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(a) Large Development Projects shall be constructed, operated, and maintained in compliance with the following:
(1) All toilet and urinal flushing and irrigation demands shall be met through the collection and reuse of available onsite Rainwater, Graywater, and Foundation Drainage, to the extent required by application of the Water Budget Documentation developed for each Development Project.
(2) A Large Development Project Applicant shall use the Water Budget Calculator, as provided by the General Manager's rules, to prepare a Water Budget assessing the amount of Rainwater, Graywater, and Foundation Drainage produced on site, and the planned toilet and urinal flushing and irrigation demands.
(3) If, based on the Water Budget Documentation, the available supply from onsite sources exceeds the demands for toilet and urinal flushing and irrigation, 100% of those demands shall be met by using the available onsite sources. If, based on the Water Budget Documentation, the available supply from onsite sources is less than the demands for toilet and urinal flushing and irrigation, 100% of the available onsite supply shall be used to meet the demands for toilet and urinal flushing and irrigation. Available Blackwater or Stormwater supplies may be used instead of, or in addition to Rainwater, Graywater, and Foundation Drainage to meet the available onsite supply requirements calculated in accordance with the Water Budget Documentation requirements of this section 12C.4(a).
(b) Small Development Project Applicants shall use the Water Budget Calculator, as provided by the General Manager's rules, to prepare a Water Budget assessing the amount of Rainwater, Graywater and Foundation Drainage produced on site, and the planned toilet and urinal flushing and irrigation demands.
(c) Additional Requirements for District Systems. All District Systems shall conform to the following requirements, subject to the General Manager’s determination, in his or her sole discretion, that an exception to any of such requirements will fulfill the purposes and objectives of this Article 12C.
(1) In addition to preparation of the Water Budget, Development Project Applicants for District Systems shall submit implementation plans to the General Manager for review and approval, in accordance with guidelines and rules established by the General Manager.
(2) District Systems shall be operated by a single Permittee having sole control of operations of all of its facilities, including but not limited to treatment and distribution facilities. District Systems shall be constructed in accordance with all applicable City utility standards and specifications.
(3) District Systems and Development Projects shall not provide Non-potable Water to water users or for purposes located outside the boundaries of the District or approved Development Project, except when the water users or other purposes are located on property contiguous to, or across a public right of way from the boundaries of the District or approved Development Project, and the total amount of Nonpotable Water produced by the Alternate Water Source System will not exceed 125% of the District System’s or approved Development Project’s Non-potable Water demands for toilet and urinal flushing and irrigation, as determined by the approved Water Budget Documentation.
(4) For District Systems, the ongoing operation and maintenance responsibilities of the Responsible Party shall be held by the owner of the common areas within the District Development Project, and may be transferred to a homeowners association or similar entity that maintains the common areas within the District Development Project.
Where a District System complies with the requirements in subsections 1 through 4 of this subsection 12C.4(c), including any exceptions approved by the General Manager, individual Development Projects with the District shall not be required to demonstrate compliance as long as the individual Development Projects are provided service by the approved District System.
(d) The General Manager may approve alternative District Systems that will achieve compliance with the purposes and objectives of this Article 12C, in accordance with guidelines and rules established by the General Manager. Alternative District Systems may include, but are not limited to, water purchase agreements.
(e) City departments shall not issue an encroachment permit, a site permit, or plumbing permit for a Large Development Project or a Small Development Project, or approve a Non-potable Water Engineering Report, prior to the General Manager's determination that the Water Budget Documentation has been prepared in accordance with the General Manager's rules for Water Budget calculations.
(f) Subdivision Approvals.
(1) Parcel Map or Tentative Subdivision Map Conditions. The Director of Public Works shall not approve a tentative subdivision map or a parcel map for any property unless a condition is imposed requiring compliance with this Article 12C to serve the potential uses of the property covered by the parcel map or tentative subdivision map, as specified in the provisions of this Article.
(2) Subdivision Regulations. The Director of Public Works shall adopt regulations consistent with, and in furtherance of this Article 12C.
(3) Final Maps. The Director of Public Works shall not endorse and file a final map for property within the boundaries of the City without first determining that:
(A) The subdivider has complied with the conditions imposed on the tentative subdivision map or parcel map, pursuant to this Article 12C; and
(B) For any such conditions not fully satisfied prior to the recordation of the final map, the subdivider has signed a certificate of agreement and/or improvement agreement, to ensure compliance with such conditions.
(4) This Subsection (f) shall not apply to tentative subdivision maps or parcel maps submitted solely for the purposes of condominium conversion, as defined in Subdivision Code Section 1308(d).
(g) In the event that a privately owned Alternate Water Supply System approved by the General Manager is subsequently determined by the California Public Utilities Commission to be subject to that agency’s jurisdiction and regulation, the San Francisco Public Utilities Commission may, with the consent of the affected owner, acquire and operate the facilities.