Sec. 86-137(b), (c), (g)

Environmental

• Buffer encroachment seaward limit50 ft

  The encroachment does not extend into the seaward 50 feet of the buffer.

• Buffer nutrient reduction40 pct

  The 100-foot wide buffer area shall be deemed to achieve a 75 percent reduction of sediments and a 40 percent reduction of nutrients.

• Buffer sediment reduction75 pct

  The 100-foot wide buffer area shall be deemed to achieve a 75 percent reduction of sediments and a 40 percent reduction of nutrients.

• Land disturbance threshold for erosion control2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  any land disturbing activity exceeding 2,500 square feet, including construction of single-family houses, septic tanks and drainfields, shall comply with the erosion and sediment control requirements of state law.

• Major WQIA threshold50,000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  A major water quality impact assessment shall be required for any proposed land disturbance, development or redevelopment which (i) exceeds 50,000 square feet of land disturbance; or (ii) disturbs any portion of the RPA.

• Minor WQIA threshold50,000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  A minor water quality impact assessment is required for proposed land disturbance, development and redevelopment under the following circumstances: Where land disturbance outside the RPA will exceed 2,500 square feet but not more than 50,000 square feet.

• Protective barrier distance from dripline5 ft

  Prior to clearing or grading, suitable protective barriers, such as safety fencing, shall be erected five feet outside of the dripline of any tree or stand of trees to be preserved.

• Reserve sewage disposal site required

  A reserve sewage disposal site with a capacity at least equal to that of the primary sewage disposal site shall be provided on each lot or parcel proposed for new construction.

• RPA buffer width100 ft

  A vegetated buffer area not less than 100 feet in width located adjacent to and landward of the components listed above, and along both sides of any water body with perennial flow.

• Septic system pump-out frequency5 years

  Systems shall be pumped out at least once every five years, unless the owner submits documentation, certified by a sewage handler permitted by the Virginia Department of Health, that the septic system has been inspected, is functioning properly, and the tank does not need to have the effluent pumped out of it.