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PRELIMINARY PUBLIC HEALTH ASSESSMENT

NORTH SANITARY LANDFILL - DAYTON
DAYTON, MONTGOMERY COUNTY, OHIO



APPENDICES

APPENDIX A

Figure 1
Figure 1.

Figure 2
Figure 2.

Figure 3
Figure 3.

Figure 4
Figure 4.

APPENDIX B

Comparison value for noncarcinogens

Calculations for Chemicals that do not cause cancer:

Comparison Value = (U.S. EPA RfD x Body Weight) ÷ Ingestion Rate

Exposure Dose = (Medium Concentration x intake rate x exposure factor) ÷ Body Weight

Medium Concentration = the concentration of the chemical in water or soil.

Intake Rate = The amount of water or soil a person would drink or eat.

Exposure Factor = Ratio describing exposure other than daily. No exposure factor is used if the exposure occurs daily.

Body Weight = The amount a person weights. Generally 70 kilograms is used for an adult and 10-15 kilograms for a child.


Calculation of risk for those chemicals that may cause cancer:

Comparison Value = (Risk x Body Weight) ÷ (Slope Factor x Ingestion Rate)

Lifetime Excess Cancer Risk =

Annual exposure dose x slope factor x exposure factor in years

Dose is in mg/kg/day

Slope factor = The U.S.EPA cancer slope factor, (mg/kg/day)-1

Exposure factor = A ratio of the amount of time in years that a person would be exposed to the specific chemical to a standard 70 year lifetime.


Table of Contents

  
 
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Agency for Toxic Substances and Disease Registry, 4770 Buford Hwy NE, Atlanta, GA 30341
Contact CDC: 800-232-4636 / TTY: 888-232-6348

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