Total Maximum Daily Load for Dissolved Oxygen in the Grand River, Red Cedar River, and Tributaries
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DRAFT Total Maximum Daily Load for Dissolved Oxygen in the Grand River, Red Cedar River, and Tributaries Ingham, Eaton, and Clinton Counties Michigan Department of Environmental Quality Water Resources Division June 2013 TABLE OF CONTENTS EXECUTIVE SUMMARY .............................................................................................................. v 1.0 INTRODUCTION ................................................................................................................... 1 1.1 Problem Statement ......................................................................................................... 2 1.2 Background .................................................................................................................... 2 1.3 Numeric Target ............................................................................................................... 5 2.0 DATA DISCUSSION .............................................................................................................. 6 2.1 Instantaneous (Grab) DO Measurements ...................................................................... 8 2.2 Continuous Sonde Data ................................................................................................. 9 3.0 LINKAGE ANALYSIS ............................................................................................................ 9 4.0 SOURCE ASSESSMENT ..................................................................................................... 11 4.1 NPDES Discharges ..................................................................................................... 12 4.2. Nonpoint Sources ....................................................................................................... 14 5.0 GRRC MODEL DEVELOPMENT ......................................................................................... 15 5.1 Data Used in the GRRC Model ................................................................................... 16 5.2 Selection of Low Flow Critical Period .......................................................................... 16 5.3 Current Loading .......................................................................................................... 16 5.4 Loading Scenarios ...................................................................................................... 17 6.0 LCs AND LAs ...................................................................................................................... 17 6.1. WLA ............................................................................................................................ 18 6.2 LA ................................................................................................................................ 19 6.3 Summary of Allocations .............................................................................................. 20 6.4. MOS ............................................................................................................................ 22 6.5 Seasonality ................................................................................................................. 22 7.0 REASONABLE ASSURANCE ............................................................................................ 22 7.1 NPDES Permits ........................................................................................................... 22 7.2 Nonpoint Sources ........................................................................................................ 25 8.0 IMPLEMENTATION RECOMMENDATIONS ...................................................................... 28 9.0 FUTURE MONITORING ...................................................................................................... 29 10.0 PUBLIC PARTICIPATION .................................................................................................. 30 11.0 REFERENCES ................................................................................................................... 31 ii TABLES Table 1: Grand River and Red Cedar River DO grab sampling and continuous 2012 monitoring locations ................................................................................................ 34 Table 2: Grand River a.m. and p.m. grab sampling results, August 31, 2010 ....................... 35 Table 3: Red Cedar River a.m. and p.m. grab sampling results, September 1, 2010 ........... 35 Table 4: Grand River and Red Cedar River a.m. and p.m. grab sampling results, September 2, 2010 .................................................................................................. 36 Table 5: Red Cedar River a.m. and p.m. grab sampling results, September 8, 2010 ........... 36 Table 6: Red Cedar River a.m. and p.m. grab sampling results, August 6, 2012 ................. 37 Table 7: Grand River a.m. and p.m. grab sampling results, August 7, 2012 ......................... 37 Table 8: Red Cedar River a.m. and p.m. grab sampling results, August 14, 2012 ............... 38 Table 9: Grand River a.m. and p.m. grab sampling results, August 15, 2012 ....................... 38 Table 10: Summary of point sources of conventional pollutants to the Grand River and Red Cedar River near Lansing ......................................................................... 39 Table 11: DMR data. Municipal discharges to the Grand River near Lansing, August 2012 ............................................................................................................ 39 Table 12: DMR data. Municipal discharge to the Red Cedar River near Lansing, August 2012 ............................................................................................................ 39 Table 13: Point source permits for the TMDL area.................................................................. 40 Table 14: Diurnal value in the Grand River at Webster Road over the 2012 GRRC Study, August 1-11, 2012 ............................................................................ 43 Table 15: Diurnal value in the Red Cedar River at River Point Park over the 2012 GRRC study, August 1-15, 2012 ............................................................................. 43 FIGURES Figure 1: ......... Original TMDL reach ............................................................................................... 44 Figure 2: ......... Modified (impaired) TMDL reach ............................................................................. 45 Figure 3: ......... Upper Grand River watershed source area/GRRC TMDL area .............................. 46 Figure 4: ......... 2012 GRRC TMDL area and river reach ................................................................. 47 Figure 5: ......... Landcover dataset for the GRRC TMDL area ......................................................... 48 Figure 6: ......... Grand River grab sampling site locations ................................................................ 49 Figure 7: ......... Red Cedar River grab sampling site locations ........................................................ 50 Figure 8: ......... DO and temperature at RMPs on the Grand River, August 7, 2012 ....................... 50 Figure 9: ......... DO and temperature at RMPs on the Grand River, August 15, 2012 ..................... 51 Figure 10: ....... DO and temperature at RMPs on the Red Cedar River, August 6, 2012 ................ 51 Figure 11: ....... DO and temperature at RMPs on the Red Cedar River, August 14, 2012 .............. 51 Figure 12: ....... Trend DO and temperature data for 2001, 2010, and 2012 .................................... 52 Figure 13: ....... Trend grab sampling data in the Grand River ......................................................... 52 Figure 14: ....... Webster Road 24-hour continuous sonde data for the 2012 GRRC study .............. 53 Figure 15: ....... River Point Park 24-hour continuous sonde data for the 2012 GRRC study ........... 53 Figure 16: ....... NPDES permits in the GRRC TMDL watershed ...................................................... 54 Figure 17: ....... CSOs in the GRRC TMDL watershed ..................................................................... 54 Figure 18: ....... CAFO permits in the GRRC TMDL watershed ........................................................ 55 Figure 19: ....... Sewered versus unsewered in the GRRC TMDL watershed .................................. 55 Figure 20: ....... Percent impervious soils in the GRRC TMDL watershed ........................................ 56 Figure 21: ....... Biosolids in the GRRC TMDL watershed ................................................................ 57 iii ACRONYMS AUID Assessment Unit Identification AWT Advanced Waste Treatment BMP Best Management Practices BOD Biochemical Oxygen Demand BWL Board of Water and Light CAFO Concentrated Animal Feeding Operation CBOD Carbonaceous Biological Oxygen Demand CFR Code of Federal Regulations cfs Cubic Feet Per Second CNMP Comprehensive Nutrient Management Plan COC Certificate of Coverage CSO Combined Sewer Overflows DMR Discharge Monitoring Report DO Dissolved Oxygen GRRC Grand River/Red Cedar IDEP Illicit Discharge Elimination Program LA Load Allocation LC Loading Capacity LLWFA Landscape Level Wetland Functional Assessment L-THIA Long-Term Hydrologic Impact Assessment MDEQ Michigan Department of Environmental Quality MDOT Michigan Department of Transportation mg/l Milligrams Per Liter MGD Million Gallons Per Day MHP Mobile Home Park MOS Margin of Safety