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January 3, 2025 <br />HWA Project No. 2021-159-21 <br />Geotechnical Engineering Report 30 HWA GEOSCIENCES INC. <br />Port Gardner Storage Facility <br />Area - Structure <br />Pile Cap <br />Elevation <br />(feet)1 <br />Tip <br />Elevation <br />(feet)1,4 <br />Pile <br />Length <br />(feet) <br />Pile <br />Diameter <br />(inches)5 <br />Required <br />Ultimate Axial <br />Capacity <br />(kips) <br />Static Seismic <br />Area 40 – SWVT-40- <br />01 -1 -25 24 8 902 55 <br />Area 46 – CSMH 46- <br />01, CSMH 46-02, <br />pipe south of LS46 <br />(P-46-19), SWVT- <br />46-06 <br />1 to -6 -25 26 to 19 18 350 300 <br />Area 46 – CSVT-46- <br />04 and CSVT-46-05 8 -25 33 18 200 150 <br />Area 60 – Effluent <br />Pump Station3 12 -76 88 18 450 400 <br />Area 60 – Effluent <br />Pump Station -7 -76 69 18 600 550 <br />Area 60 – Effluent <br />Pump Station North <br />Pipe Tower <br />3 -76 79 18 450 400 <br />Area 60 – CSVT 60- <br />01 -1 -76 75 18 450 400 <br />Area 70 – First Floor <br />OMES Generator 14 -25 39 18 300 250 <br />Notes: <br />1 Pile cap and pile tip elevations are approximate. Final pile tip elevations shall be determined by the <br />contractor. <br />2 8-inch-diameter pile can typically achieve an ultimate pile capacity of 90 kips. A factor of safety of 2.0 <br />should be used for static conditions. <br />3 Contractor pile installation techniques and sequencing is unknown; therefore, HWA conservatively ignored <br />pile capacity contribution between approximate elevations 12 feet and -7 feet. <br />4 Pile tip elevation should be adjusted during construction based on the results of the pile testing program.