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PUBLIC HEALTH ASSESSMENT

BRUNO COOP & ASSOCIATED PROPERTIES
BRUNO, BUTLER COUNTY, NEBRASKA


APPENDIX A

SITE MAP


Figure 1. Site Area Map



APPENDIX B

CONTAMINANT AND PATHWAY TABLES

Data Table Abbreviations
ppb
µg/m3
ND
J
M
CREG
parts per billion
micrograms per cubic meter
not detected
estimated value
compound qualitatively identified
cancer risk evaluation guide



Table 1.

GROUNDWATER: FORMER MUNICIPAL SYSTEM AND BACKGROUND PRIVATE WELL -- 1984 THROUGH 1989
ContaminantMaximum
Concentration
ppb
Sample
Date
ReferenceComparison Value
ppb Source
Carbon Tetrachloride
Public water system
    Well 30185
    Well 30184
    Tap
    Fire Hall
    Public school
    Post Office
    Residence
    Location unknown
Background private well



38.5
39
ND
27.1
29
28
28
40.1
ND



1988
1986
1987
1989
1988
1988
1988
1984
1987



(5)
(2)
(2)
(5)
(2)
(2)
(2)
(2)
(2)
0.3CREG
Chloroform
Public water system
    Well 30185
    Well 30184
    Tap
    Fire Hall
    Public school
    Post office
    Residence
    Location unknown
Background private well



12J
93*
ND
2.1
12M
4.0M
3.9M
4.2
ND



1988
1988
1987
1989
1988
1988
1988
1984
1987



(2)
(2)
(2)
(5)
(2)
(2)
(2)
(2)
(2)
6CREG
1,2-Dichloroethane
Public water system
    Well 30185
    Well 30184
    Tap
    Fire Hall
    Public school
    Post office
    Residence
    Location unknown
Background private well



16
5.9
ND
8.0
13
13
11
7.3
ND



1988
1986
1987
1989
1988
1988
1988
1984
1987



(2)
(2)
(2)
(5)
(2)
(2)
(2)
(2)
(2)
0.4CREG
Bromodichloromethane
Sample sources not clearlydefined
ND1988(2)0.3CREG

* a previously used chlorine treatment system may have contributed substantively to thisconcentration




Table 2.

SOIL GAS DATA -- 1988
ContaminantConcentration
Range
µg/m3
Comparison Value
µg/m3Source
Carbon tetrachloride
Grain storage area
Beyond grain storage area

ND to 370
ND
0.07CREG

Reference (2)




Table 3.

GROUNDWATER, NEW MUNICIPAL WELLS -- AFTER 1990
ContaminantMaximum
Concentration
ppb
Sample
Date
Comparison Value
ppbSource
Carbon tetrachloride
Public water system
    Well 12302891
    Well 12302982



ND
ND



1991, 1993
1991, 1993
0.3CREG
Chloroform
Public water system
    Well 12302891
    Well 12302892



ND
ND



1991, 1993
1991, 1993
6CREG
1,2 Dichloroethane
Public water system
    Well 12302891
    Well 12302892



ND
ND



1991, 1993
1991, 1993
0.4CREG
Bromodichloromethane
Public water system
    Well 12302891
    Well 12302892



ND
0.6 & ND



1991, 1993
1991, 1993
0.3CREG

Reference (5)



Table 4.

PRINCIPAL COMPLETED AND POTENTIAL EXPOSURE PATHWAYS
COMPLETED
PATHWAY
NAME
COMPLETED EXPOSURE PATHWAY ELEMENTSTIME
SOURCEMEDIUMPOINT OF
EXPOSURE
ROUTE OF
EXPOSURE
EXPOSED
POPULATION
former public
wells
fumigantchemicals,chlorinationprocessgroundwaterresidences
businesses
ingestion
inhalation
skin contact
residents
workers
visitors
past
fumigantchemicalsfumigantchemicalsair, chemicalsgrain storage unitsinhalation
skin contact
ingestion
fumigant applierspast


POTENTIAL
PATHWAY
NAME
POTENTIAL EXPOSURE PATHWAY ELEMENTSTIME
SOURCEMEDIUMPOINT OF
EXPOSURE
ROUTE OF
EXPOSURE
EXPOSED
POPULATIONN
private wellsfumigant
chemicals
groundwaterresidencesingestion
inhalation
skin contact
residentspast
present
future
soil gasfumigant
chemicals
soil gasresidencesinhalationresidentspast
present
future



Table 5.

ESTIMATED POPULATIONS -- PRINCIPAL COMPLETED AND POTENTIAL EXPOSURE PATHWAYS
Estimated Exposed and Potentially Exposed PopulationsContaminants and Media:
DescriptionNumbercarbon
tetrachloride
chloroform1-2-dichloro-
ethane
bromodichloro-
methane
Past town residents, workers, visitors presume lessthan 300 totalgroundwatergroundwatergroundwater
Past fumigant applierspresume lessthan 25 totalair


Present/future private well users nearby andin townpresume lessthan 30 totalgroundwatergroundwatergroundwater
Residents near storage areaunknownsoil gassoil gassoil gas


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