Steve Harrison, Environmental Manager Bureau of Entomology and Pest Control -Mosquito Control Section

—Stormwater Quality Rule (Effective on or after July 1, 2011) (1)-Stormwater treatment quality only; not quantity -Does not replace current permit requirements; only changes treatment and design criteria (2)-Incorporates by reference Stormwater Quality Applicant’s Handbook -Identification of rules of Water Management Districts (WMDs) that are superseded (likely to be moved to WMD rules) (3)Does not affect agriculture or silviculture

NEW RULE OBJECTIVES – –Increase nutrient removal – –Establish requirements for discharges to impaired waters – –Statewide consistency – –Update BMP design criteria – –Allow BMP Treatment Train credits – –Encourage low impact design – –Encourage retrofitting

NON-OFW’sOFW’s IMPAIRED WATERS WITH ADOPTED TMDL or BMAP Redevelopment Sites ≤ X Acres 85% or Post=Pre, whichever is less unless feasibility analysis demonstrates lower level is appropriate Redevelopment Sites ≤ X Acres Post=Pre, unless feasibility analysis demonstrates lower level is appropriate Redevelopment Sites ≤ X Acres 85% or Post=Pre, whichever is less unless feasibility analysis demonstrates lower level is appropriate AND Net improvement for pollutant not meeting water quality standards Redevelopment Sites ≤ X Acres 85% or Post=Pre, whichever is less unless feasibility analysis demonstrates lower level is appropriate AND Net improvement or TMDL/BMAP % reduction, whichever is greater, pollutant not meeting water quality standards PERFORMANCE STANDARDS

Performance Standard for Stormwater Discharges (62-40, F.A.C.) Erosion and sediment control Retain sediment on-site Not violate turbidity standard Stormwater quality – Original % average annual load reduction 95% average annual load reduction** “Of Total Suspended Solids” Stormwater quality – % average annual load reduction 95% average annual load reduction** “Of pollutants that cause or contribute” ** 95% for OFW’s (Outstanding Florida Waters)

Problems with “Old Way”  WMD’s were allowed to adopt their own BMP design criteria – resulted in varying degrees of treatments throughout the state  Nutrient (mainly Nitrogen and Phosphorous) enrichment has increased in surface and ground waters  BMPs were never updated to adequately deal with nutrient removal  Research shows that current design and performance criteria do not properly address nutrient loadings from typical stormwater runoff conditions (Example: Wet Detention = 43% Nitrogen removal)

June 6, 2008 Caloosahatchee River October 15, 2005

Solutions  Unified Stormwater Treatment Rule (Draft Rule )  Update BMPs to meet new standards (New Stormwater Quality Handbook referenced in )  Utilize BMP Treatment Trains to achieve adequate treatment  Give credit for Low Impact Design

(BMPs) BEST MANAGEMENT PRACTICES (BMPs)   Three basic types: – –Retention BMPs: treatment volume is recovered through percolation into the soil – –Detention BMPs: detain stormwater and discharge it at a specified rate – –Source Control BMPs: nonstructural BMPs that are used to either minimize the amount of stormwater generated or minimize the amount of pollutants getting into the stormwater

Specific BMPs  Retention Basins  Underground Storage and retention Systems  Underground Retention Vault/Chamber  Swales  Vegetated Natural Buffers  Pervious Pavement  Green Roof/Cistern System  Wet Detention System  Managed Aquatic Plant System  Stormwater Harvesting  Wetland Stormwater Treatment Train  Underdrain Filtration  Chemical Treatments  Low Impact Designs

Concerns for Mosquito Control Industry?  Increase in mosquito breeding habitat?  Routine inspections?  Larger systems?  Maintenance of systems?

Retention BMPs

Detention BMPs

Source Control BMPs   Natural Area Conservation   Site Reforestation   Disconnecting Directly Connected Impervious Areas   Florida-friendly landscaping   Rural subdivisions