The Contributing Zone Plan (CZP) is required for any construction project or regulated activity proposed in the contributing zone of the Edwards Aquifer having the potential for polluting surface streams which recharge the aquifer.
Similar with the Water Pollution Abatement Plan (WPAP) and Sewage Collection System (SCS), the forms for a complete CZP application can be obtain online through Texas Commission on Environmental Quality (TCEQ). Along with the required fees, additional information must be attached, such as maps, site plans, construction notes and details, calculations for the removal of suspended solids, and the sizing for permanent best management practices. For all regulated activities a technical report must accompany the application for CZP approval. The CZP must also include information on best management practices that will be used during construction.
Some elements of the storm water pollution prevention plan (SWPPP) developed under the Texas Pollutant Discharge Elimination System (TPDES) general permits for storm water discharges may be submitted to fulfill some requirements of the plan.