All development shall include the following additional pollution reduction techniques:
(A) No untreated run-off arising from development shall be allowed to flow over critical environmental features that are recharge features.
(B) No untreated run-off arising from development, shall be allowed in defined channels containing recharge features provided that for single family residential lots adjacent to transition zones, untreated run-off may be discharged through the transition zone provided that the transition zone meets the criteria in the City of Austin Environmental Criteria Manual, as amended, for vegetative filter strips.
(C) Developments must provide detention for the two-year storm, unless it is determined by the city that the development is a participant in a regional stormwater detention facility, or centralized detention facility, or control of the two-year storm will result in identifiable adverse flooding as determined by a Registered Professional Engineer and confirmed by the City Engineer.
(D) Commercial development shall also include two of the following four pollution reduction measures:
(1) Xeriscape with a fertilizer reduction element and an integrated pest management plan;
(2) A street sweeping program or covered parking with parking drainage isolated from stormwater;
(3) Construction restricted to 0% to 10% slopes;
(4) The design includes separation of roof run-off from other filtered run-off volumes and reirrigates this on the site.