In Special Mixed Use Districts, all new dwelling units shall be provided with a minimum 35dB(A) of window wall attenuation to maintain an interior noise level of 45dB(A) or less, with windows closed, and shall provide an alternate means of ventilation. However, upon application to the Office of Environmental Remediation (OER) by the owner of the affected building, consistent with its authority under the provisions of Section 11-15 (Environmental Requirements) with respect to (E) designations, OER may modify the requirements of this Section, based upon new information, additional facts or updated standards, as applicable, provided that such modification is equally protective. In such instances, OER shall provide the Department of Buildings with notice of such modification, stating that it does not object to the issuance of a building permit, or temporary or final certificate of occupancy.