Item No.: 8g_supp Date of Meeting: April 14, 2026 Terminal 5 upland projects authorization for ERL Funding Action Requested • Request Port of Seattle Commission authorization for the Executive Director to authorize spending $6,318,000 of Environmental Remediation Liability (ERL) costs for the disposal of legacy contaminated soil from the Terminal 5 Upland projects authorized under the Terminal 5 Berth Modernization Management Reserve (CIP 800988) and the Terminal 5 Modern 3rd Lease Amendment Capital Improvement Plans (CIP 801340). 2 Project Location 3 Background An estimated 86,000 tons of contaminated soil and slag needs to be removed from the following four previously authorized NWSA projects located in the uplands of Terminal: • T5 North Reefer Infrastructure Project (U00649) o In construction, reaches substantial completion Q2 2026 • T5 New Gate Complex Project (U00673) o In construction, reached substantial complete on April 1, 2026. • T5 Phase II Uplands Paving Project (U00708) o Construction starts Q2 2026, substantial completion expected Q4 2026 • T5 Container Yard Expansion Project (U00712) o Construction starts Q2 2026, substantial completion expected Q3 2026 4 Cost Breakdown Reefer U00649 Gate U00673 Paving U00708 Yard Exp (U00712) Total Design/Softcosts $5,642,275 $3,900,884 $1,504,879 $2,406,206 $13,454,244 Construction * $29,776,855 $10,651,058 $15,809,968 $15,868,913 $72,106,794 Project Total $35,419,130 $14,551,942 $17,314,847 $18,275,119 $85,561,038 Incremental Soil Disposal Costs Details $545,730 NWSA Soil Disposal Cost $213,210 $1,100,240 $709,500 $2,568,680 Port ERL Cost $1,753,145 $619,942 $2,483,032 $1,461,881 $6,318,000 Total Soil Disposal Costs $2,298,875 $833,152 $3,583,272 $2,171,381 $8,886,680 NWSA COSTS *Port ERL Costs are not included in the NWSA Construction Costs 5 Recommendation • Use Port ERL funds to dispose of the soil from NWSA T5 uplands projects. - Recognizes the obligatory event under GASB 49 (AC-9) as an environmental remediation liability. - Adheres to NWSA Charter that the relevant homeport shall be responsible for the incremental cost of disposal for legacy contamination that pre-dates NWSA operations. 6 ERL Authorization Summary Authorization Capital Expense Total Previous authorizations $0 $0 $0 Current request for authorization $0 $6,318,000 $6,318,000 Total authorizations, including this request Remaining amount to be authorized $0 $6,318,000 $6,318,000 $0 $6,318,000 $6,318,000 7 Discussion / Questions? 8