Quantities of As in Florida

Purpose Determine the relative magnitude of arsenic from CCA-treated wood versus the amounts from other arsenic sources Determine the relative magnitude of arsenic from CCA-treated wood versus the amounts from other arsenic sources Evaluate arsenic inputs, outputs, and reservoirs Evaluate arsenic inputs, outputs, and reservoirs

Inputs/Outputs/Reservoirs CCA-treated Wood CCA-treated Wood Non-CCA Pesticides Non-CCA Pesticides Geologic Sources Geologic Sources Fuels Fuels Fertilizers Fertilizers Food Sources Food Sources Wastes Disposed Within State Wastes Disposed Within State Hydrosphere Hydrosphere

Methods

Methods: CCA Input: 31.2 million ft 3 /yr Extrapolated from Industry Statistics Extrapolated from Industry Statistics Average retention of 0.45 pcf (22% arsenic) (million ft 3 /yr)(retention) = 1,400 metric tons As/yr = 1,400 metric tons As/yr AWPA,AWPI,SFPA~0.38 pcf (US) Florida Questionairre~0.76 pcf

Methods: non-CCA Pesticides Cattle Dipping Vats Cattle Dipping Vats (Historical Use) (Historical Use) MSMA/DSMA/Cacodylic Acid (Current Use) MSMA/DSMA/Cacodylic Acid (Current Use) Agriculture Agriculture Golf Course Use Golf Course Use

MSMA/DSMA in Agriculture From the Nat. Center for Food and Ag. Policy, 2002

MSMA Use in Golf Courses Input = (Surface Area of Golf Courses) (Fraction of Golf Courses that Use MSMA) (Application Rate) Surface Area = Total Area from Florida Golf Courses Fraction of Golf Courses that Use MSMA = 0.96 (Ma et al. 2000) Application Rate = 11.7 lbs/acre/yr (from Hawaiian Study) Input ~ 500 metric tons As/yr Input ~ 500 metric tons As/yr

MSMA Stored in Golf Courses DERM 1999: 16.9 mg/kg DERM 1999: 16.9 mg/kg (0 to 1 or 2 ft composites) (0 to 1 or 2 ft composites) Ma et al. 2000: 69.2 mg/kg Ma et al. 2000: 69.2 mg/kg Mass = (Surface Area of Golf Courses) x (Concentration) x (Concentration)

Results

InputsConc.ppm Metric tons As/yr CCA-Treated Wood 3,1001,400 MSMAAgriculture Golf Courses 2,8001, GeologicPhosphateLimestone FuelsCoalPetroleum HydrosphereRainRivers Food Sources FishShellfish Chicken Manure SUM2,500

Outputs Input Flux ~ 2,500 metric tons As/yr Conc.ppm Metric tons As/yr GeologicPhosphate HydrosphereRivers WastesWastewater WTE Air Emissions <0.01< Output Flux ~ 10% of Input

Accessible Reservoir Conc.ppm Metric tons As CCA-Treated Wood 3,10024,000 Other Arsenicals Cattle Dipping Golf Courses (Ma) Golf Courses (DERM) 1600 (sol’n) 69171,2002,50011,000 Geologic Phosphogypsum Stacks Limestone in Use 435,0003,400 HydrosphereLakesGroundwater Surface Soil ,4002,500 SUM47,000-56,000

Summary/Conclusions Approx. 2,500 metric tons As imported per yr Approx. 2,500 metric tons As imported per yr CCA-treated wood (60%) CCA-treated wood (60%) Arsenical pesticides,MSMA (20%) Arsenical pesticides,MSMA (20%) Geologic Sources (15%) Geologic Sources (15%) About 10% of the imported As is exported  Majority accumulates over time About 10% of the imported As is exported  Majority accumulates over time

Recommendations In order to limit As impacts In order to limit As impacts Reduce use of MSMA Reduce use of MSMA Properly dispose CCA-treated wood Properly dispose CCA-treated wood Minimize impacts of CCA-treated wood currently in service Minimize impacts of CCA-treated wood currently in service

Questions? Draft Report posted at