Description: Impervious surfaces are covered by impenetrable materials such as asphalt, concrete, brick, and stone.  These materials seal surfaces, repel water, and prevent precipitation from infiltrating soils.  Removal of these impervious materials, when combined with permeable pavement or vegetation establishment, is intended to reduce stormwater runoff rate and volume, as well as associated pollutants transported from the site by stormwater runoff.

CCAP Impervious Surface Conversion Policy
Requirements for all CCAP Practices

Maintenance Period: 5 years single-family home, 10 years all other properties.

Additional Spot Check Requirements: None

BMP Units: Square Feet
Cost Information: Components are cost shared at 75% of average cost. See CCAP Average Cost List for details. 

CS2 Project Description examples

Expected Results: 

• Total Nitrogen Removed
• Total Phosphorus Removed
  • Use CCAP BMP Water Quality Benefits Spreadsheet
  • CCAP Water Quality Benefits Tool User Guide
  • Water Quality Benefits Tool Overview

Reference Materials: 
NC-CCAP 11 Signature Page
Map with BMP location, fields, and roads

JAA: None

Supporting NRCS Standards:
NRCS - 612 - Tree/Shrub Establishment
NRCS - 342 - Critical Area Planting

Design Standard:
CCAP Design Manual: Impervious Removal

Planning Tools:
CCAP Vegetative Guidelines