U.S. Geological Survey, Procurement and Contracts Section, Building 25, Box 25046, MS 204A, Denver Federal Center, Denver, CO 80225

93 -- HEATER TUBING SOL IFB 5-6042 POC Donnarene M. Lewis, Contracting Officer, (303) 236-5900 x321 Purchase of 2000 feet (610m) of Heater Tubing to be used in the collection of subsurface vapor-phase samples. The tubing shall be supplied in increments of one each 1000 feet (330.5m), one each 500 feet (152.5m), two each 200 feet (61m), and one each 100 feet (30.5)m). Tubing shall be deployed in 6- to 9 inch (152-229mm) dry, uncased boreholes, strapped or clamped to steel tubing. Maximum OD shall be two inches (51mm) or less. The heater tubing shall contain an inner transit tubing fabricated from Teflon PFA, having a minimum ID of 0.25-0.375 inch (6.4-9.5 mm). Transit tubing connections between increments shall be via standard stainless steel tubing connections. Heater tubing construction shall include sufficient insulation and a self-limiting or constant-load heating element to achieve and maintain a temperature of 50+2oC. Heating element design and incorporation shall be such that electric power is supplied to any combination of the requisite increments via a single, surface-established connection. A suitable means of surface- based temperature regulation shall be included. The heater tubing shall be sheathed with a protective material such as extruded polyvinyl chloride or polypropylene. Delivery FOB Mercury, NV, 45 days after date of contract. IFB 5-6042 to be issued on or about May 19, 1995 with bid opening 30 days thereafter. All responsible sources may submit an offer which will be considered by the agency. (0121)

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