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(a) Roof- and building-mounted small wind energy conversion systems are permitted accessory structures within all zoning districts subject to compliance with the following regulations:
(.1) Turbines must be set back at least 20 ft. from the front building line and, on corner lots, at least 15 ft. from the street side building line.
(.2) Turbines and associated equipment are limited to a height of no more than 15 ft. above the roof or top of the parapet, whichever is greater.
(.3) Small wind energy conversion systems must comply with all noise limitations of The Philadelphia Code.
(.4) Small wind energy conversion systems must be safely and securely attached to the rooftop in compliance with the building code.
(.5) When storage batteries are included as part of the wind energy conversion system, they must be placed in a secure container or enclosure meeting the requirements of the building code.
(.6) If a wind energy conversion system ceases to perform its originally intended function for more than 12 consecutive months, the property owner shall remove the system within 90 days after the end of the 12-month period.
(b) Ground-mounted wind energy structures must be located in side or rear yards and comply with the following:
(.1) In Residential districts, ground-mounted wind energy structures are permitted to encroach into required side yards that are at least eight ft. wide and into required rear yards, but not within two ft. of any side or rear lot line.
(.2) In Commercial, Industrial, and Special Purpose districts, ground-mounted wind energy structures are permitted to encroach into required side and rear yards, but not within two ft. of any side or rear lot line.