Middle St. Johns - Florida Department of Environmental Protection

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256 Water Quality Assessment Report: Middle St. Johns WBID 2893F Waterbody Segment Name St. Johns River Above Lake Jesup Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Stream 3F Nutrients (Current and Historic Chla) Proposed Status Verified List 2893F St. Johns River Above Lake Jesup Stream 3F Total Coliform Bacteria Not Impaired 2893F St. Johns River Stream 3F Turbidity Not 2 Above Lake Jesup Impaired 2893F St. Johns River Stream 3F Un-Ionized Not 2 Above Lake Jesup Ammonia Impaired 2893F1 Lake Cockran Lake 3F No Data 3a 2893H Mullet Lake Lake 3F Insufficient 3b Data 2893J Mud Lake Lake 3F No Data 3a 2922 Deep Creek Stream 3F Insufficient 3b Diversion Data 2922A Daytona Lake Lake 3F Nutrients (TSI) Not 2 Impaired 2925 Deep Creek - Lake Stream 3F Arsenic Not 2 Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Biology Not 2 Ashby Canal Impaired Integrated Report Category 1 Priority for TMDL Development Projected Year for TMDL Development Comments 3 (# Exceedances/ # Samples) PP= Planning Period VP= Verified Period 5 Medium 2008 Co-limitation of nitrogen and phosphorus based on a TN/TP median of 22 (178 values) in the PP and a median of 21 (149 values) in the VP. PP - 1 chla annual mean exceeded 20 ug/l (2000), 181 TN values, median 1.328 mg/L, 182 TP values, median 0.06 mg/L. VP - 2 chla annual means exceeded 20 ug/l (2000-2001), 152 TN values, median 1.364 mg/L, 152 TP values, median 0.07 mg/L. 4 consecutive years (1999-2002) in the verified period exceeded the historic value 4.98 ug/l (historic time block: 1992- 1996) by more than 50%. This historic chla value is based on new information not present in IWR2002 Run14.2. 2
Water Quality Assessment Report: Middle St. Johns 257 WBID Waterbody Segment Name Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status 2925 Deep Creek - Lake Stream 3F Cadmium Cadmium Verified Ashby Canal List 2925 Deep Creek - Lake Stream 3F Chromium3 Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Copper Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Dissolved Oxygen Planning Ashby Canal List 2925 Deep Creek - Lake Stream 3F Coliform Fecal Coliform Insufficient Ashby Canal Bacteria Bacteria Data 2925 Deep Creek - Lake Stream 3F Iron Iron Verified Ashby Canal List 2925 Deep Creek - Lake Stream 3F Lead Lead Verified Ashby Canal List 2925 Deep Creek - Lake Stream 3F Nickel Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Nutrients (Chla) Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Selenium Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Silver Silver Planning Ashby Canal List 2925 Deep Creek - Lake Stream 3F Coliform Total Coliform Insufficient Ashby Canal Bacteria Bacteria Data 2925 Deep Creek - Lake Stream 3F Turbidity Not Ashby Canal Impaired 2925 Deep Creek - Lake Stream 3F Un-Ionized Not Ashby Canal Ammonia Impaired 2925 Deep Creek - Lake Stream 3F Zinc Not Ashby Canal Impaired Comments 3 Integrated Priority Projected ment 2 ment 2 Report Category 1 for TMDL Year for TMDL (# Exceedances/ # Samples) PP= Planning Period VP= Verified Develop- Develop- Period 5 Low 2008 PP -7/40 values exceed criterion. VP - 7/34 values exceed criterion. 2 2 3c DO met verification threshold of IWR, but unable to identify causative pollutant. PP - 7/37 values below DO criterion. VP - 12/45 values below DO criterion. 45 TN values, median 1.15 mg/L. 45 TP values, median 0.08 mg/L. No BOD data. 3c (Low) (2008) PP - 1/7 values exceed criterion. VP - 0/3 values exceed criterion. 5 Low 2008 PP - 22/40 values exceed criterion. VP - 21/43 values exceed criterion. 5 Low 2008 PP - 12/27 values exceed criterion. VP -6/22 values exceed criterion. 2 2 2 PP - 5/32 values exceed criterion. VP - 5/34 values exceed criterion. 3c (Low) (2008) PP - 3/3 values exceed criterion. VP - 0/0 values exceed criterion. 3c (Low) (2008) PP - 0/0 values exceed criterion. VP - 0/5 values exceed criterion. 2 2 2
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FLORIDA DEPARTMENT OF ENVIRONMENTAL
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Middle St. Johns - Florida Department of Environmental Protection

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