CHMP key terms

A multi-part shipping document that travels with hazardous waste from its point of generation to its final destination, listing generator, transporter, and receiving facility, waste codes, and quantities. Signed copies track custody and support exception reporting.

The principle that a hazardous waste generator remains responsible for the waste from creation through final disposal, even after it leaves the site. Liability can persist if waste is mismanaged at a later facility.

An alphanumeric identifier assigned to a specific hazardous waste type under federal or state rules, such as listed or characteristic codes. Codes determine handling, accumulation, and disposal requirements and must appear on shipping papers.

Waste classified as hazardous because it exhibits one or more defined properties: ignitability, corrosivity, reactivity, or toxicity. Testing or generator knowledge establishes whether a waste meets a characteristic and requires hazardous waste management.

Waste specifically named on regulatory lists as hazardous, regardless of whether it exhibits a characteristic. Listing may depend on the process that generated it or on its chemical constituents.

A standardized document providing hazard, composition, first-aid, firefighting, handling, storage, and exposure-control information for a chemical product. Employers must keep them accessible to workers and use them to build protective programs.

An international framework for classifying chemicals and communicating hazards through standardized labels, pictograms, signal words, and safety data sheets. It creates consistent hazard communication across countries and supply chains.

An employer's written program ensuring workers know the hazards of chemicals they use, covering labels, safety data sheets, training, and a chemical inventory. It must be updated when new hazards are introduced.

A regulatory limit on the airborne concentration of a substance to which a worker may be exposed over a specified period, usually an eight-hour shift. It drives monitoring, engineering controls, and respiratory protection decisions.

An atmospheric condition that poses an immediate threat of death, irreversible health effects, or inability to escape. It determines whether supplied-air respiratory protection and specific entry procedures are mandatory.

Clothing and equipment worn to shield workers from chemical, physical, or biological hazards, including gloves, suits, boots, and respirators. Selection depends on hazard assessment, compatibility, and exposure potential.

The highest level of chemical protective clothing, consisting of a fully encapsulating vapor-tight suit with self-contained breathing apparatus. It is used where the highest respiratory and skin hazards exist.

A respiratory protection device supplying breathable air from a portable cylinder worn by the user. It permits work in oxygen-deficient or IDLH atmospheres independent of ambient air quality.

A standardized, modular management structure used to coordinate emergency response across agencies and jurisdictions. It organizes command, operations, planning, logistics, and finance functions under a single incident commander.

An incident management arrangement in which multiple agencies with jurisdiction jointly set objectives and strategy through one coordinated command. It preserves each agency's authority while ensuring a single set of priorities.

A written authorization controlling entry into a permit-required confined space or hazardous area, documenting atmospheric testing, isolation, hazards, and required controls. It must be completed before entry and closed out afterward.

A space large enough for entry, with limited means of entry or exit, not designed for continuous occupancy. Permit-required spaces add hazards such as engulfment, hazardous atmosphere, or entrapment.

A reference used by first responders to identify initial isolation distances and protective actions for hazardous materials incidents based on placards, labels, and material names. It supports the earliest decisions before detailed data arrive.

A diamond-shaped warning sign affixed to vehicles, tanks, or containers showing a hazard class and, for some shipments, an identification number. It gives responders rapid information about the material's primary hazard.

A four-digit code assigned internationally to a specific hazardous material or group of materials, displayed on shipping papers and often on placards or orange panels. It links responders to emergency response information.

An area established around a hazardous materials release to keep unauthorized people away and separate hot, warm, and cold operational zones. Distances may be set by reference guides, monitoring, or incident conditions.

The innermost controlled area at a hazmat incident where only essential personnel with appropriate protection may operate. It is bounded by a contamination control line and managed through entry and exit logging.

A defined sequence of stations where people and equipment are cleaned of contaminants before leaving the exclusion zone. It prevents spreading hazardous material to clean areas and the community.

The systematic measurement of airborne contaminants or conditions such as oxygen, combustibles, and toxic gases to characterize exposure and guide decisions. Real-time instruments support entry decisions and confirm an area is safe.

A field instrument that ionizes airborne organic vapors with ultraviolet light and measures the resulting current to estimate total volatile organic concentration. Readings are non-specific and require correction factors for individual compounds.

The minimum concentration of a combustible gas or vapor in air below which ignition cannot occur. Monitoring against this value, often as a percentage, determines when an atmosphere is unsafe for entry or hot work.

A field instrument that measures the concentration of flammable gases or vapors in air, typically displayed as a percentage of the lower explosive limit. It is a core tool for initial atmospheric screening.

A laboratory test that simulates leaching of waste in a landfill to determine whether it releases regulated contaminants above threshold levels. Results support waste classification and disposal decisions.

An organic chemical that readily evaporates at ordinary temperatures and can contribute to air pollution and inhalation exposure. Many are regulated in air, water, and soil media and are common targets of field screening.

A documented, unbroken record of who collected, handled, transported, and stored a sample, with dates and signatures. It preserves the legal defensibility and integrity of analytical results.

A written plan specifying project objectives, sampling design, analytical methods, data quality indicators, and quality control procedures. It ensures data are sufficient for their intended regulatory or technical use.

A systematic planning process that defines the type, quantity, and quality of data needed to support a specific decision. Clear objectives prevent unnecessary sampling and ensure results can withstand scrutiny.

Procedures such as cooling, chemical addition, or sealing that maintain a sample's chemical and physical integrity from collection to analysis. Correct preservation prevents biodegradation, volatilization, and precipitation.

The maximum period a sample may be stored before analysis without invalidating results. Exceeding it can cause analyte loss or transformation and may require resampling.

The phased process of characterizing a site's geology, hydrology, and contamination to determine the nature and extent of releases. It combines records review, sampling, and interpretation to support remediation decisions.

A comprehensive study conducted after a release is confirmed to define contamination extent, risks, and potential cleanup alternatives. It forms the technical basis for feasibility studies and remedy selection.

An analysis that develops and evaluates cleanup alternatives against criteria such as effectiveness, cost, and regulatory compliance. It supports selection of a preferred remedy for a contaminated site.

The construction and operation of a selected cleanup remedy, such as soil excavation, groundwater treatment, or vapor extraction. It aims to reduce contaminant risk to acceptable levels under an approved plan.

Remediation performed in place without excavating or pumping material to the surface, including chemical oxidation, bioremediation, or thermal treatment. It can reduce disturbance and cost but requires careful subsurface characterization.

A remedy relying on natural physical, chemical, and biological processes to reduce contaminant concentrations, verified through long-term monitoring. It requires demonstrated effectiveness and institutional controls to remain protective.

The federal law authorizing response to releases of hazardous substances and cleanup of contaminated sites, including cost recovery from responsible parties. It frames investigation, remedy selection, and long-term site management obligations.

A classification based on the quantity of hazardous waste produced per month, which sets accumulation time limits, training, contingency planning, and reporting requirements. Status can change as operations change.

A designated location near the point of generation where hazardous waste is accumulated under specific quantity and time limits before consolidation. Containers must be closed, labeled, and inspected.

The practices governing hazardous waste containers, including compatibility, closure, labeling, inspection, and stacking. Proper management prevents releases, fires, and regulatory violations.

Source reduction and recycling activities that reduce the quantity or toxicity of waste generated. It is a preferred hierarchy element and can lower regulatory burden and disposal costs.

A documented set of procedures for responding to fires, explosions, spills, or other releases at a hazardous waste facility, including personnel roles and emergency equipment. It must be maintained and communicated to responders.