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PRELIMINARY PUBLIC HEALTH ASSESSMENT

NATIONAL SOUTHWIRE ALUMINUM COMPANY
HAWESVILLE, HANCOCK COUNTY, KENTUCKY


APPENDIX A -- SITE MAPS


Figure 1. Site Location Map


Figure 2. Site Layout Map



APPENDIX B -- CONTAMINATION DATA

Data tables include several abbreviations for identifying sourcesand for clarifying information:


Comparison Values Abbreviations
* RFDG Reference Dose-based Guide
* LTHA Lifetime Health Advisory
* MCL Maximum Contaminant Level
* TLVG Threshold Limit Value Guide


Clarifying Abbreviations
* ppm parts per million
* ND contaminant not detected
* NA contaminant not analyzed for
* NI no information about contaminant
* N.F.D. contaminant not further defined
* J estimated value
* N presumed evidence of material
* < less than
* NTP National Toxicology Program

Note that contaminants detected in any one medium are listed in tables for all media--including those media for which the contaminant was not detected, or not analyzed for, or no information was obtained.



Table 2.

Contaminant Concentrations in Particles Captured via Electrostatic Precipitator
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum23,000 - 31,000
(4)
unk* none ----
ArsenicNI--- ---- ----
CobaltNI---- ---- ----
Cyanides (all)NI---- ---- ----
Fluoride13,000 - 16,000
(4)
unk* none ----
LeadNI---- ---- ----
ManganeseNI---- ---- ----
Nickel600 - 1,200
(4)
unk* none ----
PolychlorinatedbiphenylsNI---- ---- ----
* Date unknown




Table 3.

Contaminant Concentrations in Process Waste Water
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum0.044 - 1.12
(5)(6)
1989
1990
none ----
ArsenicND (5)1989 ---- ----
CobaltNI---- ---- ----
Cyanide, total0.16 - 0.8
(5)(7)
1986
to
1991
none ----
Cyanide, amenableto chlorination0.16 - 0.68
(5)(7)
1986
to
1991
none ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.NI---- ---- ----
Fluoride0.68 - 0.74
(5)(7)
1989
1990
none ----
LeadND - 0.052
(5)(7)
1986
to1991
none ----
Manganese0.02 - 1.53
(5)(7)
1989
1990
none ----
Nickel0.005 - 0.029
(5)(7)
1986
to
1991
none ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR does not know whether samples were filtered orunfiltered




Table 4.

Contaminant Concentrations in On-site Pond Sediment
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumNI ---- ---- ----
Arsenic4.1 (8)1986 none ----
CobaltNI ---- ---- ----
Cyanides (all)NI---- ---- ----
FluorideNI---- ---- ----
Lead16.5 (8)1986 none ----
ManganeseNI---- ---- ----
NickelNI---- ---- ----
PolychlorinatedbiphenylsNI---- ---- ----





Table 5.

Contaminant Concentrations in On-site Pond Water
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI ---- ---- ----
ArsenicNI---- ---- ----
CobaltNI ---- ---- ----
Cyanide, total165 * (8)1986 none ----
Cyanide, amenableto chlorination101 * (8)1986 none ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.NI---- ---- ----
FluorideNI---- ---- ----
LeadNI---- ---- ----
ManganeseNI---- ---- ----
NickelNI---- ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
* For North Pond prior to its closure in 1986
ATSDR not know whether sample was filtered or unfiltered.




Table 6.

Contaminant Concentrations in On-site Air
A. Ambient Air Quality
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumNI
---- ----
ArsenicNI
---- ----
CobaltNI
---- ----
Cyanides (all)NI
---- ----
FluorideDaily Values
0.00007 to
0.0045
(9)

Average
Monthly
Values

0.00023 to
0.0008
(9)

1987
thru
1991
0.0076 ppmTLVG
LeadNI
---- ----
ManganeseNI
---- ----
NickelNI
---- ----
Polychlorinated biphenylsNI
---- ----



B. Potroom Air Quality

Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
Fluoride0.081-0.26 (10)1993 0.0076
(approximate
value)
TLVG





Table 7.

Contaminant Concentrations in On-site Surface Soils
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
Aluminum3,500-130,000 (1)1989 none ----
ArsenicND - 8.6J (1)1989 210 RFDG
Cobalt5.2 - 10 (1)1989 none ----
Cyanide, totalND (1)1989 ---- ----
Cyanideamenable tochlorinationNI---- ---- ----
Cyanide, freeor solubleND (1)1989 ---- ----
Cyanide,N.F.D.NI---- ---- ----
Fluoride29 - 64,000 (1)1989 42,000 RFDG
LeadND - 250J (1)1989 none ----
Manganese260J - 8,000 (1)1989 70,000 RFDG
Nickel14 - 260 (1)1989 14,000 RFDG
Polychlorin-ated biphenylsND - 1.48 & 48* **
(1)(3)
1989
1992
0.1 CREG
* NSA reported to ATSDR that 48 ppm is the maximum found in surface soils in the temporary soil storage area, which will be remediated;1.48 ppm is the maximum in surface soils elsewhere.
** NSA reported that 8,940 ppm is the maximum found in subsurfacesoils in a foundation excavation; 120 ppm is the maximum in subsurface soils elsewhere, found at the dump pad (1)(3).



Table 8.

Contaminant Concentrations in On-site Drinking Water Wells
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumND
(1)
1989
1990
---- ----
ArsenicND
(1)
1989
1990
---- ----
CobaltND
(1)
1989
1990
--- ----
Cyanide, totalO.01 - 0.13*
(1)(8)(11)
1986
to
1991
0.7 RFDG
Cyanide, amenableto chlorination0.01 (8)1986 0.7 RFDG
Cyanide, free orsolubleND
(1)
1989
1990
0.7 RFDG
Cyanide, N.F.D.0.021 - 0.108
(1)(11)
1985
1989
1990
0.7 RFDG
FluorideO.25J
(1)
1989
1990
2.1 RFDG
LeadND (1)(8)1986 ---- ----
ManganeseO.35
(1)
1989
1990
3.5 RFDG
NickelND
(1)
1989
1990
---- ----
PolychlorinatedbiphenylsNI---- ---- ----
* Tap water ranged from about 0.05 to 0.09 from 1987 to 1991.Samples reported in Reference (1) were not filtered. ATSDR notknow whether other samples were filtered or unfiltered.




Table 9.

Contaminant Concentrations in On-site Wells other than Drinking Water Wells
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
Aluminum0.73 - 16
(1)
1989
1990
none ----
Arsenic0.011 - 0.029
(1)
1989
1990
0.003 RFDG
Cobalt0.023 - 0.26
(1)
1989
1990
none ----
Cyanide, totalND - 115
(1)(8)(11)(12)(13)
1979
1986
1987
to
1991
0.2 RFDG
Cyanide, amenableto chlorination0.006 - 1.4
(8)
1986 0.2 RFDG
Cyanide, free orsolubleND - 0.32
(1)(11)
1985
1989
1990
0.2 RFDG
Cyanide, N.F.D.ND - 7.25
(12)
1979 0.2 RFDG
Fluoride0.24J - 1,770
(1)(12)
1979
1989
1990
0.6 RFDG
LeadND - 0.073
(1)(8)
1986
1989
1990
noneNTP/
EPA
Carci-
nogen
Manganese0.24 - 8.4
(1)
1989
1990
1.0 RFDG
NickelND - 3.0
(1)
1989
1990
0.1 LTHA
PolychlorinatedbiphenylsNI---- ---- ----
Samples reported in Reference (1) were not filtered. ATSDR notknow whether other samples were filtered or unfiltered.




Table 10.

Contaminant Concentrations in On-site Drainage Ditch Water
Contaminant Concentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumND - 47
(1)(5)(6)
1989
1990
none ----
ArsenicND - 0.13
(1)(5)
1989
1990
none ----
CobaltND
(1)
1989
1990
---- ----
Cyanide, totalND - 0.2
(1)(5)(6)
1989
1990
none ----
Cyanide, amenableto chlorinationND - 0.15
(1)(5)
1989
1990
none ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI---- ---- ----
FluorideO.29 - 5,140
(1)(5)(6)
1989
1990
none ----
LeadND - 0.12
(1)(5)(6)
1989
1990
none ----
ManganeseND - 0.49
(1)(5)(6)
1989
1990
none ----
NickelND - 1.8
(1)(5)(6)
1989
1990
none ----
PolychlorinatedbiphenylsND
(1)
1989
1900
---- ----
Samples reported in Reference (1) were not filtered. ATSDR notknow whether other samples were filtered or not filtered.




Table 11.

Contaminant Concentrations in On-site Drainage Ditch Sediment
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum17,000 -270,000 (1)1989
1990
none ----
Arsenic12J - 160JN
(1)(5)
1989
1990
none ----
Cobalt10 - 37
(1)
1989
1990
none ----
Cyanide, totalND - 6.1
(1)
1989
1990
none ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI---- ---- ----
Fluoride10 - 236,000
(1)(5)
1989
1990
none ----
LeadND - 170J
(1)(5)
1989
1990
none ----
ManganeseND - 1,700
(1)
1989
1990
none ----
Nickel18 - 1,400
(1)
1989
1990
none ----
PolychlorinatedbiphenylsND
(1)
1989
1990
---- ----





Table 12.

Contaminant Concentrations in On-site Vegetation
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicNI---- ---- ----
CobaltNI---- ---- ----
Cyanides (all)NI---- ---- ----
Fluoride3.39 - 271.19
(14)
1982thru
1990
none ----
LeadNI---- ---- ----
ManganeseNI---- ---- ----
NickelNI---- ---- ----
Polychlorinated biphenylsNI---- ---- ----





Table 13.

Contaminant Concentrations in Off-site Ambient Air
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicNI---- ---- ----
CobaltNI---- ---- ----
Cyanides (all)NI---- ---- ----
FluorideDaily Values
0.000012 to
0.0053
(9)

Average
Monthly Values

0.00014 to
0.00082
(9)

1987
through
1991
0.0076TLVG
LeadNI---- ---- ----
ManganeseNI---- ---- ----
NickelNI---- ---- ----
Polychlorinated biphenylsNI---- ---- ----





Table 14.

Contaminant Concentrations in Off-site Surface Soils
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumND - 7,100
(1)
1989
1990
none ----
ArsenicND - 20J
(1)
1989
1990
15 RFDG
CobaltND - 7.3
(1)
1989
1990
none ----
Cyanide, totalND (1)1989
1990
---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI---- ---- ----
FluorideND - 82J
(1)
1989
1990
3,000 RFDG
LeadND
(1)
1989
1990
---- ----
ManganeseND - 310J
(1)
1989
1990
5,000 RFDG
NickelND - 14
(1)
1989
1990
1,000 RFDG
PolychlorinatedbiphenylsND
(1)
1989
1990
---- ----





Table 15.

Contaminant Concentrations in Off-site Ground-water Monitoring Wells
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum0.49 - 21
(1)
1989
1990
none ----
ArsenicND - 0.014
(1)
1989
1990
0.003 RFDG
CobaltND - 0.11
(1)
1989
1990
none ----
Cyanide, totalND
(1)
1989
1990
---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI ---- ---- ----
FluorideND
(1)
1989
1990
---- ----
Lead0.005 - 0.11
(1)
1989
1990
noneNTP/
EPA
Carci-
nogen
Manganese0.087 - 8.6
(1)
1989
1990
1.0 RFDG
NickelND - 0.12
(1)
1989
1990
0.1 LTHA
PolychlorinatedbiphenylsND
(1)
1989
1990
---- ----
Samples were not filtered.




Table 16.

Contaminant Concentrations in Hawesville, Kentucky, Well System
Contaminant Concentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicND - 0.007
(15)(16)
1987
19901991
0.003 RFDG
CobaltNI---- ---- ----
Cyanide, totalNI---- ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.ND (16)1991 ---- ----
Fluoride1.2 - 1.57
(15)(16)
1990
1991
0.6 RFDG
LeadND - 0.002
(15)(16)
1987
1990
1991
noneNTP/
EPA
Carci-
nogen
Manganese0.62 (16)1987 1.0 RFDG
NickelND (15)1991 ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 17.

Contaminant Concentrations in Tell City, Indiana, Well System
ContaminantConcentration
ppm
(Reference)
YearComparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicND - 0.0002
(15)(17)
19861991 0.003 RFDG
CobaltNI---- ---- ----
Cyanide, totalNI---- ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.ND (15)1991 ---- ----
Fluoride0.2 - 1.19
(15)(17)
1975
1985
1986
1991
0.6 RFDG
LeadND
(15)(17)
1986
1991
---- ----
Manganese0.2 - 0.36
(17)
1975
1982
1986
1.0 RFDG
NickelND (15)1991 ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 18.

Contaminant Concentrations in Cannelton, Indiana, Well System
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNA (17)1989 ---- ----
ArsenicND - 0.0002
(15)(17)
1979
1982
19891991
0.003 RFDG
CobaltNA (17)1989 ---- ----
Cyanide, totalNI---- ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.ND (15)1991 ---- ----
Fluoride0.1 - 1.37
(15)(17)
1979
1982
1986
1989
1991
0.6 RFDG
LeadND
(15)(17)
1979
1982
1987
1989
1991
---- ----
ManganeseND - 0.11
(17)
1979
1982
1986
1989
1.0 RFDG
NickelND (15)1991 ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 19.

Contaminant Concentrations in Troy, Indiana, Well System
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicND
(15)(17)
1979
1982
1991
---- ----
CobaltNI---- ---- ----
Cyanide, totalNI---- ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.ND (15)1991 ---- ----
Fluoride0.09 - 0.3
(15)(17)
1979
1982
1991
0.6 RFDG
LeadND
(15)(17)
1979
1982
1987
1991
---- ----
Manganese0.03 - 0.19
(17)
1979
1982
1.0 RFDG
NickelND (15)1991 ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 20.

Contaminant Concentrations in Lewisport, and East Daviess, Kentucky, Well Systems
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicND (15)1991 ---- ----
CobaltNI---- ---- ----
Cyanide, totalNI---- ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleNI---- ---- ----
Cyanide, N.F.D.ND (15)1991 ---- ----
Fluoride1.25 - 1.54 (15)1991 0.6 RFDG
LeadND (15)1991 ---- ----
ManganeseNI1991 ---- ----
NickelND (15)1991 ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 21.

Contaminant Concentrations in Off-site Private Drinking Water Wells
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumND
(1)(18)
1988
1989
1990
---- ----
ArsenicND - 0.004
(1)(18)
same asabove 0.003 RFDG
CobaltND
(1)(18)
same asabove ---- ----
Cyanide, totalND
(1)(18)
same asabove ---- ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)(18)
same asabove ---- ----
Cyanide, N.F.D.ND (18)1988 ---- ----
Fluoride0.19J
(1)(18)
1988
1989
1990
0.6 RFDG
LeadND - 0.005
(1)(18)
same asabove noneNTP/
EPA
Carci-
nogen
ManganeseND
(1)(18)
same asabove ---- ----
NickelND
(1)(18)
same asabove ---- ----
PolychlorinatedbiphenylsND
(1)(18)
same asabove ---- ----
Samples reported in Reference (1) were not filtered. ATSDR notknow whether other samples were filtered or not filtered.




Table 22.

Contaminant Concentrations in Off-site Ohio River Water
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum11.6 upstream
0.74 downstream
(5)
1989 none ----
Arsenic0.002 upstream
ND downstream
(5)
1989 0.003 RFDG
CobaltNI ---- ---- ----
Cyanide, totalND upstream
ND downstream
(5)
1989 ---- ----
Cyanide, amenableto chlorinationNI ---- ---- ----
Cyanide, free orsolubleNI ---- ---- ----
Cyanide, N.F.D.<0.03 (13)1986 0.2 RFDG
Fluoride15.2 upstream
0.12 downstream
(5)
1989 0.6 RFDG
Lead0.003 upstream
0.002 downstream
(5)
1989 noneNTP/
EPA
Carci-
nogen
Manganese0.23 upstream
0.19 downstream
(5)
1989 1.0 RFDG
Nickel0.03 upstream
ND downstream
(5)
1989 0.1 LTHA
PolychlorinatedbiphenylsNI ---- ---- ----
ATSDR not know whether samples were filtered or unfiltered.




Table 23.

Raw Water and Finished Water, Evansville, Indiana, Public Drinking Water
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumR = 1.3
F = NI - 0.23
(19)
1989 none ----
ArsenicR = 0.0024
F = ND - 4E-4
(19)
1983
1985
1988
1989
0.003 RFDG
CobaltNI---- ---- ----
Cyanides (all)NI---- ---- ----
FluorideR = 0.2
F = 0.9 - 1.0
(19)
1983
1985
1988
1989
1990
0.6RFDG
LeadR = ND
F = ND
(19)
1983
1985
1988
1989
1990
---- ----
ManganeseR = 0.17
F = ND - 0.01
(19)
1983
1985
1988
1989
1990
1.0 RFDG
NickelNI---- ---- ----
PolychlorinatedbiphenylsNI---- ---- ----
      R = raw water       F = finished (treated) water
ATSDR not know whether samples were filtered or unfiltered.




Table 24.

Contaminant Concentrations in Off-site Drainage Ditch Water
Contaminant Concentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumND
(1)
1989
1990
---- ----
ArsenicND
(1)
1989
1990
---- ----
CobaltND
(1)
1989
1990
---- ----
Cyanide, total0.19J
(1)
1989
1990
none ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI---- ---- ----
Fluoride0.32J
(1)
1989
1990
none ----
LeadND
(1)
1989
1990
---- ----
Manganese0.41
(1)
19891990 none ----
NickelND
(1)
1989
1990
---- ----
PolychlorinatedbiphenylsND
(1)
1989
1990
---- ----
Samples were not filtered




Table 25.

Contaminant Concentrations in Off-site Drainage Ditch Sediment
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
Aluminum10,000
(1)
1989
1990
none ----
Arsenic12J
(1)
1989
1990
none ----
Cobalt9.9
(1)
1989
1990
none ----
Cyanide, total7.7
(1)
1989
1990
none ----
Cyanide, amenableto chlorinationNI---- ---- ----
Cyanide, free orsolubleND
(1)
1989
1990
---- ----
Cyanide, N.F.D.NI---- ---- ----
Fluoride54
(1)
1989
1990
none ----
Lead69J
(1)
1989
1990
none ----
Manganese340J
(1)
1989
1990
none ----
Nickel16
(1)
1989
1990
none ----
PolychlorinatedbiphenylsND
(1)
1989
1990
---- ----





Table 26.

Contaminant Concentrations in Off-site Vegetation
ContaminantConcentration
ppm
(Reference)
Year Comparison Value
ppmSource
AluminumNI---- ---- ----
ArsenicNI---- ---- ----
CobaltNI---- ---- ----
Cyanides (all)NI---- ---- ----
Fluoride0.40 - 252.0
(14)
1982thru
1990
none ----
LeadNI---- ---- ----
ManganeseNI---- ---- ----
NickelNI---- ---- ----
Polychlorinated biphenylsNI---- ---- ----



Table 27.

Contaminant Concentrations in Ohio River Fish
Taken from Cannelton Lock and Dam Area
(Sheet 1 of 2)
Contaminant Concentration
ppm
(Reference)
Year Comparison
Value
ppmSource
Aluminum, Arsenic,Cobalt, Cyanides,Fluoride, Lead,Manganese, NickelNI-------- ----
Polychlorinated biphenylsCarp
0.18 - 0.27 (20)


Catfish
0.29 - 3.3 (20)


Freshwater Drum
0.64 (20)

Smallmouth Buffalo
0.91 (20)

Paddlefish fillets
0.23 - 0.53 (20)

Paddlefish eggs
0.48 - 0.73 (20)

1987
1989
1990

1987
1989
1990

1990


1990


1990
1991

1990
1991






0.008





CREG

(Table Continued)


Table 27 (Continued)
(Sheet 2 of 2)
Contaminant Concentration
ppm
(Reference)
YearComparison
Value
ppmSource
ChlordaneCarp
<0.1 - 0.08 (19)


Catfish
<0.1 - 0.46 (19)


Freshwater Drum
0.15 (19)

Smallmouth Buffalo
<0.1 (19)

Paddlefish fillets
0.12 - 0.24 (19)

Paddlefish eggs
0.06 - 0.51 (19)

1987
1989
1990

1987
1989
1990

1990


1990


1990
1991

1990
1991









0.001








CREG



APPENDIX C -- PUBLIC COMMENTS

RESPONSE TO COMMENTS RECEIVED DURING PUBLIC COMMENT PERIOD

The National Southwire Aluminum Company Preliminary Public Health Assessment was available for public review and comment from March 3, 1993 through April 20, 1993. The public comment period was announced in local newspapers. Copies of the preliminary public health assessment were made available for review at the public libraries in Hawesville, Kentucky, and in Tell City, Indiana. In addition, the preliminary public health assessment was sent to more than 12 individuals or organizations. Comments were received from two individuals, and the U.S. Environmental Protection Agency (EPA). A summary of those comments along with our responses are presented in this section. The body of the document has been revised where appropriate.

COMMENT: Two people wrote that they attended the public meeting called by the Environmental Protection Agency (EPA) on January 19, 1993, where they and some other residents raised concerns about the safety of eating beef from livestock grazed on vegetation, and produce grown near the site. Other concerns included safety of the drinking water, and of living in the area. One of the people further wrote that her husband, the only resident who attended the ATSDR availability sessions had reported his family's health problems to the ATSDR official at that meeting but no reference was made to the family's health problem in the preliminary public health assessment.

Response: The initial release of the preliminary public health assessment was issued prior to the EPA meeting and could not reflect information from that meeting. In addition, the only resident who attended the ATSDR availability session on December 11, 1991, said that he did not feel that he was endangered by the site but wondered whether he was. He said his family lived in the area for since 1979. He also wondered whether his wife's multiple sclerosis is site-related. ATSDR has identified that issue as a community concern and addressed it in the final document. The resident also asked about another health issue that by its nature was initiated prior to moving to the area. Thus, that ailment is not addressed in the document.

COMMENT:

The second to the last sentence of paragraph 2 of the Summary section implies that the NSA site contaminated the drinking water supplies of these cities and clearly affirms that residents were exposed to site-related contaminants. However, the EPA does not have any information or evidence to conclude that the site has contaminated any municipal water supply.

Response:

Information in the summary and other sections indicate that residents were exposed to various contaminants in municipal drinking water at levels below public health concern. In addition, the last sentence of the second paragraph concludes that the sources of contaminants in the drinking water cannot be defined. Therefore, the document has not been changed.

COMMENT:

The second paragraph (Page 1, first sentence of the second paragraph of the Summary section) also contains a discussion of on-site workers being exposed to fluoride through incidental soil ingestion "at levels that could cause adverse health effects." This discussion does not mention the limited areas on site that an exposure could occur or the previous remedial efforts undertaken by NSA to reduce the fluoride concentrations in surface soils or near impoundments.

Response: The first sentence in paragraph 2 of the Summary section states that only those on-site workers such as maintenance, construction, or remedial workers who are, or have been in the past, in close contact with surface soil and other workers at the waste areas were probably exposed to fluoride through incidental ingestion. ATSDR has no information about NSA remediation efforts that specifically identifies the extent to which fluoride concentrations may have been reduced over time in surface soils or near impoundments. Thus, we cannot address that issue in the summary or elsewhere in the document. ATSDR has acknowledged in the Background section of the document that some waste ponds have been closed, but some were opened to replace those that were closed, and some of the latter are not closed. ATSDR has described excavation and temporary storage of soils containing PCBs; those are to be disposed off site. The only other soil remediation of which ATSDR is aware occurred around the spent potliner storage pad where several hundred tons of soil were removed and disposed of off site at approved landfills. ATSDR has seen cyanide data for the excavated soils but is not aware of any fluoride analyses for those materials (33). Therefore, the document has not been changed.

COMMENT:

The summary should mention that upon completion of the Remedial Investigation (RI), the EPA will conduct a Baseline Risk Assessment to quantify (estimate) the human health risks posed by the contaminants found at the site.

Response:

The second to the last sentence on page 2 of the Summary section states that if additional data and information become available, ATSDR will reevaluate the site for any indicated followup. In addition, the Public Health Action Plan (PHAP), and the Summary have been changed to identify the RI and EPA's forthcoming risk assessment work.



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