2145 Suttle Avenue Charlotte, N.C. 28208 - 5 2 3 7 August 31, 2017 Mr. Tracy Davis, Director North Carolina Department of Environmental Quality Division of Energy, Mineral and Land Resources Stormwater Permitting Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 RE: Storm Water Management Program Assessment Report Certification NPDES Permit NCS000395 Dear Mr. Davis: In accordance with the National Pollutant Discharge Elimination System (NPDES) Permit Number NCS000395 issued to Mecklenburg County, Charlotte-Mecklenburg School System, Central Piedmont Community College and the Towns of Cornelius, Davidson, Huntersville, Matthews, Mint Hill and Pineville, please find attached the Storm Water Management Program Assessment Report for FY2017 along with a signed certification statement (in duplicate). This year we have elected not to use the NCDEQ web-based reporting gateway. Instead, we are using a reporting framework that we believe will enable us to more effectively evaluate program compliance, the appropriateness of best management practices, and progress towards achieving measurable goals; as well as assess the overall performance and effectiveness of our Storm Water Quality Management Program Plan. Please contact me at (980) 314-3217, if you have any questions or require additional information. Sincerely, Rusty Rozzelle Water Quality Program Manager Attachments: Certification T o report pollution o r drainage prob lems call: 3 1 1 http://stormwater.charmeck.org Storm Water Management Program Assessment Report for Permit No. NCS000395 Reporting Period: July 1, 2016 through June 30, 2017 Co-Permittees: Mecklenburg County, Charlotte-Mecklenburg Schools, Central Piedmont Community College and the Towns of Cornelius, Davidson, Huntersville, Matthews, Mint Hill and Pineville Report Date: August 2017 Report Prepared by: Charlotte-Mecklenburg Storm Water Services 2145 Suttle Avenue Charlotte, NC 28208-5237 Annual Report for July 1, 2016 through June 30, 2017 - Phase II MS4 Permit No. NCS000395 Table of Contents Section 1: Introduction ............................................................................................................. 1 Section 2: Overview ................................................................................................................. 2 Section 3: Public Education and Outreach Program ................................................................ 3 3.1 Implementation Status for FY2017 ......................................................................... 3 3.2 Status of Improvements Identified for Implementation in FY2017........................ 8 3.3 Improvements Identified for Implementation in FY2018 ....................................... 8 Section 4: Public Involvement and Participation Program .................................................... 10 4.1 Implementation Status for FY2017 ....................................................................... 10 4.2 Status of Improvements Identified for Implementation in FY2017...................... 11 4.3 Improvements Identified for Implementation in FY2018 ..................................... 11 Section 5: Illicit Discharge Detection and Elimination Program ........................................... 12 5.1 Implementation Status for FY2017 ....................................................................... 12 5.2 Status of Improvements Identified for Implementation in FY2017...................... 23 5.3 Improvements Identified for Implementation in FY2018 ..................................... 23 Section 6: Construction Site Storm Water Runoff Control Program ..................................... 24 6.1 Implementation Status for FY2017 ....................................................................... 24 6.2 Status of Improvements Identified for Implementation in FY2017...................... 25 6.3 Improvements Identified for Implementation in FY2018 ..................................... 26 Section 7: Post-Construction Site Runoff Control Program .................................................. 27 7.1 Implementation Status for FY2017 ....................................................................... 27 7.2 Status of Improvements Identified for Implementation in FY2017...................... 29 7.3 Improvements Identified for Implementation in FY2018 ..................................... 29 Section 8: Pollution Prevention/Good Housekeeping for Municipal Operations .................. 30 8.1 Implementation Status for FY2017 ....................................................................... 30 8.2 Status of Improvements Identified for Implementation in FY2017...................... 34 8.3 Improvements Identified for Implementation in FY2018 ..................................... 34 Section 9: Total Maximum Daily Loads (TMDLs) ............................................................... 35 9.1 Implementation Status for FY2017 ....................................................................... 35 9.2 Status of Improvements Identified for Implementation in FY2017...................... 39 9.3 Improvements Identified for Implementation in FY2018 ..................................... 39 Section 10: Program Effectiveness .......................................................................................... 40 Section 11: Program Enhancements for FY2018 ..................................................................... 41 Section 12: Storm Water Quality Management Program Plan Modifications for FY2017 ..... 43 Figures Figure 1: Mecklenburg County Phase II Stream Monitoring Sites............................................... 21 Figure 2: Stream Walk/Outfall Inspection-Inventory ................................................................... 22 Figure 3: Notices of Violation Issued Per 100 Inspections from FY2011 through FY2016 ........ 25 Figure 4: Waters of Mecklenburg County with Approved TMDLs ............................................. 38 i Annual Report for July 1, 2016 through June 30, 2017 - Phase II MS4 Permit No. NCS000395 Tables: Table 1: BMP Summary Table for the Public Education and Outreach Program .......................... 3 Table 2: Presentations Conducted in FY2017 ................................................................................ 6 Table 3: Events Attended in FY2017.............................................................................................. 7 Table 4: Status of Improvements Identified for FY2017 Implementation ..................................... 8 Table 5: BMP Summary Table for the Public Involvement and Participation Program .............. 10 Table 6: Status of Improvements Identified for FY2017 Implementation ................................... 11 Table 7: BMP Summary Table for the IDDE Program ................................................................ 12 Table 8: Action/Watch Level Exceedances Identified by Fixed Interval Monitoring .................. 18 Table 9: Number and Type of Service Requests and Emergency Responses by Jurisdiction ...... 20 Table 10: Status of Improvements Identified for FY2017 ............................................................ 23 Table 11: BMP Summary Table for the Construction Site Storm Water Control Program ......... 24 Table 12: Status of Improvements Identified for FY2017 ............................................................ 25 Table 13: BMP Summary Table for the Post-Construction Site Runoff Control Program .......... 27 Table 14: Summary of BMP Inspections ...................................................................................... 28 Table 15: Summary of BMP Education ........................................................................................ 28 Table 16: BMP Inspections Revealing Problems from 2007 through 2017 ................................. 28 Table 17: Status of Improvements Identified for FY2017 ............................................................ 29 Table 18: BMP Summary Table for the Pollution Prevention/Good Housekeeping Program ..... 30 Table 19: Employee Training by Jurisdiction in FY2017 ............................................................ 32 Table 20: Summary of Inspection Findings from FY2008 through FY2017 ............................... 33 Table 21: Status of Improvements Identified for FY2017 ............................................................ 34 Table 22: BMP Summary Table for the TMDL Program............................................................. 35 Table 23: Approved TMDLS for Mecklenburg County’s Phase I and Phase II Jurisdictions ..... 36 Table 24: Measures of Success in FY2017 ................................................................................... 40 Table 25: Improvements Identified for Implementation in FY2017 ............................................ 41 Attachments Attachment 1: Evaluation of the Effectiveness of the TMDL Program ....................................... 44 ii Annual Report for July 1, 2016 through June 30, 2017 - Phase II MS4 Permit No. NCS000395 Section 1: Introduction This document satisfies the annual reporting requirement of Storm Water Permit No. NCS000395 as follows: • Evaluate program compliance, the appropriateness of best management practices (BMPs), and progress towards achieving measurable goals; and • Evaluate the performance and effectiveness of the Storm Water Quality Management Program Plan, herein referred to as the Storm Water Plan. The purpose of the Storm Water Plan is to describe the actions undertaken by the Permittee to ensure compliance with Permit