In order to protect the health, safety, and general welfare of the residents of the Municipality, as well as to protect, sustain, and enhance the surface water and groundwater resources of the Municipality, drainage and stormwater management practices shall be utilized as directed herein to achieve the following goals and objectives:
A. 
Accommodate site development and redevelopment in a manner that is consistent with (or reestablishes) the natural hydrologic characteristics of each watershed and sustains groundwater recharge, stream base flows, stable stream channel (geomorphology) conditions, the carrying capacity of streams and their floodplains, groundwater and surface water quality.
B. 
Reduce and minimize the volume of stormwater generated.
C. 
Protect natural infiltration and groundwater recharge rates in order to sustain groundwater supplies and stream base flows and to prevent degradation of surface water and groundwater quality.
D. 
Prevent scour and erosion of stream banks and streambeds.
E. 
Maintain runoff characteristics of the site after development or redevelopment that are consistent with the predevelopment conditions of the receiving streams, and in accordance with the requirements of the Turtle Creek Watershed Act 167 Stormwater Management Plan.
F. 
Protect water quality by removing and/or treating pollutants prior to discharge to groundwater and surface waters throughout the Municipality, and to protect, restore, and maintain the chemical, physical, and biological quality of groundwater and surface waters.
G. 
Reduce flooding impacts and prevent a significant increase in surface runoff rates and volumes, predevelopment to post-development, which could worsen flooding downstream in the watershed, in general, to preserve and restore the natural flood-carrying capacity of streams and their floodplains.
H. 
Protect adjacent lands from adverse impacts of direct stormwater discharges.
I. 
Ensure effective long-term operation and maintenance of all permanent stormwater management facilities.
J. 
Maintain natural drainage patterns and encourage the use of natural drainage systems.
K. 
Treat and release stormwater as close to the source of runoff as possible using a minimum of structures and maximizing reliance on natural processes.
L. 
Provide procedures and performance standards for stormwater planning and management.
M. 
Protect and/or restore natural hydrologic characteristics and habitats wherever possible throughout the watershed systems.
N. 
Address certain requirements of the municipal separate storm sewer system (MS4), National Pollution Discharge Elimination System (NPDES), Phase II stormwater regulations.
O. 
Reduce the impacts of runoff from existing developed sites undergoing redevelopment while encouraging development and redevelopment.
P. 
Meet legal water quality requirements under state law, including regulations at 25 Pa. Code Chapter 93.4a, to protect and maintain existing uses and maintain the level of water quality to support those uses in all streams, and to protect and maintain water quality in special protection streams.