§ 170-7. Performance and design criteria.

All land development activities shall be subject to the following performance and design criteria:

A. 

Technical standards. For the purpose of this chapter, the following documents shall serve as the official guides and specifications for stormwater management. Stormwater management practices that are designed and constructed in accordance with these technical documents shall be presumed to meet the standards imposed by this chapter:

(1) 

The Design Manual.

(2) 

The Erosion Control Manual.

(3) 

The Town's Site Design and Development Criteria.

B. 

Where stormwater management practices are not in accordance with technical standards, the applicant or developer must demonstrate equivalence to the technical standards set forth in § 170-7A of this chapter, and the SWPPP shall be prepared by a licensed professional.

C. 

Water quality standards.

(1) 

Any land development activity shall not cause an increase in turbidity that will result in substantial visible contrast to natural conditions in surface waters of the State of New York.

(2) 

Any land development activity within the Town shall provide enhanced phosphorus treatment as outlined by the Design Manual.

D. 

Water quantity standards. Any land development activity shall limit stormwater discharge to an amount no more than 90% of that which occurs currently, except:

(1) 

When the land development activity includes the disturbance of undeveloped or agricultural lands, then the stormwater discharge shall be no more than 90% of that which would normally occur under a natural, undeveloped condition (meadows, brush, and/or woods in good condition as defined by USDA NRCS Technical Release 55 (TR-55), Urban Hydrology for Small Watersheds).