Maui Department of Transportation MS4 Compliance
EnviroServices & Training Center (ETC) was contracted to provide environmental compliance support to the State of Hawaii Department of Transportation (DOT), Highways Division, Maui District (HWY-M) to meet stormwater compliance requirements associated with their municipal separate storm sewer system (MS4). Specifically, HWY-M was issued an MS4 NPDES Permit that required them to develop and implement control measures to prevent polluted runoff from entering and discharging from their MS4. ETC helped to establish and implement the following:
Program Management – ETC guided HWY-M through a successful Environmental Protection Agency (EPA) Audit, updated the Stormwater Management Plan to address new requirements of the MS4 NPDES Permit, and developed and submitted Annual Reports in compliance with their MS4 NPDES Permit.
Mapping of MS4 Structures – ETC developed an inventory of MS4 structures within the HWY-M MS4 area and created GIS maps of the hundreds of structures, including inlets, manholes, pipes, culverts, outfalls, open channels, and junctions.
Asset Management System – ETC designed an Asset Management System to identify and display the MS4 network inventory, store assets and records, track task performance, schedule preventative maintenance and site inspections, create inspection and summary reports, and deliver program analytics.
Public Education and Outreach – ETC developed public education and outreach programs, materials, and partnerships to provide stormwater awareness and training to targeted audiences that included HWY-M MS4 users, contractors, DOT personnel, maintenance staff, industrial and commercial businesses, schools, and other stakeholders.
Illicit Discharge Detection and Elimination – ETC developed and implemented procedures to respond to detect and eliminate against illicit discharges and illegal connections that impact the HWY-M MS4, including use of field investigations, industrial and commercial facility inspections, and outfall screening.
Construction Best Management Practices – ETC developed and implemented construction plan review, inspection, and enforcement procedures to manage compliance with sediment and erosion control requirements on HWY-M construction projects.
Post-Construction Best Management Practices – ETC developed and implemented procedures to inspect and maintain existing post-construction measures, in addition to review and ensure implementation of new post-construction measures that mitigate stormwater runoff on HWY-M construction projects. ETC also participated in inter-governmental collaboration to revise the DOT Storm Water Post-Construction BMP Manual.
Pollution Prevention and Good Housekeeping – ETC assisted in the development of contract bid specifications for the inspection and maintenance of MS4 structures and roadways. These bid specifications included requirements for drain inspection and cleaning, pipe inspection and cleaning, and street sweeping. ETC also created plans, specifications, and estimates to repair erosional areas.
