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PUBLIC HEALTH ASSESSMENT

BOHN HEAT TRANSFER FACILITY
BEARDSTOWN, CASS COUNTY, ILLINOIS


TABLES


Table 1.

Average Levels of Chemicals of Interest In Groundwater;1983 Sampling (in ppb).
Chemical G102 G103 G104 G106 G110 Comparison Value
1,1,1-TCA 1,273 775 536 800 ND 200 (MCL)
TCE ND 393 260 62,015 13 5 (MCL)

Table 2.

CERCLIS Inspection Groundwater Chemicals of Interest (in ppb).
Chemical G106 G201 Comparison Value
1,1 -DCE 20 ND 7 (MCL)
DCE 220 ND 70 (MCL)
TCE 520D ND 5 (MCL)

Table 3.

CERCLIS Inspection Soil Contaminants of Interest (in ppb).
Chemical X105 Comparison Value
Benzo(a)anthracene 470 None
Benzo(a)pyrene 260 100 (CREG)
Benzo(b)flouranthene 540 None

NOTES:
ppb = parts per billion
D = Sample diluted.
E = Concentration exceeded the calibration range.
J = Estimated Value.
ND = Not Detected.
MCL = maximum contaminant level
CREG = Cancer Risk Evaluation Guide


Table 4.

Remedial Investigation Groundwater Chemicals of Interest (in ppb).
Chemical Well 901S Well 901D Well902S Well902D Well903S Well903D Well G106 Comparison Value
TCE 410D 54 6 38 180 58 240E 5 (MCL)
DCE 150D 6 ND ND ND ND 130 70 (MCL)
1,1 -DCE 400J ND ND ND ND ND ND 7 (MCL)

Table 5.

Summary of Quarterly Sampling Results for June 1991 (in ppb).
Chemical 901S 902S 903S Comparison Value
1,1 -DCE 7 ND ND 7 (MCL)
TCE 220 4 220 5 (MCL)
DCE 420 ND ND 70 (MCL)

Table 6.

Summary of Quarterly Sampling Results for September 1991 (in ppb).
Chemical 901S 902S 902D 903S Comparison Value
1,1 -DCE 8 ND ND ND 7 (MCL)
1,1 -DCA 8 ND ND ND None
TCE 140 6 5 250 5(MCL)
DCE 270 ND ND ND 70(MCL)

NOTES:
ppb = parts per billion
D = Sample diluted.
E = Concentration exceeded the calibration range.
J = Estimated Value.
ND = Not Detected.


Table 7.

Hydro-punch Groundwater Samples collected March 23, 1993 (in ppb).
Chemical HP5 HP8 HP9 HP18 HP19 Comparison Value
1,1 -DCE ND ND ND ND 7 7 (MCL)
1,1 -DCA ND ND ND ND 32 None
TCE 130 1,300 1,500 3,200 1,400 5 (MCL)
DCE 98 6 150 21 1,200 70 (MCL)

Table 8.

Groundwater Chemicals of Interest in December 1994 (in ppb).
Chemical 901S 902S 903S Comparison Value
1,1 -DCE 25 ND ND 7 (MCL)
1,1 -DCA 44 ND ND None
1,1,1-TCA 620 ND ND 200 (MCL)
TCE 1,300 15 ND 5 (MCL)
DCE 1,100 ND 60 70 (MCL)

NOTES:
ppb = parts per billion
ND = Not Detected.


Table 9.

Groundwater Monitoring Event, November 1997 (in ppb).
Chemical OBGRW-1 OBGRW-2 G901S G902S G903S G921 Comparison Value
1,1 -DCE 2 <100 28 <1 ND 18 7 (MCL)
DCA 1 <100 25 <1 ND 23 None
1,1,1-TCA 46 <100 360 <1 ND 300 200(MCL)
TCE 43 730 670 10 51 670 5 (MCL)
DCE 18 590 290 <1 ND 240 70 (MCL)

Table 10.

Groundwater Monitoring Event, March 1998 (in ppb).
Chemical OBGRW-1 G901S G902S G903S G921 Comparison Value
1,1 -DCE <1 <50 <10 <1 <1 25 7 (MCL)
DCA <1 <50 <10 <1 <1 16 None
TCE 2 580 100 12 38 420 5 (MCL)
DCE <1 460 40 <1 <1 260 70 (MCL)

NOTES:
ppb = parts per billion
ND = Not Detected


Table 11.

Potential Exposure Pathways
Pathway NameSourceMediumExposurePointExposureRouteReceptorPopulationTime ofExposureExposureActivitiesEstimatedNumberExposedChemicals
BeardstownPublic WaterSupplyBohn HeatTransferFacilityGroundwaterTap waterIngestionResidentson PublicWaterSupplyFutureIngestion ofPublicWaterSupply5,270Table 9
Bohn HeatSurface SoilUnknown SoilLoadingDock AreaIngestionInhalationDermal On-siteWorkersFutureWorking with soil onthe site10 Table 3
Bohn Heat Sub-surface SoilBohn HeatTransferFacilitySoilLoadingDock AreaIngestionInhalationDermalOn-siteWorkersFutureExcavationon the site10 Table 3

FIGURES


Figure 1. Location of Bohn Heat Transfer Facility


Figure 2. Groundwater Sampling Results 1982 - 1989


Figure 3. Public Supply Web Field


Figure 4. Residential Well, Monitor Wells, Public Well, Soil Samples


Figure 5. Proposed Ground Water Remediation System Plan


Figure 6. Summary of Analytical Results - Laboratory Confirmation Analysis


ATTACHMENT

Attachment 1

Comparison Values Used In Screening Contaminants For Further Evaluation

Environmental Media Evaluation Guides (EMEGs) are developed for chemicals based on theirtoxicity, frequency of occurrence at National Priority List (NPL) sites, and potential for humanexposure. They are derived to protect the most sensitive populations and are not action levels, butrather comparison values. They do not consider carcinogenic effects, chemical interactions,multiple route exposure, or other media-specific routes of exposure, and are very conservativeconcentration values designed to protect sensitive members of the population.

Reference Dose Media Evaluation Guides (RMEGs) are another type of comparison valuederived to protect the most sensitive populations. They do not consider carcinogenic effects,chemical interactions, multiple route exposure, or other media-specific routes of exposure, andare very conservative concentration values designed to protect sensitive members of thepopulation.

Cancer Risk Evaluation Guides (CREGs) are estimated contaminant concentrations based on aprobability of one excess cancer in a million persons exposed to a chemical over a lifetime.These are also very conservative values designed to protect sensitive members of the population.

Maximum Contaminant Levels (MCLs) have been established by USEPA for public watersupplies to reduce the chances of adverse health effects from contaminated drinking water. Thesestandards are well below levels for which health effects have been observed and take intoaccount the financial feasibility of achieving specific contaminant levels. These are enforceablelimits that public water supplies must meet.

Lifetime Health Advisories for drinking water (LTHAs) have been established by USEPA for drinking water and are the concentration of a chemical in drinking water that is not expected to cause any adverse non-carcinogenic effects over a lifetime of exposure. These are conservative values that incorporate a margin of safety.


CERTIFICATION

This Bohn Heat Transfer Facility Public Health Assessment was prepared by the IllinoisDepartment of Public Health under a cooperative agreement with the Agency for ToxicSubstances and Disease Registry. It is in accordance with approved methodology and proceduresexisting at the time the public health assessment was begun.

Gail D. Godfrey
Technical Project Officer
SPS, SSAB, DHAC, ATSDR

The Division of Health Assessment and Consultation, ATSDR, has reviewed this public healthassessment and concurs with its findings.

Richard Gillig
Chief, SPS, SSAB, DHAC, ATSDR


ATSDR PLAIN LANGUAGE GLOSSARY
OF ENVIRONMENTAL HEALTH TERMS

Absorption: How a chemical enters a person's blood after the chemical has been swallowed, has come into contact with the skin, or has been breathed in.

Acute Exposure: Contact with a chemical that happens once or only for a limited period of time. ATSDR defines acute exposures as those that might last up to 14 days.

Additive Effect: A response to a chemical mixture, or combination of substances, thatmight be expected if the known effects of individual chemicals, seen atspecific doses, were added together.

Adverse Health Effect: A change in body function or the structures of cells that can lead to disease or health problems.

Antagonistic Effect: A response to a mixture of chemicals or combination of substances that is less than might be expected if the known effects of individual chemicals, seen at specific doses, were added together.

ATSDR: The Agency for Toxic Substances and Disease Registry. ATSDR is a federal health agency in Atlanta, Georgia that deals with hazardous substance and waste site issues. ATSDR gives people information about harmful chemicals in their environment and tells people how to protect themselves from coming into contact with chemicals.

Background Level: An average or expected amount of a chemical in a specific environment. Or, amounts of chemicals that occur naturally in a specific-environment.

Biota: Used in public health, things that humans would eat - including animals,fish and plants.

CAP: See Community Assistance Panel.

Cancer: A group of diseases which occur when cells in the body become abnormal and grow, or multiply, out of control

Carcinogen: Any substance shown to cause tumors or cancer in experimental studies.

CERCLA: See Comprehensive Environmental Response, Compensation, and Liability Act.

Chronic Exposure: A contact with a substance or chemical that happens over a long period of time. ATSDR considers exposures of more than one year to be chronic.

Completed Exposure Pathway: See Exposure Pathway.

Community Assistance Panel (CAP): A group of people from the community and health and environmental agencies who work together on issues and problems at hazardous waste sites.

Comparison Value (CVs): Concentrations or the amount of substances in air, water, food, and soil that are unlikely, upon exposure, to cause adverse health effects. Comparison values are used by health assessors to select which substances and environmental media (air, water, food and soil) need additional evaluation while health concerns or effects are investigated.

Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA): CERCLA was put into place in 1980. It is also known as Superfund. This act concerns releases of hazardous substances into the environment, and the cleanup of these substances and hazardous waste sites. ATSDR was created by this act and is responsible for looking into the health issues related to hazardous waste sites.

Concern: A belief or worry that chemicals in the environment might cause harm topeople.

Concentration: How much or the amount of a substance present in a certain amount ofsoil, water, air, or food.

Contaminant: See Environmental Contaminant.

Delayed Health Effect: A disease or injury that happens as a result of exposures that may have occurred far in the past.

Dermal Contact: A chemical getting onto your skin. (see Route of Exposure).

Dose: The amount of a substance to which a person may be exposed, usually on adaily basis. Dose is often explained as "amount of substance(s) per body weight per day".

Dose / Response: The relationship between the amount of exposure (dose) and the change in body function or health that result.

Duration: The amount of time (days, months, years) that a person is exposed to achemical.

Environmental Contaminant: A substance (chemical) that gets into a system (person, animal, or the environment) in amounts higher than that found in Background Level, or what would be expected.

Environmental Media: Usually refers to the air, water, and soil in which chemcials of interest are found. Sometimes refers to the plants and animals that are eaten by humans. Environmental Media is the second part of an Exposure Pathway.

U.S. Environmental Protection Agency (EPA): The federal agency that develops and enforces environmental laws to protect the environment and the public's health.

Epidemiology: The study of the different factors that determine how often, in how many people, and in which people will disease occur.

Exposure: Coming into contact with a chemical substance. (For the three ways people can come in contact with substances, see Route of Exposure.)

Exposure Assessment: The process of finding the ways people come in contact with chemicals, how often and how long they come in contact with chemicals, and the amounts of chemicals with which they come in contact.

Exposure Pathway: A description of the way that a chemical moves from its source (where it began) to where and how people can come into contact with (or get exposed to) the chemical.

ATSDR defines an exposure pathway as having 5 parts:
A. Source of Contamination,
B. Environmental Media and Transport Mechanism,
C. Point of Exposure,
D. Route of Exposure, and
E. Receptor Population.

    When all 5 parts of an exposure pathway are present, it is called a Completed Exposure Pathway. Each of these 5 terms is defined in this Glossary.

Frequency: How often a person is exposed to a chemical over time; for example, everyday, once a week, twice a month.

Hazardous Waste: Substances that have been released or thrown away into the environmentand, under certain conditions, could be harmful to people who come into contact with them.

Health Effect: ATSDR deals only with Adverse Health Effects (see definition in this Glossary).

Indeterminate Public Health Hazard: The category is used in Public Health Assessment documents for sites where important information is lacking (missing or has not yet beengathered) about site-related chemical exposures.

Ingestion: Swallowing something, as in eating or drinking. It is a way a chemical canenter your body (See Route of Exposure).

Inhalation: Breathing. It is a way a chemical can enter your body (See Route of Exposure).

LOAEL: Lowest Observed Adverse Effect Level. The lowest dose of a chemical in a study, or group of studies, that has caused harmful health effects in people or animals.

Malignancy: See Cancer.

MRL: Minimal Risk Level. An estimate of daily human exposure - by a specified route and length of time -- to a dose of chemical that is likely to be without a measurable risk of adverse, noncancerous effects. An MRL should not be used as a predictor of adverse health effects.

NPL: The National Priorities List. (Which is part of Superfund.) A list kept by the U.S. Environmental Protection Agency (EPA) of the most serious, uncontrolled or abandoned hazardous waste sites in the country. An NPL site needs to be cleaned up or is being looked at to see if people can be exposed to chemicals from the site.

NOAEL: No Observed Adverse Effect Level. The highest dose of a chemical in a study, or group of studies, that did not cause harmful health effects inpeople or animals.

No Apparent Public Health Hazard: The category is used in ATSDR's Public Health Assessment documents for sites where exposure to site-related chemicals may have occurred in thepast or is still occurring but the exposures are not at levels expected to cause adverse health effects.

No Public Health Hazard: The category is used in ATSDR's Public Health Assessment documents for sites where there is evidence of an absence of exposure to site-related chemicals.

PHA: Public Health Assessment. A report or document that looks at chemicals at a hazardous waste site and tells if people could be harmed from coming into contact with those chemicals. The PHA also tells if possible further public health actions are needed.

Plume: A line or column of air or water containing chemicals moving from the source to areas further away. A plume can be a column or clouds of smoke from a chimney or contaminated underground water sources or contaminated surface water (such as lakes, ponds and streams).

Point of Exposure: The place where someone can come into contact with a contaminated environmental medium (air, water, food or soil). For examples: the area of a playground that has contaminated dirt, a contaminated spring used for drinking water, the location where fruits or vegetables are grown in contaminated soil, or the backyard area where someone might breathe contaminated air.

Population: A group of people living in a certain area; or the number of people in a certain area.

PRP: Potentially Responsible Party. A company, government or person that is responsible for causing the pollution at a hazardous waste site. PRP's are expected to help pay for the clean up of a site.

Public Health Assessment(s): See PHA.

Public Health Hazard: The category is used in PHAs for sites that have certain physical features or evidence of chronic, site-related chemical exposure that could result in adverse health effects.

Public Health Hazard Criteria: PHA categories given to a site which tell whether people could be harmed by conditions present at the site. Each are defined in the Glossary. The categories are:
A. Urgent Public Health Hazard
B. Public Health Hazard
C. Indeterminate Public Health Hazard
D. No Apparent Public Health Hazard
E. No Public Health Hazard

Receptor Population: People who live or work in the path of one or more chemicals, and who could come into contact with them (See Exposure Pathway).

Reference Dose (RfD): An estimate, with safety factors (see safety factor) built in, of the daily, life-time exposure of human populations to a possible hazard that is not likely to cause harm to the person.

Route of Exposure: The way a chemical can get into a person's body. There are three exposure routes:
- breathing (also called inhalation),
- eating or drinking (also called ingestion), and
- or getting something on the skin (also called dermal contact).

Safety Factor: Also called Uncertainty Factor. When scientists don't have enough information to decide if an exposure will cause harm to people, they use "safety factors" and formulas in place of the information that is not known. These factors and formulas can help determine the amount of a chemical that is not likely to cause harm to people.

SARA: The Superfund Amendments and Reauthorization Act in 1986 amended CERCLA and expanded the health-related responsibilities of ATSDR. CERCLA and SARA direct ATSDR to look into the health effects from chemical exposures at hazardous waste sites.

Sample Size: The number of people that are needed for a health study.

Sample: A small number of people chosen from a larger population (SeePopulation).

Source (of Contamination): The place where a chemical comes from, such as a landfill, pond, creek, incinerator, tank, or drum. Contaminant source is the first part of anExposure Pathway.

Special Populations: People who may be more sensitive to chemical exposures because ofcertain factors such as age, a disease they already have, occupation, sex, or certain behaviors (like cigarette smoking). Children, pregnant women, and older people are often considered special populations.

Statistics: A branch of the math process of collecting, looking at, and summarizingdata or information.

Superfund Site: See NPL.

Survey: A way to collect information or data from a group of people (population). Surveys can be done by phone, mail, or in person. ATSDR cannot do surveys of more than nine people without approval from the U.S. Department of Health and Human Services.

Synergistic effect: A health effect from an exposure to more than one chemical, where one of the chemicals worsens the effect of another chemical. The combined effect of the chemicals acting together are greater than the effects of the chemicals acting by themselves.

Toxic: Harmful. Any substance or chemical can be toxic at a certain dose (amount). The dose is what determines the potential harm of a chemical and whether it would cause someone to get sick.

Toxicology: The study of the harmful effects of chemicals on humans or animals.

Tumor: Abnormal growth of tissue or cells that have formed a lump or mass.

Uncertainty Factor: See Safety Factor.

Urgent Public Health Hazard: This category is used in ATSDR's Public Health Assessment documents for sites that have certain physical features or evidence of short-term (less than 1 year), site-related chemical exposure that could result in adverse health effects and require quick intervention to stop people from being exposed.


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