Opportunity: F11 WATER SUPPLY AND DRAIN

AMENDEMENT 0004 is issued to answer questions that were received and extend the close date to May 18, 2017. 1. Trench wall thickness? 6" 2. Trench base thickness? 6" w/ 6" base rock 3. Grate material? Galvanized steel or reinforced fiberglass? Fiberglass 4. Wheel load of grate? (no more than 250 lbs) 250 Lb 5. Rebar spacing for trench drain walls and footings? 12" OC each way 6. Rebar detail to tie walls into slabs? #4 rebar 18" OC or epoxy dowel 7. Water stop details for base/wall intersection? Prefer PVC water stop at all joints 8. Trench Drain width determined by common grate sizes? Yes 9. Is 24" the grating width or the inside clearance width of the trench? Standard sized grating can dictate inside clearance 10. Are we to include epoxy dowels between the existing floor cut and the new trench concrete? Must be tied in with either epoxy dowel or rebar 11. Is the concrete trench to be reinforced, and if so, what is the sizes and spacing of the reinforcement? #4 bar 12" OC each way. 12. Are the construction joints to be sealed with waterstop? Yes, PVC preferred 13. What is the thickness of the bottom of the concrete trench? 6" 14. Is the trench to be set on a rock base, and if so, what thickness of rock? 6" 15. Is it intended that the void created under the existing floor slab from excavating for the new trench be filled with concrete? Yes 16. Do they want an expansion joint between the existing floor slab and the new concrete trench walls? Yes 17. Do they want the floor construction joint where the existing floor meets the new concrete trench walls to be caulked? Yes 18. Is the trench grating to bear on a galvanized steel edge angle? Yes COMBINED SYNOPSIS/SOLICITATION This is a combined synopsis/solicitation to announce the U.S. Department of Interior (DOI) Untied States Geological Survey (USGS) for the acquisition of the INSTALLATION OF WATER SUPPLY PIPING AND DISTRIBUTION MANIFOLD, INSTALLATION OF SANITARY AND RESEARCH WASTE WATER DRAIN LINES AND INSTALLATION OF FLOOR TRENCH in building F11 at the Columbia Environmental Research Center, 4200 New Haven Road, Columbia, MO 65201. this solicitation can be found with its attachments at FedConnect, www.fedconnect.net with Reference Number G17PS00369. This solicitation is issued as a Small Business Set-Aside. The applicable NAICS is 237110, Water and Sewer Line and Related Structures Construction. Size Standard is: $36.5 Millions of Dollars. In accordance with FAR 36.204 Disclosure of the magnitude of construction projects, the estimated price for this requirement is described as $100,000 and $250,000. Your company must have a DUNS number and be registered on-line at the System for Acquisition Management (SAM) www.sam.gov. Site visit is scheduled for Monday May 01, 2017 at 9:00 A.M. CT, Columbia, MO. Any questions regarding this solicitation should be directed to Beth Wilson via email at bwilson@usgs.gov.