Lee County Government Division of Natural Resources TMDL/BMAP Update TMDL/BMAP Update November 30,...

Lee County GovernmentDivision of Natural

Resources

TMDL/BMAP UpdateNovember 30, 2010

Roland Ottolini, Director Lee County Division of Natural Resources


Resources

• Many creeks and streams in Lee County have been designated Impaired Waters by either the FDEP or USEPA and by law will have Total Maximum Daily Loads (TMDLs) for each causative pollutant

• The FDEP has proceeded with adoption of TMDLs for Hendry Creek, Imperial River and the Tidal Caloosahatchee

• A Basin Management Action Plan (BMAP) is established for each to allocate pollutant reductions to each stakeholder and to demonstrate how compliance will be achieved

• Lee County is the major stakeholder as we hold the NPDES permit for stormwater discharges and WWTP. This permit will be amended to require projects and programs to fulfill these obligations, in 3 –five year cycles

• FDEP presented the initial allocations and pollutant reductions in a workshop held on September 21 and 22, 2010

• Lee County and others have been given 60 days to review and comment

BMAP Process

Allocation to Stakeholders Consideration of Existing Projects Development of New Projects Monitoring Plan BMAP Documentation

Hendry Creek Watershed

Hendry Creek Total Loads

JurisdictionArea

(acres)Runoff (m3/yr)

TN(lbs/yr)

% of Total

Lee 10,161 21,159,226 68,623 97.7%Catalina 111 106,821 248 0.4%Agriculture 98 113,319 668 1.0%Roads 89 259,245 721 1.0%Total 10,459 21,638,611 70,261 100.0%

TOTAL

Hendry Creek TMDL Requirements

TMDL Based on Reference Site Analysis is 0.74 mg/l

TMDL Load Results Load at 0.74 mg/l = 35,302 lb/yr Reduction is 34,960 lb/yr

Background Load

Background Load = Total Load from Natural Land Uses

JurisdictionArea


TN(lbs/yr)

Background (lb/yr)

Lee 10,161 21,159,226 68,623 30,626Catalina 111 106,821 248 247Agriculture 98 113,319 668 197Roads 89 259,245 721 659Total 10,459 21,638,611 70,261 31,729

Allocation by % of Non-Background Loading

Non-Background Load at TMDL = TMDL Load – Background Load= 35,302 - 31,729 = 3,573 lb/yr

JurisdictionArea

(acres)TN

(lbs/yr)Background

(lb/yr)

Non-Background

(lb/yr)% of Non-

Background

Portion of Non-

Background Allocation%

Reduction

1st 5-yr Load

Reduction (lb/yr)

Lee 10,161 68,623 30,626 37,997 98.6% 3,523 34,149 50.2% 11,491Catalina 111 248 247 1 0.0% 0 247 0.6% 0Agriculture 98 668 197 471 1.2% 44 241 64.0% 142Roads 89 721 659 62 0.2% 6 665 7.8% 19Total 10,459 70,261 31,729 38,532 100.0% 3,573 35,302 49.8% 11,653Allocatible 3,573

Hendry Creek Urban Land-use 1988-2004

Imperial River Watershed

Imperial River Total Loads

JurisdictionArea


TN(lbs/yr)

% of Total

Lee 26,101 53,332,952 95,653 36.8%Bonita Springs 7,150 12,582,591 43,265 16.7%Agriculture 11,597 17,867,195 120,084 46.2%Roads 96 265,607 739 0.3%Total 44,945 84,048,346 259,741 100.0%

TOTAL

TMDL Requirements

TMDL Based on Reference Site Analysis is 0.74 mg/l

Calculate Load from Target Concentration Target Load:

Load at 0.74 mg/l = 137,492 lbs/yr Reduction is 122,249 lbs/yr

Background Load


JurisdictionArea

(acres)TN

(lbs/yr)Background

(lb/yr)Lee 26,101 95,653 93,195Bonita Springs 7,150 43,265 20,212Agriculture 11,597 120,084 23,426Roads 96 739 659Total 44,945 259,741 137,492


Non-Background Load at TMDL = TMDL Load – Background Load= 137,492 - 137,492 = 0

JurisdictionArea

(acres)TN

(lbs/yr)Background

(lb/yr)

Non-Background

(lb/yr)% of Non-

Background

Portion of Non-

Background Allocation%

Reduction

1st 5-Year Reduction

(lb/yr)Lee 26,101 95,653 93,195 2,458 2.0% 0 93,195 2.6% 819Bonita Springs 7,150 43,265 20,212 23,053 18.9% 0 20,212 53.3% 7,684Agriculture 11,597 120,084 23,426 96,658 79.1% 0 23,426 80.5% 32,219Roads 96 739 659 80 0.1% 0 659 10.9% 27Total 44,945 259,741 137,492 122,249 100.0% 0 137,492 47.1% 40,750Allocatible -374

Imperial RiverUrban Land-

use 1988-2004

Caloosahatchee Estuary TMDL 3240A, 3240B, 3240C

TMDL for Nutrients Causative Pollutant – Total Nitrogen (TN) Target : Seagrass light requirements in San Carlos

Bay

TMDL= 23% Reduction in Total Nitrogen (over the entire river basin)

Caloosahatchee BMAP

Current Total Load at the Estuary – 11,799,762 lbs/yr

Current Load from Tidal Portion - 2,063,723 lbs/yr

Required Reduction – 2.71 million pounds Target TN load at Estuary – 9,085,817

lbs/yr

Summary of TMDL

Load (lb/yr)

Load

(tons/y) % of Total

Upstream of S-79Lake Okeechobee at TMDL 6,222,155 2,822 52.7%Load to be Removed from Lake O 782,224 355 6.6%NPS Loading 2,731,660 1,239 23.2%

9,736,039 4,416 82.5%

Estuarine (Below S-79)WWTP Loads 136,875 62 1.2%NPS Loads 1,926,848 874 16.3%

2,063,723 936 17.5%

11,799,762 5,352 100.0%9,085,817 4,121 77.0%2,713,945 1,231 23.0%Amount Reduced

Total to EstuaryLoad at TMDL

Source of Total Nitrogen

Existing Loading

Subtotal From S-79

Subtotal Below S-79

Key Stakeholders - Tidal Caloosahatchee Basin

Lee County Charlotte County City of Cape Coral City of Ft. Myers East County Water Control District Lucaya CDD FDOT FDACS

Background Load


Total Area (Acres)

Average Annual TN Load (lb)

NPS Background

Loading (lb/yr)

Non-Background Load (Total - Natural Load,

lb/yr)

% of Total Non-

Background Load

36,621 360,239 185,333 174,906 26.2%11,802 168,805 102,000 66,805 10.0%32,984 140,145 106,667 33,478 5.0%

134 871 620 251 0.0%64,304 556,429 306,000 250,429 37.5%72,097 205,952 195,654 10,298 1.5%

2,256 28,635 11,333 17,302 2.6%39,048 324,076 209,333 114,742 17.2%

259,247 1,785,153 1,116,941 668,212 100.0%

Charlotte County 1

FDOT Agriculture

Total Load

City of Cape CoralCity of Fort Myers

ECWCDLucaya CCD

Unincorp. Lee County

Area Name (Within Tidal

Caloosahatchee Watershed)

Existing Loading


Non-Background Load at TMDL = TMDL Load – Background Load= 1,347,568 - 1,116,941 = 257,627

Total Area (Acres)

Average Annual TN Load (lb)

NPS Background

Loading (lb/yr)

Allocated Load by %

Non-Background

Background + Allocated

Load

Load Reduction

(lb/yr)

% Reduction

36,621 360,239 185,333 67,434 252,768 107,472 29.8% 35,82411,802 168,805 102,000 25,757 127,757 41,049 24.3% 13,68332,984 140,145 106,667 12,907 119,574 20,571 14.7% 6,857

134 871 620 97 717 154 17.7% 5164,304 556,429 306,000 96,552 402,552 153,877 27.7% 51,29272,097 205,952 195,654 3,970 199,625 6,327 3.1% 2,109

2,256 28,635 11,333 6,671 18,004 10,631 37.1% 3,54439,048 324,076 209,333 44,239 253,572 70,504 21.8% 23,501

259,247 1,785,153 1,116,941 257,627 1,374,568 23.0%

!st 5-Year Load

Reduction (lb/yr)

Unincorp. Lee County

Allocation by % Non-BackgroundArea Name

(Within Tidal Caloosahatchee

Watershed)

Existing Loading

Lucaya CCD


ECWCD

Charlotte County 1

FDOT Agriculture

Total Load

Areas of Urban BMPs

Total Area (Acres)

% of Area with Urban

BMPs

36,621 14.1%11,802 19.1%32,984 30.0%134 0.0%

64,304 11.5%72,097 0.1%2,25639,048

259,247Total Load 1

Lucaya CCDUnincorp. Lee

Charlotte CountyFDOT

Agriculture

Caloosahatchee Estuary NPS Loading - Urban BMPs In Existing Loading

Area Name (Within Tidal

Caloosahatchee Watershed)


ECWCD

Difference in Land Uses

BMAP Project Credits Eligibility Dates for BMAP Load Reduction Credits

are Based on the Data Period Preceding the TMDL

Pounds reduced will be subtracted from the total allocation for those projects completed July 1, 2000 and later.

Credit counts for treatment above and beyond permit requirements. Example 1 – BMP To Mitigate Construction Example 2 – Regional BMP Example 3 – Retrofit BMP

Projects Must Be Operated and Properly Maintained as Permitted.

Operation and Maintenance records may be Requested as Part of the Project Review Process.

Projects Not Operated as Permitted, Including Older Projects Not Included for Specific Credit, Could Result in Additional Reduction Requirements by the Responsible Entity.

BMAP Project Credits

Potential Areas Where Projects

May Be Best

Stakeholder Projects andManagement Activities

PROJECTSStructural BMPs Quantifiable Load

Reductions Reductions Not

Currently Quantified

Restoration and WQ Improvement Projects

Basic Stormwater Management Program Implementation

ACTIVITIESRegulations, Ordinances, and Guidelines Special Studies and Planning EffortsStreetsweepingEnhanced O&M ProgramCertain Agricultural BMPsPublic Education and Outreach Efforts

Preliminary Projects Eligible for Credit

Structural BMPs (Wet Detention, Baffle Boxes, etc.)

Source Controls (Street Sweeping, Education)

Special Consideration: Conservation Land Purchases If Land Use

Changed After Purchase Note – May be Exchange of Loading from Original

Owner to New Owner

Cost of Compliance

Removing nutrients from polluted water is proving to be especially costly in urban areas, with costs of $200-$20,000 per pound of nitrogen removed per year. Costs to meet TMDLs in Lee County will be in the multi-millions.

Land availability is a major implementation constraint in urban settings. Retrofitting of older urban areas can be very expensive. Most public owned lands are road rights of way and environmental land acquisitions in the headwaters.

Technology offered thus far yields very little nutrient reduction efficiency, especially TN

Ten Mile Canal Filter Marsh removes an average of 4700 lbs TN/year. This project was built on 10 acres of land already owned by Lee County at a cost of $3m. This yields a cost of $638 per lb TN removed per year, not including land. At this rate, compliance with the Hendry Creek TMDL will cost $22m to meet the required 35,000 lbs/ year load reduction. For the Tidal Caloosahatchee, $98m to remove 153.877 lbs TN!

Lee County GovernmentDivision of Natural Resources


Resources

Questions

• Does the Dissolved Oxygen (DO) standard apply to our estuaries?

• Is Total Nitrogen (TN) the causative pollutant?

• The State has used a reference TN concentration of 0.74 mg/l for the TMDL allocation and load reduction analysis. How can this be achieved when the Event Mean Concentrations (EMCs) for all land uses are above this rate, including wetlands?


Resources

Questions

• What is the purpose of establishing a regulatory concentration that is less than natural conditions loading?

• Are the loading projections realistic? How do they compare to actual field data?

• What technologies are available to reduce TN practically and cost effectively? In retrofit scenarios?

• Why should local governments and other stakeholders bear the entire burden of cleaning up developments that have been permitted and presumed in compliance with current water quality standards?


ResourcesRecommendations

• Realistic numbers representative of real problem

• Give us the technology necessary to succeed

• State should share the burden by taking the allocation of permitted projects or providing in-kind grants to implement projects to offset their impact

• State should support the inclusion of new co-applicants under the County’s NPDES MS4 permit for fair and equitable distribution of allocation

• State needs to adopt SW rules that meet the criteria

Lee County Government Division of Natural Resources TMDL/BMAP Update TMDL/BMAP Update November 30,...

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