PCEW key terms

A federal permit, often administered by a state, that authorizes point-source discharges of pollutants into waters of the United States and sets effluent limits, monitoring, and reporting conditions.

A numeric or narrative restriction on the quantity, rate, or concentration of a pollutant that may be discharged from a regulated outfall, expressed as daily maximum, monthly average, or similar basis.

A periodic self-reporting form submitted to the permitting authority that records sampling results, flow, and compliance status for each monitored outfall under an NPDES or pretreatment permit.

The maximum amount of a pollutant a waterbody can receive and still meet water quality standards, allocated among point sources, nonpoint sources, and a margin of safety.

A water segment identified by a state as not meeting applicable water quality standards for one or more pollutants, triggering TMDL development and often stricter permit limits.

A site-specific document identifying potential pollutant sources, describing best management practices, and outlining inspection, training, and recordkeeping procedures for construction or industrial stormwater discharges.

A structural control, operational procedure, or pollution-prevention measure used to reduce or prevent the release of pollutants to stormwater, wastewater, or air.

A publicly owned conveyance system that collects and discharges stormwater to waters of the United States, regulated under permits requiring public education, illicit discharge detection, and construction runoff controls.

Any non-stormwater release into a separate storm sewer system, such as sanitary wastewater, process water, or chemical dumping, that is not authorized by a permit.

The federal law governing generation, transportation, treatment, storage, and disposal of solid and hazardous waste, including cradle-to-grave tracking and corrective action requirements.

One of four measurable properties that make a waste hazardous regardless of its origin: ignitability, corrosivity, reactivity, or toxicity, determined by specified test methods or generator knowledge.

A waste specifically named on a regulatory list because it is generated by a particular industry or process or contains certain toxic constituents, identified by F, K, P, or U codes.

A laboratory extraction test that simulates landfill leaching conditions to determine whether a waste exceeds regulatory concentration limits for toxic constituents.

The documented evaluation a generator performs to decide whether a material is solid waste, hazardous waste, or excluded, using process knowledge, testing, or both.

A multi-part shipping document that accompanies hazardous waste from generator to disposal facility, providing cradle-to-grave tracking and requiring signatures at each transfer point.

A hazardous waste generator that produces at least 1,000 kg per month of hazardous waste or more than 1 kg per month of acutely hazardous waste, triggering the most extensive requirements.

Source reduction and environmentally sound recycling practices that reduce the quantity or toxicity of waste generated, required in generator certifications and often in permit conditions.

A federally enforceable operating permit consolidating all applicable air requirements for a major stationary source, including emission limits, monitoring, recordkeeping, and annual compliance certification.

The maximum capacity of a stationary source to emit a pollutant considering physical and operational limits, used to determine major source status and permit applicability.

A preconstruction permitting program requiring pollution controls and offsets for new or modified major sources that significantly increase emissions, especially in nonattainment areas.

Health-based limits set for six criteria pollutants, including primary and secondary standards, that drive attainment designations and permitting stringency.

A geographic region that violates or contributes to violation of a NAAQS, subject to stricter permitting, emission offsets, and planning requirements.

Instrumentation that samples and analyzes stack emissions on a real-time basis, with data used for compliance demonstration, quality assurance, and regulatory reporting.

The federal statute authorizing response to releases of hazardous substances, establishing liability for responsible parties, and funding cleanup through the Superfund.

The initial phase of site evaluation that compiles historical records and conducts limited sampling to determine whether a release poses a threat warranting further investigation.

A two-part process that characterizes the nature and extent of contamination and evaluates cleanup alternatives against criteria such as protectiveness, cost, and implementability.

The formal agency document selecting the remedial action for a site, documenting the chosen remedy, its rationale, and the response objectives to be achieved.

Any person or entity that may be liable for contamination under CERCLA, including current and past owners, operators, generators, and transporters of hazardous substances.

A non-intrusive property review using records, site reconnaissance, and interviews to identify recognized environmental conditions, typically performed before property transactions.

The presence or likely presence of a hazardous substance or petroleum product on a property due to a release or potential release, identified during an environmental site assessment.

An intrusive investigation involving soil, groundwater, or soil vapor sampling to confirm or rule out contamination suspected from a Phase I assessment.

A documented, unbroken record of who collected, handled, transferred, and stored a sample from collection through analysis, establishing its integrity for legal or regulatory use.

The planned management system and the specific technical checks, such as blanks, duplicates, and calibration, used to ensure monitoring and analytical data meet defined quality objectives.

The systematic review of analytical results against quality control criteria, holding times, and project requirements to determine whether data are usable for their intended purpose.

The lowest concentration of an analyte that can be reliably detected and reported by a specific analytical method, used to judge whether results are above reporting thresholds.

A facility plan required for certain oil storage sites that describes containment, inspection, and response procedures to prevent oil from reaching navigable waters or shorelines.

A written document assigning roles, notification procedures, evacuation routes, and control measures for responding to releases, fires, or other incidents at a facility.

A standardized, scalable organizational framework for managing emergency response, defining roles such as incident commander, safety officer, and operations section.

An occupational exposure limit set by a regulatory agency for airborne contaminants, typically expressed as an eight-hour time-weighted average concentration that workers may be exposed to.

An average exposure concentration calculated over a specified period, such as eight hours, that accounts for varying airborne concentrations across a work shift.

Gear such as respirators, gloves, and eye protection worn to reduce worker exposure, selected based on hazard assessment and requiring training, fit testing, and maintenance.

The requirement to inform and train workers about chemical hazards through labels, safety data sheets, and written programs so they can handle materials safely.