Sonoma County Municipal Code Ch. 7D3 Water Efficient Landscape

Footnotes:

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Editor's note— Ord. No. 6138, § I(Exh. A), adopted Dec. 8, 2015, amended Ch. 7D3 in its entirety to read as herein set out. Former Ch. 7D3, §§ 7D3-1—7D3-8, pertained to similar subject matter, and derived from Ord. No. 5872, § I, adopted Dec. 15, 2009.

Editor's note— Ord. No. 5872, § I, adopted December 15, 2009, amended the Code by adding Ch. 7D3. § III reads:

"The provisions of Section I of this ordinance are intended to supercede and replace Section 26-88-110 of the Sonoma County Code (Low Water Use Landscaping). The Director of the Permit and Resource Management Department is directed to initiate proceedings to repeal Section 26-88-110 of the Sonoma County Code. Until repealed, Section 26-88-1l0 of the Sonoma County Code shall be inoperative."

This chapter is and may be cited as the Sonoma County Water Efficient Landscape Regulations. This chapter was enacted pursuant to the Water Conservation in Landscaping Act (Government Code section 65591 et seq.), and amended to be consistent with Executive Order No. B-29-15.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

This chapter is enacted for the purpose of regulating the design, installation, and maintenance of new and rehabilitated landscapes.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

A. The provisions of this chapter shall apply to all of the following:

1. New and rehabilitated landscapes in multi-family residential, commercial, industrial, agricultural processing, and public agency projects requiring a building or grading permit or design review.

2. New and rehabilitated landscapes that are developer-installed in single-family residential projects requiring a building or grading permit or design review.

3. New and rehabilitated landscapes that are homeowner-provided and/or homeowner-hired in single-family residential projects involving new buildings or additions over four hundred (400) square feet and requiring a building or grading permit or design review, except where:

a. The landscape area is less than five thousand (5,000) square feet, and;

b. Conforms with the prescriptive compliance measure [in] Section 7D3-9.

B. The provisions of this chapter shall not apply to any of the following:

1. Registered local, state, or federal historical sites.

2. Ecological restoration projects that do not require a permanent irrigation system.

3. Mined-land reclamation projects that do not require a permanent irrigation system.

4. Plant collections, as part of botanical gardens and arboretums open to the public.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

A. A landscape plan check shall be required prior to commencing any construction on a landscape project subject to the provisions of this chapter.

B. A landscape plan check application shall be filed with the department on a county application form. Each landscape plan check application shall include all required fees and/or deposits, and all plans and specifications, and other information, materials, and submittals required by the department.

C. A landscape plan check application may only be filed by the owner or authorized agent of the owner of the subject property, or other person with the written consent of the property owner.

D. A landscape plan check application shall be approved when the director verifies that the proposed landscape project complies with the provisions of this chapter, other applicable provisions of this code, and the conditions of any applicable land use permit or other entitlement.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

No landscape plan check application shall be deemed complete, and processing shall not commence on any landscape plan check application until all required fees and/or deposits have been paid.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

Landscape projects subject to the provisions of this chapter shall be subject to inspection as required by the director to verify compliance with the approved plans. No landscape project applicant shall be deemed to have complied with the provisions of this chapter until a final inspection of the work has been completed by the director. Inspections shall not be construed to approve a violation of the provisions of this chapter or other provisions of this code. Inspections presuming to give authority to violate or cancel the provisions of this chapter or other provisions of this code shall not be valid.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

A. In order to reduce runoff and encourage healthy plant growth, a soil analysis report shall be completed by the project applicant, or his/her designee, as follows:

1. Submit soil samples to a laboratory for analysis and recommendations.

a. Soil sampling shall be conducted in accordance with laboratory protocol, including protocols regarding adequate sampling depth for the intended plants.

2. The soil analysis shall include:

a. Soil texture;

b. Infiltration rate determined by laboratory test or soil texture infiltration rate table;

c. pH;

d. Total soluble salts;

e. Sodium;

f. Percent organic matter; and

g. Recommendations.

3. In projects with multiple landscape installations (i.e. production home developments) a soil sampling rate of one (1) in seven (7) lots or approximately fifteen percent (15%) will satisfy this requirement. Large landscape projects shall sample at a rate equivalent to one (1) in seven (7) lots.

4. The soil analysis report shall be made available, in a timely manner, to the professionals preparing the landscape design plans and irrigation design plans to make any necessary adjustments to the design plans.

5. The soil analysis report shall be submitted to the department with the landscape design plan.

6. The project applicant, or his/her designee, shall submit documentation verifying implementation of soil analysis report recommendations to the department with certificate of completion.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

All landscape projects subject to the provisions of this chapter shall comply with the following standards.

A. Plants.

1. Selected plants shall not cause the estimated annual applied water use to exceed the maximum applied water allowance.

2. Plants with similar water use needs shall be grouped together in distinct hydrozones and where irrigation is required the distinct hydrozones shall be irrigated with separate valves.

a. Very low, low, and moderate water use plants can be mixed, but the entire hydrozone shall be classified as moderate water use for maximum applied water allowance calculations.

b. High water use plants shall not be mixed with very low, low, or moderate water use plants.

3. All non-turf plants shall be selected, spaced, and planted appropriately based upon their adaptability to the climatic, geologic, and topographical conditions of the project site.

4. Turf shall not be planted in the following conditions:

a. Slopes exceeding ten percent (10%).

b. Planting areas eight feet (8') wide or less.

c. Street medians, traffic islands, planter strips, or bulbouts of any size.

5. Invasive plants are prohibited.

B. Soil Amendments, Conditioning, and Mulching.

1. 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.

2. Soil amendments shall be incorporated according to recommendations of the soil report and what is appropriate for the plants selected.

3. Compost shall be incorporated into the soil to a minimum depth of eight (8) inches at a minimum rate of six (6) cubic yards per one thousand (1,000) square feet. Soils with greater than six percent (6%) organic matter in the top six (6) inches of soil are exempt from adding compost and tilling.

4. 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 groundcover, or direct seeding applications. To provide habitat for beneficial insects and other wildlife, up to five percent (5%) of the landscape area may be left without mulch. Designated insect habitat must be included in the landscape design plan as such.

C. Water Features.

1. Recirculating water systems shall be used for all water features.

2. Recycled water shall be used when available on site.

3. Surface area of water features shall be included in the high water use hydrozone area of the water budget calculation.

D. Irrigation Systems. For each landscape project subject to this chapter applicants shall meet irrigation efficiency criteria as described in the Maximum Applied Water Allowance (MAWA) and in accordance with the following:

1. A dedicated irrigation meter or sub-meter must be specified on landscapes projects more than one thousand (1,000) square feet.

2. Landscapes of five thousand (5,000) square feet or larger require a high-flow sensor that can detect high flow conditions and have the capability to shut off the irrigation system automatically.

3. Isolation valves shall be installed at the point of connection and before each valve or valve manifold.

4. Weather-based or other sensor based self-adjusting irrigation controllers utilizing non-volatile memory shall be required.

5. Rain sensors shall be installed for each irrigation controller.

6. Pressure regulation and/or booster pumps shall be installed so that all components of the irrigation system operate at the manufacturer's recommended optimal pressure.

7. Irrigation systems shall be designed to prevent runoff or overspray onto non-targeted areas.

8. Point source irrigation is required where plant height at maturity will affect the uniformity of an overhead system.

9. A twenty-four-inch setback of overhead irrigation shall be required where turf is directly adjacent to a continuous hardscape that flows into the curb and gutter.

10. Slopes greater than fifteen percent (15%) shall be irrigated with point source or other low-volume irrigation technology.

11. A single valve shall not irrigate hydrozones that mix high water use plants with moderate, low, or very low water use plants.

12. Trees shall be placed on separate valves except when planted in turf areas.

13. Sprinkler heads, rotors, and other emission devices on one (1) valve shall have matched precipitation rates.

14. Head to head coverage shall be required unless otherwise directed by the manufacturer's specifications.

15. Swing joints or other riser protection components shall be required on all risers.

16. Check valves shall be installed to prevent low-head drainage.

17. Master shut-off valves are required on all projects of five thousand (5,000) square feet or larger except landscapes that make use of technologies that allow for the individual control of sprinklers that are individually pressurized in a system equipped with low pressure shut down features.

18. Relevant information from the soil analysis report, such as soil type and, shall be utilized when designing irrigation systems.

19. The design of the irrigation system shall conform to the hydrozones of the landscape design plan.

20. All irrigation emission devices must meet the requirements set in the American National Standards Institute (ANSI) standard, American Society of Agricultural and Biological Engineers'/International Code Council's (ASABE/ICC) 802-2014 "Landscape Irrigation Sprinkler and Emitter Standard", 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.

21. Up to twenty-five percent (25%) of the total landscaped area will be treated as one (1) water use classification lower (but not less than "low"), if:

a. The irrigation need will be entirely met by onsite graywater or captured rainwater, and;

b. The area is grouped into hydrozones that have only graywater or rainwater irrigation.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

All landscape projects subject to the provisions of this chapter shall submit plans in compliance with Section 7D3-7, water efficient landscape standards, and the following:

A. Landscape Design Plan.

1. Delineate and label each hydrozone by number, letter, or other method;

2. Identify each hydrozone as very low, low, moderate, high water, or mixed water use;

3. Identify new and existing trees, shrubs, groundcovers, turf, and any other planting areas;

4. Identify plants by botanical name and common name;

5. Identify plant sizes and quantities;

6. Identify recreational areas;

7. Identify areas permanently and solely dedicated to edible plants;

8. Identify areas irrigated with recycled water;

9. Identify type of mulch and application depth;

10. Identify soil amendments, type, and quantity;

11. Identify type and surface area of pools, fountains and water features;

12. Identify property lines, new and existing building footprints, streets, driveways, sidewalks and other hardscape features (pervious and non-pervious);

13. Identify location, installation details, and size of any storm water best management practices, including rainwater harvesting or catchment technologies that will provide storm water retention, infiltration, and/or treatment. Project applicants shall refer to the department or North Coast Regional Water Quality Control Board for information and approval requirements;

14. Identify any applicable graywater discharge piping, system components and area(s) of distribution;

15. Contain the following statement: "I have complied with the criteria of the ordinance and applied them for the efficient use of water in the landscape design plan"; and

16. Bear the signature of a licensed landscape architect, licensed landscape contractor, or any other person authorized to design a landscape. (See Sections 5500.1, 5615, 5641, 5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, 7027.5 of the Business and Professions Code, Section 832.27 of Title 16 of the California Code of Regulations, and Section 6721 of the Food and Agriculture Code.)

B. Irrigation Design Plan.

1. Identify location and size of separate water meters for landscape;

2. Identify location and size of irrigation system point of connection;

3. Identify location, type and size of all components of the irrigation system, including controllers, main and lateral lines, master valves, valves, sprinkler heads and other application devices, moisture sensing devices, rain sensors, check valves, quick couplers, flow sensors, pressure regulators, and backflow prevention devices;

4. Identify static water pressure at the point of connection to the public water supply if any;

5. Identify flow rate (gallons per minute), application rate (inches per hour), and design operating pressure of the irrigation system (pressure per square inch) for each station;

6. Identify recycled water irrigation systems;

7. Include the Hydrozone Table;

8. Contain the following statement: "I have complied with the criteria of the ordinance and applied them accordingly for the efficient use of water in the irrigation design plan"; and

9. Bear the signature of a licensed landscape architect, certified irrigation designer, licensed landscape contractor, or any other person authorized to design an irrigation system. (See Sections 185500.1, 5615, 5641, 5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, 7027.5 of the Business and Professions Code, Section 832.27 of Title 16 of the California Code of Regulations, and Section 6721 of the Food and Agricultural Code.)

C. Grading Design Plan. Where slopes exceed ten percent (10%), a grading plan drawn at the same scale as the planting plan that accurately and clearly identifies finished grades, drainage patterns, pad elevations, spot elevations and storm water retention improvements shall be submitted with the landscape design plan and irrigation design plan. The grading design plan shall contain the following statement: "I have complied with the criteria of the ordinance and applied them accordingly for the efficient use of water in the grading design plan" and shall bear the signature of a licensed professional as authorized by law."

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

As used in this chapter, the following terms and phrases shall have the meanings ascribed to them in this section, unless the context in which they are used clearly requires otherwise. The definition of a term or phrase applies to any of that term's or phrase's variants.

"Backflow prevention device" means an approved device installed to prevent backflow or back-siphonage into the potable water system.

"Building permit" means any building permit under Chapter 7 of this code.

"Booster pump" means a pump used where the normal water system pressure is low and needs to be increased.

"California Invasive Plant Inventory" means the California Invasive Plant Inventory maintained by the California Invasive Plant Council.

"Check valve" means a valve located under a sprinkler head, or other location in the irrigation system, to hold water in the system to prevent drainage from sprinkler heads when the sprinkler is off.

"Compost" means the safe and stable product of controlled biologic decomposition of organic materials that is beneficial to plant growth.

"Department" means the permit and resource management department.

"Design review" means any design review under Chapter 26 or 26C of this code.

"Director" means the director of the permit and resource management department or his or her authorized representative.

"Distribution uniformity" means the measure of the uniformity of irrigation water over a defined area.

"Ecological restoration project" means a project where the site is intentionally altered to establish a defined, indigenous, historic ecosystem.

"Effective precipitation" means the portion of total precipitation which becomes available for plant growth and that is used by the plants.

"Evapotranspiration adjustment factor (ETAF)" means, a factor of 0.55 for residential areas and .45 for non-residential areas, that, when applied to reference evapotranspiration, adjusts for plant factors and irrigation efficiency, two (2) major influences upon the amount of water that needs to be applied to the landscape. The ETAF for a new and existing (non-rehabilitated) special landscape areas shall not exceed 1.0.

"Evapotranspiration rate (ET)" means the quantity of water evaporated from adjacent soil and other surfaces and transpired by plants during a specific specified time.

"Flow rate" means the rate at which water flows through pipes, valves, and emission devices, measured in gallons per minute, gallons per hour, or cubic feet per second.

"Friable" means a soil condition that is easily crumbled or loosely compacted down to a minimum depth per planting material requirements, whereby the root structure of newly planted material will be allowed to spread unimpeded.

"Grading permit" means any grading permit under Chapter 11 of this code.

"Graywater" means untreated wastewater that has not been contaminated by any toilet discharge, has not been affected by infectious, contaminated, or unhealthy bodily wastes, and does not present a threat from contamination by unhealthful processing, manufacturing, or operating wastes. "Graywater" includes, but is not limited to, wastewater from bathtubs, showers, bathroom washbasins, clothes washing machines, and laundry tubs, but does not include wastewater from kitchen sinks or dishwashers. Health and Safety Code Section 17922.12.

"Hardscape" means any durable material (pervious and non-pervious).

"Head to head coverage" means full coverage from one (1) sprinkler head to the next.

"High-flow sensor" means a device for sensing the rate of fluid flow.

"High water use plant" mean any plant categorized as high water need by the Water Use Classification of Landscape Species Guide. Plant factors may also be obtained from horticultural researchers from academic institutions or nursery industry professional associations as approved by the California Department of Water Resources (DWR).

"Hydrozone" means a portion of the landscape area having plants with similar water needs that are served by a valve or set of valves with the same schedule.

"Infiltration rate" means the rate of water entry into the soil expressed as a depth of water per unit of time (e.g., inches per hour).

"Invasive plant" means any plant listed on the California Invasive Plant Inventory.

"Irrigation efficiency" means the measurement of the amount of water beneficially used divided by the amount of water applied. Irrigation efficiency is derived from measurements and estimates of irrigation system characteristics and management practices. The irrigation efficiency for purposes of this chapter are .75 for overhead spray devices and .81 for drip systems.

"Irrigation meter" means a separate meter that measures the amount of water used for items such as lawns, washing exterior surfaces, washing vehicles, or filling pools.

"Isolation valve" means a valve used to isolate a portion of the piping system.

"Landscape area" means the dedicated landscape area on a property. Water features are included in the calculation of the landscape area. Areas dedicated to agricultural cultivation are not included. The landscape area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, gravel or stone walks, other pervious or non-pervious hardscapes, and other nonirrigated areas designated for non-development (e.g., open spaces and existing native vegetation).

"Land use permit" means any ministerial or discretionary permit or approval granted by the county pursuant to Chapter 26 or 26C of this code to use a specific site for a particular purpose.

"Lateral line" means non-pressurized pipe that is located downstream of an irrigation valve (Class 200 or equivalent is not acceptable).

"Low-head drainage" means water that flows out of the system after the valve turns off due to elevation changes within the system.

"Low water use plant" means any plant categorized as low water need by the Water Use Classification of Landscape Species Guide.

"Master valve" means automatic valve installed at the irrigation supply point which controls water flow into the irrigation system. When this valve is closed water will not be supplied to the irrigation system.

"Maximum applied water allowance" means the upper limit of annual applied water for the established landscape area. It is based upon the area's reference evapotranspiration, the ET adjustment factor, and the size of the landscape area. The estimated total water use shall not exceed the maximum applied water allowance

"Mined-land reclamation project" means any surface mining operation with a reclamation plan approved in accordance with Chapter 26A of this code.

"Moderate water use plant" means any plant categorized as moderate water need by the Water Use Classification of Landscape Species Guide. Plant factors may also be obtained from horticultural researchers from academic institutions or nursery industry professional associations as approved by the California Department of Water Resources (DWR).

"Mulch" means any organic material such as leaves, bark, straw, compost or inorganic mineral materials such as rocks, gravel, or decomposed granite left loose and applied to the soil surface for the beneficial purposes of reducing evaporation, suppressing weeds, moderating soil temperature and preventing soil erosion.

"New landscape" means any new landscaping project.

"Non-pervious" means any surface or material that does not allow the passage of water through the material and into the underlying soil.

"Overhead irrigation" means systems that deliver water through the air (e.g., pop-ups, impulse sprinklers, spray heads, rotors, micro-sprays, etc.).

"Overspray" means the irrigation water that is delivered beyond the landscape area, wetting pavements, walks, structures, or other non-landscaped areas.

"Pervious" means any surface or material that allows the passage of water through the material and into the underlying soil.

"Plant factor" means a factor that, when multiplied by reference evapotranspiration, estimates the amount of water used by needed plants. Plant factors cited in this chapter are derived from the department of water publication "Water Use Classification of Landscape Species." Plant factors may also be obtained from horticultural researchers from academic institutions or nursery industry professional associations as approved by the California Department of Water Resources (DWR).

"Point of connection" means the point at which an irrigation system taps into the main water supply line.

"Point source irrigation" means any non-spray low volume irrigation system utilizing emission devices with a flow rate measured in gallons per hour. Low volume irrigation systems are specifically designed to apply small volumes of water slowly at or near the root zone of plants.

"Precipitation rate" means the rate of application of water measured in inches per hour.

"Pressure regulation" means a valve that automatically reduces the pressure in a pipe.

"Project applicant" means the individual or entity submitting a landscape documentation package, to request a permit, plan check or design review from the department. A project applicant may be the property owner or his or her designee.

"Rain sensor" means a system component that automatically shuts off and suspends the irrigation system when it rains.

"Recreational area" means areas, excluding private single family residential areas designated for active play, recreation or public assembly in parks, sports fields, school yards, picnic grounds, amphitheaters, or golf course tees, fairways, roughs, surrounds and greens.

"Recycled water" means non-potable water that meets California Department of Public Health statewide uniform criteria for disinfected tertiary recycled water. Recycled water is also known as reclaimed water.

"Reference evapotranspiration (ETo)" means a standard measurement of environmental parameters that affect the water use of plants, and is an estimate of the evapotranspiration of a large field of four- to seven-inch tall, cool-season grass that is properly watered.

"Rehabilitated landscape" means any re-landscaping project.

"Runoff" means water that is not absorbed by the soil or landscape to which it is applied and flows from the landscape area.

"Soils analysis report" means the analysis of a soil sample to determine nutrient content, composition, and other characteristics, including contaminants.

"Special landscape area" means an area of the landscape dedicated solely to edible plants, recreation areas, areas irrigated with recycled water, water features using recycled water, and areas dedicated active play such as parks, sports fields, golf courses, where turf provides the playing surface.

"Sprinkler head" or "spray head" means a device that delivers water through a nozzle.

"Station" means an area served by one (1) valve or by a set of valves that operate simultaneously.

"Submeter" means a separate meter that is located on the private side of the water system and is plumbed to measure all water that flows only through the irrigation system. This meter is to be used by the owner to monitor irrigation water use.

"Swing joint" means an irrigation component that provides a flexible, leak-free connection between the emission device and lateral pipeline to allow movement in any direction and to prevent equipment damage.

"Valve" means a device used to control the flow of water in the irrigation system.

"Valve manifold" means a one-piece manifold for use in a sprinkler valve assembly that includes an intake pipe having a water inlet and a plurality of ports adapted for fluid connection to inlets.

"Very low-water-use plants" means plants recognized as very low-water-use by the water use classification of landscape species document (http://ucanr.edu/sites/wucols/), as it currently exists or may be amended in the future. Plant factors may also be obtained from horticultural researchers from academic institutions or nursery industry professional associations as approved by the California Department of Water Resources (DWR).

"Water feature" means a design element where open water performs an aesthetic or recreational function. Water features include ponds, lakes, waterfalls, fountains, artificial streams, spas, and swimming pools (where water is artificially supplied). The surface area of water features is included in the high water use hydrozone of the landscape area. Constructed wetlands used for on-site wastewater treatment or storm water best management practices that are not irrigated and used solely for water treatment or storm water retention are not water features and, therefore, are not subject to the water budget calculation.

"Weather-based self-adjusting irrigation controller" means a system component that uses local weather and landscape conditions to automatically adjust irrigation schedules to actual conditions on the site or historical weather data.

"Water Use Classification of Landscape Species Guide (WUCOLS)" means the Water Use Classification of Landscape Species Guide published by the University of California Cooperative Extension, the Department of Water Resources, and the Bureau of Reclamation, as it currently exists or may be amended in the future.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)

This section contains prescriptive requirements which may be used as a compliance option to this chapter for qualifying homeowner provided and homeowner hired landscape projects as described in Section 7D3-3. In order to use the prescriptive compliance option all qualifying landscape projects must comply with the following standards. At the time of final inspection the applicant must provide the property owner with a certificate of completion, certificate of installation, irrigation schedule and schedule of irrigation and landscape maintenance.

A. Submit a landscape documentation package including:

1. Date.

2. Project location.

3. Project applicant.

4. Total landscape area and total turf area, in square feet.

5. Project type (e.g., new, rehabilitate, homeowner installed, homeowner hired).

6. Water supply types (e.g., well, potable, recycled, graywater) identify the water purveyor and square feet of landscape watered by graywater, harvested rainwater, or recycled water.

7. Contact information for project applicant and property owner.

8. Applicant signature and date with the statement, "I agree to comply with the requirements of the prescriptive compliance option for chapter 7D3 of the Sonoma County Code".

B. Submit soil improvement documentation;

1. Incorporate compost at a rate of at least four (4) cubic yards per one thousand (1,000) square feet to a depth of six inches (6") into landscape area, indicate total compost estimated and if available, compost type and supplier or;

2. Demonstrate compliance with soil report recommendations.

C. Plant material shall comply with all of the following;

1. Install climate adapted plants that require occasional, little or no summer water (average 0.3 WUCOLS plant factor) for seventy-five percent (75%) of the plant area excluding edibles and areas using recycled water, harvested rainwater, or graywater;

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

D. Turf shall comply with all of the following;

1. Turf shall not exceed twenty-five percent (25%) of the landscape area to a maximum of six hundred (600) square feet.

2. Turf shall not be planted on turf areas which exceed a slope of one foot (1') vertical elevation change for every four feet (4') of horizontal length;

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

E. Irrigation systems shall comply with the following;

1. Automatic irrigation controllers are required and must use evapotranspiration or soil moisture sensor data and utilize a rain sensor.

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

3. Pressure regulators shall be installed on the irrigation system to ensure the dynamic pressure of the system is within the manufacturers recommended pressure range.

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

5. All irrigation emission devices must 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 must document a distribution uniformity low quarter of 0.65 or higher using the protocol defined in ASABE/ICC 802-2914.

6. Areas less than ten feet (10') in width in any direction shall be irrigated by subsurface irrigation or other technology that creates no overspray or runoff.

(Ord. No. 6138, § I(Exh. A), 12-8-2015)