| Drilling/Completion Operations | Form: (02A )
401592536
8/13/2018 | Storm Water Management Plan (SWMP) will be in place to address construction, drilling, and operations associated with oil and gas development through the State of Colorado in accordance with CDPHE General Permit Rules.
Spill prevention control and countermeasure plan is in place to address construction, drilling, and operations asscoiated with oil and gas development throughout the State of Colorado in accordance with CFR 112. |
| Planning | Form: (04 )
402799059
9/14/2021 | Lighting Mitigation:
- During construction, no night work and no permanent lighting will be installed on the Site. Daylight operations only are performed during this phase of operation.
- Crestone’s development of the Fraser (the “Site”) necessitates work activities to be performed 24 hours a day during drilling and completion phases, requiring the use of temporary and transient lighting to conform with nationally recognized industry and federally mandated safety standards.
- A proposed 32-foot-high sound/visual wall (32-foot wall) will be installed on the East side of the site.
- There will be 3-Fixture LED Telescoping Mobile Temporary Lighting Towers and 2-Fixture LED Flood Wall Mounted Lights that may be affixed to the 32-foot wall and lights permanently affixed to equipment. All lighting capable of adjustment will be directed inward, downward and shielded to avoid glare on public roads and to prevent light shining beyond the boundary of the Site, while at the same time providing a safe workplace that is free from recognizable hazards and complies with OSHA, ANSI and IESNA standards.
- Drilling rig lights shall be angled and shielded to avoid direct light shining beyond the boundary of the site.
- The lights will be inward, pointing away from residents and none of the lights are directed outward.
- Concurrent to the commencement of any operational changes (e.g., at the end of drilling operations and at the start of hydraulic stimulation operations), a lighting self-audit of the site will be performed to ensure that there is not any rogue light coming from the site that may become a nuisance.
- Once wells are in the production phase, no night work is anticipated, and no permanent lighting will be installed on the site.
- Will use automation, timers, or motion sensors to control and minimize lighting when not needed.
- Will use full cut-off lighting to better direct light, lighting colors that reduce lighting intensity and low-glare or no-glare lighting when possible.
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| Dust control | Form: (04 )
402799059
9/14/2021 | - Application of fresh water to disturbed areas during earth moving activities.
- Application of fresh water or magnesium chloride to graveled surfaces of the Site and associated roads.
- Use of high-quality construction materials such as crushed granite road base, which generates less dust than other aggregates.
- Limit disturbance of natural vegetation to only that area that is reasonably necessary for construction.
- Re-establishment of vegetation on disturbed areas not graveled.
- Covered storage containers to be used for sand, silica, proppant or similar material during hydraulic fracturing.
- Establish speed limit on all access roads of 20MPH or less. Personnel failing to comply will be subject to disciplinary action.
- Establish speed limit on the Site of 5MPH or less. Personnel failing to comply will be subject to disciplinary action.
- Curtail scope of work during high wind conditions (sustained winds 25MPH or greater).
- Regular road maintenance will include adding gravel and grading when needed per the executed Road Maintenance Agreement between the Operator and City of Aurora.
- Additional management practices such as road surfacing, natural wind breaks and barriers, or automation of wells to reduce truck traffic may also be utilized to minimize fugitive dust emissions.
- Crestone will use a rock base tracking pad at the access point to help remove dirt and prevent debris from collecting on all access roads. As necessary, Crestone will sweep roads nearest the access point of dirt and debris to maintain a clean entrance.
- Vertically track the stockpile by heavy equipment to prevent wind and water erosion.
- During construction, salvaged topsoil will be seeded and monitored for erosion and the establishment of undesirable and noxious weeds routinely.
- Seeding and straw mulch application will occur on the long-term topsoil storage stockpile during interim reclamation.
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| Noise mitigation | Form: (04 )
402799059
9/14/2021 | - A proposed 32-foot-high sound/visual wall (32-foot wall) will be installed on the East side of the site.
- Acoustical panels will be added to equipment during fracing operations in order to remain in compliance with COGCC limits.
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| Odor mitigation | Form: (04 )
402799059
9/14/2021 | - Drilling rig engine exhausts are pointed straight up so as not to be directed towards any occupied buildings.
- To mitigate the effects of odor from Crestone's operations, Crestone will employ only International Association of Oil & Gas Producers (IOGP) Group III drilling base fluids with <0.5 weight % aromatics and will not use drilling fluids based on diesel. These Group III drilling fluids are odorless and contain no BTEX.
- Drilling mud chillers are used to keep drilling fluid temperatures low. (Low drilling fluid temperatures reduce the volume of fluid vaporized into the air.)
- All drilling fluids will be routed through a closed loop system.
- No open earthen pits to store fluids or drill cuttings.
- Drill piping is wiped down each time the drilling operation “trips” out of the hole.
- Drill cuttings are placed in metal bins and covered to minimize odors prior to being transported to the designated waste management facilities.
- During the hydraulic fracturing process, diesel-fueled equipment is placed in a way that exhausts are pointed straight up to not direct exhaust towards any occupied buildings.
- Tier II or Tier IV diesel engines are used during hydraulic fracturing operations where available.
- During operations, tanks are sealed with a thief hatch to prevent emissions.
- Emission Control Devices (Combustors) will be used to combust any flash gas from tanks.
- During oil loadout operations, a Truck Loadout Vapor Recovery (TLVR) system will be used to capture and direct odorous air contaminants and emissions to a combustor.
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