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1 L. A wet bore involves drilling a small borehole and pulling the drill string and attached pipe back through the crossing behind a cutting head. Pressurized water would be used to remove drill cuttings. All water and cuttings would be contained in the bore pit or an adjacent area protected from siltation by erosion control methods. A dry bore involves using a jacking machine to drive the pipe through the soil that underlies the crossing. An auger is inserted through and somewhat beyond the pipe to remove or pull back the cuttings. To protect the pipe from the increased loading and abrasion caused by a dry bore, the pipe would be coated with "Powercrete," a durable outer coating, or would be installed in a larger- diameter casing pipe. Depending on the durability of the jacket on the insulated pipe, American Soda may use a casing pipe at these crossings. Crossings of unsurfaced, lightly traveled roads would be completed by the open- ' cut method or other methods required by the landowner. These crossings would generally be completed in 1 day. Provisions will be made to detour or control passage of traffic while construction takes place. ' 3.3.4 Laying Pipe and Backfilling ' The trenching operation will be followed by pipe stringing, bending, lining up, welding, radiographic examination, wrapping, and coating. Pipe bending is required for changes in topography, crossing under pipelines and utilities, and ' horizontal bending to the existing deflection points of the proposed pipeline. In some cases, factory-manufactured bend will be required to maintain the specified separation distances. A bending schedule will be developed during pipeline design. Before the pipe is placed in the trench, selected native fill material will be used to pad the pipe in areas where there are rocks in the trench bottom or in the fill material. The pipe will be lowered into the trench by side-boom tractors. After the pipe is placed in the trench, more of the selected fill materials will be used to protect the pipe and coating material from damage before the trench is backfilled. Fill will then be placed over the pipe. ' 3.3.5 Hydrostatic Testing ' After the pipe is in the trench, it will be hydrostatically tested for leakage. Any leak in the pipe will be repaired. Water for hydrostatic testing will come from Unocal's alluvial water wells or Unocal's water withdrawal facility on the ' Colorado River south of the town of Parachute. Test water will be routed from the Parachute Site up one pipe to the Piceance Site and then down the second pipe back to the Parachute Site. Water quality will be tested before running the ' hydrostatic test and again before the wafter is discharged at the Parachute Site. Pipelire Wmmaaon Summary Ip ' Yankee GWCh Sodium Minerals Pro~ea Amencan Soda, L.L.P.