SS Prerequisite: Construction Activity Pollution Prevention
Protecting the site starts before construction beginsโand continues until it ends.
ย What is the Intent of this Prerequisite?
The goal is to:
๐ reduce pollution from construction activities
Specifically:
- soil erosion
- water pollution (sedimentation)
- air pollution (dust)
๐ฏ Big Picture
Construction is temporaryโbut its environmental damage can be permanent if not controlled.
๐ Why This Matters
Construction activities can cause:
- loss of topsoil
- sediment runoff into waterways
- airborne dust
- degradation of nearby ecosystems
๐ The loss of topsoil is one of the most significant impacts of erosion.
๐งฉ Three Key Areas Addressed
This prerequisite focuses on:
- Soil erosion
- Water pollution (sedimentation)
- Air pollution (dust control)
๐ Core Requirement: ESC Plan
What Must the Project Do?
๐ Develop and implement:
๐ Erosion and Sedimentation Control (ESC) Plan
๐ Standards to Follow (VERY IMPORTANT)
The ESC plan must comply with:
๐ 2012 EPA Construction General Permit (CGP)
OR
๐ Local erosion and sedimentation control standards
โ ๏ธ Critical Rule
๐ Follow whichever is MORE stringent
๐ฏ Exam Insight
โEPA OR local codeโ โ always choose the stricter one
โ ๏ธ Applicability (High Probability Question)
๐ ALL projects must have an ESC plan:
- even if not required by local code
- even if minimal disturbance
- even for zero lot line projects
โ What is a Zero Lot Line Project?
๐ A project where:
- building footprint aligns closely with site boundary
- minimal or no exterior site area
๐ฏ Exam Insight
โNo disturbanceโ โ โNo ESC planโ
๐ ๏ธ Types of Control Measures
- Stabilization Measures (Prevent Erosion)
๐ These prevent soil from being disturbed
Examples:
- Temporary seeding โ fast-growing plants
- Permanent seeding โ long-term vegetation
- Mulching โ cover soil with materials
๐ฏ Key Idea
Stabilization = prevent erosion before it happens
- Structural Control Measures (Control Sediment)
๐ These manage sediment after erosion occurs
Examples:
๐๏ธ Earth Dikes
- divert runoff
- direct water to safe areas
๐งต Silt Fences
- filter sediment from runoff
- placed along flow paths
๐๏ธ Sediment Traps
- small pond areas
- allow sediment to settle
๐ Sediment Basins
- larger controlled ponds
- include regulated water release
๐ฏ Key Idea
Structural = manage sediment after movement begins
โ ๏ธ Important Rule (Exam Trap)
๐ ESC measures:
- are temporary
- can be removed after construction
๐ Site-Specific Approach
๐ Strategies must be based on:
- site conditions
- climate
- weather
๐ฏ Insight
What works in one region may not work in another
๐ Documentation Requirements
Projects must provide:
๐ ESC Plan Narrative
Must include:
- timing of implementation
- specific control measures used
- maintenance procedures
๐ก If Already Following EPA CGP
๐ No additional plan required
๐ฏ Exam Insight
Following CGP = automatically compliant
๐ง Where People Get Confused
โ Misconception 1:
โESC plan is optional if local code doesnโt require itโ
๐ No
๐ Required for all LEED projects
โ Misconception 2:
โESC plan is only for large sitesโ
๐ No
๐ Applies to all projects
โ Misconception 3:
โOnly erosion control mattersโ
๐ No
๐ Must address:
- erosion
- sedimentation
- dust
โ Misconception 4:
โMeasures must remain after constructionโ
๐ No
๐ They are temporary controls
Official FAQs
What are the three environmental impacts addressed in this prerequisite?
โข water pollution (sedimentation)
โข air pollution (dust)
What standard must the ESC plan follow?
OR local equivalent (whichever is stricter)
A project has minimal site disturbance and no local ESC requirements. Does it still need an ESC plan?
๐ All LEED projects must have an ESC plan
A project is already compliant with EPA CGP. Does it need a separate LEED ESC plan?
๐ Existing compliance is sufficient
Why does LEED require both stabilization and structural control measures?
โข stabilization prevents erosion
โข structural measures control sediment after erosion
๐ Both are needed for full protection
Why is ESC planning required even for zero lot line projects?
โข even small sites can generate dust and runoff
โข LEED requires proactive environmental protection
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