Laserfiche WebLink
12 <br />Discharge Permits <br />SFOGI plans to modify an existing minimal discharge permit (MINDI) and seek <br />approval of the Colorado Department of Public Health & Environment prior to <br />actual use. Drill water is re-circulated and the pit is managed such that there are <br />no surface discharges leaving the pit under normal operating conditions. <br />Access Roads <br />The drill pad sites will be accessed via existing roads and then access roads cut <br />to each drill pad with minimal additional surface disturbance currently being <br />planned. One new proposed access road (1233 feet long) will be constructed for <br />access to Pads 135 and 138. A brush hog (or similar equipment) will clear the <br />path to the well sites when appropriate, otherwise a dozer will be used to clear <br />the location and build the drill pad. The new driving surface will be approximately <br />12 feet in width, however a total surface width of approximately 30 feet, will be <br />required for sediment control measures. Culverts will only be installed if deemed <br />necessary. Cut/fill balances have been calculated to avoid a haul-off or haul-in <br />situation. <br />CONTINUED FROM PAGE 4 OF NOI FORM <br />III Project Description <br />6.C. A water well type rig will be used in the drilling operations. The holes on <br />pads 137-4-298 and 138-4-298 are to be completed as hydrology <br />observation/monitoring wells, and the SAW wells (pad 135-4-298) will be used for <br />observation wells. SFOGI will also obtain core information on these wells. A <br />water-based, lightweight drilling mud will be used to core through oil shale strata, a <br />saturated halite-sodium bicarbonate fluid may be used to core through the saline <br />mineral zone. Hydrology holes will typically be drilled using the air-mist rotary <br />drilling method from surface casing shoe to total depth. A spot core may be taken <br />to help define the partially leached interval and Dissolution Surface. The blooie <br />line will be at least 4 inches in diameter and shall extend approximately 40 feet <br />from the well bore. Refer to Table 1 for the quantity, depth and diameter of each <br />drill hole. A typical drill hole is shown on Figures 1, 2 & 3. <br />The casing shall be constructed using a fiberglass reinforced epoxy pipe for the 16 <br />hydrology/core holes, and a steel casing for the 4 "SAW" observation/core holes. <br />Casing joints shall be watertight and shall prevent the leakage of water in or <br />through the joint. O-rings of compatible material shall be used to provide <br />watertight joints. The use of solvents, glues, and/or adhesives will not be allowed <br />for casing joints. The steel surface casing will be cemented to surface. This <br />casing will extend a minimum of 40-60 feet into bedrock of the Uinta Formation.