HKIE Professional Assessment - Environmental Discipline key terms

A statutory process that predicts the environmental consequences of a designated project before approval, documents them in an assessment report, and sets out mitigation and monitoring commitments that later become enforceable conditions.

A formal authorisation issued under the environmental impact assessment ordinance that allows a designated project to be constructed and operated, subject to binding conditions on design, mitigation, monitoring and reporting.

A project type listed in the environmental impact assessment ordinance schedule that must undergo statutory assessment and obtain a permit before work starts, because of its scale or potential environmental effect.

The ordered preference for avoiding an impact at source, then minimising it, then abating or treating it, and only finally compensating for residual effects; used to justify why a chosen measure is the best available option.

The environmental effect that remains after all planned avoidance, reduction and control measures have been applied; it is the quantity compared against standards and used to judge acceptability and compensation needs.

A pre-agreed criterion, combining magnitude, extent, duration, reversibility and sensitivity of receptors, that decides whether a predicted impact is acceptable, needs mitigation, or is a showstopper for the project.

A person, property or ecosystem that could be harmed by a pollutant or disturbance, such as a hospital, school, residential block, shellfish bed or protected habitat, and which anchors the impact assessment.

A location where people may be exposed to airborne pollution for a meaningful period, used as the compliance point for air quality predictions and for siting monitoring stations.

A legally adopted concentration limit for a pollutant over a stated averaging time, against which predicted and measured ambient levels are compared to judge compliance and needed controls.

Mathematical simulation of how emitted pollutants spread and dilute in the atmosphere using source, meteorology and terrain data, producing predicted concentrations at receptors for comparison with standards.

A steady-state dispersion calculation assuming pollutant concentration follows a normal distribution across the plume and downwind, widely used for screening industrial and vehicular emissions.

The depth of the atmospheric layer near the ground through which pollutants are mechanically and thermally mixed; a key input because a shallow layer concentrates emissions and raises predicted concentrations.

A letter classification from A to F describing how strongly the atmosphere suppresses or encourages vertical mixing, derived from wind speed, solar radiation and cloud cover, and used to select dispersion coefficients.

The outcome of a structured comparison of alternatives that delivers the most benefit or least damage to the environment as a whole, at acceptable cost, in the long and short term.

A documented comparison of feasible project alternatives against consistent technical, environmental, cost and deliverability criteria, used to show that the preferred scheme was rationally selected.

The written reasoning that links design decisions to calculated performance, standards and constraints, allowing a reviewer to check that assumptions, margins and trade-offs are defensible.

An independent review of calculations, drawings and specifications by a competent person not responsible for the original design, confirming correctness before construction or submission.

The programme of baseline, compliance and impact monitoring, plus auditing of results against predictions and permit limits, that verifies mitigation works and triggers corrective action when exceedances occur.

Pre-set monitoring thresholds: breaching an action level prompts investigation and preventive measures, while breaching a limit level requires reporting to the authority and remedial action.

A measured value outside a permit limit, standard or predicted range; it must be recorded, investigated for cause, reported and followed by corrective action within agreed timescales.

A documented failure to meet a specified requirement, such as a permit condition, procedure or standard, which must be logged, root-cause analysed, corrected and closed out with verification.

The step taken to eliminate the cause of a detected problem so it does not recur, distinguished from immediate containment, and tracked to closure with evidence of effectiveness.

The structured set of responsibilities, procedures, objectives and reviews by which an organisation controls its environmental aspects, typically certified against the ISO 14001 standard.

A maintained list pairing each activity or service with the environmental aspects it creates and the resulting impacts, ranked by significance, forming the basis for operational controls and objectives.

The recurring cycle of setting objectives, measuring performance, reviewing results and adjusting controls so environmental performance strengthens over time rather than plateauing at a fixed level.

The policy that whoever causes pollution should bear the cost of preventing, controlling or remediating it, so environmental costs are reflected in the price of goods and services rather than borne by society.

Where there are threats of serious or irreversible damage, lack of full scientific certainty shall not be used as a reason for postponing cost-effective measures to prevent environmental degradation.

A charge per tonne imposed on waste sent to landfill, intended to internalise disposal costs and drive waste reduction, sorting and recycling ahead of final disposal.

Mixed material arising from building, excavation and demolition works, managed through reduction at source, on-site sorting, reuse and recycling before any landfill disposal.

The ranked preference of avoidance, reuse, recycling and recovery before treatment and disposal, applied when selecting the most resource-efficient route for a given waste stream.

A use where intruding noise causes annoyance or harm, such as dwellings, schools and hospitals, used to fix assessment points and acceptable noise criteria for the relevant time period.

An authorisation allowing specified construction work during restricted hours, granted only where noise controls and limits set in the permit can be met.

A sound pressure level adjusted to approximate human hearing sensitivity at moderate loudness, expressed in decibels, and the usual descriptor in environmental noise criteria and monitoring.

The set of maximum permissible concentrations and loads for pollutants in a discharge to sewer, river or sea, forming the basis for treatment design and for sampling compliance.

The mass of a pollutant discharged per unit time, calculated as flow multiplied by concentration, which governs the receiving water's assimilative capacity more directly than concentration alone.

The ability of a receiving water or air body to absorb a pollutant load without breaching its quality objectives or causing unacceptable ecological harm.

Systematic investigation of a site or transaction for existing contamination, regulatory breaches and liabilities, so that risks and clean-up costs are known before commitment.

Land where substances present at concentrations above background pose a significant risk to human health or the environment, requiring assessment, remediation and verification before a new use.

The sampling, testing and reporting that demonstrates a clean-up has achieved its agreed targets, producing evidence accepted by the regulator before the site is released for use.

Insurance covering a practitioner or firm against claims of negligent advice, design error or omission, and a common contractual requirement before environmental consultancy services are engaged.

The obligation to exercise reasonable skill and care toward those affected by one's work, including clients, the public and the environment, and to act within one's competence.

A situation where a personal, financial or other interest could improperly influence professional judgement; it must be disclosed and managed, or the engagement declined.

Reporting a genuine concern about wrongdoing, danger or cover-up to an appropriate party, protected when done in good faith through proper channels rather than public disclosure first.

The published rules of the professional institution governing integrity, competence, objectivity and respect, breach of which can lead to disciplinary action against a member.

Structured, recorded learning and reflective practice maintained throughout a career to keep technical knowledge and judgement current, and typically required for registration and membership.

A supported relationship in which an experienced practitioner guides a developing engineer's technical and professional growth through advice, review of work and honest feedback.

A verified log of experience, tasks, responsibilities and reflections used to demonstrate the breadth and depth of development needed for professional assessment.

The reasoned application of knowledge, standards and experience to uncertain or incomplete situations, with assumptions stated and decisions defensible to peers and regulators.