Middle St. Johns - Florida Department of Environmental Protection

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342 Water Quality Assessment Report: Middle St. Johns WBID 2956C 2956C Waterbody Segment Name Wekiva Spring (Orange) Wekiva Spring (Orange) Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status Stream 3F Nutrients Nutrients (Chla) Not Impaired Stream 3F Coliform Bacteria Total Coliform Bacteria Not Impaired 2956C Wekiva Spring (Orange) Stream 3F Turbidity Not Impaired 2956C Wekiva Spring Stream 3F Un-Ionized Not 2 (Orange) Ammonia Impaired 2956E Sand Lake Lake 3F Nutrients (TSI) Not 2 Impaired 2956F Lake Brantley Lake 3F Nutrients (TSI) Not 2 Impaired 2956X Sweetwater Creek Lake 3F Biology Not 2 Impaired 2956Z Miami Spring Stream 3F Insufficient 3b Data 2960 Messant Spring Stream 3F No Data 3a 2961 Lake Sylvan Lake 3F Biology Not 2 Impaired 2961 Lake Sylvan Lake 3F Nutrients (TSI) Not 2 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 (1994 & 1996), 35 chla values, range of chla values 0 - 16.3 ug/L, mean chla over entire period 1.37 ug/L. VP - 0 chla annual means exceeded 20 ug/l (1996), 5 chla values, range 0 - 3.5 ug/L, mean chla over entire period 1.72 ug/L. The annual mean chla concentrations for 1994 was 0.28 ug/l and for 1996 was 1.28 ug/l. 13 TN values, median 1.31 mg/l. 13 TP values, 0.07 mg/l. 2 This segment is being delisted because there were sufficient data for the planning list assessment. PP - 0/11 values exceed criterion, range 4-81 colonies/100 ml. VP - 0/5 values exceed criterion, range 4-81 colonies/100 ml. 2
Water Quality Assessment Report: Middle St. Johns 343 WBID Waterbody Segment Name Waterbody Type Waterbody Class 1998 303(d) Parameters of Concern Parameters Identified Using the IWR Proposed Status 2961A Lake Sylvan Outlet Lake 3F No Data 3a 2965 Bear Pond Outlet Stream 3F No Data 3a 2965A Bear Pond Lake 3F No Data 3a 2967 Rock Springs Run Stream 3F Biology Not Impaired 2 2967 Rock Springs Run Stream 3F BOD BOD Planning List 2967 Rock Springs Run Stream 3F Dissolved Oxygen Dissolved Oxygen Planning List 2967 Rock Springs Run Stream 3F Coliform Bacteria Fecal Coliform Bacteria Planning List 2967 Rock Springs Run Stream 3F Nutrients Nutrients (Chla) Not Impaired 2967 Rock Springs Run Stream 3F Coliform Bacteria Total Coliform Bacteria Planning List 2967 Rock Springs Run Stream 3F Turbidity Not Impaired Integrated Report Category 1 Priority for TMDL Development 2 Projected Comments 3 Year for TMDL Development Period 2 (# Exceedances/ # Samples) PP= Planning Period VP= Verified 3c (High) (2004) 30 BOD values, median 2.0 mg/L, range 1.0 - 8.7 mg/L. DO meets verification threshold. 3c (High) (2004) DO met verification threshold of IWR, but need to identify causative pollutant. PP - 14/35 values below DO criterion. VP - 8/25 values below DO criterion. 25 TN, median 1.3 mg/l. 30 BOD, median 2.0 mg/l. 24 TP, median 0.09 mg/l. Two failed bioassessments (SCI) in 2002. 3c (High) (2004) PP - 8/24 values exceed criterion. VP - 3/10 values exceed criterion. 2 Delist. PP - 0 chla annual means exceed 20 ug/l (1991-1994, 1996) 87 chla values, range of chla values 0 - 19.4 ug/L, mean chla over entire period 1.74 ug/L. VP - 0 chla annual means exceed threshold (1996), 17 chla values, range of chla values 0 - 19.4 ug/L, mean chla 2.14 ug/L over entire period. The annual mean chla concentrations were 1991-1.2 ug/l, 1992-1.09 ug/l, 1993-0.55 ug/l, 1994-3.06 ug/l, and 1996-1.55 ug/l. 25 TN values, 1.31 mg/l. 24 TP values, 0.09 mg/l. 3c (High) (2004) PP - 11/19 values exceed criterion. VP - 3/10 values exceed criterion. 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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