No earth/moving or land disturbance activity shall commence before stormwater management plans for the site have been reviewed by an engineer with expertise in stormwater management and are approved by the municipality.
A. 
Subdivisions or land developments that do not create more than 7,500 square feet of new impervious land area shall be exempt from the stormwater plan requirements of this chapter.
B. 
For parcels under single ownership, no more than one subdivision or land development creating less than 7,500 square feet of new impervious surface shall be permitted before requiring a stormwater management plan for the entire parcel.
C. 
Application procedures for exempt developments:
(1) 
Persons engaged in land alteration of exempt development sites are exempt only from the full stormwater plan requirements of this chapter. They are still responsible for applying sound stormwater management practices in accordance with the standards of this chapter and the Pennsylvania Stormwater Management Act (Act 167)[1] in the development of the site.
[1]
Editor's Note: See 32 P.S. § 680.1 et seq.
(2) 
A sketch stormwater plan showing the name of the watershed, its subarea, the appropriate release rate percentage as well as the location and nature of the proposed stormwater management techniques for the site shall be submitted to the municipal engineer and shall conform to the standards of § 195-22F of Chapter 195, Subdivision and Land Development, of the Code of the County of Delaware.
(3) 
The stormwater plan for the site must be approved by the municipal engineer prior to the issuance of any building permits.
In addition to the plan requirements contained in §§ 195-13, 195-15 and 195-17 of Chapter 195, Subdivision and Land Development, of the Code of the County of Delaware, the following stormwater-related items shall be included as part of the plan submission:
A. 
Sketch plan contents.
(1) 
The name of the watershed and the subarea in which the site is located as well as the appropriate release rate percentage.
(2) 
Existing ground cover conditions.
(3) 
Definition of existing drainage paths and drainage area boundaries.
(4) 
Definition of existing drainage problems.
(5) 
Appropriate stormwater management performance standards as defined in the standards and criteria section of the Ridley Creek Stormwater Management Plan.
(a) 
Release rate percentage.
(b) 
Direct discharge.
(c) 
Downstream impact evaluation.
B. 
Preliminary plan contents.
(1) 
Data requirements as set forth for the sketch plan.
(2) 
Architectural layout of existing and proposed streets, buildings, approximate building dimensions, parking areas, walkways, and other impervious areas.
(3) 
Configuration of the storm and sanitary sewer system layout.
(4) 
Approximate location and layout of the stormwater management system with a description of its proposed design and operation.
(5) 
Existing and proposed drainage easements.
(6) 
Preliminary runoff calculations as set forth in the Ridley Creek Stormwater Management Plan.
(7) 
Tentative ownership and maintenance provisions for all stormwater related facilities.
C. 
Final plan contents.
(1) 
Data requirements as set forth for the preliminary plan.
(2) 
Final layout of existing and proposed streets and buildings, actual building dimensions, parking areas, and other impervious areas.
(3) 
Exact location and layout of the stormwater management system with a detailed description of its proposed design and operation.
(4) 
Detailed runoff calculations as set forth in the Ridley Creek Stormwater Management Plan.
(5) 
Final ownership and maintenance provisions for all stormwater-related facilities.
(6) 
Modifications requested by the municipality during the preliminary review phase.