LCLS-II Cryo Install - Tank Farm Foundation

Sources Sought for consideration of capability and capacity to provide construction services to: LCLS-II Cryo Install - Tank Farm Foundation Provide construction services for: GHe Tank and LN2 Dewar (aka LN2 Tank) Foundations per attachments 1, 2, 3 and the notes below. - 1. Services shall be in accordance with attachments 5 and 6 as referenced / required by this document and Attachments 1, 2 and 3. - 2. All steel exposed to the weather shall be galvanized. Grind off galvanize at welds, repair at exposed welds. - 3. As indicated on 79120-0050 (Attachment 3), the 28', 14', 60" and 20" GHe Tank dimensions shall be considered verified. - 4. As indicated on 79120-0050, the 45'-8", 16', 25.125", 20" and 16" LN2 Tank dimensions shall be considered coordinated / verified. The fixed and floating saddle locations shall be considered verified. - 5. Services shall include disposal of excavated compacted fill and rock. - 6. Services exclude GHe and LN2 Tank Installation and the associated materials, including - a. Shim plates (i.e. the plates between the tank saddle and 1" shear plates) - b. Non-shrink grout beneath the tank saddles - c. Plate washers and double nuts above the tank saddle - d. Welds between the 1" shear plates and the tank saddle (GHe Tanks, LN2 Tank Fixed Saddle) - e. Welds between the 1" shear plates and shims (LN2 Tank Floating Saddle) - f. 2.5" Shear Blocks (LN2 Tank Floating Saddle) - g. Welds between the shear plates and the shear blocks (LN2 Tank Floating Saddle) Tank Farm Pipe Support, LN2 Fill Station and GHe Fill Stations Foundations per attachment 1 and the notes below. - 1. Contractor shall provide twenty three (23) foundations per Detail B2 in Attachment 1. A specific location for each footing will be provided by the Owner prior to the start of work. - 2. The ground shall be excavated / prepared and the foundations constructed / installed in accordance with attachments 5 and 6. - 3. All materials shall be provided by the Contractor. - 4. A Third Party Inspection Agency (contracted by the Owner) shall perform required special inspections. Contractor shall inform agency of installation schedule and make the provisions necessary for inspection. - 5. Services shall include disposal of excavated compacted fill and rock. Tank Farm grounding ring per attachment 4 in accordance with attachments 5 and 6 and the notes below. - 1. Grounding ring shall be #4/0 bare ground cable buried 36" below grade. Services shall include connection of grounding ring to existing grounding conductor buried below the trench. - 2. Connections between grounding / bonding conductors shall be irreversible (crimped or cad welded). - 3. Provide two pig tails, no less than 5', at the centerline of the road trench (one at the trench and one at the north wall of the tank farm). - 4. All other grounding work is excluded. - 5. Grounding conductors, conduits, bus bar and jumpers shall be installed to miss all footings and existing buried conduits. - 6. Services shall include disposal of excavated compacted fill and rock. Aggregate base placement in accordance with attachment 1 and the notes below.