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Rifle Gravel Pit#1 June 2023 <br /> temporary work trailer, screening and wash equipment, temporary vault-and-haul septic <br /> trailer, and potable water. <br /> This phase will also include the installation of the secondary containment structures <br /> associated with the Spill Prevention, Control, and Countermeasure requirements for fueling <br /> activities. There will be one (1) skid-mounted steel double wall fuel storage tank with a <br /> capacity of 12,000 gallons and one (1) skid-mounted steel double wall fuel storage tank with <br /> a capacity of 2,000 gallons. These tanks will have diesel fuel. Attachment A, Sheet 13 <br /> depicts the Spill Prevention Control & Containment (SPCC) Detail for these storage tanks. <br /> Figure 9, Exhibit C4 depicts the location of these storage tanks on the Operations Pad <br /> Area. Scott has an SPCC Plan that outlines the fueling and spill prevention practices. The <br /> SPCC plan commits to complying with Rule 3.1.13 in the instance of a spill. <br /> Size of Area Worked <br /> The total size of area that could be involved with this Phase is 19.00 acres. The specific <br /> areas associated with the Operations Pad include: <br /> • Operations Pad area (estimate): <br /> o 1.86 acres <br /> o 2,999 CY (import fill, CDOT Class 6, — 1 foot depth) <br /> Processing area (screen, crush) (estimate): <br /> o 0.2 acres <br /> • Stockpiling area (staging for processing) (estimate): <br /> o 0.54 acres <br /> Equipment <br /> This phase will use conventional earth moving equipment to grade, remove vegetation and <br /> stockpile topsoil, including but not limited to a bulldozer, track-hoe, and a 35-ton haul truck. <br /> 5.2.2.2 Water Diversions and Impoundments <br /> No water diversions or additional low water crossing work will be required as part of Phase <br /> 2. <br /> 5.2.2.3 Water Handling, Dewatering, and Permits <br /> Scott submitted a gravel pit well permit application which was received by the DWR-SEO on <br /> June 14, 2022. Review of the gravel pit well permit application is currently pending approval <br /> of the SWSP. A copy of the gravel pit well permit application is included Attachment G. <br /> Scott will continue to work on acquiring the necessary permits and approvals initiated during <br /> Phase 1 during Phase 2, as needed, and submit them to DRMS. <br /> 5.2.3 Mining Extraction (Phase 3 [P3]) <br /> Phase 3 includes the mining extraction (processing and stockpiling) operations for the 9.90 <br /> acres (of the 19.00 acres of Affected Lands). This section describes the mining methods, <br /> earthmoving, and size of the areas anticipated to be mined at the 30%, 60%, and 100% <br /> mining development of the 9.90 acres over three to five years. <br /> 27 <br />