2017 annual report – ms4 general permit city of …...2018/02/15 · 1 ms4 general permit city of...

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2017 Annual Report – MS4 General Permit

City of DanburyDanbury, Connecticut

February 2018

Prepared by:

146 Hartford RoadManchester, CT 06040

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MS4 General PermitCity of Danbury 2017 Annual Report

Existing MS4 PermitteePermit Number GSM 000080

January 1, 2017 – December 31, 2017

This report documents City of Danbury’s efforts to comply with the conditions of the MS4 General Permit to the maximum extent practicable (MEP) fromJanuary 1, 2017 to December 31, 2017.

Part I: Summary of Minimum Control Measure Activities

1. Public Education and Outreach (Section 6 (a)(1) / page 19)

1.1 BMP Summary

BMP Status Activities in currentreporting period Measurable goal

Department/ PersonResponsible

Due

Datecompleted orprojectedcompletiondate

Additional details

1-1 Implementpublic educationand outreach

Complete The City has updatedtheir website to include anumber of educationalmaterials/links.

Update and maintain Citywebsite to includeeducational materials.

PublicWorks

Jul 1, 2018 Feb 1, 2018 Education Materials/Links:· Garbage Pickup & Recycling

Information· EPA – After the Storm· EPA – Make Your Home the

Solution to StormwaterPollution

· CT NEMO MS4 Guide· River Smart CT· Relevant Sections from the

Code of Ordinances

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Department/ PersonResponsible

Due


Additional details

1-2 Addresseducation/ outreachfor pollutants ofconcern*

Complete Posted educationmaterials/links on theCity’s website addressingimpaired waters andstormwater pollutants ofconcern.

Select educationalmaterials appropriate forimpaired waters andstormwater pollutants ofconcern.

PublicWorks

Jul 1, 2018 Feb 1, 2018

1.2 Describe any Public Education and Outreach activities planned for the next year, if applicable.

· Continue the annual Still River Outdoor classroom through collaboration with the Housatonic Valley Association, the Still River Alliance, and the Board of Education.· Continue to collaborate with the News Times to print environmental articles.· Continue to work with/support the Candlewood Lake Authority, Lake Kenosia Commission, Still River Alliance, Housatonic Valley Association, and other local and regional

organizations with environmental public education and outreach programs.· Continue the annual Public Works Awareness Day at which school children are bussed to the Public Works Complex for demonstrations, ect. Children are provided

recycling educational materials, etc.

1.3 Details of activities implemented to educate the community on stormwater

Program Element/Activity Audience (and numberof people reached) Topic(s) covered

Pollutant of Concernaddressed(if applicable)

Responsible dept. or partner org.

ActivitiesClean City Danbury DayMay 6, 2017

All City Residents(130 tons of rubbishremoved)

Litter Cleanup N/A Mayor’s Office and Public Works

Candlewood Lake CleanupMay 20, 2017

All City Residents150+ Volunteers(~ 30 cubic yards ofrubbish removed)

Litter Cleanup N/A Candlewood Lake Authority

Still River Watershed Connections Crew PublicPresentationAugust 23, 2017

All City Residents Water Quality of theStill River

N/A Housatonic Valley Association

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Still River Outdoor ClassroomOctober 4, 2017

Danbury ElementarySchools(140 Students)

Water Quality andStormwater RunoffPollution

N/A Housatonic Valley Association and theStill River Alliance

City of Danbury’s Clean Start ProgramOngoing

Residents of theDanbury homelesscommunity(10 participants for 4hours, 2 days a week)

Litter Cleanup N/A Mayor’s Office and the JerichoPartnership

Newspaper ArticlesThe News Times – Candlewood Lake Record SewageKept Out of WatersMarch 26, 2017

All City Residents Cleanup of CandlewoodLake

Nutrients, bacteria Candlewood Lake Authority

The News Times – Get Downtown: Group Helps withCleanup, May 10, 2017

All City Residents Clean City Danbury Day N/A Mayor’s Office

The News Times – Water Getting CleanerMay 13, 2017

All City Residents Water quality ofCandlewood Lake

N/A Candlewood Lake Authority

The News Times – Thumbs up, thumbs downMay 16, 2017

All City Residents Water quality ofCandlewood Lake

N/A Candlewood Lake Authority

The News Times – Residents Urged to Dispose LeavesSafelyNovember 2, 2017

All City Residents Leaf Disposal Program Nutrients Public Works

BrochuresPublic Works Stormwater BrochuresDistributed in Front Lobby of City Hall

All City Residents(63 brochures taken)

StormwaterManagement andPollution Prevention

N/A Public Works

EPA After the Storm BrochureProvided on City’s Website andin Front Lobby of City Hall

All City Residents StormwaterManagement andPollution Prevention

N/A US Environmental Protection Agency

EPA Make Your Home the Solution to StormwaterPollution BrochureProvided on City’s Website

All City Residents StormwaterManagement andPollution Prevention

Petroleum, nutrients,toxic chemicals,bacteria, chlorine

US Environmental Protection Agency

Ice and Snow Operations: Salt Only BrochureDistributed in Front Lobby of City Hall

All City Residents Snow/Ice ManagementMethods

N/A Public Works

Housatonic Resources Recovery Authority (HRRA)Wipe Out Waste BrochuresDistributed in Front Lobby of City Hall


Contains “LitterPrevention” Section

N/A Housatonic Resources RecoveryAuthority

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Ferris Mulch BrochuresDistributed in Front Lobby of City Hall


Leaf Disposal Program Nutrients Ferris Mulch Products

City Website ResourcesCandlewood Lake Authority Website

· Stormwater Management· Property Design· Lake Friendly Living Tips

Candlewood LakeResidents

StormwaterManagement andPollution Prevention

Petroleum, nutrients,toxic chemicals,bacteria

Candlewood Lake Authority

Lake Kenosia Commission Website· What you can do to help the lake· Lake Kenosia Buffer Gardens Project· Promising non-chemical weed management

alternatives· A non-technical summary of current

environmental conditions in Lake Kenosia

Lake Kenosia Residents StormwaterManagement andPollution Prevention

Nutrients and toxicchemicals

Lake Kenosia Commission

CT NEMO MS4 Guide LinkProvided on City’s Website

All City Residents StormwaterRegulations

N/A CT NEMO MS4

River Smart CT LinkProvided on City’s Website

All City Residents Pollution Prevention N/A River Smart CT

Outreach Training: Fats, Oils, GreaseProvided on City’s Website

All City Residents Fats, Oils, and GreaseBMPs

F.O.G. Public Works / Public Utilities

Fats, Oils, Grease (F.O.G.): What not to put down yourdrain!Provided on City’s Website



Best Management Practices Check ListProvided on City’s Website



Notification of ByPass Event to Public UtilitiesInformationProvided on City’s Website

All City Residents How to report a bypassevent

Bacteria, nutrients Public Works / Public Utilities

Department of Public Health Fact SheetSewage BackupsProvided on City’s Website

All City Residents Preventing SewageBackups

Bacteria, nutrients Public Works / Public Utilities

Ferris Mulch Brochures and Web LinkProvided on City’s Website

All City Residents Leaf Disposal Program Nutrients Ferris Mulch Products

City Website Postings· Spring Leaf Pickup Program, April 17, 2017· Fall Leaf Pickup Program, October 16, 2017

All City Residents Leaf Disposal Program Nutrients Public Works

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2. Public Involvement/Participation (Section 6(a)(2) / page 21)

2.1 BMP Summary


Department /PersonResponsible

Due

Datecompletedor projectedcompletiondate

Additional details

2-1 Comply with publicnotice requirements forthe StormwaterManagement Plan

Complete The draft StormwaterManagement Plan was madeavailable to the public:· Hard copies were made

available in City Office.

Make draft StormwaterManagement Planavailable electronicallyon the City website andpaper copies available inCity office. Publish noticeof availability on websiteor local newspaper.

Public Works,Engineering

Apr 3, 2017 Apr 3, 2017

Complete The final StormwaterManagement Plan was madeavailable to the public:· Hard copies were made

available in City Hall.

Make final StormwaterManagement Planavailable electronicallyon the City website andpaper copies available inCity Hall.

PublicUtilities,Engineering

Jul 1, 2017 Jul 1, 2017

2-2 Comply with publicnotice requirements forAnnual Reports

InProgress

A public notice was posted tothe City’s website.

Make draft AnnualReport availableelectronically on the Citywebsite and paper copiesavailable in City office byApril 1, 2017. Publishnotice of availability onwebsite or localnewspaper.


Feb 15, 2018 Anticipatemaking draftreportavailable byFeb 15, 2018

Public notice posted onJanuary 24, 2018.

NotStarted

Make final Annual Reportavailable electronicallyon the City website andpaper copies available inCity Hall.


April 1, 2018 Anticipatecompletingby April 1,2018

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2.2 Describe any Public Involvement/Participation activities planned for the next year, if applicable.

· Continue to hold stormwater committee meetings regularly to review SMP implementation progress.· Continue to work with the Candlewood Lake Authority, the Lake Kenosia Commission, the Still River Alliance, Housatonic Valley Association, and other local and regional

organizations with environmental public involvement activities.· Provide public notice of annual report.

2.3 Public Involvement/Participation reporting metrics

Metrics Implemented Date Posted

Availability of the Stormwater Management Plan announced to public No

Availability of Annual Report announced to public Yes Jan 24, 2018 www.danbury-ct.gov/stormwatermanagement/

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3. Illicit Discharge Detection and Elimination (Section 6(a)(3) and Appendix B / page 22)

3.1 BMP Summary



Due

Date completedor projectedcompletiondate

Additional details

3-1 Develop writtenIDDE program

Inprogress

The City is in process ofcompleting written IDDEprogram using the CT IDDEprogram template.

Prepare IDDE Plan for theCity.

Public Works,Planning & ZoningDepartment andCorporationCounsel's Office

Jul 1, 2018 Anticipatecompleting byJuly 1, 2018.

3-2 Develop list andmaps of all MS4stormwater outfalls inpriority areas

InProgress

The City mapping includescatch basins with uniqueidentification numbers,pipes with pipe sizes, andCity-owned detentionbasins. The City has startedmapping catchmentdelineations.

Update CAD/GIS stormsystem mapping toinclude requiredelements listed on page24 of 50 and on pages 3& 4 in Appendix B of theGeneral Permit, includingcatchment delineations.

Public Works,Mapping-GIS

Jul 1, 2019 Anticipatecompleting byJan 1, 2019

InProgress

The City has started todevelop a list of stormwateroutfalls in municipality.

Develop a list (databaseor spreadsheet) ofstormwater outfalls inpriority areas.


Jul 1, 2019 Anticipatecompleting byJul 1, 2019

3-3 Implement citizenreporting program

Complete The City continues tomaintain their two methodsfor Citizen reporting: phonenumber on the PublicUtilities website forsubmitting a report of aByPass/SSO event and theCity Line 311 hotline.Information on the CityLine311 program is posted onthe City’s website and isincluded in the City’sDiscover Danbury AnnualReport available at City Hall.

Establish a citizenreporting hotline andadvertise it on the Citywebsite and in municipaloffices.

Public Works Jul 1, 2017 Jul 1, 2017 The City Line 311program includes acall center, livechat, and emailaddress to receivecitizens’ reports.

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Due


Additional details

3-4 Establish legalauthority to prohibitillicit discharges

InProgress

The City has drafted an IllicitDischarge Ordinance, whichis under review by legalcounsel.

Review City’s existingordinance related toillicit discharge and illegalconnection and revise, asnecessary.

Planning & ZoningDepartment,Public Utilities,CorporationCounsel's Office


3-5 Develop recordkeeping system forIDDE tracking

InProgress

The City currently usingtheir Sewer By-Pass TrackingLog for their IDDE trackingrecordkeeping system.The official IDDE trackingrecordkeeping system willbe modeled after the SewerBy-Pass Tracking Log.

Develop IDDE trackingrecordkeeping system.

Public Works Jul 1, 2017 Jul 1, 2018

3-6 Address IDDE inareas with pollutants ofconcern

NotStarted

Identify areas with highpotential for septicsystem failure.

Health and HumanServices, PublicWorks

Notspecified

Anticipatecompleting byJul 1, 2019

3-7 Conduct SSOinventory

Complete The City has prepared aSewer By-Pass Tracking Logand has been filling it out.

Identify areas with highpotential for septicsystem failure.

Health and HumanServices, PublicUtilities

- Jul 1, 2017 Reason for addition:Part of the IDDEProgram.

3-8 Assess and preparea priority ranking ofcatchments

InProgress

Public Works is aware of thehigh priority catchmentsand is working with the GISDepartment to documentthis information.

Classify each catchmentwithin priority areas intoan excluded, problem,high priority, or lowpriority catchment.


- Anticipatecompleting byOct 1, 2018

Reason for addition:Part of the IDDEProgram.

NotStarted

Rank catchments withineach category (exceptexcluded catchments)based on screeningfactors found on page 6& 7 in Appendix B of theGeneral Permit.


- Anticipatecompleting byJun 1, 2019


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Due


Additional details

3-9 Conduct outfall andinterconnectionscreening and sampling

InProgress

The City has distributed adry weather screening fieldsheet to staff for use duringdry weather screening andsampling.

Conduct dry weatherscreening and sampling(where flowing) of everyMS4 outfall andinterconnection (exceptfor excluded andProblem Catchments)

Public Works - Anticipatecompleting byJun 1, 2019


3-10 Conductcatchmentinvestigations andremove illicitdischarges

NotStarted

Evaluate catchments forSystem VulnerabilityFactors and begincatchmentinvestigations.



NotStarted

Where SystemVulnerability Factors arepresent, conductmanhole inspections.Isolate and verifysources. Removeidentified illicitdischarges and conductconfirmatory outfallscreening.



3.2 Describe any IDDE activities planned for the next year, if applicable.

· Complete and begin implementing written IDDE program.· Adopt Illicit Discharge Ordinance.· Evaluate catchments for System Vulnerability Factors, begin dry weather outfall screening, and begin catchment investigations.· Continue to map stormwater drainage structures and piping network.· Continue to maintain CityLine 311 phone, live chat, and email address hotline services to respond to illicit discharges.· Continue to track IDDE through Collection System By-Pass Tracking spreadsheet.

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3.3 List of citizen reports of suspected illicit discharges received during this reporting period.

Date of Report Location / suspected source Response taken

3/6/2017 11 Foster St High pressure jet and grease treatment (3/6/2017)5/27/2017 Main St High pressure jet and grease treatment (5/27/17)8/15/2017 12 Valley View Dr Jet/vac truck and root treatment (8/15/17)9/1/2017 5 Scuppo Rd Vac truck and service pumps (9/1/17)10/17/2017 Riverview Dr siphon Jet/vac truck and routine inspection (10/17/17)10/29/2017 Eighth Ave & White St Jet/vac truck and educate locally (10/29/17)

3.4 Provide a record of illicit discharges occurring during the reporting period and SSOs occurring July 2012 through end of reporting period using thefollowing table.*

Location(Lat long/ streetcrossing /address andreceiving water)

Date andduration ofoccurrence

Dischargeto MS4 orsurfacewater

Estimatedvolumeby-passed

Estimatedvolumedischarged

Known orsuspected cause /Responsible party

Corrective measures planned and completed(include dates)

Samplingdata (ifapplicable)

High Ridge Rd atScuppo Rd

1/5/2017 No 100 Gal 0 Gal Grease High pressure jet and grease treatment (1/4/17) N/A

1 Eighth Ave 1/21/2017 No 10,500 Gal 0 Gal Pipe Failure ByPass pumping and repaired piped (2/21/17) N/A11 Foster St 3/6/2017 No 8,500 Gal 0 Gal Grease High pressure jet and grease treatment. (3/6/17) N/AMain St 5/27/2017 No 500 Gal 0 Gal Grease High pressure jet and grease treatment (5/27/17) N/A155 Deer Hill Ave 6/6/2017 No 30 Gal 0 Gal Roots Jet/vac truck and root treatment (6/6/17) N/A12 Valley View Dr 8/15/2017 No 150 Gal 0 Gal Roots Jet/vac truck and root treatment (8/15/17) N/A5 Scuppo Rd 9/1/2017 Catch Basin 50 Gal 50 Gal Mechanical Failure Vac truck and service pumps (9/1/17) N/APadanaram Rd & Rt 37 10/2/2017 No 400 Gal 0 Gal Construction

DamagePlug main to repair (10/2/17) N/A

Sleepy Hollow Dr 10/3/2017 RetentionPond

500 Gal 0 Gal Roots Cut and treat roots (10/3/17) N/A

Riverview Dr siphon 10/17/2017 Still River 350 Gal 0 Gal Paper Products Jet/vac truck and routine inspection (10/17/17) N/AEighth Ave & White St 10/29/2017 No 500 Gal 0 Gal Rags Jet/vac truck and educate locally (10/29/17) N/A

*See attached Collection System By-Pass Event/Complaint Tracking Logs for sanitary sewer overflows occurring in 2012-2016.

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3.5 Briefly describe the method used to track illicit discharge reports, responses to those reports, and who was responsible for tracking this information.

Illicit discharge reports are tracked through CityLine 311 and the Utilities Phone Number. Reports are sent to the Director of Public Works. DPW investigates any reportsreceived and if illicit discharges are found. DPW works with Land Use, the Town Sanitarian, and Code Enforcement to eliminate the discharge.

3.6 Provide a summary of actions taken to address septic failures using the table below.

Location and nature of structure with failing septic systems Actions taken to respond to and address the failures Impacted waterbody or watershed, if known

None Reported

3.7 IDDE reporting metrics

Metrics

Estimated or actual number of MS4 outfalls 1,355

Estimated or actual number of interconnections Estimated 50

Outfall mapping complete 70%

Interconnection mapping complete 70%

System-wide mapping complete (detailed MS4 infrastructure) 70%

Outfall assessment and priority ranking 0%

Dry weather screening of all High and Low priority outfalls complete 0%

Catchment investigations complete 1,007

Estimated percentage of MS4 catchment area investigated 10%

3.8 Briefly describe the IDDE training for employees involved in carrying out IDDE tasks including what type of training is provided and how often isit given (minimum once per year).

IDDE-specific training was not provided during the reporting period. IDDE topics will be incorporated into the City’s annual stormwater training program.

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4. Construction Site Runoff Control (Section 6(a)(4) / page 25)

4.1 BMP Summary



Due


Additional details

4-1 Implement, upgrade,and enforce land useregulations or otherlegal authority to meetrequirements of MS4general permit

Not Started Review and update, asnecessary, existing landuse regulations andimplementation policiesfor compliance with theMS4 General Permitconstruction sitestormwater runoffcontrol requirements.

Planning & ZoningDepartment


4-2 Develop/Implementplan forinterdepartmentalcoordination in site planreview and approval

Complete The City follows theinterdepartmentalcoordinationprocedures asdescribed in Section5.2 of the SWMP.

Continue to implementinterdepartmentalcoordinationprocedures as describedin Section 5.2 of theSWMP.

Department ofPermitCoordination

Jul 1, 2017 Jul 1, 2017

4-3 Review site plans forstormwater qualityconcerns

Complete/Ongoing The City conducts planreviews for all projectssubject to the land useregulations listed inBMP 4-1.

Complete site planreviews for all projectssubject to the land useregulations listed initem 4-1.

Planning & ZoningDepartment,EnvironmentalImpactCommission

Jul 1, 2017 Jul 1, 2017

4-4 Conduct siteinspections

Complete/Ongoing The City conductsinspections andenforcement to assessand ensure theadequacy of theinstallation,maintenance,operation, and repairof construction andpost-constructioncontrol measures.

Conduct inspectionsand enforcement toassess and ensure theadequacy of theinstallation,maintenance,operation, and repair ofconstruction and post-construction controlmeasures.

HealthDepartment (asstaff contact forEIC)

Jul 1, 2017 Jul 1, 2017

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Due


Additional details

4-5 Implementprocedure to allowpublic comment on sitedevelopment

Complete The City continues topost notice of both theCity Line 311 hotlineand the Public UtilitiesByPass/SSO eventphone number forstormwater relatedcomments on themunicipal stormwaterwebsite.

Post notices ofDanbury’s 'hotline' forstormwater relatedcomments on themunicipal stormwaterwebsite.

Public Works andHealthDepartment (asstaff contact forEIC)

Jul 1, 2017 Jul 1, 2017

4-6 Implementprocedure to notifydevelopers about DEEPconstructionstormwater permit

Complete The City continues toinform developers /contractors of theirpotential obligation toregister under theDEEP constructiongeneral permit and toprovide a copy of theStorm Water PollutionControl Plan toDanbury upon request.

Continue to informdevelopers/contractorsof their potentialobligation to registerunder the DEEPconstruction generalpermit and to provide acopy of the StormWater Pollution ControlPlan to Danbury uponrequest.

Public Works andHealthDepartment (asstaff contact forEIC)

Jul 1, 2017 Jul 1, 2017

4.2 Describe any Construction Site Runoff Control activities planned for the next year, if applicable.

· Begin the process of reviewing existing land use regulations to determine whether updates are required.· Continue interdepartmental coordination in plan review through Department of Coordination.· Continue to review site plans and conduct construction site inspections.· Continue to document the number (per permit year) of construction plan submittals, construction startups, and construction inspections and report these numbers in

the annual report.

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5. Post-construction Stormwater Management (Section 6(a)(5) / page 27)

5.1 BMP Summary



Due


Additional details

5-1 Establish and/orupdate legal authorityand guidelines regardingLID and runoff reductionin site developmentplanning

NotStarted

Review and update, asnecessary, existing land useregulations andimplementation policies(including TechnicalStandards) for compliancewith the General Permitpost-constructionstormwater managementrequirements.

Planning & ZoningDepartment,Engineering,CorporationCounsel's Officeand HealthDepartment (asstaff contact forEIC)

Jul 1, 2021 Anticipatecompletingby Jul 1,2021

5-2 Enforce LID/runoffreduction requirementsfor development andredevelopment projects

NotStarted

Review and update, asnecessary, currentregulations to identify,reduce, or eliminateexisting regulatory barriersto implementation of LIDand runoff reductionpractices.

Planning & ZoningDepartment,Engineering


NotStarted

Complete plan reviews andensure compliance for allprojects subject to the legalauthority and/or guidelineslisted in item 5-1.

Planning & ZoningDepartment,Engineering


5-3 Identify retention /detention ponds, raingardens, and oil-gritseparators in priorityareas

Complete The City has identifiedall City-ownedstormwater basins andtreatment systems forfuture maintenance andhas included them inthe City’s mapping.

Identify stormwater basinsand treatment systems inpriority areas and includethem in GIS/CAD mapping.


Jul 1, 2019 Dec 27, 2017

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Due


Additional details

5-4 Implement long-termmaintenance plan forstormwater basins andtreatment structures

InProgress

The City is in the processof drafting a preliminaryplan and inspectionform for maintenance ofretention/detentionbasins and rain gardens.

Develop a long-termmaintenance plan forretention/detention basinsand stormwater treatmentstructures.

Public Works Jul 1, 2019 Anticipatecompletingby Jul 1,2019

NotStarted

Implement maintenanceplan including annualinspection of retention /detention basins andstormwater treatmentstructures and removal ofaccumulated sediment andpollutants.

Public Works Jul 1, 2019 Anticipatecompletingby Jul 1,2019

5-5 DCIA mapping NotStarted

Calculate the DirectlyConnected Impervious Area(DCIA) of outfall catchmentareas using guidanceprovided by DEEP andUConn CLEAR.

Engineering,Planning & ZoningDepartment,Mapping-GIS


NotStarted

Revise DCIA estimate asdevelopment,redevelopment, or retrofitprojects effectively add orremove DCIA.

Engineering,Planning & ZoningDepartment,Mapping-GIS


5-6 Address post-construction issues inareas with pollutants ofconcern

NotStarted

Address erosion andsediment problems notedduring inspectionsconducted under Item 5-3through the retrofitprogram developed underItem 6-7.

Public Works Notspecified

Anticipatecompletingby Jun 1,2020

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5.2 Describe any Post-Construction Stormwater Management activities planned for the next year, if applicable.· Begin the process of reviewing and updating existing land use regulations and policies with the assistance of a consultant.· Develop estimates of DCIA with the assistance of a consultant.

5.3 Post-Construction Stormwater Management reporting metrics

Metrics

Baseline (2012) Directly Connected Impervious Area (DCIA) Not yet determinedDCIA disconnected (redevelopment plus retrofits) Not yet determined

Retrofits completed 0

DCIA disconnected 0%Estimated cost of retrofits Not yet determinedDetention / retention ponds, oil-grit separators, and rain gardens identified 13

5.4 Briefly describe the method to be used to determine baseline DCIA.

DCIA will be estimated from high-resolution impervious cover and land use/cover data available from UConn NEMO and empirical equations (Sutherland Equations) relatingDCIA and Total Impervious Area (TIA). The DCIA estimates will be developed at the CTDEEP Local Basin scale.

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6. Pollution Prevention/Good Housekeeping (Section 6(a)(6) / page 31)

6.1 BMP Summary



Due


Additional details

6-1 Develop/implementformal employee trainingprogram

Complete The City continues tomaintain their existingemployee training program.

Implement trainingprogram for Cityemployees, building onthe City’s currentprogram (see topicslisted in Section 7.2).


6-2 Implement MS4property and operationsmaintenance

InProgress

The City is determining whatmeasures can be taken toimprove their turf/fertilizermanagement BMPs.

Implementturf/fertilizermanagement BMPs forparks and open space.

Public Works Jul 1, 2018 Anticipatecompleting byJul 1, 2018

InProgress

The City continues to installand maintain educationalsignage. Public Works iscurrently investigatingadditional ways to addresspet waste.

Implement pet wasteeducation program.


Complete Signage has been installed atKenosia Park and RogersPark Pond asking the publicto not feed waterfowl.Vegetated buffers have beenplanted at Kenosia Park todeter waterfowl. TheDirector of Parks andRecreation discharges ablank fire arm atCandlewood Lake Park dailyduring the summer todisperse congregatingwaterfowl.

Implement waterfowlmanagement BMPs intargeted areas.


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Due


Additional details

6-2 Implement MS4property and operationsmaintenance(Continued)

Complete An SPCC Plan was preparedfor the High School datedJune 29, 2016.

Evaluate municipalbuildings and facilitiesfor spill prevention andpollution preventionpractices andimplement additionalBMPs as necessary.


InProgress

Public Works has begunevaluating municipal vehicleand equipment parking,fueling and maintenancepractices.

Evaluate and modify, asnecessary, municipalvehicle and equipmentparking, fueling, andmaintenance practices.


Complete The City continued toimplement a leafmanagement program.

Continue current leafmanagement program.


6-3 Implementcoordination withinterconnected MS4s

NotStarted

Coordinate withneighboringmunicipalities,institutions, and DOTregarding stormwatermanagement programactivities associatedwith the adjacentMS4s.



6-4 Develop/implementprogram to control othersources of pollutants tothe MS4

Complete The City continues to controlsources of pollution to theMS4 through the existingthrough IDDE program,water quality monitoring, theCity’s ordinances related toillicit discharge and illegalconnection, and targetededucation and outreach tocommercial, industrial,municipal, institutional

Control through IDDEprogram, water qualitymonitoring, the City’sordinances related toillicit discharge andillegal connection, andtargeted education andoutreach tocommercial, industrial,municipal, institutionalfacilities


Jul 1, 2017

19



Due


Additional details

facilities owners/operators owners/operators (seeBMP 1-1).

6-5 Evaluate additionalmeasures for discharges toimpaired waters*

InProgress

The additional measureslisted in Section 7.2 of theSWMP have been evaluatedand are in progress, such asinfrastructure repair,rehabilitation and retrofit(see BMP 6-7).

Implement themeasures andprocedures describedin Section 7.2 of theSWMP including thosemeasures to addressstormwater pollutantsof concern.



6-6 Track projects thatdisconnect DCIA

NotStarted

Annually track totalacreage of DCIA that isdisconnected as aresult ofredevelopment orretrofits (see BMPs 5-4and 6-7)

Public Works,Planning &Zoning

Jul 1, 2017 Annuallystarting in2018

6-7 Implementinfrastructure repair/rehabprogram

InProgress

The City replaced 1,900 LF ofstormwater piping. Theyalso replaced/repaired 133catch basins, 4 culverts, and2 head walls.

Repair, rehabilitate, orretrofit MS4infrastructure (e.g.,conveyances,structures, outfalls) asneeded in a timelymanner.


6-8 Develop/implementplan to identify/prioritizeretrofit projects

NotStarted

Develop retrofit planand list of priority sites.


6-9 Implement retrofitprojects to disconnect 2%of DCIA

NotStarted

Disconnect 1% per yearof Danbury’s DCIA fromthe MS4.


20



Due


Additional details

6-10 Develop/implementstreet sweeping program

Complete The City continues to inspectand sweep all municipally-owned or –operated streetsand parking lots.

Continue to inspect andsweep all municipally-owned or –operatedstreets and parkinglots.


6-10 Develop/implementstreet sweeping program(Continued)

NotStarted

Evaluate runoffreduction measuressuch as permeablepavement or othermeasures to promotesheet flow ofstormwater for all newand redevelopedmunicipal parking lots

Public Works - Anticipatecompleting byJul 1, 2019

6-11 Develop/implementcatch basin cleaningprogram

InProgress

The City has inspected 108and cleaned 1,007 out of11,440 catch basins in 2017.

Inspect and clean catchbasins as necessary.


NotStarted

Develop a plan foroptimizing catch basincleaning (i.e., reducedfrequency in certainareas) based oninspection findings,such that no catchbasin is more than 50%full.


6-12 Develop/implementsnow managementpractices

Complete The City has adopted a salt-only management program.

Implement practices fordeicing materialmanagement and snowand ice control.


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6.2 Describe any Pollution Prevention/Good Housekeeping activities planned for the next year, if applicable.

· Continue to document pertinent maintenance/cleaning operations.· Maintain a list of complaints received regarding road and highway maintenance concerns.· Continue to conduct employee training. Add IDDE topics to employee training.· Continue to inspect the maintenance garage monthly and maintain records of each inspection.· Inspect catch basins when they are cleaned and document the inspection findings.

6.3 Pollution Prevention/ Good Housekeeping reporting metrics

Metrics

Employee training provided for key staff Not in year 2017Street sweeping

Curb miles swept 247 milesVolume (or mass) of material collected 1,785 yards

Catch basin cleaningTotal catch basins in priority areas 85%Total catch basins in MS4 11,440Catch basins inspected 108Catch basins cleaned 1,007Volume (or mass) of material removed from all catch basins 1,970 yardsVolume removed from catch basins to impaired waters (if known) Unknown

Snow managementType(s) of deicing material used Salt onlyTotal amount of each deicing material applied 9,700 tonsType(s) of deicing equipment used Plow trucksLane-miles treated 240 milesSnow disposal location Edge of pavementStaff training provided on application methods & equipment No

Municipal turf management program actions (for permittee properties in basins with N/Pimpairments)

Reduction in application of fertilizers (since start of permit) 0%Reduction in turf area (since start of permit) 0%

Lands with high potential to contribute bacteria (dog parks, parks with open water, & sites withfailing septic systems)

Cost of mitigation actions/retrofits Not yet determined

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6.4 Catch basin cleaning program

Briefly describe the method used to optimize your catch basin inspection and cleaning schedule. [Complete this section for the 2017 Annual Report only]

Public Works has cleaned 1,007 of the City’s 11,440 catch basins and will clean the remaining 10,433 catch basins over the next three years. During cleaning, DPW staffmember will inspect each basin, log the condition of the basin and whether any repairs are needed, and estimate the amount of material removed during cleaning. When allbasins have been cleaned (over a period of 3 years), the City will produce a list of basins that will require more frequent future cleaning and the basins that need less frequentcleaning. That information will be used to inform an optimal future schedule for catch basin inspection and cleaning.

6.5 Retrofit program

Briefly describe the Retrofit Program identification and prioritization process, the projects selected for implementation, the rationale for the selection of those projectsand the total DCIA to be disconnected upon completion of each project. [Provide information if available in 2017 report. Section to be completed for the 2019 AnnualReport.]

N/A

Describe plans for continuing the Retrofit program and how to achieve a goal of 1% DCIA disconnection in future years. [Provide information if available in 2017 report.Section to be completed for the 2019 Annual Report.]

N/A

Describe plans for continuing the Retrofit program beyond this permit term with the goal to disconnect 1% DCIA annually over the next 5 years. [Provide information ifavailable in 2017 report. Section to be completed for the 2019 Annual Report.]

N/A

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Part II: Impaired waters investigation and monitoring [This section required beginning with 2018Annual Report]

1. Impaired waters investigation and monitoring program

1.1 Indicate which stormwater pollutant(s) of concern occur(s) in your municipality or institution. This data is availableon the MS4 map viewer: http://s.uconn.edu/ctms4map.

Nitrogen/ Phosphorus Bacteria Mercury Other Pollutant of Concern

1.2 Describe program status.

2. Screening data for outfalls to impaired waterbodies (Section 6(i)(1) / page 41)

2.1 Screening data collected under 2017 permit

Complete the table below for any outfalls screened during the reporting period. Each Annual Report will add on tothe previous year’s screening data showing a cumulative list of outfall screening data.

Outfall ID Sampledate

Parameter(Nitrogen,Phosphorus, Bacteria,or Other pollutant ofconcern)

ResultsName ofLaboratory (ifused)

Follow-up required?

2.2 Credit for screening data collected under 2004 permit

If any outfalls to impaired waters were sampled under the 2004 MS4 permit, that data can count towards themonitoring requirements under the modified 2017 MS4 permit. Complete the table below to record sampling datafor any outfalls to impaired waters under the 2004 MS4 permit.

Discuss 1) the status of monitoring work completed, 2) a summary of the results and any notable findings, and 3) any changes to theStormwater Management Plan based on monitoring results.

http://www.nemo.uconn.edu/ms4

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Outfall Sampledate

Parameter (Nitrogen,Phosphorus, Bacteria, orOther pollutant of concern)

Results Name ofLaboratory (ifused)

Follow-up required?

3. Follow-up investigations (Section 6(i)(1)(D) / page 43)

Provide the following information for outfalls exceeding the pollutant threshold.

Outfall Status of drainage area investigation Control measure implementation toaddress impairment

4. Prioritized outfall monitoring (Section 6(i)(1)(D) / page 43)

Once outfall screening has been completed for at least 50% of outfalls to impaired waters, identify 6 of the highestcontributors of any pollutants of concern. Begin monitoring these outfalls on an annual basis by July 1, 2020.

Outfall Sample Date Parameter(s) Results Name of Laboratory (if used)

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Part III: Additional IDDE Program Data [This section required beginning with 2018 Annual Report]

1. Assessment and Priority Ranking of Catchments data (Appendix B (A)(7)(c) / page 5)

Provide a list of all catchments with ranking results (DEEP basins may be used instead of manual catchment delineations).

1. Catchment ID(DEEP Basin ID) 2. Category 3. Rank

2. Outfall and Interconnection Screening and Sampling data (Appendix B (A)(7)(d) / page 7)

2.1 Dry weather screening and sampling data from outfalls and interconnections

Provide sample data for outfalls where flow is observed. Only include Pollutant of concern data for outfalls that discharge into stormwater impairedwaterbodies.

Outfall /InterconnectionID

Screening/ sampledate

Ammonia Chlorine Conductivity Salinity E. coli orenterococcus Surfactants Water

TempPollutantof concern

If required, follow-up actionstaken

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2.2 Wet weather sample and inspection data

Provide sample data for outfalls and key junction manholes of any catchment area with at least one System Vulnerability Factor.

Outfall /InterconnectionID

Sampledate Ammonia Chlorine Conductivity Salinity E. coli or

Enterococcus Surfactants Water Temp Pollutant of concern

3. Catchment Investigation data (Appendix B (A)(7)(e) / page 9)

3.1 System Vulnerability Factor Summary

For those catchments being investigated for illicit discharges (i.e. categorized as high priority, low priority, or problem) document the presence or absence ofSystem Vulnerability Factors (SVF). If present, report which SVF’s were identified. An example is provided below.

OutfallID

Receiving Water System Vulnerability Factors

Where SVFs are:

1. History of SSOs, including, but not limited to, those resulting from wet weather, high water table, or fat/oil/grease blockages.2. Sewer pump/lift stations, siphons, or known sanitary sewer restrictions where power/equipment failures or blockages could readily result in SSOs.3. Inadequate sanitary sewer level of service (LOS) resulting in regular surcharging, customer back-ups, or frequent customer complaints.4. Common or twin-invert manholes serving storm and sanitary sewer alignments.5. Common trench construction serving both storm and sanitary sewer alignments.6. Crossings of storm and sanitary sewer alignments.7. Sanitary sewer alignments known or suspected to have been constructed with an underdrain system;

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8. Sanitary sewer infrastructure defects such as leaking service laterals, cracked, broken, or offset sanitary infrastructure, directly piped connections between storm drain andsanitary sewer infrastructure, or other vulnerability factors identified through Inflow/Infiltration Analyses, Sanitary Sewer Evaluation Surveys, or other infrastructureinvestigations.

9. Areas formerly served by combined sewer systems.10. Any sanitary sewer and storm drain infrastructure greater than 40 years old in medium and densely developed areas.11. Widespread code-required septic system upgrades required at property transfers (indicative of inadequate soils, water table separation, or other physical constraints of the

area rather that poor owner maintenance).12. History of multiple local health department or sanitarian actions addressing widespread septic system failures (indicative of inadequate soils, water table separation, or

other physical constraints of the area rather that poor owner maintenance).

3.2 Key junction manhole dry weather screening and sampling data

Key JunctionManholeID

Screening /Sample date

Visual/ olfactoryevidence of illicitdischarge

Ammonia Chlorine Surfactants

3.3 Wet weather investigation outfall sampling data

OutfallID Sample date Ammonia Chlorine Surfactants

3.4 Data for each illicit discharge source confirmed through the catchment investigation procedure

Dischargelocation

Sourcelocation Discharge description Method of

discoveryDate ofdiscovery

Date ofelimination

Mitigation or enforcement action Estimatedvolume of flowremoved

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Part IV: Certification

“I have personally examined and am familiar with the information submitted in this document and all attachmentsthereto, and I certify that, based on reasonable investigation, including my inquiry of those individuals responsible forobtaining the information, the submitted information is true, accurate and complete to the best of my knowledge andbelief. I understand that a false statement made in this document or its attachments may be punishable as a criminaloffense, in accordance with Section 22a-6 of the Connecticut General Statutes, pursuant to Section 53a-157b of theConnecticut General Statutes, and in accordance with any other applicable statute.”

Chief Elected Official or Principal Executive Officer Document Prepared by

Print name: Print name:

Signature / Date: Signature / Date:

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