Sec. 3-1401, 3-1402, 3-1403, 3-1404, 3-1405

Environmental

• Slope threshold for RMA feature15 pct

  Slopes in excess of 15 percent

• Land disturbance threshold for minor WQIA5,000 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 pertains only to land disturbance, development or redevelopment activity within a CBPA which causes no more than 5,000 square feet of land disturbance

• Land disturbance threshold for plan of development2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Any development or redevelopment exceeding 2,500 square feet of land disturbance in the CBPA shall be accomplished through a plan of development process

• Minimum replacement tree caliper2.5 in

  Replacement trees shall be a minimum two and one-half inches caliper measured six inches above the ground at the time of planting.

• Minimum tree DBH to show on plan2 in

  All existing trees on the site two inches or greater in diameter at breast height (DBH) shall be shown on the plan

• Tree replacement ratio2 ratio

  replacement of existing trees and other vegetation will be achieved at a ratio of two planted trees to one removed.

• RPA buffer nutrient reduction40 pct

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

• RPA buffer sediment reduction75 pct

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

• RPA buffer width100 ft

  a buffer area not less than 100 feet in width located adjacent to and landward of the components listed in subsections A.1. through 4. above, and along both sides of any water body with perennial flow.

• RPA buffer encroachment landward limit for agriculturalAgricultureRaising crops or livestock, generally including the structures that serve them. activities50 ft

  Agricultural activities may encroach into the landward 50 feet of the 100-foot wide buffer area when at least one agricultural best management practice...

• RPA buffer encroachment landward limit for agriculturalAgricultureRaising crops or livestock, generally including the structures that serve them. activities with more BMPs75 ft

  Agricultural activities may encroach within the landward 75 feet of the 100-foot wide buffer area when agricultural best management practices which address erosion control, nutrient management, and pest chemical control, are being implemented on the adjacent land.

• RPA buffer encroachment seaward limit50 ft

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

• Septic pump-out frequency5 years

  All on-site sewage disposal systems not requiring VPDES permit shall be pumped out at least once every five years.

• Stormwater plan exemption imperviousImpervious coverageThe share of a lot covered by anything water cannot soak through — roofs, drives, patios. cover16 pct

  This submittal is not required for individual one- and two-family homes located on lots one acre or greater in size if the impervious cover is 16 percent or less of the total site area.

• Stormwater plan exemption lot size1 acresacre43,560 square feet — about the size of an American football field without the end zones.

  This submittal is not required for individual one- and two-family homes located on lots one acre or greater in size if the impervious cover is 16 percent or less of the total site area.