Document Z4bk6VoneKoyK537VOEgjnbeY
DRAFT
Table 1. Potential List of PHSP Pre-Design Studies - Updated 6/6/217
Phase 1 Scope Item
Task Pre-Design Field Studies 1 Bathymetry survey 2 Surface sediment sampling 3 Fish tissue sampling
Purpose
Estimated Costs ($K)
Best
Reasonable
Estimate Worst Case
Current sediment depths
Current levels of contamination (N=300 to 500)
Current risk of eating fish (N=95)
$300 $1,392 $510
$390 $1,800 $765
Expenditures by Year Year 1 Year 2 Year 3
100% 10%
90% 100%
4 Surface water sampling 5 Sediment Coring 6 Fish Acoustic Tracking Study
Fate and Transport model calibration
Subsurface extent of contamination (N=90)
Where fish are located
$982 $1,568 $140
$1,473 $2,350 $608
30% 30%
70% 100%
70%
7 Camera Survey of Anglers
Where people fish in the river
$150
$225
30%
70%
8 Porewater sampling
Upstream for background metals
$60
$100
100%
Technical Analyses / Reporting A Focused Work Plan for AOC scope B Refine SWACs and evaluate MNR trends
$200 $200
$400 $400
100% 40%
60%
C Evaluate background
$300
$450
60%
40%
D Refine active footprint
$300
$450
60%
40%
E Refine foodweb model and risks
$350
$525
100%
F Data interpretation reports
$450
$860
100%
Management and Meetings (8%, 10%) $552
$1,080
0.3
0.4
0.3
Contingency Costs (10%, 10%) Oversight costs for DEQ, EPA, and Tribes (25%, 35%)
$690 $1726
$1,080 $3,770
0.3
0.4
0.3
0.3
0.4
0.3
Estimated TOTAL Costs for Phase 1 Pre-Design Studies
$9,870
$16,734
$3,443K $9,674K $3,526K
Note 1: These timeframes are approximate and begin post-discussion with EPA and after selection of a consultant to do the work (except for fish tracking pilot). Note 2: Fish tracking study is only the pilot study at low-end cost; upper end is whole study. Sediment sampling count at low end is 300 and 500 at upper end.
Sierra Club v. EPA 18cv3472 NDCA
Tiers 8&9
ED 002061 00086394-00001
DRAFT
Note 3: Labor for preparation of ROD amendment is included in the technical analyses scope. * SI/W4C = concentration of contaminants
Sierra Club v. EPA 18cv3472 NDCA
Tiers 8&9
ED 002061 00086394-00002
