Stormwater Management Plan
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STORMWATER MANAGEMENT PLAN TOWN OF MANCHESTER PREPARED BY: ADAM G. FOX SENIOR PROJECT ENGINEER JOSEPH MAGDOL, P.E. SENIOR PROJECT MANAGER Submitted to: Submitted by: Mr. Jeff LaMalva, P.E. HRP Associates, Inc. Assistant Town Engineer Engineering & Geology Town of Manchester 167 New Britain Avenue P.O. Box 191 Plainville, Connecticut Manchester, CT 06045-0191 J:\MANTO\MAN3000.MC\Stormwater Management Plan.doc TABLE OF CONTENTS Section Page Key Definitions ......................................................................................................................... i Acronyms ................................................................................................................................iii INTRODUCTION ....................................................................................................................1 A. Background ..................................................................................................................1 B. Qualifying Local Program............................................................................................. 2 C. Qualifying State Programs ........................................................................................... 2 D. Communications .......................................................................................................... 3 E. Urbanized Areas.......................................................................................................... 3 F. Town Wetlands............................................................................................................ 3 G. Connecticut’s Water Quality Standards ....................................................................... 5 1.0 MCM #1 – PUBLIC EDUCATION AND OUTREACH .................................................. 7 1.1 MCM #1 Requirements .................................................................................... 7 1.2 Best Management Practices ............................................................................ 7 1.2.1 Webpage Development......................................................................... 7 1.2.2 Educational Materials............................................................................ 8 1.2.3 Stormwater Education Program for School Children ............................ 8 2.0 MCM #2 – PUBLIC PARTICIPATION/INVOLVEMENT............................................. 10 2.1 MCM #2 Requirements .................................................................................. 10 2.2 Best Management Practices .......................................................................... 10 2.2.1 Public Comment.................................................................................. 10 2.2.2 Public Participation.............................................................................. 10 2.2.3 River/Pond Clean-up Days.................................................................. 11 3.0 MCM #3 – ILLICIT DISCHARGE DETECTION AND ELIMINATION......................... 12 3.1 MCM #3 Requirements .................................................................................. 12 3.1.1 Urbanized Area Requirements............................................................ 12 3.1.2 Town Wide Requirements................................................................... 12 3.2 Best Management Practices .......................................................................... 13 3.2.1 Revise Town Sewer Ordinances......................................................... 13 3.2.2 Stormwater Discharge Mapping.......................................................... 13 3.2.3 Dry Weather Discharge Inspection ..................................................... 13 3.2.4 Dry Weather Inspection Follow-ups .................................................... 14 4.0 MCM #4 – CONSTRUCTION SITE RUNOFF CONTROL ........................................ 15 4.1 MCM #4 Requirements .................................................................................. 15 4.2 Best Management Practices .......................................................................... 15 4.2.1 Ordinance/Regulation Revisions......................................................... 15 4.2.2 Enforcement........................................................................................ 16 4.2.3 Receipt of Public Information .............................................................. 16 J:\MANTO\MAN3000.MC\Stormwater Management Plan.doc TABLE OF CONTENTS (continued) Section Page 5.0 MCM #5 – POST-CONSTRUCTION RUNOFF CONTROL ...................................... 18 5.1 MCM #5 Requirements .................................................................................. 18 5.2 Best Management Practices .......................................................................... 18 6.0 MCM #6 – POLLUTION PREVENTION/GOOD HOUSEKEEPING........................... 19 6.1 MCM #6 Requirements .................................................................................. 19 6.2 Best Management Practices .......................................................................... 19 6.2.1 Municipal Employee Training .............................................................. 19 6.2.2 Street Sweeping Plan.......................................................................... 20 6.2.3 Catch Basin Cleaning Program........................................................... 20 6.2.4 Stormwater Conveyance System Upgrades ....................................... 21 7.0 MONITORING PLAN................................................................................................. 22 7.1 Parameters to be Monitored........................................................................... 22 7.2 Sampling Locations ........................................................................................ 22 7.3 Stormwater Monitoring Procedures................................................................ 23 7.4 Other Discharge Requirements...................................................................... 23 8.0 PLAN AMENDMENT, REPORTING AND RECORDKEEPING................................. 24 8.1 Amendments to Plan ...................................................................................... 24 8.2 Retention of Records...................................................................................... 24 8.3 Reporting Requirements ................................................................................ 24 LIST OF TABLES 1 SURFACE WATER QUALITY CLASSIFICATIONS ............................................pg. 5 2 IMPAIRED WATER BODIES................................................................................pg. 5 3 STORMWATER MONITORING PARAMETERS................................................pg. 25 4 STORMWATER SAMPLING LOCATIONS ........................................................pg. 25 LIST OF FIGURES 1 Urbanized Area Map.............................................................................................pg. 4 LIST OF APPENDICES A General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems B Stormwater General Permit Registration C Stormwater Monitoring Procedures J:\MANTO\MAN3000.MC\Stormwater Management Plan.doc KEY DEFINITIONS “Authorized activity” means any activity authorized under this general permit. “Best Management Practices (BMP)” means those practices, which reduce pollution and which have been determined by the Commissioner to be acceptable based on, but not limited to, technical, economic, and institutional feasibility. “Coastal area” means coastal area as defined in Section 22a-94 of the Connecticut General Statutes. “Coastal waters” means coastal waters as defined in Section 22a-93 of the Connecticut General Statutes. “Department” means the Department of Environmental Protection. “Fresh-tidal wetland” means a tidal wetland with an annual average salinity of less than 0.5 parts per thousand. “Guidelines” means the Connecticut Guidelines for Soil Erosion and Sediment Control, as amended, established pursuant to Section 22a-328 of the Connecticut General Statutes. “High tide line” means high tide line as defined in Section 22a-359(c) of the Connecticut General Statutes. “Illicit Discharge” means any unpermitted discharge to waters of the state that does not consist entirely of stormwater or uncontaminated ground water except those discharges identified in Section 3(a)(2) of this general permit when such non-stormwater discharges are approved, in writing, by the Commissioner as discharges that are not significant contributors of pollution to a discharge from an identified MS4. “Individual permit” means a permit issued to a named permittee under Section 22a-430 of the Connecticut General Statutes. “Inland wetland” means wetlands as that term is defined in Section 22a-38 of the Connecticut General Statutes. “Municipal separate storm sewer system (MS4)” means conveyances for stormwater, including, but not limited to, roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels or storm drains owned or operated by any municipality, State agency or Federal agency and discharging directly to surface waters of the state. “Permittee” means any municipality, that initiates, creates originates or maintains a discharge authorized by this general permit and that has filed a registration pursuant to Section 4 of this permit. “Point Source” means any discernible, confined and discrete conveyance, including but not limited to, any