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Daikin America Decatur Plant
Monitoring
January 15, 2004
Daikin America Decatur Plant
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Monitoring
Background
Air modeling
Surface water/sludge Groundwater/soil
Next steps
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EXP000163
Daikin America Decatur Plan
Background
Daikin completed original construction o
the facility in 1993
Fluoropolymer manufacturing operations started in early 1994
Telomer finishing facility constructed in 2000 and commercial production started 2001
Daikin America Decatur Plan
Stack Monitoring /Air Dispersion Mode
Dispersion modeled using the EPA approved industrial source complex short term 3 (ISCSTS
model The 12-month period between October 5, 2002
e
and October 4, 2003 was selected to assess ambient impacts resulting from actual emission
of PFQA from Daikin5 s operations PFOA emissions during this period was 397
pounds
Daikin America Decatur Plan
Dispersion Modeling Results
Daikin
contribution only
Fence line |Lig/m3
0.13
3M/Daik
Property Bo j^g/m
0.02
Daikin and Dyneon Cumulative
0.13
0.02
Based on Daikin emission rate of 397 pounds in 1 year p
Daikin America Decatur Plan
Monitoring - Surface Water and Slud
Two effluent points
- Effluent to Tennessee river from Fluoropolyme
process
- Outfall to POTW from Telomer Finishing pro
Wastewater treatment sludge to subpart D landfill
s e Storm water runoff - 2 locations
T3
0 0 0
a> -i
"sy
Daikin America Decatur Plant Monitoring - Groundwater/Soi
Six points selected based on likely groundwater flow in subsurface above
limestone bedrock
Wells drilled and sampled in November 20 Only 2 of 6 wells produced water. During the drilling of the wells, soil sample
were taken every 5 feet down to groundwa Split spoon sampler
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Daikin America Decatur Plan
Monitoring - Soils
Preliminary Results (ppb)
Depth
(Feet)
0
MW-1
530
MW-2 1165
MW-3
NR
MW-4 22.7
MW-5 48.9
MW-6 52.2
5
NR
3200 416
73.8
9.69
163
10
111
60.8
41.8
770
205
954
15
47.8
39.3
416
88.4
596
20
50.1
30.3
121
259
183
25
79.1
NR
138
86.4
30
76.4
49.0
35
25.1
MNPR> - MNo- !R-e>c.o.v-e.r-y.
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Daikin America Decatur Plan
Monitoring - Soils
No clear pattern
Potential sources of contamination ? - Land application of sludge - Deposition from air emissions
Daikin America Decatur Plant
Next Steps
- Air releases
Considering air deposition monitoring Substantial reduction in air emissions
- Surface water
Monitor storm water runoff - 2 locations Continue effluent monitoring
- Soils/groundwater
Better characterize hydrogeology Additional groundwater monitoring Additional soil monitoring