Drainage Area Plan(s) | - Predevelopment and post-development drainage areas (including any off-site area)
- Location of point(s) of analysis (POA)
- Pertinent existing stormwater infrastructure necessary to define existing drainage conditions
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Inlet Drainage Area Plan | - Predevelopment and post-development inlet drainage area delineations (including any roof leaders)
- Calculated areas of drainage and time of concentration to each inlet
- Impervious and pervious cover and runoff coefficients within each drainage area
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PWD Stormwater Plan Review Online Technical Worksheet | - PDF printout of completed Online Technical Worksheet. For submissions via the Project Dashboard on the PWD Stormwater Plan Review website, a PDF is automatically generated and submitted.
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Geotechnical Report | - Signed and sealed by a Professional Engineer
- Detailed description of testing procedure and materials/apparatus used
- Weather information at time of testing and previous 24 hours (temperature, rainfall, etc.)
- Engineer’s analysis and summary of all results including soil classification (in accordance with ASTM D2488) and site evaluation
- Engineer’s affirmative or negative recommendation on feasibility of infiltration, with justification
- Infiltration Testing and Soil Characterization Plan (including, but not limited to, topographic/existing features of the site showing location of test pits/borings and infiltration tests)
- Field boring/test pit logs for soil profiling
- Infiltration Testing Log (Appendix H provides a template, which shows minimum level of information that must be provided)
- Sieve analysis results per ASTM D422-63, down to No. 200 sieve, and USCS classification per ASTM D2487 of each sample
- Photographs of testing
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Media Filter Design Documentation | - Inflow and outflow event mean concentrations and percent removals for Total Suspended Solids (TSS) for sand/media filters (Designs must demonstrate a maximum effluent event mean concentration of 15 milligrams per liter for TSS at a POA downstream of the SMP)
- Third-party certifications for proprietary media filters
- Hydrologic and hydraulic model files, if applicable
- Product specifications for proprietary media filters
- Manufacturer’s guidelines for installation for proprietary media filters
- Construction sequence
- Maintenance requirements, including product life and replacement schedule, if applicable
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Low Flow Device Design Documentation | - Performance/discharge curves
- Third-party certifications
- Hydrologic and hydraulic model files, if applicable
- Product specifications
- Manufacturer’s guidelines for installation
- Construction sequence
- Maintenance requirements, including product life and replacement schedule, if applicable
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SMP Maintenance Guide (Appendix G) | - SMP Maintenance Guide Introduction
- Customized, from the third page of the SMP Maintenance Guide Information document provided in Appendix G, to be site-specific
- Provides under its cover an SMP Maintenance Guide Site Map and SMP Maintenance Schedule Forms
- SMP Maintenance Guide Site Map
- Identifies the on-site SMPs and key SMP-related features which require maintenance, using unique, legible, labels, and provides a list of structures and SMP-related features, identifying the associated SMP(s) for each
- Includes a Color Legend that adheres to the Color Legend provided in the SMP Maintenance Guide document provided in Appendix G
- Sized 11” x 17” (Multiple sheets may be used, if necessary)
- Consistent in format with the SMP Maintenance Guide Sample’s Site Map, provided in Appendix G
- SMP Maintenance Schedule Forms
- Customized from the templates provided in Appendix G to be site-specific for each proposed SMP
- Provide for inspection of each SMP and SMP-related structure, including routine maintenance, repair, and replacement
- Provide for a report documenting each inspection and all SMP maintenance activities performed as a result of the inspections
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Construction Certification Package with Customized SMP Construction Certification Forms (Appendix J) | - One site-specific SMP Construction Certification Form for each SMP
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Proof of Applicable State and/or Federal Permits | - Typical permits (as applicable):
- Pennsylvania Code and Charter Chapter 102 NPDES National Pollutant Discharge Elimination System Phase II Permit for Construction Activities
- Pennsylvania Code and Charter Chapter 105: Water Obstruction and Encroachment General and Joint Permits
- Other applicable permits (Sections 2.5, 2.6, and 2.7 provide resources to assist in determining which permits may apply)
- Proof of issuance is required for PWD sign-off on a Building Permit; however, the applicant must only prove that they have applied for all applicable permits via copies of permit applications, application receipts, or notification letters from relevant agencies
- For Pennsylvania Land Recycling Program (Act 2) sites, proof of notice to PA DEP for both an intent to remediate and notification of work to an existing Act 2 site is required
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