Combined Sewer Overflow Long Term Control Plan Public Meeting #2 - PowerPoint PPT Presentation

Bronx River Combined Sewer Overflow Long Term Control Plan Public Meeting #2 Review of Alternatives Casita Maria Center for Arts and Education May 7, 2015

Welcome & Introductions Eric Landau Associate Commissioner DEP 2

LTCP Process and Public Involvement Alternatives Review Meeting Bronx Borough Data Review Meeting River LTCP Due Community Board 2 River Keeper & Bronx River President Meeting Keeper & Bronx River Alliance 4/1/15 Alliance 6/30/15 1/22/15 2/9/15 5/5/15 Existing Data Alternatives Information Collection & Modeling Development LTCP DEC Review Review Analysis & Evaluation Final Plan Alternatives Kickoff Review Meeting Meeting Meeting TODAY 2/12/15 TBD ONGOING PUBLIC/STAKEHOLDER INPUT 3

Public Comments Bronx River Alliance:  Bronx River has enjoyed steady improvements and has an active constituency of users, making water quality a priority for this waterbody  Public Comments: • Control CSOs and address upstream issues • Making river safe for primary contact is long term goal • Consider alternatives that make the river safe for primary contact throughout the entire year and as soon as possible after a rain event 4

Bronx River Sections WESTCHESTER BRONX QUEENS BROOKLYN STATEN ISLAND Freshwater Section E. Tremont Ave Tidal Section 5

Freshwater Section – Current Uses  Boat Access Points (Contains kayak/canoe launch site) 219 th Street (Shoelace Park) 1 Forth Knox 2 1 Kazmiroff Blvd WILLIAMSBRIDGE 3  Portages 2 (Re-access points to get around river obstructions) BEDFORD Stone Mill – Botanical Garden OLINVILLE A PARK Twin Dams – Bronx Zoo B 3 C River Park Dam A FORDHAM BELMONT B VAN NEST EAST TREMONT C Twin Dams – Bronx Zoo River Park Dam 6

Tidal Section – Current Uses  Parks & Boat Access Points (Contains kayak/canoe launch site) EAST TREMONT VAN NEST 4 West Farms Rapids 4 Starlight Park 5 WEST FARMS Concrete Plant Park 6 Hunts Point Riverside Park 7 5 8 Soundview Park  Upcoming Development 6 SOUNDVIEW Hunts Point Vision Plan 7 Soundview Park 8 HUNTS POINT 7

Sampling and Modeling Jim Mueller, P.E. Assistant Commissioner DEP 8

Bronx River Drainage Area  Annual Wet-Weather Discharge Volume:  ~1,950 MGal (typical year) • ~26% CSO • ~74% Direct Drainage and Stormwater  Fresh Water Section:  No CSO Outfalls  6 MS4 Outfalls ( )  Primarily direct drainage  Tidal Section: E Tremont Ave  5 CSO Outfalls ( )  No MS4 Outfalls NYC Westchester Drainage Area 4,318 23,020 (Acres) Served by 64% N/A Combined Sewers 9

Bronx River Classifications CLASS C WESTCHESTER BRONX B a t h i n g / F i s h i n g Westchester QUEENS BROOKLYN STATEN ISLAND Freshwater Section CLASS B B a t h i n g New York City E. Tremont Ave CLASS I Tidal B o a t i n g / F i s h i n g Section New York City 10

Current Water Quality Standards Focusing only on the New York City portion of the Bronx River : Bacteria Dissolved Oxygen Section Class (mg/L) Fecal Coliform Total Coliform (col/100 mL) (col/100 mL) ≤ 2,400 Freshwater never less than 4.0 (Monthly Median) ≤ 200 Class B NORTH of and daily average > 5.0 (Monthly GM) E. Tremont Ave. 80% ≤ 5,000 Tidal ≤ 2,000* ≤ 10,000 SOUTH of ≥ 4.0 Class I E. Tremont Ave. (Monthly GM) (Monthly GM) *Note: New DEC proposed rulemaking for primary contact criteria for Class I and Class SD of ≤ 200 col/100 mL for Fecal Coliform. 11

Sampling Locations LTCP Sampling:  Outfall Pipe • 2 CSO (HP-007 & HP-009) • 2 Stormwater (HP-608, HP-627)  Bronx River • 10 Locations (1100+ analyses)  BR0 in Westchester County  BR1 at County line Botanical Gardens  BR2 - BR9 in NYC Citizen Sampling: E Tremont Ave  Bronx River Soundview • 3 Locations Near: Starlight Park  Botanical Gardens  Soundview Starlight Park Hunts Point  Hunts Point Riverside Park Riverside Park 12

Fecal Coliform Sampling Results - GMs May 17 th , 2014 to July 17 th , 2014 *BR0 county line bi-weekly sampling conducted outside LTCP sampling timeframe (7/25/2014 to 10/24/2014). Freshwater Tidal 10000 2000 #/100 ml 2631 2651 2232 2019 1763 1000 1543 701 Fecal Coliform (#/100 ml) 489 794 672 617 262 200 #/100 ml 200 #/100 ml Geometric Mean 223 future primary 220 180 contact standard 159 157 100 38 38 10 5 LTCP - Wet LTCP - Dry 1 0 1 2 3 4 5 6 7 8 9 10 *BR0 BR1 BR2 BR3 BR4 BR5 BR6 BR7 BR8 BR9 13 Sampling Locations

Enterococci Sampling Results - GMs May 17 th , 2014 to July 17 th , 2014 *BR0 county line bi-weekly sampling conducted outside LTCP sampling timeframe (7/25/2014 to 10/24/2014). Freshwater Tidal 10000 1000 Enterococci (#/100 ml) 931 876 684 616 Geometric Mean 496 315 391 139 100 110 98 77 30 #/100 ml 58 52 43 36 future primary 30 contact standard 16 10 13 9 LTCP - Wet LTCP - Dry 2 1 0 1 2 3 4 5 6 7 8 9 10 *BR0 BR1 BR2 BR3 BR4 BR5 BR6 BR7 BR8 BR9 14 Sampling Locations

DO Sampling Results – Averages May 17 th , 2014 to July 17 th , 2014 *BR0 county line bi-weekly sampling conducted outside LTCP sampling timeframe (7/25/2014 to 10/24/2014). No DO samples were collected. Freshwater Tidal 10 9 Dissolved Oxygen, mg/L 8 7.75 7.69 7.40 7.04 7.01 6.94 Averages 7 6.42 6.91 6.34 6.88 6.88 6.64 6.59 6.01 6.50 6 6.06 5.63 5 mg/L 5 5.02 4 mg/L 4 LTCP-Wet LTCP-Dry 3 *BR0 BR1 BR2 BR3 BR4 BR5 BR6 BR7 BR8 BR9 15 Sampling Locations

WQ Attainment Summary Based on Sampling Data Model Results: No difference in annual attainment between Baseline Water Quality Model and 100% CSO Control*. All 100% Seasonal Fecal (Monthly GM ≤ 200 col/100 ml) Output 83% to 100% Annual Fecal (Monthly GM ≤ 200 col/100 ml) 61% to 100% Annual Enterococcus (30- d rolling GM ≤ 30 col/100 ml) 93% to 100% Dissolved Oxygen (Never less than 4.0 mg/L) Assumptions: (Daily Average > 5.0 mg/L) • Westchester County flows are in attainment • 2008 rainfall year *Range based on results across 9 sampling locations (BR1 to BR9). 16

Water Quality Improvement Projects Green and Grey Infrastructure Mikelle Adgate Jim Mueller, P.E. Project Manager Assistant Commissioner DEP DEP 17

GI Projects in Bronx River Watershed Built Green Infrastructure:  23 bioswales and 8 stormwater greenstreets constructed to date in HP-008 and HP-009  Bronx River Houses - NYCHA  Shoelace Park - DPR Planned Projects: Flushing Creek  Area-Wide Contracts: • Design will begin in HP-002, HP- 004 and HP-007 in 2015  Partnership with TPL/SCA/DOE: • P.S. 129 (in construction)  Partnership with DPR: • Watson Gleason Playground  GI Grant Program: • ~$1 M renovation of a Bronx Zoo parking lot with rain gardens and porous paving 18

Grey Infrastructure Installed in Bronx River  Floatables Control  In-Line Netting Facilities at CSO Outfalls HP-004 & HP-009  Mechanical Screens at Regulators CSO27 & 27A  Floatables Boom by Concrete Park  CY2014: Bronx River had 415 cubic yard of floatables removed. Significant amount of tree branches.  Construction Cost ~ $47M Hunts Point WWTP  Completed in June 2012 19

Additional CSO Reduction Alternatives Evaluation Jim Mueller, P.E. Assistant Commissioner DEP 20

Modeled Bronx River CSO Volumes 600 508 500 Approx. 455 10% CSO Discharge Volume Reduction 400 (MGY) 300 454 413 200 100 2 1 41 32 11 0 9 Pre-WWFP LTCP Baseline w/ GI HP-004 HP-007 HP-008 HP-009 21

Alternatives Overview  Evaluate Alternatives for Bronx River Outfalls:  HP-009 Target Outfalls with Largest CSO  HP-007 HP-004 Discharges  HP-008  HP-004  Evaluate Floatables Control for HP-008 East River Outfall:  HP-011 Alternatives developed based on combinations of different technology options at target outfalls 22

HP-011 Bending Weir and Baffle  4-ft bending weir and baffle at Regulator 5 New Regulator Chamber with Baffle and 4-ft. Bending Weir Regulator 5 Bending Weirs HP-011 HP-011 – Bending Weir and Baffle Baffle 23

HP-009 Hydraulic Relief  Raise weir at Regulator 13  Relief pipe between Regulator 13 and Bronx River siphon HP-009 – Hydraulic Relief Raise Weir in Regulator 13 by 1 ft. HP-009 6-ft diam. Conduit from Regulator 13 to Existing 10x9 CS HP-010 Hydraulic Relief Siphon Twin 7-ft 24

HP-007 Hydraulic Relief HP-007 – Hydraulic Relief  5-ft diameter relief pipe Relief Structure  2,700 linear feet 27  Connect to existing combined sewer HP-007 5-ft Diameter Relief Pipe; 2,700 LF Connect to Existing Combined Sewer Hydraulic Relief 25

HP-007 Disinfection  Hypochlorite Dosing at Relief Structure 27A  Disinfection in 10 x 8 ft. Outfall Conduit  Disinfection in 9.25 x 8 ft. Combined Sewer HP-007 – Disinfection Relief Structure 27A Hypochlorite Dosing Locations Disinfection in 10 x 8 ft. Outfall Conduit Disinfection in 9.25 x 8 ft. Combined Sewer Disinfection HP-007 Relief Structure 27 HP-004 26