Raritan River Basin Nutrient TMDL Study
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1 Raritan River Basin Nutrient TMDL Study Funded By: Rutgers University New Jersey EcoComplex On Behalf of: New Jersey Department of Environmental Protection Division of Watershed Management August 17, 2004 Presented by: James F. Cosgrove, Jr., P.E.
2 Outline of Presentation Basin Overview Key Issues Assessment of current impairments Other studies in Raritan Basin TMDL Study Description Sampling Overview Schedule
3 Raritan River Basin (See Separate Figure) SBRR 4-SL SBRR5-SLo Spruce Run Reserv oi r BvB1 SBRR6 Cakepo uli n Creek SBRR 3-SL i U CC1 SBRR 8 La ke 0 $ So lit ud e Beaver Brook SBR4 U SBRR2 SBR2 EBB1 SBR3 South Branch Raritan River Town of Clinto n STP SBRR 7 &V NJDC Yo uth C orrect ional Mount ainview S TP U SBRR9 ³ U Y U &V&V &V&V SBR1 ³ Washingto n Twp SA S chooley's Mt. STP Washington Twp SA Long Valley V illage STP LR3 NBRC1 SBRC 1-CLi RC1 South B Rockawa ranch Rock away Creek 0 Cushetunk U Round Valley La ke $ Re servoir SBRC2-CL Raritan Twp MUA STP Flemington Boro STP Neshan SBRR 1 Nort h Branch y Creek i c River AgCrop NR1 SBRC 3-CLo Hol Budd Lake Mt. Olive Twp Clover Hill Minor STP land Brook La mington River RLS A ST P HB1 D rakes B k LR4 Y U Y U Y NBRR2-RLi 0 Ravine Lake U $ Y Y U RR1 ³ OldUrb SBRR10 ³ AgPast NR2 Rural LR1 DkB1 IBB LR2 / IB1 BuB1 NBRR1 NBRR3-RL PeB1 NBRR5 LR5 Bra nch North NBRR6 Burnett B k Raritan Ri ver NBRR7 I ndia Bk EDC STP NBRR4-RLo MiB1 Millstone River Roxbury Twp Ajax Terrace Major ST P Me n dham Bor o STP Bern ar dsville SA STP Six M Run ile Rar itan SMR1 GB1 River Green Brook Mn B3-DLo St ony Broo k DB3-GPo UMR3 BBB3-GMPo Beden B roo k Princeton Me ad owss TP DB2-GP Carnegie Lake Mn B2-DL DB1-GPi $ Duherna l Lake Mn B1-DLi 0 CB3-PPo Gord on Pond 0 ³ $ Plainsboro 0 Pond CB1-PPi Devils U $ $ Grove rs Mill Pond 0 U UMR2 BBB2-GMP Big Bear B k CB2-PP East Windsor Twp MUA STP U BBB1-GMPi RB4 RB2-PL Bk Millstone Cranbury Ri ver Brook $ 0 DWW MB 2 BASE UMR1 MB 1 Mat chaponix Bk &V &V &V&V Mt B1 BaB1 Pine Bk Western Mon mouth U A Pine Brook S TP Hight st ow n AgWet STP MGB1 $ Weamac onk Lak e PB2 0 ³ WC3- WLo RB3-PLo / WC1-WL i WC2-WL MGBB RB1-PLi / Peddie Lake Rocky Bk Manalap an Brook MR B &V McGel lards Brook PB1
4 Basin Overview 1,100 square mile watershed area WMA 8 (470 sq. mi): North and South Branch Raritan WMA 9 (350 sq. mi): Mainstem Raritan and Lower Tributaries WMA 10 (280 sq. mi): Millstone River Over 80 wastewater treatment plant discharges providing point source loads Highly varying land uses providing nonpoint source loads
5 Key Issues Streams Impaired for Phosphorus and other parameters (303d List) TMDLs Required Must Determine Targets / Endpoints Where is phosphorus causing impairment? What phosphorus reduction would fix the problem? What is natural condition?
6 Existing phosphorus criteria STREAMS TP < 0.1 mg/l unless: it can be demonstrated that TP is not a limiting nutrient and TP will not otherwise render the waters unsuitable for designated uses. LAKES, PONDS, RESERVOIRS TP<0.05 mg/l except where watershed or site-specific criteria are developed
7 Existing nitrate criteria STREAMS AND LAKES NO 3 -N < 10 mg/l DRINKING WATER NO 3 -N < 10 mg/l
8 The New Phosphorus Policy for STP NJPDES Permits If stream phosphorus exceeds 0.1 mg/l, set effluent limit at 0.1 mg/l. If STP discharge will cause stream violation of 0.1 mg/l, set effluent limit to satisfy stream standard. OR Complete a study to demonstrate that phosphorus is not limiting and is not rendering the waters unsuitable for the designated uses. With minor additional data collection effort, data collected for this phosphorus study can often be utilized to complete a TMDL.
9 Determining Nutrient Limitation and Use Impairment Nutrient Limitation IF SRP > 0.05 mg/l OR TIN*/SRP < 5, THEN Phosphorus is NOT limiting *TIN = NO 2 + NO 3 + NH 3 Indicators of use impairment 1. Dissolved oxygen must not violate criteria due to diurnal swings 2. Phytoplankton concentration 24 µg/l chl-a seasonal mean OR 32 µg/l chl-a 2-week mean 3. Periphyton density 150 mg/m² chl-a seasonal mean OR 200 mg/m² chl-a single event
10 Raritan River Basin Total Phosphorus Assessment NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP Total Phosphorus Assessment Full Attainment Insufficient Data Non Attainment Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area Miles M a tchaponix B k. W Pi n M cgel lai r e B k. ds Bk N S E to Raritan Bay
11 Raritan River Basin Dissolved Oxygen Assessment NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP Dissolved Oxygen Assessment Full Attainment Insufficient Data NA Non Attainment Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area Miles M a tchaponix B k. W Pi n M cgel lai r e B k. ds Bk N S E to Raritan Bay
12 Raritan River Basin ph Assessment NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP ph Assessment Full Attainment Insufficient Data NA Non Attainment Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area Miles M a tchaponix B k. W M c Gel lai r Pi n e B k. ds Bk N S E to Raritan Bay
13 Raritan River Basin TSS Assessment NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP TSS Assessment Full Attainment Insufficient Data NA Non Attainment Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area Miles M a tchaponix B k. W Pi n M cgel lai r e B k. ds Bk N S E to Raritan Bay
14 Raritan River Basin Temperature Assessment NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP Temperature Assessment Full Attainment Insufficient Data NA Non Attainment Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area Miles M a tchaponix B k. W M c Gel lai r Pi n e B k. ds Bk N S E to Raritan Bay
15 Phosphorus Evaluation Studies in the Raritan Basin Pre-2000 (before NJDEP Protocol) Rockaway Creek and South Branch Raritan River 2000 to 2001 (before NJDEP Protocol) Beden Brook and Pike Brook 2003 Lower Millstone / Raritan River Watershed Included Beden Brook and Stony Brook 2004 Matchaponix Brook near Pine Brook South Branch Raritan River in Washington Twp. Purpose to determine the applicability of the instream phosphorus criterion Is phosphorus controlling algae and plant growth? Is phosphorus causing excessive productivity?
16 Raritan River Basin TSS Assessment 2003/2004 Phosphorus Evaluation Studies W N S E Previous/Current TP Evaluations NJPDES DSWs Major STP - Included in Study Minor STP - Included in Study Major STP Major STP - Application Pending Minor STP Study Areas North Branch Raritan River South Branch Raritan River Lower Raritan River Upper Millstone River Lower Millstone Matchaponix Brook Outside Study Area M a tchaponix B k. Pi n M cgel lai r e B k. ds Bk to Raritan Bay Miles
17 Millstone - Raritan Sampling Locations
18 BB1 - Beden Brook upstream SBRSA Hopewell STP 7/4/ 6 PM 7/5/ 6 AM 7/5/ 6 PM 7/6/ 6 AM 7/6/ 6 PM 7/7/ 6 AM 7/7/ 6 PM Dissolved Oxygen (mg/l) or ph (s.u.)' Temperature ( Celsius)' DO ph Temperature
19 BB2 - Beden Brook downstream SBRSA Hopewell STP 7/4/ 6 PM 7/5/ 6 AM 7/5/ 6 PM 7/6/ 6 AM 7/6/ 6 PM 7/7/ 6 AM 7/7/ 6 PM Dissolved Oxygen (mg/l) or ph (s.u.)' Temperature ( Celsius)' DO ph Temperature
20 M4 - Lower Millstone River downstream Montgomery Stage II STP 7/4/ 6 PM 7/5/ 6 AM 7/5/ 6 PM 7/6/ 6 AM 7/6/ 6 PM 7/7/ 6 AM 7/7/ 6 PM Dissolved Oxygen (mg/l) or ph (s.u.)' Temperature ( Celsius)' DO ph Temperature
21 water column algae chl-a (µg/l) BB1 BB2 BB3 M1 M2 M3 M4 M5 M6 M7 MRB R1 R2 R3 R4 SB1 SB2 SB3 Maximum 2-week Mean Seasonal Mean
22 Beden Brook attached algae 7/30/2003 6/30/2003 7/30/2003 8/21/2003 9/11/ /2/2003 6/30/2003 7/30/2003 8/21/2003 9/11/ /2/2003 6/30/2003 7/30/2003 8/21/2003 9/11/ /2/2003 MRB BB1 BB2 BB3 chlorophyll-a (mg/m²)
23 Summary of Conclusions from Lower Millstone / Raritan River Study Phosphorus stream criterion applies and is exceeded: Upper Millstone River (upstream Carnegie Lake) Lower Stony Brook (downstream Honey Branch) Beden Brook Phosphorus stream criterion does not apply Upper Stony Brook (upstream Honey Branch) Lower Millstone River (downstream Carnegie Lake) Raritan River segment around SRVSA Report is still under review by NJDEP
24 Raritan River Basin TMDL Study Overview Identify nutrient impairments and critical locations e.g. Carnegie Lake identified in 2003 study Develop, calibrate and verify watershed models Models relate nutrient sources to water quality targets at critical locations Calculate TMDLs (WLAs, LAs, MoS, RC)
25 Extensive Monitoring Program in 2004 Monitoring Objectives Identify nutrient impairments and critical locations Assess nature and cause of other conventional impairments (DO, ph, TSS, temperature) Develop, calibrate and verify watershed models
26 Monitoring Networks Streams and in-line Lakes 32 Stream Stations 9 Lake Inlet Stations 9 Lake Stations 9 Lake Outlet Stations 6 Tributary Stations 9 Baseflow Stations 6 Stormwater Stations 13 STP Stations all major municipal DSWs and selected minor
27 Agriculture - Pasture
28 Stream Monitoring Events 3 Low-flow Events (2 days 77 stations (including 12 STPs) 3 High-flow Events (2 days 69 stations (including 13 STPs) 8 Ambient 41 stations 3 Diurnal 41 stations 3 Stormwater 6 stations
29 Monitoring Parameters In Situ ph, temperature, dissolved oxygen, flow (stream and STP) Diurnal 41 stream and lake locations Laboratory P-series, N-series, TDS, TSS, alkalinity, CBOD 5 (stream and STP) Chlorophyll-a (phytoplankton and periphyton), iron, and turbidity (stream only)
30 UMR3 - Upper Millstone River downstream of railroad crossing in Plainsboro 7/2 6 AM 7/3 6 AM 7/4 6 AM 7/5 6 AM 7/6 6 AM 7/7 6 AM 7/8 6 AM 7/9 6 AM 7/10 6 AM Dissolved Oxygen (mg/l) or ph (s.u Temperature ( Celsius ph Dissolved Oxygen Grab DO Grab ph Temperature Grab Temp.
31 Watershed Assessment Total Phosphorus evaluation Evaluate phosphorus limitation using nutrient chemistry Evaluate use impairment using diurnal dissolved oxygen, phytoplankton, and periphyton Identify critical locations Establish water quality targets with existing data Identify additional studies needed Assess nature and cause of other conventional impairments (DO, ph, TSS, temperature)
32 Watershed Modeling Purpose To relate point and nonpoint sources to water quality targets Components Flow model (stream, runoff, base) Stream quality Runoff and baseflow quality GIS framework and interface
33 TMDL Calculations Develop WLAs (for point sources) and LAs (for nonpoint sources) to satisfy water quality targets at critical locations
34 Schedule (Planned before the rain began) Monitoring June to November 2004 Assessment October 2004 to January 2005 Modeling August 2004 to February 2005 TMDL Calculations January 2005 to March 2005 Final Report May 2005
35 Questions
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