CHAPTER 102 REQUIREMENTS CRITCAL STAGES DURING CONSTRUCTION ACTIVITIES
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1 CHAPTER 102 REQUIREMENTS CRITCAL STAGES DURING CONSTRUCTION ACTIVITIES
2 TOPICS Steps Prior to construction Pre-Construction Meeting Defining the Critical Stages with the Contractor Brady s Run Lake Site Observations PCSM Record Drawings/ As-Builts Notice of Termination
3 Steps Prior To Construction Review the specific conditions identified by the permit. Attach Documents to Construction Specifications: - NPDES Permit Documents - E&S/PCSM Plans and Narratives - Co-Permittee/Transferee Document List Contractors Responsibilities in the Specifications
4 Steps Prior To Construction Review the requirements of the permit with the permitee. - Recording Documents - Within 45 Days after Permit Issued - Completion of Construction - Maintain signed Approved Documents at the project site: - E&S Plans - E&S Narrative - PCSM Narrative - NPDES Permit Documents - Pre-Construction Meeting - Review of Critical Stages to be reviewed by Design Professional - Notice of Termination
5 Pre-Construction Meeting Items of Discussion Copy of signed NPDES Documents on Site Completion and Submission of Co- Permittee Documents Identify who must be a co-permittee Visual Site Inspection Report Required Critical Stage Reviews Installation of Perimeter Controls As-Built of BMP s Identified as Critical Stages Outline Areas that must be protected during construction activities
6 Defining Critical Stages Construction of Structural BMP s Including: Stormwater Detention & Retention Basins Sediment Basins Forebay/Infiltration Basins Temporary Sediment Traps Collection, Diversion & Vegetated Swales Rain Gardens Bio-Filtration Swales/Fens Underground Detention / Infiltration Basins Storm Sewers Water Quality Filters Forebay Springfield Township
7 Site Observations Stormwater Detention & Retention Basin Clearing and Grubbing Installation of Control Structure and Outfall Pipe Embankment Construction Basin Dimensions Emergency Spillway Geotechnical Observation & Compaction Testing Installation of Erosion Control Fabric on Slopes Seed and Mulch Stormwater Detention Basin Findlay Township
8 Site Observations Sediment Basin Clearing and Grubbing Installation of Control Structure and Outfall Pipe Embankment Construction Geotechnical Observation & Compaction Testing Installation of Baffle walls, Cleanout Stakes, Skimmer, Emergency Spillway, Etc. Installation of Erosion Control Fabric on Slopes Seed and Mulch Sediment Basin - Muddy Creek Township
9 Site Observations Forebay/Infiltration Basin Clearing and Grubbing Installation of Underdrains Embankment Construction Basin Dimensions Geotechnical Observation & Compaction Testing Minimized Compaction of Basin Invert Over Excavation & Installation of Infiltration Media at Invert Installation of Erosion Control Fabric on Slopes Plantings, Seed and Mulch Infiltration Basin -
10 Site Observations Temporary Sediment Trap Clearing and Grubbing Installation of Outlet Structure Embankment Construction Installation of Baffle walls, Cleanout Stakes, Emergency Spillway, Etc. Installation of Erosion Control Fabric on Slopes Seed and Mulch Collection & Diversion Swales Proper Grades and Dimensions Channel Lining Seeding Sediment Trap Vegetated Swale
11 Site Observations Rain Gardens, Bio- Filtration Swales and Fens Installation of Underdrains Embankment Construction Minimized Compaction of Basin Invert Over Excavation & Installation of Soil Media at Invert Seed and Mulch Plantings Rain Garden/Bio-Swale Findlay Township
12 Site Observations Underground Detention / Infiltration Basins Installation of Underdrain Outlet Control Facility and Outfall Pipe Basin Dimensions Minimized Compaction of Basin Invert Over Excavation & Installation of Infiltration Media at Invert Installation of Detention Structure Bedding and Backfill Material Underground Detention Basin
13 Site Observations Storm Sewer Installation of Pipe Material Installation of Inlet and Manhole Structures Bedding and Backfill Material Storm Sewer System Water Quality Filter Installation of Structure Bedding and Backfill Material Installation of Filter Media Water Quality Unit
14 PCSM Record Drawings/ As-Builts Execute and Record a PCSM Plan within 45 Days after Permit Issuance Depicting Critical Stages Operation and Maintenance Responsibilities Prepare a Record Plan Depicting As-Built Conditions Execute and Record a Final PCSM Plan Depicting the As-Built Conditions Operation and Maintenance Responsibilities PCSM Recording Document
15 Notice of Termination Prepare the Notice of Termination Document Review Site to Confirm that All Disturbed Areas have been Stabilized Confirm BMP s have been constructed to the appropriate dimensions Conservation District Submission: Executed NOT Record Drawing Signed By Design Professional Final Recording Document with Proof of Recording
16 Takeaways Communicate the requirements of the NPDES Permit with the Owner. Communicate your expectations with the contractor. Review BMP s with staff responsible for performing observations. Notify contractor and owner immediately if an issue is observed. Perform visual inspections of soil media. Be proactive regarding documentation and preparation of PCSM recording plans.
17 Questions?
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