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PUBLIC HEALTH ASSESSMENT

LORING AIR FORCE BASE
LIMESTONE, AROOSTOOK COUNTY, MAINE


APPENDICES



Table 1.

ATSDR Public Health Assessment Hazard Categories
Category Definition Criteria
A. Urgent public health hazard This category is used for sites that pose an urgent public health hazard as the result of short-term exposures to hazardous substances. evidence exists that exposures have occurred, are occurring, or are likely to occur in the future AND
estimated exposures are to a substance(s) at concentrations in the environment that, upon short-term exposures, can cause adverse health effects to any segment of the receptor population AND/OR
community-specific health outcome data indicate that the site has had an adverse impact on human health that requires rapid intervention AND/OR
physical hazards at the site pose an imminent risk of physical injury
B. Public health hazard This category is used for sites that pose a public health hazard as the result of long-term exposures to hazardous substances. evidence exists that exposures have occurred, are occurring, or are likely to occur in the future AND
estimated exposures are to a substance(s) at concentrations in the environment that, upon long-term exposures, can cause adverse health effects to any segment of the receptor population AND/OR
community-specific health outcome data indicate that the site has had an adverse impact on human health that requires intervention
C. Indeterminate (potential) public health hazard This category is used for sites with incomplete information. limited available data do not indicate that humans are being or have been exposed to levels of contamination that would be expected to cause adverse health effects; data or information are not available for all environmental media to which humans may be exposed AND
there are insufficient or no community-specific health outcome data to indicate that the site has had an adverse impact on human health
D. No apparent public health hazard This category is used for sites where human exposure to contaminated media is occurring, has occurred in the past, (or could occur in the future), but the exposure is below, (or expected to be below), a level of health hazard. exposures do not exceed an ATSDR chronic MRL or other comparable value AND
data are available for all environmental media to which humans are being exposed AND
there are no community-specific health outcome data to indicate that the site has had an adverse impact on human health
E. No public health hazard This category is used for sites that do not pose a public health hazard. no evidence of current or past human exposure to contaminated media
AND
future exposures to contaminated media are not likely to occur
AND
there are no community-specific health outcome data to indicate that the site has had an adverse impact on human health


APPENDIX B
Site Status for Loring Air Force Base Installation Restoration Program

The following appendix was not available in electronic format for conversion to HTML at the time of preparation of this document. To obtain a hard copy of the document, please contact:

Agency for Toxic Substances and Disease Registry
Division of Health Assessment and Consultation
Attn: Chief, Program Evaluation, Records, and Information Services Branch, E-56
1600 Clifton Road NE, Atlanta, Georgia 30333

APPENDIX C

Risk Calculations for Ingesting Fish from Waters on or near Loring AFB:


Exposure Parameters and Values Used to Calculate Risks for Fish Ingestion
EXPOSURE PARAMETER SYMBOL VALUE UNITS
Concentration in Fish Filet CFF Average mg/kg
Ingestion Rate - Adult IRA 0.227 kg/meal
Body Weight - Adult BWA 70 kg
Exposure Frequency EF 52 meals/year
Exposure Duration - Adult EDA 24 years
Averaging Time, Cancer AT 70 years

To evaluate the cancer risk from ingesting fish from the Little Madawaska River (LMR):

CR = Intake x CSF; where CSF denotes Cancer Slope Factor, and CR denotes cancer risk

Intake =

CFF x IRA x EF x EDA
BWA x AT x 365 days/year

 
Intake =

0.652 x 0.227 x 52 x 24
70 x 70 x 365

 
Intake =

1.0 x 10-4 mg/kg-day

For a CSF of 4.95 (mg/kg-day)-1, CR = 1.0 x 10-4 x 4.95 = 4.95 x 10-4

This is 50 times the acceptable risk of 1 x 10-5. Since the risk value was calculated based on aningestion rate of 52 meals/year, eating one fish meal exposes an adult to the total acceptable risk for theentire year under Maine Department of Environmental Protection guidelines. The risk for children islower because the smaller fish meal portion taken and the shorter exposure duration more thancompensate for lower body weight.

The RMCRs (recommended maximum consumption rates) in meals per year are shown in the table onthe following page for fish from the Little Madawaska River and certain other surface water bodies on ornear the Loring installation. R in the equation represents the acceptable risk of 1 x 10-5.


Recommended Maximum Consumption Rates (RMCRs) for Trout-Filet Meals from
Individuals Taken from Selected Surface Waters in the Greenlaw Brook Drainage System and under the Fish Advisory
Surface-water Body Risk Driver Average Concentration
of Risk Driver (mg/kg)
Cancer-slope Factor
(kg-day/mg)
RMCR *
(fish meals/year)
Malabeam Lake PAHs
DDTs
0.016
0.179
7.3
0.34
18.5
Chapman Pit PCBs 0.179 4.95 3.69
Green Pond PCBs 1.23 4.95 0.54
Greenlaw Brook PCBs 1.29 4.95 0.51
Little Madawaska River PCBs 0.65 4.95 1.02

* Recommended Maximum Consumption Rates (RMCR)



Ingestion Rate Calculations for the Little Madawaska River:
RMCR =

R x BWA x 365 x AT
CSF x CFF x IRA x EDA

 


RMCR =

0.00001 x 70 x 365 x 70
4.95 x 0.65 x 0.228 x 24

 


RMCR =

1.0 meal/year

Recommended Maximum Consumption Rates (RMCRs) for Trout Filet Meals from Individuals Taken from Selected Surface Waters in the Butterfield Brook Drainage System and not under the Fish Advisory
Surface-water Body Risk Driver Average Concentration
of Risk Driver (mg/kg)
Cancer-slope Factor
(kg-day/mg)
RMCR*
(fish meals/year)
Butterfield Brook DDTs 0.91 0.34 10.6
East Loring Lake DDTs 0.45 0.34 21.6



APPENDIX D

Addendum to the Health Consultation

The following appendix was not available in electronic format for conversion to HTML at the time of preparation of this document. To obtain a hard copy of the document, please contact:

Agency for Toxic Substances and Disease Registry
Division of Health Assessment and Consultation
Attn: Chief, Program Evaluation, Records, and Information Services Branch, E-56
1600 Clifton Road NE, Atlanta, Georgia 30333



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