99.11.03

Other

• Automatic irrigation controller required

  Automatic irrigation controllers utilizing either evapotranspiration or soil moisture sensor data utilizing non-volatile memory shall be required for irrigation scheduling in all irrigation systems.

• Check valves required

  Check Valves/Anti-Drain Valves: Required on all sprinkler heads where low point drainage could occur.

• Compost incorporation depth6 in

  Installation of compost at a rate of a minimum of four cubic yards per 1,000 square feet of permeable area shall be incorporated to a depth of six inches into the soil.

• Compost application 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.

  Installation of compost at a rate of a minimum of four cubic yards per 1,000 square feet of permeable area shall be incorporated to a depth of six inches into the soil.

• Minimum distribution uniformity for sprinkler heads0.65 factor

  All sprinkler heads installed in the landscape must document a distribution uniformity low quarter of 0.65 or higher using the protocol defined in ASABE/ICC 802-2014.

• ETAF for existing non-rehabilitated landscapes0.8 factor

  The ETAF for existing non-rehabilitated landscapes is 0.8.

• Evapotranspiration adjustment factor for non-residential areas0.45 factor

  The ETAF for a landscape project is based on the plant factors and irrigation methods selected. The Maximum Applied Water Allowance is calculated based on the maximum ETAF allowed (0.55 for residential areas and 0.45 for non-residential areas).

• Evapotranspiration adjustment factor for residential areas0.55 factor

  The ETAF for a landscape project is based on the plant factors and irrigation methods selected. The Maximum Applied Water Allowance is calculated based on the maximum ETAF allowed (0.55 for residential areas and 0.45 for non-residential areas).

• Maximum ETAF for Special Landscape Areas1 factor

  ETAF for new and existing (non-rehabilitated) Special Landscape Areas shall not exceed 1.0.

• Reference evapotranspiration value92.1 inches/year

  In calculating the Maximum Applied Water Allowance and Estimated Total Water Use, a project applicant shall use the ETo value of 92.1, found in the Reference Evapotranspiration Table 99.11.04(b)-1.

• Defensible space in fire-prone areas

  A landscape design plan for projects in fire-prone areas shall address fire safety and prevention. A defensible space or zone around a building or structure is required per California Public Resources Code section 4291(a) and (b). Avoid fire-prone plant materials and highly flammable mulches.

• High water use plants prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance. in street medians

  High water use plants, characterized by a plant factor of 0.7 to 1.0, are prohibited in street medians.

• Hydrozone labeling required

  Delineate and label each hydrozone by number, letter, or other method; Identify each hydrozone as low, moderate, high water, or mixed water use.

• Invasive plant species discouraged

  The use of invasive plant species, such as those listed by the California Invasive Plant Council, is strongly discouraged.

• Irrigation design plan signature required

  The signature of a licensed landscape architect, certified irrigation designer, licensed landscape contractor, or any other person authorized to design an irrigation system.

• Irrigation efficiency for drip systems0.81 factor

  The irrigation efficiencies for purposes of this ordinance are 0.75 for overhead spray devices and 0.81 for drip systems.

• Irrigation efficiency for overhead spray devices0.75 factor

  The irrigation efficiencies for purposes of this ordinance are 0.75 for overhead spray devices and 0.81 for drip systems.

• Landscape design plan signature required

  Bear the signatures of a licensed landscape architect, licensed landscape contractor, or any other person authorized to design a landscape.

• Landscape water meter required for non-residential irrigated landscapes1,000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Landscape water meters, defined as either a dedicated water service meter or private submeter, shall be installed for all non-residential irrigated landscapes of 1,000 sq. ft. but not more than 5,000 sq. ft. (the level at which California Water Code section 535 applies) and residential irrigated landscapes of 5,000 sq. ft. or greater.

• Landscape water meter required for residential irrigated landscapes5,000 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Landscape water meters, defined as either a dedicated water service meter or private submeter, shall be installed for all non-residential irrigated landscapes of 1,000 sq. ft. but not more than 5,000 sq. ft. (the level at which California Water Code section 535 applies) and residential irrigated landscapes of 5,000 sq. ft. or greater.

• Low volume irrigation in mulched areas required

  Low Volume Irrigation in Mulched Areas: Required to maximize water infiltration into root zones.

• Master shut-off valve required

  Master Shut-Off Valves: Required on all projects, except landscapes using technologies allowing individual control of sprinklers that are individually pressurized in a system with low pressure shut down features.

• Matched precipitation rates

  Sprinkler heads and emission devices shall have matched precipitation rates unless manufacturer recommends otherwise.

• Minimum landscape area for new development requiring compliance500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  New development projects with an aggregate landscape area equal to or greater than 500 square feet requiring a building or landscape permit, plan check or design review.

• Minimum landscape area for rehabilitated projects2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Rehabilitated landscape projects with an aggregate landscape area equal to or greater than 2,500 square feet requiring a building permit, plan check, or design review.

• Minimum mulch depth3 in

  A minimum three-inch layer of mulch shall be applied on all exposed soil surfaces of planting areas except in turf areas, creeping or rooting groundcovers, or direct seeding applications where mulch is contraindicated.

• Plant factor ranges

  The plant factor used shall be from WUCOLS or from horticultural researchers with academic institutions or professional associations as approved by the California Department of Water Resources (DWR). The plant factor ranges from 0 to 0.1 for very low water using plants, 0.1 to 0.3 for low water use plants, from 0.4 to 0.6 for moderate water use plants, and from 0.7 to 1.0 for high water use plants.

• Pool and spa covers recommended

  Pool and spa covers are highly recommended.

• Recirculating water systems required

  Recirculating water systems shall be used for water features.

• Recycled water for decorative water features

  Where available, recycled water shall be used as a source for decorative water features.

• Runoff prevention

  Irrigation systems shall be designed to prevent runoff, low head drainage, overspray, or similar conditions where water flows onto non-targeted areas, hardscapes, roadways, or structures.

• Rain, freeze, wind sensors required

  Sensors (rain, freeze, wind, etc.), either integral or auxiliary, that suspend or alter irrigation operation during unfavorable weather conditions shall be required on all irrigation systems, as appropriate for local climatic conditions.

• Compacted soils transformed to friable condition

  Prior to the planting of any materials, compacted soils shall be transformed to a friable condition. On engineered slopes, only amended planting holes need meet this requirement.

• Maximum landscape area for streamlined method2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Projects with an aggregate landscape area less than 2,500 square feet may comply with the requirements of either the streamlined landscape method or the water budget landscape method.

• Swing joints required on risers

  Swing Joints/Riser Protection: Required on all risers subject to damage adjacent to hardscapes or high traffic turf areas.

• Turf prohibitedProhibitedNot allowed in the district at all, short of rezoning or a variance. in streamlined method

  Installation of turf is prohibited.

• Maximum slope for turf adjacent to impermeable hardscape25 pct

  Turf is not allowed on slopes greater than 25% where the toe of the slope is adjacent to an impermeable hardscape and where 25% means 1 foot of vertical elevation change for every 4 feet of horizontal length.

• Minimum landscape area for water budget method2,500 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.

  Projects with an aggregate landscape area in excess of 2,500 square feet shall comply with the water budget landscape method.

• Water features included in high-water use hydrozone

  All water features shall be included in the high-water use hydrozone, and temporarily irrigated areas shall be included in the low water use hydrozone.