21.56.030 and 21.56.040

Other

• Compost incorporation rate4 cubic yardscubic yard (cy)A unit of earth volume used in grading limits — roughly one dump-truck scoop. per 1000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Incorporate compost at a rate of at least four cubic yards per one thousand square feet to a depth of six inches into the landscape area

• Evapotranspiration adjustment factor for nonresidential0.45 ratio

  0.45 for nonresidential areas

• Evapotranspiration adjustment factor for residential0.55 ratio

  ETAF of 0.55 for residential areas

• Minimum irrigation efficiency for drip systems81 pct

  and eighty-one percent for drip systems.

• Minimum irrigation efficiency for overhead spray75 pct

  Irrigation systems shall be designed and constructed to achieve a minimum efficiency of seventy-five percent for overhead spray devices

• Minimum mulch depth3 inches

  Apply a minimum three-inch layer of mulch on all exposed soil surface of planting areas.

• Overhead spray irrigation setbackSetbackThe distance a building must be held back from a lot line. from non-permeable surfaces24 inches

  Prohibit overhead spray irrigation within twenty-four inches of non-permeable surfaces

• Turf limit for commercial and industrial projects0 pct

  Water conserving plant species irrigated with a drip irrigation system shall be used for one hundred percent of the development's landscaped area, excluding edibles and areas using recycled water.

• Turf limit for model home back and side yards25 pct

  and shall be limited to twenty-five percent of the landscaped area in back and side yards.

• Turf limit for model home front yards0 pct

  Turf grass shall be prohibited in the front yards of model homes

• Turf limit for multi-familyMultifamily dwellingA building of four or more dwelling units. Where zoning is most restrictive. residential projects20 pct

  Turf grass shall be limited to twenty percent of the landscaped area.

• Turf limit for single family residences25 pct

  Turf grass installed with spray irrigation shall be limited in new and rehabilitated single family residential front yards, street side yards and back yards, to twenty-five percent of the landscaped area.

• Turf prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance. on slopes greater than 20% adjacent to hardscape20 pct

  Prohibit turf on slopes greater than twenty percent where the toe of the slope is adjacent to an impermeable hardscape.