107.6.2 Stormwater.
PC § 107.6.2
Applications for construction document approval shall include submittal documents relating to the availability and feasibility of a public combined or storm sewer or other approved method for stormwater discharge in accordance with Sections 107.6.2.1 and 107.6.2.2 for the following types of applications: 1. New buildings; 2. Alterations of buildings proposing horizontal building enlargement; and/or 3. Alterations that increase impervious surfaces on the tax lot. Exceptions: 1. Applications for construction document approval for the alteration of an existing one- or two-family dwelling need not include such submittal documents, where the footprint of a proposed horizontal building enlargement and any proposed increase in impervious surfaces combined is less than or equal to 200 square feet (19 m2). Construction documents shall include the amount of proposed increase in impervious area. 1.1. This exception shall not apply if the horizontal building enlargement and increase in impervious surface related to the current application for construction document approval and any other enlargement or increase in impervious surface made on the same tax lot after July 1, 2008 together exceed 200 square feet (19 m 2 ).
2.Applications for construction document approval for the alteration of a building need not include such submittal documents, where the increase in area of the footprint resulting from a proposed horizontal building enlargement and any proposed increase in impervious surfaces on a lot combined is less than or equal to 1,000 square feet (93 m2), and on-site disposal of stormwater conforming to the provisions of the applicable laws and rules as determined by the department is proposed for such enlargement and/or increase in impervious surface. Construction documents shall include the amount of proposed increase in impervious area. 2.1. This exception shall not apply where on-site disposal cannot be designed to conform to the provisions of the applicable laws and rules including but not limited to minimum required distances from lot lines or structures or subsoil conditions as determined by the department. 2.2. This exception shall not apply if the horizontal building enlargement and increase in impervious surface related to the current application for construction document approval and all other enlargements or increases in impervious surface made on the same tax lot after July 1, 2008 together exceed 1,000 square feet (93 m 2 ).
