F -- DRILLING OF A TEST HOLE AND INSTALLATION OF MONITORING WELLS NEAR FALLON, NV

Notice Date

November 6, 2000

Contracting Office

Department of the Interior, U.S. Geological Survey, 345 Middlefield Road,Mail Stop 285, Menlo Park, CA 94025-3591

ZIP Code

94025-3591

Solicitation Number

01WRSS0004

Response Due

December 27, 2000

Point of Contact

Rita A. Leach, (650) 329-4162

E-Mail Address

Click here to contact the contracting officer via (rleach@usgs.gov)

Description

The U.S. Geological Survey has a requirement for drilling a test hole and installation of monitoring wells near Fallon, Nevada in Churchill County. The purpose of the test hole and wells is to obtain geologic, water level, and water chemistry data at different depths in and near the Fallon basalt aquifer. The upper portion of the hole will be drilled through approximately 400 feet of basin-fill sediments (gravel, sand, silt and clay) overlying the basalt aquifer. The lower portion of the hole will be drilled through the basalt and possibly into an underlying sedimentary aquifer. Three alternative test hole and well designs describe the thickness of basalt aquifer to be drilled. The holes and permanent steel casing shall be of minimum diameter to meet Nevada State Regulations, and allow test hole drilling and installation of monitoring wells, as described by the Alternatives, constructed of 2-inch diameter, flush-joint threaded Schedule 80 PVC casing and screen at specified depths, and emplacement of gravel pack near screened intervals and bentonite grout between screened intervals using a tremie pipe. Listed diameters are suggested minimum nominal values. Nevada State Regulations require the test hole to be 4 inches greater than the diameter of a single casing, or the combined diameter of multiple casings. Alternatives A through C are described in detail in the solicitation in Section C, Description/Specifications/Work Statement. A single Alternative will be selected for the Project after bids have been received. For each Alternative, the upper portion of the test hole shall be drilled to about 400 feet in depth to the top of the basalt and permanent steel casing installed and cement-grouted above the basalt aquifer. The lower portion of the test hole shall be drilled with dual-wall drill stem and reverse circulation, using air and air percussion bit to allow collection of water samples by air lifting as the test hole is drilled. Alternative A consists of drilling a small diameter (6") test hole to a depth of 1,000 feet below land surface and installation of a single monitoring well in the test hole, Alternative B consists of drilling a large diameter (8") test hole to a depth of 1,000 feet below land surface and installation of 2 monitoring wells in the test hole, and Alternative C consists of drilling a larger diameter (10") test hole to a depth of 1,000 feet and installation of 3 monitoring wells. Water samples and basalt cores shall be obtained at specified depths within the basalt. Drilling is expected to start in March 2001 and shall be completed 90 days after notice to proceed. Bidders are required to bid on all items and shall provide prices based on delivery FOB Destination to the specified drilling location. All interested bidders shall submit a written request for the solicitation package to Rita Leach, Contracting Officer, at fax (650) 329-5480 or e-mail to rleach@usgs.gov. The request shall identify the Drilling Project at Fallon, Nevada.

Record

Loren Data Corp. 20001108/FSOL002.HTM (W-311 SN5060J1)