Shark River Slough Clause Samples

Shark River Slough. The Consent Decree of 1995 specified that interim and long-term total phosphorus (TP) concentration limits for discharges into the Everglades National Park (ENP) (Figure 3) through Shark River Slough be met by October 1, 2003, and December 31, 2006, respectively. It was specified that the TP concentrations be presented as 12-month flow-weighted means. Only the TP concentrations for the water year ending September 30th are evaluated for compliance with the Consent Decree limits. The long-term TP concentration limit for inflows to Shark River Slough through structures S12A, S12B, S12C, S12D and S333 represents the concentrations delivered during the Outstanding Florida Waters baseline period of March 1, 1978, to March 1, 1979, and is adjusted for variations in flow. Inflow concentrations of TP through Shark River Slough are compared to the interim and long-term limits at the end of each water year (October 1st through September 30th) from 1991 to 2006 (Figure 4). The 12-month flow-weighted mean TP concentration for October 2006 through September 2007 was 9.8 ppb. The corresponding long-term limit, which became effective on December 31, 2006, was 11.8 ppb (Table 2). The Consent Decree stipulates that the percentage of flow-weighted mean TP concentrations greater than 10 ppb from each sampling event in any 12- month period must not exceed a guideline value based on flow into Shark River Slough for the same 12-month period. For the 12-month periods ending July, August and September TP concentrations greater than 10 ppb were 47.4, 44.4 and 37.5 percent, respectively. The observed percentages of the sampling event flow-weighted mean TP concentrations greater than 10 ppb were lower than the guidelines for July, August and September 2007 (Table 2). The 12-month flow-weighted mean concentrations and the flow- weighted mean concentrations for individual sampling events are presented in Figure 5.

Shark River Slough. The Consent Decree of 1995 specified that interim and long-term total phosphorus concentration limits for discharges into the Everglades National Park (ENP) through Shark River Slough be met by October 1, 2003, and December 31, 2006, respectively. Only the total phosphorus concentrations for the water year ending September 30 are evaluated for compliance with the Consent Decree limits. It was also specified that the total phosphorus concentrations be presented as 12- month moving flow-weighted means. The long-term total phosphorus concentration limit for inflows to Shark River Slough through structures S12A, S12B, S12C, S12D and S333 represents the concentrations delivered during the Outstanding Florida Waters baseline period of March 1, 1978 to March 1, 1979, and is adjusted for variations in flow. Inflow concentrations of total phosphorus through Shark River Slough are compared to the interim and long-term limits at the end of each water year from 1991 to 2003 (Figure 3A). The 12-month moving flow-weighted mean total phosphorus concentration ending September 2003 was 9.2 ppb. Corresponding interim and long-term limits were 9.4 and 7.6 ppb, respectively. For the ten-year period 1994 through 2003, the interim limit applicable to Shark River Slough has been met eight times. The limit was exceeded in Water Years 2000 and 2001.

Shark River Slough. The Consent Decree of 1995 specified that interim and long-term total phosphorus (TP) concentration limits for discharges into the Everglades National Park (ENP) (Figure 3) through Shark River Slough be met by October 1, 2003, and December 31, 2006, respectively. It was specified that the TP concentrations be presented as 12-month flow-weighted means. Only the TP concentrations for the water year ending September 30 are evaluated for compliance with the Consent Decree limits. The long-term TP concentration limit for inflows to Shark River Slough through structures S12A, S12B, S12C, S12D and S333 represents the concentrations delivered during the Outstanding Florida Waters baseline period of March 1, 1978, to March 1, 1979, and is adjusted for variations in flow. Inflow concentrations of TP through Shark River Slough are compared to the interim and long-term limits at the end of each water year (October 1st through September 30th) from 1991 to 2006 (Figure 4). The 12-month flow-weighted mean TP concentration ending September 2006 was 8.7 ppb. Corresponding interim and long-term limits were 10.3 and 8.8 ppb, respectively.

Shark River Slough. The Consent Decree of 1995 specified that interim and long-term total phosphorus concentration limits for discharges into the Everglades National Park (ENP) through Shark River Slough be met by October 1, 2003, and December 31, 2006, respectively. The limits apply to the water year ending September 30. The long-term total phosphorus concentration limit for inflows to Shark River Slough through structures S12A, S12B, S12C, S12D and S333 represents the concentrations delivered during the Outstanding Florida Waters baseline period of March 1, 1978 to March 1, 1979, and is adjusted for variations in flow. In addition, it is required that phosphorus concentrations be presented as 12-month moving flow-weighted means. Inflow concentrations of total phosphorus through Shark River Slough are compared to the interim and long-term limits at the end of each water year from 1991 to 2001 (Figure 2a). The 12-month moving flow-weighted mean total phosphorus concentration ending September 2001 was 15.0 ppb. Corresponding interim and long-term limits were 12.2 and 10.8 ppb, respectively. This was the second consecutive year that both limits were exceeded for the water year ending in September. Both the 2000 and 2001 water years were very dry, resulting in lower volumes of flow with higher total phosphorus concentrations entering the Park than those observed in wetter years. Analysis of the TP concentrations in Shark River Slough by the TOC is continuing. Preliminary evaluation suggests that drought conditions, implementation of phosphorus controls and local water management are contributing factors to the ambient concentrations. The Consent Decree stipulates that the percent of flow-weighted mean total phosphorus concentrations greater than 10 ppb from each sampling event in any 12-month period must not exceed a guideline value based on flow into Shark River Slough for the same 12-month period. For the 12-month periods ending April, May and June 2002, the percent of flow-weighted mean total phosphorus concentrations greater than 10 ppb were 40.9, 43.5 and 40.9, respectively. These observed values were all less than their respective guidelines (Table 2). The individual sampling events and the 12-month moving average are presented in Figure 2b.

Shark River Slough. The Consent Decree of 1995 specified that interim and long-term total phosphorus concentration limits for discharges into the Everglades National Park (ENP) (Figure 3) through Shark River Slough be met by October 1, 2003, and December 31, 2006, respectively. It was specified that the total phosphorus concentrations be presented as 12-month flow-weighted means. Only the total phosphorus concentrations for the water year ending September 30 are evaluated for compliance with the Consent Decree limits. The long-term total phosphorus concentration limit for inflows to Shark River Slough through structures S12A, S12B, S12C, S12D and S333 represents the concentrations delivered during the Outstanding Florida Waters baseline period of March 1, 1978 to March 1, 1979, and is adjusted for variations in flow. Inflow concentrations of total phosphorus through Shark River Slough are compared to the interim and long-term limits at the end of each water year (October 1st through September 30th) from 1991 to 2005 (Figure 4). The 12-month flow- weighted mean total phosphorus concentration ending September 2005 was