisms retain contaminants faster than they excrete or metabolize them.

A ratio of a chemical's concentration in octanol to its concentration in water at equilibrium. Higher values indicate greater lipid solubility and tendency to bioaccumulate.

The lowest temperature at which a liquid gives off enough vapor to form an ignitable mixture with air near its surface. It is used to classify flammable and combustible liquids.

The pressure exerted by a substance's vapor when it is in equilibrium with its liquid or solid at a given temperature. Higher values indicate greater volatility and potential for inhalation exposure.

The observed relationship between the amount of a substance administered or absorbed and the intensity of the resulting biological effect. It is fundamental to toxicity assessment and risk characterization.

The route by which a person or ecological receptor comes into contact with a contaminant, including source, medium, exposure point, and route of entry. It is used in risk assessment to link contamination to receptors.

An occupational exposure limit set by OSHA as the maximum permissible airborne concentration of a substance over a typical work shift. It is enforceable and may be adjusted for extended shifts.

A concentration of an airborne contaminant that poses an immediate threat to life, would cause irreversible health effects, or would impair escape. It guides respirator selection and emergency response decisions.

An occupational exposure limit for a short-term exposure, typically fifteen minutes, that should not be exceeded at any time during the workday. It protects against acute effects from brief high concentrations.

Equipment worn or used by workers to protect against chemical, physical, or biological hazards. Examples include gloves, goggles, aprons, and respirators, selected based on hazard assessment.

A procedure that checks whether a respirator seals properly against the user's face. Qualitative tests detect leakage by taste or smell; quantitative tests measure leakage numerically.

An enclosed or partially enclosed space with limited entry and exit, not designed for continuous occupancy, and potentially hazardous due to atmosphere, engulfment, or configuration. Entry requires evaluation and controls.

A program of periodic health evaluations for workers exposed to specific hazards, intended to detect adverse effects early. It may include history, physical exams, and biological monitoring.

A standardized, scalable command structure used to manage emergency response operations. It defines roles, span of control, and common terminology to coordinate multiple agencies and resources.

A national framework that provides common standards for incident management across agencies and jurisdictions. It integrates command, resource management, communications, and preparedness activities.

A reference book used by first responders to identify initial isolation and protective action distances for hazardous materials incidents. It organizes materials by UN number and guide number.

The area immediately surrounding a hazardous materials release where contamination or serious harm is possible. Only trained personnel in appropriate protective equipment may enter.

The process of removing or neutralizing contaminants from people, equipment, or surfaces to prevent spread and exposure. It is typically conducted between the hot and cold zones.

An incident management arrangement in which multiple agencies with jurisdictional or functional responsibility jointly set objectives and direct response operations. It preserves individual authority while ensuring coordinated action.

An engineered disposal facility with liners, leachate collection, and cover systems designed to contain hazardous waste and limit releases. It requires monitoring and long-term care after closure.

A thermal treatment process that destroys hazardous organic constituents by high-temperature combustion. It reduces volume and toxicity but requires air pollution controls and ash management.

A treatment that mixes waste with binders to reduce mobility of contaminants or improve physical handling. Solidification encapsulates waste; stabilization chemically immobilizes contaminants.

A treatment that uses microorganisms to degrade or transform contaminants in soil, groundwater, or waste. It may be enhanced by adding nutrients, oxygen, or specialized cultures.

A remediation method that extracts contaminated groundwater, treats it above ground, and often reinjects or discharges the cleaned water. It controls plumes but may require long operating periods.

A remediation technique that applies vacuum to soil to draw volatile contaminants into extraction wells for above-ground treatment. It works best in permeable, unsaturated soils with volatile compounds.

The regulatory process for investigating and cleaning up releases at hazardous waste treatment, storage, and disposal facilities. It addresses soil, groundwater, and other media under a facility-wide approach.