Middle St. Johns - Florida Department of Environmental Protection

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346 Water Quality Assessment Report: Middle St. Johns WBID Waterbody Segment Name Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status 2987 Little Wekiva River Stream 3F Nutrients Nutrients (Chla) Not Impaired 2987 Little Wekiva River Stream 3F Selenium Not Impaired 2987 Little Wekiva River Stream 3F Coliform Total Coliform Verified Bacteria Bacteria List 2987 Little Wekiva River Stream 3F Turbidity Not Impaired 2987 Little Wekiva River Stream 3F Un-Ionized Not Ammonia Impaired 2987 Little Wekiva River Stream 3F Zinc Not Impaired Integrated Report Category 1 Priority for TMDL Development Projected Year for TMDL Development Comments 3 (# Exceedances/ # Samples) PP= Planning Period VP= Verified Period 2 Delist. PP - 0 chla annual means exceeded 20 ug/l. 47 chla values, mean 5.31 ug/l, range 0 - 67.2 ug/l. VP - 0 chla annual means exceeded 20 ug/l. 41 chla values, mean 5.80 ug/l, range 0.01 - 67.2 ug/l. The annual chla mean concentrations were: 1994-6.3 ug/l, 1995-4.0 ug/l, 1996-13.2 ug/l, 1997-8.6 mg/l, 1998-5.6 ug/l, 1999-7.2 ug/l, 2000- 4.8 ug/l, 2001-8.4 ug/l, and 2002- 18.6 ug/l. 270 TN values, median 0.97 mg/l. 270 TP values, median 0.14 mg/l. 2 5 Low 2008 PP - 9/33 values exceed criterion. VP - 5/24 values exceed criterion. Coliform median 2000 colonies/100ml, range 120 - 24,000 colonies/100ml. No more than 5 values per month. 2 2 2
Water Quality Assessment Report: Middle St. Johns 347 WBID Waterbody Segment Name Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status 2987A Spring Lake Lake 3F Nutrients (TSI) Verified List 2987B Little Wekiva Nw Ave T Stream 3F Biology Planning List 2987X Starbuck Spring Stream 3F Insufficient Data 2987Y Palm Springs Stream 3F Insufficient 3b Data 2987Z Sanlando Spring Stream 3F Insufficient 3b Data 2989 Mill Creek Stream 3F No Data 3a 2993 Lake Prevatt Lake 3F Dissolved Dissolved Oxygen Planning Oxygen List 2993 Lake Prevatt Lake 3F Coliform Bacteria Fecal Coliform Bacteria Not 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 Phosphorus limited based on a TN/TP median of 37 (228 values) in the PP and a median of 37 (230 values) in the VP. PP - 6 TSI annual means exceeded 60 (1995- 2000). VP - 7 TSI annual means exceeded 60 (1996-2002). 261 TN values, median 1.53 mg/L, mean 1.55 mg/L. 275 TP values, median 0.041 mg/L, mean 0.04 mg/L. 3c Biology does not meet verification threshold of IWR due to insufficient data in verified period. 3b 3c (Low) (2008) DO does not meet verification threshold of IWR due to insufficient data in verified period. PP - 12/26 values below DO criterion, VP - 9/11 values below DO criterion. 2 This segment is being delisted because there were sufficient data for the planning list assessment. PP - 2/20 values exceed criterion, range 2.0 - 620 colonies/100ml. VP - 1/5 values exceed criterion, range 6.0 - 540 colonies/100ml.
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FLORIDA DEPARTMENT OF ENVIRONMENTAL
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Middle St. Johns - Florida Department of Environmental Protection

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