Laserfiche WebLink
10 <br />CONTINUED FROM PAGE 4 OF NOI FORM <br />III Project Description <br />5. Surface preparation will include leveling a drill pad to accommodate <br />drilling and related equipment. Drilling fluids will be handled with one (1) pit, <br />constructed on each pad. Attachment A includes drill pad location and access <br />maps, layouts, grading plans and cross sections for all 3 drill pads covered under <br />this NOI. Drill pads, will be approximately 0.9 acres in size, and will be <br />constructed by leveling the ground after pushing woody materials to the pad <br />edges. If possible, the removed woody vegetation will be stockpiled for use in <br />reclamation. Approximately 6 inches of soil will be stripped prior to construction <br />and stockpiled for future reclamation. The stockpiles will be covered with erosion <br />control material. Silt fence or other erosion control materials will be situated <br />down gradient from the drill pad as specified in SFOGI's Storm Water <br />Management Plan. Vicinity and proposed access maps show the general <br />location of the 3 drill pads and proposed access roads. <br />Hydrology Holes (Pads 137-4-298 & 138-4-298) <br />Containment pits will be constructed on each pad adjacent to the set of <br />hydrology holes. These pits will not be lined and will capture drill cuttings, plus <br />drilling water and formation water that will be developed from the hydrology holes <br />drilled on each pad. Water added to these pits is expected to eventually pass <br />into groundwater of the Uinta formation along with rain and snowmelt that fall <br />directly on the pit. <br />Each pit will be approximately 14' depth. These pits will be fenced with 3-strand <br />barbed wire and steel posts during the initial phase of use. This proposed pit <br />design is identical to that used elsewhere in the area by SFOGI for hydrology and <br />cored wells. <br />Based on extensive hydrological testing in the local area, it is known that ground <br />water in the Uinta, L7, L6, and L5 units typically has lower TDS concentrations <br />than water from the L4 and L3 units. SFOGI intends to place only water from the <br />Uinta, L7, L6, L5 and L4 into the pits if the field measured TDS is below 5,000 <br />ppm. Any water that exceeds TDS concentrations of 5000 ppm measured by <br />field means will be trucked off site to an appropriate disposal facility. <br />It is possible that SFOGI may elect to take a spot core from the L4 hydrology <br />holes and plans to capture and contain drilling fluids associated with this activity <br />in surface containers and dispose of the material using proper methods. <br />After drilling and after hydrology testing, where such testing is employed, each pit <br />will be backfilled with the original material from the pit (other than topsoil) to <br />within about 2 feet of the ground surface and sloped in order to form a shallow