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1. ATSDR > Public Health Assessments & Consultations

PUBLIC HEALTH ASSESSMENT

NORTH BRONSON INDUSTRIAL AREA
BRONSON, BRANCH COUNTY, MICHIGAN

APPENDIX A.

FIGURES

Figure 1. Site Location

Figure 2. Site Features

APPENDIX B.

TABLES

 

Table 1.	Contaminants of concern at the North Bronson Industrial Area site.
Table 2.	Chronology of sampling of residential wells near the North Bronson Industrial Area site, 1974-1995.
Table 3.	Cross-reference table for private well identification between this assessment and the remedial investigation (RI) report (Reference).
Table 4.	Concentrations of contaminants of concern found in water from residential and municipal wells within the North Bronson Industrial Area site study area.
Table 5.	Concentrations of contaminants of concern in water from monitoring wells on the North Bronson Industrial Area site study area.
Table 6.	Concentrations of contaminants of concern in surface soil samples collected from the North Bronson Industrial Area site study area in 1991.
Table 7.	Concentrations of contaminants of concern in lagoon berm subsurface soil samples collected from the North Bronson Industrial Area site study area in 1989.
Table 8.	Concentrations of contaminants of concern in subsurface soil samples collected from the North Bronson Industrial Area site study area.
Table 9.	Concentrations of contaminants of concern in surface water from the western lagoons on the North Bronson Industrial Area site.
Table 10.	Concentrations of contaminants of concern in sludge samples collected from the lagoons on the North Bronson Industrial Area site.
Table 11.	Concentrations of contaminants of concern found in water from residential wells near the North Bronson Industrial Area site study area.
Table 12.	Concentrations of contaminants of concern in water from monitoring wells near the North Bronson Industrial Area site.
Table 13.	Concentrations of contaminants of concern in surface soil samples collected near the North Bronson Industrial Area site in 1991.
Table 14.	Concentrations of contaminants of concern (metals only) in subsurface soil samples collected from monitoring well borings near the North Bronson Industrial Area site in 1991.
Table 15.	Concentrations of contaminants of concern in sediment from County Drain # 30 at and near the North Bronson Industrial Area site.
Table 16.	Concentrations of contaminants of concern in surface water from County Drain # 30 near the North Bronson Industrial Area site and from outfalls to the creek from the site.

Table 1. Contaminants of concern at the North Bronson Industrial Area site.

VOLATILE ORGANIC COMPOUNDS	OTHER SEMI-VOLATILE ORGANIC COMPOUNDS
acetone benzene chlorobenzene chloroform 1,1-dichloroethane 1,1-dichloroethylene 1,2-dichloroethylene ethyl benzene methyl ethyl ketone methylene chloride 1,1,1-trichloroethane trichloroethylene vinyl chloride xylenes	benzyl alcohol bis(2-ethylhexyl)phthalate butylbenzylphthalate carbazole 4-chloro-3-methylphenol dibenzofuran 1,4-dichlorobenzene dimethyl phthalate di-n-octylphthalate 4-methylphenol 4-nitrophenol
POLYCYCLIC AROMATIC HYDROCARBONS	METALS AND INORGANIC CHEMICALS
acenaphthylene benzo(a)anthracene benzo(b)fluoranthene benzo(k)fluoranthene benzo(g,h,i)perylene benzo(a)pyrene chrysene dibenzo(a,h)anthracene indeno(1,2,3-cd)pyrene 2-methylnaphthalene naphthalene phenanthrene	antimony arsenic barium beryllium cadmium chromium cobalt copper cyanide lead manganese mercury nickel thallium vanadium zinc
PESTICIDES AND POLYCHLORINATED BIPHENYLS (PCBs)
gamma-BHC delta-BHC heptachlor epoxide PCBs

Table 2. Chronology of sampling of residential wells near the North Bronson Industrial Area site, 1974-1995.

References: 1, 6, 7, 8

See Figure 2 for well locations.

+ -- Well sampled, no volatile organic compound (VOC) contamination found

X -- Well sampled, VOC contamination found

Analysis Performed

1. VOCs, metals, cyanide, bacteria

2. VOCs, semi-VOCs, polychlorinated biphenyls/pesticides, inorganic chemicals

3. VOCs

4. VOCs, general chemistry

5. VOCs, metals, cyanide

Table 3. Cross-reference table for private well identification between this assessment and the remedial investigation (RI) report (Reference 1).

"[The RI contractor's] sample designations for private wells are different between Rounds 1 and 2 because samplers collecting Round 2 samples were unaware of Round 1 designations." (Reference 1, p. 2-4)

Table 4. Concentrations of contaminants of concern found in water from residential and municipal wells within the North Bronson Industrial Area site study area.

Shaded chemicals exceed comparison values

Contaminants of concern that are not listed were not detected

ND -- Not Detected

Comparison Value Bases:

E -- ATSDR Environmental Media Evaluation Guides (EMEGs)
R -- ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from EPA Reference Dose, assuming child ingestion
C -- ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10^-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 5. Concentrations of contaminants of concern in water from monitoring wells on the North Bronson Industrial Area site study area.

Shaded chemicals exceed comparison values

Contaminants of concern that are not listed were not detected

ND -- Not Detected (with Detection Level)
J -- Estimated Value
(III) -- For chromium(III)
(VI) -- For chromium(VI)

NA -- None Available
carcinogen -- Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases:

E -- ATSDR Environmental Media Evaluation Guides (EMEGs)
R -- ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from EPA Reference Dose, assuming child ingestion
C -- ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10^-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)
A -- U.S. EPA Drinking Water Lifetime Health Advisory
PL -- U.S. EPA Proposed Action Level for Lead in Drinking Water

Table 6. Concentrations of contaminants of concern in surface soil samples collected from the North Bronson Industrial Area site study area in 1991.

Reference: 1

Shaded chemicals exceed comparison values

Contaminants of concern that are not listed were not detected

ND -- Not Detected (with Detection Level)
J -- Estimated Value
NA -- None Available

(III) -- For chromium(III)
(VI) -- For chromium(VI)

carcinogen -- Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases:

E -- ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei -- ATSDR Environmental Media Evaluation Guides (EMEGs), intermediate-duration exposure
R -- ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from U.S. EPA Reference Dose, assuming child ingestion
C -- ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 7. Concentrations of contaminants of concern in lagoon berm subsurface soil samples collected from the North Bronson Industrial Area site study area in 1989.

Reference: 1

Shaded chemicals exceed comparison values

Contaminants of concern that are not listed were not detected

ND -- Not Detected
J -- Estimated Value

NA -- None Available

(III) -- For chromium(III)
(VI) -- For chromium(VI)

carcinogen -- Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases:

E -- ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei -- ATSDR Environmental Media Evaluation Guides (EMEGs), intermediate-duration exposure
R -- ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from EPA Reference Dose, assuming child ingestion
C -- ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10^-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

Table 8. Concentrations of contaminants of concern in subsurface soil samples collected from the North Bronson Industrial Area site study area.

Reference: 1

Shaded chemicals exceed comparison values

Contaminants of concern that are not listed were not detected

ND -- Not Detected (with detection limit)
J -- Estimated Value
X -- Total benzo(b)fluoranthene and benzo(k)fluoranthene

NA -- None Available

(III) -- For chromium(III)
(VI) -- For chromium(VI)

carcinogen -- Carcinogen (proven, probable, or possible) but no CREG available

Comparison Value Bases:

E -- ATSDR Environmental Media Evaluation Guides (EMEGs)
Ei -- ATSDR Environmental Media Evaluation Guides (EMEGs), intermediate-duration exposure
R -- ATSDR Reference Dose Media Evaluation Guides (RMEGs), calculated from EPA Reference Dose, assuming child ingestion
C -- ATSDR Cancer Risk Evaluation Guides (CREGs), for 1 x 10-6 estimated excess cancer risk (a significant additional risk of developing cancer is taken to be one additional case of cancer in a population of 1 million people experiencing the exposure)

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