Newtown Creek Combined Sewer Overflow Long Term Control Plan Public Data Review Meeting Location: Newtown Creek Visitor Center Date: February 21, 2017
Objective Focus today is to present the water quality data collected , and to get your thoughts on issues to be addressed in Newtown Creek. The data shows Newtown Creek has: elevated bacteria levels excursions below WQS for Dissolved Oxygen slow time to recovery 2
Agenda 1 Introduction 2 CSO Sampling, Monitoring, and Model Calibration 3 Water Quality Sampling and Model Calibration 4 Newtown Creek Alliance / Riverkeeper / Citizen Sampling 5 CSO Baseline Modeling 6 CSO Control Preliminary Alternatives 3
1 Introduction 4
Newtown Creek Overview 5 Urban CSO BB-026 BB-040 BB-009 BB-013 BB-014 Tributaries BB-042 BB-015 BB-043 Dutch Kills BB-010 BB-049 NCQ-021 • Dutch Kills BB-004 NCQ-023 NCQ-022 • Whale Creek Whale Creek BB-012 • English Kills Newtown Creek BB-011 WWTP • East Branch • Maspeth Creek NCQ-029 21 CSO Outfalls 4 Major Outfalls Maspeth Creek • BB-026 NCQ-077 • NCQ-077 East Branch • NCB-083 • NCB-015 English Kills NCB-019 NCB-083 NCB-015 CSO Outfall 5
Drainage Area by WWTP Drainage Areas: Citywide Drainage Area ≈ 300,000 acres Newtown Creek WWTP 15,033 acres Bowery Bay WWTP 14,928 acres Portion that Drains to Newtown Creek 7,442 acres 4950 acres (67%) is served 0 1.7 3.4 miles by combined sewers 6
Drainage Area and Land Use Queens LEGEND Residential Mixed Residential and Commercial Commercial and Office Industrial and Manufacturing Transportation and Utility Public Facilities and Institutions Open Space and Outdoor Recreation Newtown Creek Parking Facilities Vacant Land Residential 37% Commercial 7% Industrial & Transportation 24% Public Facilities 5% Brooklyn Park & Open Space 22% Other 6% 7
Water Quality Standards & LTCP Goals CLASS SD CLASS SD F i s h S u r v i v a l F i s h S u r v i v a l The best usage of Class SD water is fishing . These waters shall be suitable for fish, shellfish, and The best usage of Class SD water is fishing . These waters shall be suitable for fish, shellfish, and wildlife survival. In addition, the water quality shall be suitable for primary and secondary contact wildlife survival. In addition, the water quality shall be suitable for primary and secondary contact recreation, although other factors may limit the use for these purposes. recreation, although other factors may limit the use for these purposes. DEC Water Quality Parameter Parameter Criteria* Reference Monthly Geometric Mean • New York Codes, Rules and Regulations Fecal Coliform ≤ 200 col/100 mL • (NYCRR Part 703.4) Monthly Geometric Mean • New York Codes, Rules and Regulations ≤ 2,400 col/100 mL Total Coliform • (NYCRR Part 703.4) 80% ≤ 5,000 col/100 mL ≥ 3.0 mg/L • New York Codes, Rules and Regulations Dissolved Oxygen (acute, never less than) • (NYCRR Part 703.3) * EPA has also proposed a potential future RWQC for enterococcus: 30-Day Rolling GM ≤ 30 col/100 mL. CSO LTCP Goals and Targets: Seasonal Bacteria Compliance Annual Dissolved Oxygen Compliance Time to Recovery for Bacteria of < 24 hours Floatables Control 8
Overview of Sampling Locations NCA 06 NCA 07 Dutch Kills NCA 05 Whale NCA 03 NCA 04 Creek Maspeth NCA 02 Creek NCA 08 NCA 01 East English Kills Branch Third Party Data Newtown Creek Alliance Riverkeeper Citizen Testing 9
Overview of Sampling Programs LTCP Sampling: CSO MS4 Receiving HSM SM SOD Data • Water • Sonde • • Sampling 9/19 - 10/27 7/29 - 10/27 7/15 - 11/3 1/4 - 11/1 1/22 - 11/2 7/26 - 10/1 7/1 - 8/12 Period Locations • 4 • 2 • 14 • 5 • 4 • 6 • 3 Events • 3 wet • 3 wet • Four 4-day • Monthly/ • Quarterly • 3 Wet • 60 Days events Weekly • 1 Dry Continuous Parameters • Fecal • Fecal • Fecal • Fecal • Fecal • SOD • DO • Entero • Entero • Entero • Entero • YSI • YSI • YSI • YSI 3 rd Party Sampling: NC Alliance Riverkeeper Citizen Sampling • April-October • May-October • May-October Period Locations • 8 • 3 • 1 Events • 40 • 6 • 16 Parameters • Entero • Entero • Entero • DO 10
2 CSO Sampling, Monitoring, and Model Calibration 11
CSO and MS4 Sampling Locations CSO Outfall MS4 Outfall Rainfall Event Statistics: Rainfall Rainfall Event Rainfall Event Rain Date Depth* Duration* Peak Intensity* Event (in) (hr) (in/hr) 1 7/29/16 1.00 6 0.70 2 9/19/16 0.78 6 0.23 3 9/30/16 0.39 12 0.08 4 10/27/16 1.32 12 0.32 12 *Based on LGA Weather Station
CSO Sampling Results Fecal Entero Rain CSO Outfall Event GM Range GM Range Min: 33,000 Min: 210,000 188,806 413,567 2 Max: 3,300,000 Max: 1,400,000 BB-026 670,000 1 560,000 1 3 n/a 1 n/a 1 Min: 210,000 Min: 120,000 327,914 213,803 4 Max: 800,000 Max: 430,000 Min: 59,000 Min:170,000 349,537 379,802 2 Max: 4,600,000 Max: 1,800,000 NCQ-077 780,000 1 520,000 1 3 n/a 1 n/a 1 4 n/a 2 n/a 2 n/a 2 n/a 2 Min: 300,000 Min:310,000 655,564 560,942 2 Max: 1,600,000 Max: 2,100,000 NCB-083 3 no overflow no overflow no overflow no overflow Min: 490,000 Min: 270,000 596,581 353,526 4 Max: 900,000 Max: 650,000 Note: No overflows were observed at CSO Outfall 1) Only one sample collected due to closed tide gate 2) Hazardous site/traffic conditions – unable to collect samples NCB-015 during rain events #2, 3, and 4. 13
MS4 Sampling Results Fecal Entero Rain CSO Outfall Event GM Range GM Range Min: 20,000 Min: 60,000 1 37,433 132,035 Max: 60,000 Max: 200,000 NCB-631 Min: 7,300 Min: 32,000 4 13,708 41,035 Max: 25,000 Max: 63,000 Min: 20,000 Min: 64,000 2 23,153 108,136 Max: 30,000 Max: 230,000 NCB-629 Min: 17,000 Min: 53,000 4 25,854 66,828 Max: 44,000 Max: 80,000 14
Landside Model Calibration DEP’s process for flow monitoring and modeling has been nationally peer reviewed and published DEP implemented that process to update and validate its Newtown Creek sewer system model based upon: • Field surveys and record drawings of physical structures. • A validation dataset based upon a 12-month sewer-monitoring program and extensive data analyses. • Data was analyzed using WaPUG approved methodologies and showed very good correlation. Schematic of Major Features of Landside Model 15
Flow Monitoring Program Flow Metering Period: March 28, 2014 – March 27, 2015 Flow Meter Locations/Configuration: Depth/Velocity Receiving Inclinometer? Rain Events Outfall Regulator Measurement Water Body Monitored Locations • Influent • Underflow BBL ‐ 026 L ‐ 4 Dutch Kills Yes 115 • Regulator • Overflow NCQ-077 Q-1 Maspeth Creek • Overflow No 119 • Influent NCQ-029 Q-2 Newtown Creek • Regulator No 119 • Overflow • Influent St. Nicholas NCB-083 East Branch • Regulator No 115 Weir • Overflow • Influent NCB-015 B-1 English Kills Yes 116 • Overflow 16
Sample Flow Data for BBL-026 Measured Measured GARR GARR Measured Measured MODEL MODEL Measured Measured MODEL MODEL 17
Comparisons of Predicted vs. Measured Volume Outfall BB-026 Outfall NC-029 Outfall NC-083 Outfall NC-015 18
Comparisons of Model vs. Meters Rainfall Statistics CSO Overflow Events CSO Duration (hr) CSO Volume (MG) CSO Outfall Flow Flow Flow Events Duration Depth % % % Meter Model Meter Model Meter Model (hr) (in) Difference Difference Difference Data Data Data BBL-026 115 871 52.71 38 34 -11% 247 225 -9% 153 144 -6% NCB-029 119 868 52.06 48 41 -15% 287 246 -14% 21 25 +17% NCB-083 115 851 52.68 51 50 -2% 277 282 +2% 440 535 +22% NCB-015 116 852 52.66 24 27 +13% 78 135 +73% 331 356 +8% Note: Flow meter data at Outfall NCQ-077 was not valid due to tidal impacts, turbulence and unrealistically high Doppler velocities. 19
3 Water Quality Sampling and Model Calibration 20
Fecal and Entero Sampling Locations BB-026 NC1 NC6 NC4 Dutch Kills NC3 NC5 NC3 S12 Whale NC7 Creek E2 NC2 NC8 NC2 NC9 Maspeth S80 Creek NC1 NC10 NCQ-077 NC11 East Branch S14 English S13 NC13 Kills NC12 NC0 LTCP2 NC14 NCB-083 HSM SM Major CSO Outfall NCB-015 21
Overview of Fecal and Entero Geomeans • LTCP: ~77 Wet samples per location; Jul – Nov 2016 • HSM: ~34 Wet samples per location; Jan – Nov 2016 Fecal – Wet Weather Entero – Wet Weather 0-30 61-110 >110 31-60 22
Fecal Coliform Sampling Results Outfall Outfall Outfall Outfall NCB-015 BB-026 NCB-077 NCB-083 1000000 100000 BB6 Fecal Coliform, cfu/100 mL 20,213 13,991 10000 8,882 7,791 6,821 6,668 BB7 3,451 3,538 2,840 2,331 1,960 1,325 1,377 1,322 1,164 1000 736 599 521 459 357 245 233 208 159 Fecal WQS 127 100 GM ≤ 200 cfu/100mL 67 30 22 10 1 (East River) (Dutch Kills) (Maspeth Creek) (East Branch) (English Kills) January 1, 2016 – November 3, 2016 Highlighted stations are directly LTCP2: ~ 14 Dry and 77 Wet weather samples per location downstream of a major CSO Outfall HSM: ~ 18 Dry and 34 Wet weather samples per location SM: ~ 2 Dry and 2 Wet weather samples per location 23
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