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A. Utilities, Major. Large and/or regional public or private utility generation or treatment facilities and possibly having on-site personnel. This category includes, but is not limited to:

1. Water treatment plant.

2. Sanitary sewer and/or stormwater treatment plant.

B. Utilities, Minor. Small and/or local public or private utility distribution facilities and infrastructure with no on-site personnel. This category includes, but is not limited to:

1. On-site stormwater retention, detention, or infiltration facility.

2. Neighborhood-serving telecommunications, gas, or electric facility.

3. Water and sanitary sewer pump station or lift station.

4. Electrical substation.

5. Utility service.

C. Sustainable Energy Generation System.

1. Definition. A system that generates electricity from renewable resources such as solar energy, wind power, tidal power, geothermal energy, and biomass.

2. Standards.

a. Principal and Accessory Use Classification. The sustainable energy generation system is a principal use when it generates or has the potential to generate more electricity than needed for buildings and facilities on the site where it is located and sends or has the potential to send excess electricity off site.

Systems that only generate electricity for on-site use are accessory (see AMC 19.47.010 and 19.47.020 for accessory use and structure standards), unless the Director determines the system is a principal use based on system characteristics such as size, design, or off-site impacts.

Exception: Solar energy systems attached to a rooftop and which send excess electricity off-site may be considered an accessory use.

b. Location on Buildings. Sustainable energy generation systems may be located on building exteriors, provided they comply with setback and building height standards for the zone in which the building is located and applicable design standards such as those for rooftop mechanical equipment screening (see AMC 19.62.070(E)).

c. Nuisances. Uses, processes, equipment employed, and materials stored must not inflict upon neighboring properties fumes, noise, vibrations, odor, refuse matter, water-carried waste, or other nuisances or hazards detrimental to the health, welfare, and safety of persons occupying or visiting the zone or adjacent zones above that which is allowed by local, state, and federal standards. (Ord. 3040 § 2 (Att. A), 2019)