TABLE ES-5

COMPARISON OF RISKS FOR REMEDIAL ALTERNATIVES


Type of Risk
Type of Control Measure		 Alternatives
1 2 3 4 5 6
Residual Radiological Risk to Future Receptor after 100 years of Institutional Control1

Former HWMF Industrial Worker3

 

Residual Risk if drinking water pathway turned on4

Zoning Restrictions Prevent Residential Use
Cap Maintenance

(Assumes Well Restrictions Fail)

6.3E-02

 

6.3E-02

1.5E-05

 

4.3E-05

1.4E-05

 

1.5E-05

2.0E-05

 

2.1E-05

1.4E-05

 

1.5E-05

1.4E-05

 

1.6E-05

Residual Radiological Risk to Future Receptor after 50 years of Institutional Control2

Former HWMF Industrial Worker3

 

Residual risk if drinking water pathway turned on4

  

2.0E-02

 

2.0E-02

4.8E-05

 

1.5E-04

4.5E-05

 

5.1E-05

6.5E-05

 

7.1E-05

4.5E-05

 

5.1E-05

4.5E-05

 

5.2E-05

Implementation Risk

Remediation Worker

Collective radiation dose
(characterization surveys, excavation/handling/disposal of soils)

 

Non-rad construction risk5
(heavy equipment operation)

 

DOE/BNL Radiation Exposure Controls

 

OSHA regulations
Standard Construction Safety Practices

9 person-rem

 

None

168 person-rem

 

8.4E-04

45 person-rem

 

3.2E-03

90 person-rem

 

5.3E-03

120 person-rem

 

3.2E-03

75 person-rem

 

3.2E-03

Community

Airborne Particulates

 

Transportation for Off-site Disposal
-Radiation Risk

 

-Non-Radiation (accident) Risk

 

Dust Suppression

 

DOT Regulation

 

DOT Regulation

 

Negligible

 

None

 

None

 

Negligible

 

4.4E-10

 

2.1E-11

 

Negligible

 

2.6E-07

 

7.3E-09

 

Negligible

 

5.3E-07

 

8.5E-08

 

Negligible

 

8.8E-08

 

2.4E-09

 

Negligible

 

None

 

None

 

1Residual radiological risk is from potential future cancer risk after a 100-year institutional control period, based on radiological doses.

2Residual radiological risk is from potential future cancer risk after a 50-year institutional control period, based on radiological doses.

3Assumes no drinking water ingestion pathway

4Based on infiltration of Sr-90 to groundwater. No risk from existing Sr-90 groundwater contamination considered.

5Non-radiological construction risk is from construction-related physical risk during time of implementation.