Chapter 14.27.070
Prescriptive Compliance Option

Sections:

14.27.070.010    Prescriptive Compliance Option.

14.27.070.010 Prescriptive Compliance Option.

A. This chapter contains prescriptive requirements which may be used as a compliance option to the Model Water Efficient Landscape Ordinance.

B. Compliance with the following items is mandatory and shall be documented on a landscape plan in order to use the prescriptive compliance option:

1. Submit a landscape documentation package which includes the following elements:

a. Date;

b. Project applicant;

c. Project address (if available, parcel and/or lot number(s));

d. Total landscape area (square feet), including a breakdown of turf and plant material;

e. Project type (e.g., new, rehabilitated, public, private, cemetery, homeowner-installed);

f. Water supply type (e.g., potable, recycled, well) and identify the local retail water purveyor if the applicant is not served by a private well;

g. Contact information for the project applicant and property owner; and

h. Applicant signature and date.

2. Incorporate compost at a rate of at least four cubic yards per 1,000 square feet to a depth of six inches into landscape area (unless contraindicated by a soil test);

3. Plant material shall comply with all of the following:

a. For residential areas, install climate adapted plants that require occasional, little or no summer water (average WUCOLS plant factor 0.3) for 75 percent of the plant area excluding edibles and areas using recycled water. For nonresidential areas, install climate adapted plants that require occasional, little or no summer water (average WUCOLS plant factor 0.3) for 100 percent of the plant area excluding edibles and areas using recycled water;

b. 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.

4. Turf shall comply with all of the following:

a. Turf shall not exceed 25 percent of the landscape area in residential areas, and there shall be no turf in nonresidential areas;

b. Turf shall not be planted on sloped areas which exceed 25 percent; and

c. Turf is prohibited in parkways less than 10 feet wide, unless the parkway is adjacent to a parking strip and used to enter and exit vehicles. Any turf in parkways shall be irrigated by subsurface irrigation or by other technology that creates no overspray or runoff.

5. Irrigation systems shall comply with the following:

a. Automatic irrigation controllers are required and shall use evapotranspiration or soil moisture sensor data.

b. Irrigation controllers shall be of a type which does not lose programming data in the event the primary power source is interrupted.

c. Pressure regulators shall be installed on the irrigation system to ensure the dynamic pressure of the system is within the manufacturer’s recommended pressure range.

d. Manual shut-off valves (such as a gate valve, ball valve, or butterfly valve) shall be installed as close as possible to the point of connection of the water supply.

e. All irrigation emission devices shall meet the requirements set in the ANSI standard, ASABE/ICC 802-2014, “Landscape Irrigation Sprinkler and Emitter Standard.” All sprinkler heads installed in the landscape shall document a distribution uniformity low quarter of 0.65 or higher using the protocol defined in ASABE/ICC 802-2014.

C. At the time of final inspection, the permit applicant shall provide the owner of the property with a certificate of completion, certificate of installation, irrigation schedule and a schedule of landscape and irrigation maintenance.

(Ord. 1972, Repealed and Replaced, 02/22/2022)