Quantities of As
in Florida
Purpose


Determine the relative magnitude
of arsenic from CCA-treated wood
versus the amounts from other
arsenic sources
Evaluate arsenic inputs, outputs,
and reservoirs
Inputs/Outputs/Reservoirs








CCA-treated Wood
Non-CCA Pesticides
Geologic Sources
Fuels
Fertilizers
Food Sources
Wastes Disposed Within State
Hydrosphere
Methods
Methods: CCA
Input: 31.2 million ft3/yr
Extrapolated from Industry
Statistics
Average retention of 0.45 pcf
(22% arsenic)AWPA,AWPI,SFPA~0.38 pcf (US)
Florida Questionairre~0.76 pcf
(million ft3/yr)(retention)
= 1,400 metric tons As/yr
Methods: non-CCA
Pesticides


Cattle Dipping Vats
(Historical Use)
MSMA/DSMA/Cacodylic Acid
(Current Use)


Agriculture
Golf Course Use
MSMA/DSMA in
Agriculture
60
50
DSMA
As (tons)
MSMA
40
30
20
10
0
1992
1997
Year
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
MSMA Stored in Golf
Courses


DERM 1999:
16.9 mg/kg
(0 to 1 or 2 ft composites)
Ma et al. 2000: 69.2 mg/kg
Mass = (Surface Area of Golf Courses)
x (Concentration)
Results
As Concentration (ppm)
Rain Water
River Water
Groundw ater
Lakes
Dom.Wastew ater
Petroleum
Surface Soil
Limestone
Coal
P. Rock Fert.
Biosolids, non-Fl
Fish
Shellfish
Phosphate Rock
Biosolids, FL
GolfCourses,DERM
Chicken Feed
Ash, WTE
Golf Courses, Ma
MSMA law ns
Cattle Dip Solution
MSMA cotton
CCA-treated w ood
DSMA concentrate
MSMA concentrate
1000000
100000
10000
1000
100
10
1
0.1
0.01
0.001
0.0001
Hydrosphere
Fuels
Geologic
Sources
Foods
Biosolids
CCA
MSMA/DSMA
Biosolids
Foods
Hydrosphere
Fuels
Geologic
Sources
MSMA/DSMA
CCA
As Flux (metric tons/year)
1600
1400
1200
1000
800
600
400
200
0
Inputs
Conc.
ppm
CCA-Treated Wood
Metric tons
As/yr
3,100
1,400
2,800
1,350
53
490
7
3
200
210
4.4
0.1
110
5
0.0001
0.001
15
45
5.7
6.5
39
0.2
0.4
3.1
MSMA
Agriculture
Golf Courses
Geologic
Phosphate
Limestone
Fuels
Coal
Petroleum
Hydrosphere
Rain
Rivers
Food Sources
Fish
Shellfish
Chicken Manure
SUM
2,500
Outputs
Conc.
ppm
Metric tons
As/yr
Geologic
Phosphate
4.4
110
Rivers
0.001
97
Wastes
Wastewater
WTE Air Emissions
<0.01
<10
0.005
Hydrosphere
Input Flux ~ 2,500 metric tons As/yr
Output Flux ~ 10% of Input
Accessible Reservoir
Conc.
ppm
CCA-Treated Wood
Metric tons As
3,100
24,000
1600 (sol’n)
69
17
1,200
2,500
11,000
4
3
5,000
3,400
0.004
0.002
0.4
110
8,400
2,500
Other Arsenicals
Cattle Dipping
Golf Courses (Ma)
Golf Courses (DERM)
Geologic
Phosphogypsum Stacks
Limestone in Use
Hydrosphere
Lakes
Groundwater
Surface Soil
SUM
47,000-56,000
Summary/Conclusions

Approx. 2,500 metric tons As
imported per yr




CCA-treated wood (60%)
Arsenical pesticides,MSMA (20%)
Geologic Sources (15%)
About 10% of the imported As
is exported  Majority
accumulates over time
Recommendations

In order to limit As impacts



Reduce use of MSMA
Properly dispose CCA-treated
wood
Minimize impacts of CCA-treated
wood currently in service
Questions?
Draft Report posted at
www.ccaresearch.org