ETM has, since 1991, assisted the City of Jacksonville and its NPDES Co-Permittee FDOT District 2 in meeting their Stormwwater Management operations and NPDES permit compliance requirements. Between 1991 and 1997 ETM worked closely with the City and FDOT to perform water quality sampling, outfall monitoring, and development of a Stormwater Management Plan as part of the initial Phase I NPDES permit application.
During the first and second NPDES Permit cycles, ETM conducted a field inventory and developed a GIS based inventory of the City’s MS4. ETM continues to update the MS4 inventory using ESRI ArcGIS 10.3. Today the inventory contains over 200,000 MS4 infrastructure components that represent over 1,700 miles of closed conveyance, over 1200 miles of open conveyance, over 70,000 inlets and control structures in over 500 stormwater treatment ponds across a 750 square mile MS4 service area. During this period ETM served as an extension of staff; conducting Illicit Discharge Detection and Elimination investigations and assisting in the preparation of each NPDES Annual Report. In 2005, ETM developed an ArcIMS website which enabled the City and FDOT District 2 personnel to view and query the MS4 inventory and IDDE database.
The issuance of the Cycle 3 Permit presented the City with a number of MS4 operations, NPDES Permit as well as Nutrient and Fecal Coliform Basin Management Action Plan compliance and TMDL implementation challenges. During the first year of the Cycle 3 Permit ETM updated the City’s Stormwater Management Plan and standard operating procedures, prepared a staff and contractor training, and Public Outreach and Educations plans.
ETM’s past work including the NPDES GIS database has also been leveraged to develop and release to staff ESRI ArcServer based inspection tools to support stormwater utility operations as well as water quality improvement and enforcement inspections.
- MS4 Structural Control Inspections and follow-up routine maintenance and cleaning.
- Proactive and Reactive Illicit Discharge Detection and Elimination Investigations
- Private Lift Station Inspections
- High Priority Industry and MSGP permit holder site Inspections
- Illegal Dumping Investigation & Removal
- Public Outreach & Education activity and event tracking
All the modules and underlying data are maintained and hosted by ETM via a secure level 3 hosting site which also utilizes cloud based file and database management services. City and FDOT District 2 staff have access to the database and can extract information via predefined reports and to Microsoft Excel. Spatial data can also be downloaded to desktop ArcGIS for special project and work planning purposes. The information maintained within each inspection tool is also used to support preparation of NPDES Cycle 3 Permit and BMAP Annual Reports.