Stormwater 101: How to stay out of trouble with TDEC Agenda Who is covered by CGP? TBR construction site CGP compliance process CGP primer: Non-construction related stormwater issues Streams: What you can do around them and what you cant 2 Construction General Permit All disturbances 1 acre: Regulated by TDEC Notice of Coverage
Site-specific SWPPP Twice weekly inspections SWPPP updates Rainfall monitoring Site assessments Final stabilization Notice of Termination 3 Construction General Permit - TBR Universities MS4 permit A/E firm:
SWPPP, NOI twice weekly inspections NOT University: 3rd party SWPPP review 4 monthly audit Community colleges, TCATs
A/E/ firm: SWPPP, NOI twice weekly inspections NOT CC, TCAT: Keep an eye on site TBR Project Designer Design, including stormwater List of acceptable
practices Design includes permanent SW treatment practices Plans review checklist CGP application Design guidance TDEC NOC As Built Certification form As built certification
Late 2015 Contractor: twice weekly inspections Standard operation and maintenance plans Maintenance SOP by campus Construction begins Construction
complete Long term maintenance Monthly Audit checklist: University Rep Notice of Termination: TBR Project Manager Completed by consultant TBR Project submittal toDesigner Before TDEC Design, including stormwater List of acceptable practices
Design includes permanent SW treatment practices Plans review checklist CGP application Design guidance TDEC NOC As Built Certification form As built certification Construction
begins Contractor: twice weekly inspections Standard operation and maintenance plans Maintenance SOP by campus Construction complete Long term maintenance Monthly Audit checklist:
University Rep Notice of Termination: TBR Project Manager Discuss at Precon NOC post on job board TNRXXX <- permit tracking number Rainfall monitoring Discuss at Precon Twice weekly inspections Contractor to perform and document Documentation should stay with field SWPPP
Site assessments Designer to perform PE, Landscape Architect, Certified Professional in Erosion and Sediment Control (CPESC), Certified Professional in Storm Water Quality (CPSWQ), TDEC Level II certified. Documentation should stay with field SWPPP TBR/University rep performs monthly audits to ensure contractor and designer are complying TBR Audit Rainfall depth and estimated storm duration should be reported Ex: 0.7 inches in 2.5 hours 2yr, 24hr or 5yr, 24hr storm Google: NOAA Atlas 14
For TSU: 2.25 inches in 1 hour Tip: Print the table at the beginning of construction and put it with the SWPPP How do you use that? Why did the measure fail? Large rain event that exceeded the design storm Poor maintenance
Poor installation Too much drainage area Helps the inspector give recommendations Site check Generally verify site conditions match the inspection documentation TBR Project Final stabilization = at least 70% coverage with permanent ground cover List of acceptable
practices Stormwater how-to for TBR project managers Designer Design includes permanent SW treatment practices Design, including stormwater Plans review checklist CGP application Design
guidance TDEC NOC As Built Certification form As built certification Construction begins Contractor: twice weekly inspections Standard operation and maintenance plans
Maintenance SOP by campus Construction complete Long term maintenance Monthly Audit checklist: University Rep Notice of Termination: TBR Project Manager Non-construction related SW issues
18 Illicit discharges Only stormwater is allowed in stormwater system Non-stormwater: Coolant Oil, grease
Cleaning fluids Paint washup Good housekeeping practices Materials management Fluids, solvents, materials that can mix with rainfall runoff should be stored under cover or inside a building Washout containers, wash vehicles on grassy surfaces
Streams Routine maintenance Mow, remove vegetation Construction related Cannot remove vegetation Can mow grasses (not bush hog) Permits required: To realign stream To cross stream (roads) Ditch or Stream? Get a stream determination by Qualified Hydrologic Professional or TDEC dont guess! 19 Questions?
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