Tina R. Evans, PE, CISEC HydroDynamics Incorporated Parker, CO HDI

Transcription

1 Tina R. Evans, PE, CISEC HydroDynamics Incorporated Parker, CO

2 PREPARING FOR THE START OF CONSTRUCTION Environmental Regulatory Tasks Remain compliant Steps to Consider Know the Rules and Regulations

3 PREPARING FOR THE START OF Rules and Regulations HAR-54 CONSTRUCTION

4 PREPARING FOR THE START OF Rules and Regulations HAR-54 HAR-55 Appendix C CONSTRUCTION

5 PREPARING FOR THE START OF Rules and Regulations HAR-54 HAR-55 EPA CONSTRUCTION

6 PREPARING FOR THE START OF CONSTRUCTION

7 PREPARING FOR THE START OF CONSTRUCTION

8 By January 15 of each year, penalty is adjusted for inflation

9 $21,393 $21, Penalties $267,415 $53,484 By January 15 of each year, penalty is adjusted for inflation

10 PREPARING FOR THE START OF CONSTRUCTION Environmental Regulatory Tasks Remain compliant Steps to Consider Know the Rules and Regulations Review and Understand the SWPPP

11 Demolition and Erosion Control Plan Water Quality and Berm Site Plan Grading and Drainage Plan Erosion Control Detail Landscaping Plan

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13 Earthen Berm Compost Filter Socks Catch Basin Inlet Protection Dust Fence Sand Bag Compost Filter Socks Contractor shall install sand bags at existing 54-inch outlet, and temporary earthen berm prior to conducting any earthwork activities Stabilized Construction Entrance Demolition and Erosion Control Plan

14 Earthen Berm Compost Filter Socks Catch Basin Inlet Protection Dust Fence Sand Bag Compost Filter Socks Contractor shall install sand bags at existing 54-inch outlet, and temporary earthen berm prior to conducting any earthwork activities Shouldn t the construction entranceway be one of the first items installed? Stabilized Construction Entrance When should installation of the following occur? Dust Fence Catch Basin Inlet Protection Compost Filter Socks in the channel Compost Filter Socks around the Channel Outlet?

15 Limit of permanent erosion control matting Site Grading and Drainage Plan

16 Permanent Erosion Control Matting 8 perforated riser pipe wrapped with geotextile fabric (non-woven) If sediment laden runoff waters exist, fabric material may clog Do specifications for a permanent erosion control matting exist? Won t geotextile fabric material around the riser pipe clog when sediment laden waters exist? Water Quality Basin Outlet/Emergency Spillway

17 Sprigs and Hydromulch cover Why isn t the permanent erosion control matting around the berm illustrated on this plan? Sprigs and Hydromulch cover Sprigs and Hydromulch cover Landscape Plan

18 Are These Erosion Control BMPs? 1. Construction Entrance 2. Dust Fence 3. Catch Basin Inlet Protection 4. Compost Filter Socks Erosion Control Detail Contractor to remove sediment control filter in the event of an above average rainfall and replace the filter after the storm has passed. Erosion Control Detail

19 PREPARING FOR THE START OF CONSTRUCTION Environmental Regulatory Tasks Remain compliant Steps to Consider Know the Rules and Regulations Review and Understand the SWPPP Attend a Pre-Construction (Pre-Con) Meeting Ask questions Understand obligations

20 During the Preconstruction Meeting Demolition and Erosion Control Plan Shouldn t the construction entranceway be one of the first items installed? When should installation of the following BMPs occur? Dust Fence Catch Basin Inlet Protection Compost Filter Socks in the channel Compost Filter Socks around the Channel Outlet? Where is the schedule to install BMPs? Demolition and Erosion Control Plan

21 During the Preconstruction Meeting Berm and Water Quality Basin Outlet Won t geotextile fabric material around the riser pipe clog when sediment laden waters exist? Water Quality and Berm Plan

22 During the Preconstruction Meeting Erosion Control Detail Sheet Isn t this a sediment control detail sheet? Where are the details for installing the permanent erosion control matting? If the True Dam sediment filter is not used, how is approval obtained to use and alternative measure? Who decides what is an appropriate alternative measure? Will the regulatory agency provide a written approval letter for an alternative method? Who determines when an above average rainfall is (or will be) occurring to allow for the removal of sediment control filters? Erosion Control Detail

23 During the Preconstruction Meeting Inspections No instructions are provided in the SWPPP Who is responsible? How frequently should inspections occur? What will be reviewed? BMPs, narrative, prior inspection items, updates, etc. What role will designers/reviewers play? Non-Compliant Situations How are they to be addressed by the permittee? How soon must they be corrected after detected? Minor vs major problems.

24 During the Preconstruction Meeting What is the process for field updates? Nonfunctional BMPs New BMPs Approval Obligations when severe or continual runoff damages or destroys existing BMPs Repair/replacement of BMPs and cleanup When are the temporary sediment control structures to be removed? Who determines when this happens?

25 PREPARING FOR THE START OF CONSTRUCTION--SUMMARY Environmental Regulatory Tasks Remain compliant Steps to Consider Know the Rules and Regulations Review and Understand the SWPPP Attend a Pre-Construction (Pre-Con) Meeting Ask questions Understand obligations Implement Before Grading BMPs Prior to any significant excavation or construction activities Be Flexible

26 Tina Evans HydroDynamics, Inc