Middle St. Johns - Florida Department of Environmental Protection

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292 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 2990 Salt Creek Stream 3F Nutrients (Chla) Verified List 2990 Salt Creek Stream 3F Turbidity Not Impaired 2990 Salt Creek Stream 3F Un-Ionized Not Ammonia Impaired 2992 Sweetwater Creek Stream 3F Biology Planning List 2992 Sweetwater Creek Stream 3F Dissolved Oxygen Verified List 2992 Sweetwater Creek Stream 3F Iron Not Impaired 2992 Sweetwater Creek Stream 3F Nutrients (Chla) Not Impaired 2992 Sweetwater Creek Stream 3F Turbidity Not Impaired 2992 Sweetwater Creek Stream 3F Un-Ionized Not Ammonia Impaired 2994A Gee Creek Stream 3F Biology 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 Nitrogen limited based on a TN/TP median of 8 (97 values) in the PP and a median of 8 (75 values) in the VP. PP - 1 chla annual mean exceeded 20 ug/l (1998). VP - 1 chla annual mean exceeded 20 ug/l (1998). 75 TN values, median 1.71 mg/L. 97 TP values, median 0.21 mg/L. 2 2 3c Biology met verification threshold, but need to identify causative pollutant. 1 failed bioassessment (SCI) in 1997. 5 Medium 2008 PP - 88/100 values below DO criterion. VP - 74/93 values below DO criterion. DO met verification threshold of IWR and phosphorus is causative pollutant (TP median = 0.31 mg/L). 158 DO values, median 3.2 mg/L, mean 3.47 mg/L, range 0.15 - 9.71 mg/L. The dominant landuse in this area is wetlands (47%). 2 2 2 2 2
Water Quality Assessment Report: Middle St. Johns 293 WBID Waterbody Segment Name Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status 2994A Gee Creek Stream 3F Cadmium Not Impaired 2994A Gee Creek Stream 3F Copper Not Impaired 2994A Gee Creek Stream 3F Dissolved Oxygen Not Impaired 2994A Gee Creek Stream 3F Coliform Fecal Coliform Planning Bacteria Bacteria List 2994A Gee Creek Stream 3F Iron Not Impaired 2994A Gee Creek Stream 3F Lead Lead Planning List 2994A Gee Creek Stream 3F Nickel Not Impaired 2994A Gee Creek Stream 3F Nutrients Nutrients (Chla) Not Impaired 2994A Gee Creek Stream 3F Coliform Bacteria Total Coliform Bacteria Insufficient Data 2994A Gee Creek Stream 3F Turbidity Not Impaired 2994A Gee Creek Stream 3F Un-Ionized Not Ammonia Impaired 2994A Gee Creek Stream 3F Zinc Not Impaired Integrated Report Category 1 2 2 2 Priority for TMDL Development 2 Projected Comments 3 Year for TMDL Development Period 2 (# Exceedances/ # Samples) PP= Planning Period VP= Verified 3c (Low) (2008) PP - 7/12 values exceed criterion. VP - 8/14 values exceed criterion. 2 3c (Low) (2008) PP - 4/20 values exceed criterion. VP - 0/16 values exceed criterion. 2 2 Delist. PP - 0 chla annual means exceeded 20 ug/l, 429 chla values, range of chla values 0 - 24.7 ug/L, mean chla over entire period 3.49 ug/L. VP - 0 chla annual means exceeded 20 ug/l, 279 chla values, range of chla values 0 - 24.7 ug/L, mean chla over entire period 3.76 ug/L. The annual mean chla concentrations were: 1992-3.1 ug/l, 1994-3.7 ug/l, 1995-3.1 ug/l, 1996- 3.8 ug/l, 1997-3.4 ug/l, 1998-6.1 ug/l, and 1999-3.5 ug/l. 98 TN values, median 0.91 mg/l. 98 TP values, median 0.12 mg/l. 3c (Low) (2008) PP - 0/1 values exceed criterion. VP - 2/12 values exceed criterion. 2 2 2
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Middle St. Johns - Florida Department of Environmental Protection

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