Environmental Planning
Environmental planning is the domain where land-use decisions are tested against environmental health outcomes. The exam probes whether you can trace how zoning, siting, and development approvals change human exposure, and whether you can justify controls with evidence rather than fixed rules of thumb.
Core principles
- The source–pathway–receptor model is the backbone: planning interventions work by separating sources from receptors, blocking pathways, or reducing source strength.
- Zoning is the main legal lever. Use-based zoning separates incompatible uses; performance zoning sets outcome limits for noise, odour, traffic, and emissions. Neither is automatically health-protective.
- Buffer distances must be derived from pollutant fate and transport, terrain, meteorology, and operating hours-not copied from a generic table.
- Sensitive receptors include homes, schools, childcare, hospitals, aged care, and outdoor recreation areas. Children, older adults, and people with cardiorespiratory disease face higher susceptibility.
- Cumulative impact assessment considers background concentrations, multiple nearby sources, and future permitted development.
- Environmental justice requires identifying disproportionate burdens and ensuring meaningful participation, not just equal treatment on paper.
- EIA and HIA are decision-support tools: screening, scoping, baseline, alternatives, prediction, mitigation, monitoring. EIA focuses on biophysical effects; HIA focuses on health determinants and equity.
Worked example
A waste transfer station is proposed 150 m from a primary school, with diesel trucks routed past the playground. Fixed separation tables are inconclusive. Identify the receptor (children), pathways (PM2.5, NO2, odour, noise), and source terms (truck counts, idling, enclosed versus open tipping). Compare predicted concentrations plus background against health-based benchmarks. Then evaluate alternatives: rerouting trucks, enclosure and negative pressure, restricted operating hours, and a larger vegetated buffer. Recommend conditional approval with monitoring and a complaint-response protocol. The reasoning matters more than the distance alone.
Traps
- Treating a generic buffer as proof of safety.
- Ignoring background and cumulative loads.
- Confusing EIA with a pollution permit.
- Overlooking indirect effects such as induced traffic and displacement.
- Assuming consultation equals consent.
- Using annual averages when peak exposures drive acute effects.