Table ES-7: OU 1 Feasibility Study

TABLE ES-7

SENSITIVITY ANALYSIS OF NET PRESENT WORTH ALTERNATIVE COSTS

Alternative

Baseline Net Present Worth Alternative Costs

Sensitivity Factor 1
Secondary Action Level
Increased to 1200 pCi/g Cs-137⁽¹⁾

1

No Action with Monitoring
$917,400 N/A

2

Engineered Cell
$9,236,000 N/A

3

Moderate Excavation, Off-site Disposal, and RCRA Cap
$15,150,000 $13,990,000

4

Large-Scale Excavation and Off-site Disposal
$24,620,000 N/A

5

Moderate Excavation, Soil Washing, Off-site Disposal, and RCRA Cap
$15,900,000 N/A⁽²⁾

6

Moderate Vitrification and RCRA Cap
$20,140,000 $17,380,000

⁽¹⁾ Secondary action level assumed to increase to 1200 pCi/g Cs-137.

⁽²⁾ Soil Washing volume too impractically low to be cost effective if secondary action level is raised to 1200 pCi/g Cs-137.

Alternative	Baseline Net Present Worth Alternative Costs	Sensitivity Factor 1 Secondary Action Level Increased to 1200 pCi/g Cs-137⁽¹⁾
1 No Action with Monitoring	$917,400	N/A
2 Engineered Cell	$9,236,000	N/A
3 Moderate Excavation, Off-site Disposal, and RCRA Cap	$15,150,000	$13,990,000
4 Large-Scale Excavation and Off-site Disposal	$24,620,000	N/A
5 Moderate Excavation, Soil Washing, Off-site Disposal, and RCRA Cap	$15,900,000	N/A⁽²⁾
6 Moderate Vitrification and RCRA Cap	$20,140,000	$17,380,000