Upper St. Johns River Group 3 BasinVerified ListOGC CaseNumberPlanning Unit WBIDWater Segment NameWaterbodyTypeWaterbodyClass11998 303(d)Parameters ofConcernParametersAssessed Usingthe ImpairedWaters Rule (IWR)ConcentrationsCausing Impairment2Priority for TMDLDevelopment3Projected Year ofTMDLDevelopment3Comments(# of Exceedances/ # of Samples)PP=Planning Period VP=Verified Period4Jane Green Creek3073 CRABGRASS CREEK Stream 3F Copper> e(0.854[lnH]-1.465)Medium 2009 PP = 7 / 46; VP = 6 / 30Jane Green Creek3073 CRABGRASS CREEK Stream 3F NutrientsNutrients(Chl a)Median TN = 1.10 mg/LMedian TP = 0.03 mg/LMedium 2008PP - 1 chl aannual mean exceeded 20 ug/l in 2000. VP - 1 chlaannual mean exceeded 20 ug/l in 2000. 53 Chlavalues, ranged 1 -69 μg/L. mean = 5.9 μg/L Nitrogen limited with some co-limitationbased on a TN/TP median of 9.17 (49 values) in the PP and aTN/TP median of 9.91(33 values)in the VP.Jane Green Creek3073 CRABGRASS CREEK Stream 3F Coliform BacteriaFecal ColiformBacteria> 400 per 100 mlMedium 2008PP = 2 / 10; VP = 5 / 21. Coliform mean 204 counts/100 ml, median70 counts/100 ml, range 6 - 888 counts/100ml.Jane Green Creek3073 CRABGRASS CREEK Stream 3F Coliform BacteriaTotal ColiformBacteria> 2400 per 100 mlMedium 2008PP = No Data; VP = 5 / 20. Total coliform mean 2100counts/100ml, median 1254 counts/100 ml; range 175 - 7400counts/100 ml.Lake Poinsett2893KLAKE POINSETT Lake 3F Dissolved OxygenDissolved Oxygen< 5.0 mg/L Medium 2008PP = 92 / 220; VP = 46 / 119. DO met verification threshold of IWRand nutrients are the causative pollutant. Community co-limited bynitrogen and phosphorus based on a TN/TP median of 26.6 in theverified period. 127 TN values, median 1.99 mg/l. 127 TP values,median 0.07 mg/l. Insufficient BOD data. 265 DO values, median6.57 mg/l, mean 5.51 mg/l, range 0 - 17.7 mg/l.Lake Poinsett2893KLAKE POINSETT Lake 3F Nutrients(TSI)Median TN = 1.99 mg/LMedian TP = 0.07 mg/LMedium 2009PP - 2 TSI annual means exceeded 60 of in 2000-2001. VP - 2 TSImeans exceeded 60 in 2000-2001. Co-limited by nitrogen andphosphorus based on a TN/TP median of 28.2 (262 values) in thePP and a TN/TP median of 26.6 (127 values) in the VP. 127 TNvalues, median 1.99 mg/L. 127 TP values, median 0.07 mg/L. EPAcompleted TMDL in 2003 based on SJRWMD PLRG, but it is not astate-adopted TMDL.Lake Poinsett2893LST JOHNS RIVER ABOVELAKE POINSETT Stream 3F Dissolved OxygenDissolved Oxygen< 5.0 mg/L High 2004PP = 74 / 130; VP = 45 / 87. DO met verification threshold of IWRand nutrients are the causative pollutant. Community co-limited bynitrogen and phosphorus based on a TN/TP ratio of 16.6 (99 TN andTP pairs). 98 TN values, median 1.90 mg/l. 98 TP values, median0.11 mg/l. Insufficient BOD data. 156 DO values, median 4.55 mg/l,mean 5.09 mg/l, range 0.29 - 29.0 mg/l.Lake Poinsett2893LST JOHNS RIVER ABOVELAKE POINSETT Stream 3F NutrientsNutrients (HistoricChla)Median TN = 1.90 mg/LMedian TP = 0.11 mg/LHigh 2004PP - Chla annual mean in 1997 (12.1 μg/L) exceeded the historiclevel (6.1 μg/L, calculated based on data from 1981 through 1985)by more than 50%; VP - Chla annual means in two consecutiveyears (2000 and 2001, 17.1 and 18.1 μg/L, respectively) exceededthe historic level by more than 50%. Based on the TN/TP ratio of16.6, the community is nitrogen and phosphorus co-limited (TN/TPratio was calculated based on 99 TN and TP pairs).Puzzle Lake2893IST JOHNS RIVER ABOVEPUZZLE LAKE Stream 3F Dissolved OxygenDissolved Oxygen< 5.0 mg/L Medium 2008PP = 96 / 209; VP = 50 / 136. DO met verification threshold of IWRand nutrients are the causative pollutant. Community co-limited bynitrogen and phosphorus based on a TN/TP raio of 21.8 (calculatedbased on 120 TN and TP pairs). 92 TN values, median 1.85 mg/l.137 TP values, median 0.08 mg/l. 65 BOD values, median 1.2 mg/l.271 DO values, median 5.44 mg/l, mean 5.02 mg/l, range 0.06 -12.16 mg/l.Puzzle Lake2893IST JOHNS RIVER ABOVEPUZZLE LAKE Stream 3F NutrientsNutrients (Historic Chla)Median TN = 1.93 mg/LMedian TP = 0.07 mg/LMedium 2008PP - Chl a annual means in two consective years (1993-1994, Chl aconcentrations: 5.2 and 7.8 ug/L, respectively) exceeded the historiclevel of 2.8 μg/L (which was calculated based on the data from 1980through 1984) by more than 50%. VP - Chl a annual means in twoconsecutive years (2001-2002, Chl a concentration 8.9 and 13.1ug/L, respectively) exceeded the historic level by more than 50%.Based on the TN/TP ratio median of 21.8, the community is colimited by nitrogen and phosphorus (the TN/TP ratio was calculatedbased on 120 pairs of TN and TP concentrations)June 1, 20051 of 2Florida Department of Environmental ProtectionUpper St. Johns River Group 3 BasinVerified ListOGC CaseNumberPlanning Unit WBIDWater Segment NameWaterbodyTypeWaterbodyClass11998 303(d)Parameters ofConcernParametersAssessed Usingthe ImpairedWaters Rule (IWR)ConcentrationsCausing Impairment2Priority for TMDLDevelopment3Projected Year ofTMDLDevelopment3Comments(# of Exceedances/ # of Samples)PP=Planning Period VP=Verified Period4St. Johns Marsh28931 SAWGRASS LAKE Lake 1 Dissolved Oxygen< 5.0 mg/L Medium 2009PP = 77 / 113; VP = 23 / 31. DO met verification threshold of IWR.Phosphorus exceeds the screening level for lakes and may be thecausitive pollutant. 35 TP values, median 0.13 mg/l. 33 TN values,median 1.4 mg/l. 1 BOD value, median n/a. 132 DO values, median3.84 mg/l, mean 4.03 mg/l, range 0.11 - 10.99 mg/l.St. Johns Marsh28931 SAWGRASS LAKE Lake 1Mercury (Based onFish ConsumptionAdvisory)Mercury(in fish tissueExceeds DOH threshhold(> 0.5 mg/kg)Low 2011Based on test results from DoH on 12 large mouth bass in Januaryof 2004, the average fish tissue merucury concentration is 0.501ppm. The lake is therefore verified as impaired bymercurySt. Johns Marsh2893Q LAKE HELEN BLAZES Lake 1 Dissolved OxygenDissolved Oxygen< 5.0 mg/L High 2004PP = 122 / 151; VP = 63 / 81. DO met verification threshold of IWR,and nutrients are the causative pollutant. Community co-limited bynitrogen and phosphorus based on a TN/TP ratio of 11.9 (calculatedbased on 91 TN and TP pairs). 91 TP values, median 0.15 mg/l. 91TN values, median 1.71 mg/l. No BOD data, median n/a. 162 DOvalues, median 2.81 mg/l, mean 3.12 mg/l, range 0.1 - 8.6 mg/l.St. Johns Marsh2893Q LAKE HELEN BLAZES Lake 1 NutrientsNutrients(TSI)Median TN = 1.71 mg/LMedian TP = 0.15 mg/LHigh 2004PP - 2 TSI annual means exceeded 60 in 1998 and 1999. VP - 2TSI means exceeded 60 in 1998 and 1999. 91 TN values, median1.71 mg/L. 91 TP values, median 0.15 mg/L. Chla ranged 1.0 -63.0 μg/L in both PP and VP with a median value of 6.5 μg/L Colimited by nitrogen and phosphorus based on a TN/TP median of11.9 (164 values) in the PP and a TN/TP median of 11.5 (91 values)in the VP. EPA completed TMDL in 2003 based on SJRWMDPLRG, but it is not a state-adopted TMDL.St. Johns Marsh2893XST JOHNS RIVER ABOVESAWGRASS LAKE Stream 1Dissolved Oxygen -BODDissolved Oxygen -Biochemical OxygenDemand < 5.0 mg/L High 2004PP = 27 / 41; VP = 6 / 22. DO met verification threshold of IWR.BOD exceeds the screening level for streams and may be thecausative pollutant (BOD median = 2.8 mg/L). 11 TN values, median1.58 mg/l. 16 TP values, median 0.08 mg/l. 14 BOD values, median2.8 mg/L. 59 DO values, mean 4.71 mg/l, median 4.89 mg/l, range0.14 - 8.61 mg/l.St. Johns Marsh3108C THREE FORKS Stream 1 Dissolved Oxygen< 5.0 mg/L Medium 2009PP = 59 / 71; VP = 16 / 22. DO met verification threshold of IWR.Nitrogen exceeds the screening level for streams and may be thecausative pollutant. 22 TN values, median 1.68 mg/l. 23 TP values,median 0.12 mg/l. Insufficient BOD values. 93 DO values, median2.28 mg/l, mean 2.82 mg/l, range 0.12 - 7.91 mg/l.Toschatchee28935ST JOHNS RIVER ABOVEPUZZLE LAKE S Stream 3F Dissolved Oxygen< 5.0 mg/L Medium 2009PP = 42 / 152; VP = 18 / 94. DO met verification threshold of IWR.Nitrogen exceeds the screening level for streams and may be thecausative pollutant. 47 TN values, median 1.74 mg/l. 94 TP values,median 0.07 mg/l. 11 BOD values, median 1.0 mg/l. 177 DOvalues, median 6.5 mg/L; Mean 6.1 mg/L; ranged from 0.2 - 11.1mg/L.1Florida's waterbody classifications are defined as:1- Potable water supplies,2- Shellfish propagation or harvesting,3F- Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlifein fresh water, 3M - Recreation, propagation, and maintenance of a healthy, well-balanced population of fish and wildlife in marine water, 4 - Agricultural water supplies, 5 - Navigation, utility, and industrial use.if it was originally high or changed to medium if it was originally low. In the case of mercury, the priority remains low. Where a parameter was only identified as impaired under the IWR, priorities of high, medium, or low were used.4PP - Planning Period (January 1, 1992 through December 31, 2001); VP - Verified Period (January 1, 1997 through June 30, 2004)The Upper St.Johns Verified List is based on IWR Run 17.2"ln H" means the natural logarithm of total hardness expressed as mg/L of CaCO3. For metals criteria involving equations with hardness, the hardness shall be set as 25 mg/L if actual hardness is < 25mg/L and setat 400 mg/L if actual hardness is > 400 mg/L. The concentration causing impairment for nutrient listings is the median.3Priority and schedule for this WBID reflects the priority established for the WBID in the 1998 303(d) list. Where a parameterwas 1998 303(d) listed, the priority shown for it in the 1998 303(d) list was retainedJune 1, 20052 of 2Florida Department of Environmental Protection