1. Neponset Valley Stormwater Collaborative Steering Committee Meeting
November 13, 2014
10am – noon
Analog Devices

2. New to the 2014 Draft Permit Enhanced IDDE Program requirements
Catchments
Investigation Procedures
Data reporting
Bacteria TMDL waters
Mapping, sso tracking, data management

3. Outfalls discharging to waters impaired for bacteria subject to bacteria TMDL
Outfalls that need to be High or Problem
Total Number of outfalls
Percentage
Canton
214
277
77%
Dedham
125
200
63%
Medfield
322
426
76%
Milton
167
178
94%
Randolph
222
564
39%
Sharon 20
237 8%
Stoughton 53
207
26%
Walpole
227
411
55%
Westwood
230
372
62%
Enhancement of BMPs required by Part 2.3 of the permit that shall be implemented during this permit term:
1. Part Public Education: The permittee shall supplement its Residential program with an annual message encouraging the proper management of pet waste, including noting any existing ordinances where appropriate. The permittee or its agents shall disseminate educational materials to dog owners at the time of issuance or renewal of a dog license, or other appropriate time. Education materials shall describe the detrimental impacts of improper management of pet waste, requirements for waste collection and disposal, and penalties for non-compliance. The permittee shall also provide information to owners of septic systems about proper maintenance in any catchment that discharges to a water body impaired for bacteria or pathogens.
2. Part Illicit Discharge: Catchments draining to any waterbody impaired for bacteria or pathogens shall be designated either Problem Catchments or HIGH priority in implementation of the IDDE program.

4. Timeline Year 1 Year 2 Year 3 Year 5 Year 10
Complete Outfall Inventory
Priority Rank all Catchments
Complete written IDDE Plan
Begin Catchment Investigation Procedure
Year 2
Complete additional mapping requirements
Year 3
Screen and Sample all outfalls/interconnections during dry weather
Investigate 80% of Problem Catchments
Year 5
Investigate 100% of Problem Catchments
Investigate all catchments with evidence of sewage input from outfall screening
Investigate 40% of total MS4 area
Year 10
Investigate 100% of total MS4 area

5. IDDE Plan Document Legal Authority Statement of IDDE Responsibilities
Assessment and Priority Ranking of Catchments
Outfall and Interconnection Screening and Sampling
Catchment Investigation Procedure
Illicit Discharge Removal and Confirmation
Follow-up Screening
Illicit Discharge Prevention Procedures
Red text needs to be updated for individual Town

6. Attachments to Plan
Field sheets, SOP from Central MA group on locating illicit discharges, etc.

7. Outfall Tables

8. Regional Collaboration Survey
4 Towns responded (Sharon, Canton, Dedham, Milton)
100% interested in collaboration!
Staff do not have enough time to meet IDDE requirements
Benefits:
Save Money
Save time
Work across town boundaries