Question 2 of 7: Environmental Impact Assessment, Sustainable Development and Ethics

Question 2: Environmental Impact Assessment, Sustainable Development and Ethics (20 marks)

Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.

Part (i) — EIA applied to a northern-Ontario dam

An environmental impact assessment (EIA) is a systematic, staged process that predicts a project’s effects before it is built and forces those effects to shape the design. For a hydroelectric or water-supply dam that would flood valuable land in northern Ontario, the EIA proceeds through screening (does the project trigger federal Impact Assessment Act and Ontario Environmental Assessment Act review — a large dam does), scoping (identifying the valued ecosystem components: fish habitat, wetlands, boreal forest, caribou range, and Indigenous land use), and prediction of impacts (reservoir inundation, altered flow and temperature regime, methylmercury mobilisation in flooded soils, barriers to fish passage, and loss of trapping and harvesting land). The core value of the EIA is the mitigation hierarchy it then imposes: avoid impacts by relocating or resizing the dam and reservoir to spare the most valuable land; minimize by controlling reservoir extent, providing fish passage and environmental (minimum) flows, and staging clearing to limit mercury release; mitigate/restore shorelines and spawning habitat; and compensate through habitat offsets for any residual loss. Meaningful consultation with affected First Nations and the public, and a monitoring/follow-up program with adaptive management, close the loop. Applied this way, the EIA reduces damage and resource loss by redirecting the design toward the least-harm alternative rather than merely documenting harm after the fact.

Part (ii) — Sustainable development and solar power

The key principle of sustainable development, in the Brundtland formulation, is meeting the needs of the present without compromising the ability of future generations to meet their own needs — integrating environmental protection, social equity and economic viability so that natural capital is not drawn down. Solar power advances this principle strongly on the environmental axis: during operation it emits no greenhouse gases or air pollutants, consumes essentially no water, and draws on an effectively inexhaustible flux, so it does not deplete a finite stock the way fossil fuels do. It is therefore highly sustainable in use. It does not, however, satisfy the principle completely: manufacturing panels is energy- and material-intensive (silicon refining, silver, and in thin-film types cadmium or rare metals), land use and habitat disturbance can be significant for utility-scale arrays, output is intermittent and needs storage or backup, and end-of-life panel recycling is still maturing. Judged over the full life cycle, solar power achieves sustainability to a high but not absolute degree: it is a large net improvement over combustion generation and clearly moves toward intergenerational equity, provided the embodied-energy, land-use and material-recovery impacts are themselves managed.

Part (iii) — Ethical response of the supervising engineer

The engineer’s paramount duty under principle (a) is the health, safety and welfare of the public — here, the swimmers at the downstream beach who are protected only if the disinfection system genuinely meets the summer E. coli limit under all flow conditions, not merely at the low-flow, high-CT diurnal minimum. Grab sampling deliberately timed to the most favourable period produces a compliance record that misrepresents true performance and could leave the public exposed during high-flow periods when contact time collapses. Budget overruns and schedule pressure do not relieve the engineer of this duty; commercial convenience cannot outweigh public safety.

The correct actions, in order: first, document the observation objectively and raise it internally — inform the commissioning manager and the regulator’s project authority in writing that the sampling protocol is not representative and that flow-proportional or continuously-monitored, time-weighted sampling across the full diurnal cycle (including peak flow) is required to demonstrate compliance. Recommend continuous residual/UV-intensity monitoring and worst-case verification testing before the plant is certified. Second, do not sign off on or certify results she knows to be unrepresentative; insist the deficiency be corrected and re-tested. Third, if the concern is not resolved and a significant risk to the public remains, principle (c) both permits and requires escalation: report the practice up the regulator’s chain and, if still unaddressed, to the appropriate authority (Ministry of the Environment / public health unit) — and, as principle (c) explicitly allows, she may ethically make the unresolved risk known publicly. Throughout she should act in good faith, keep a factual record, and give the organisation a genuine opportunity to fix the problem before going outside, but she must not let the beach remain protected only on paper.