| Storm Water/Erosion Control | Form: (02A )
401716922
10/2/2018 | Location lies within proximity to surface water. Operator shall use tertiary containment
along the cross- and down-gradient perimeters of the Location. |
| Emissions mitigation | Form: (02A )
401716922
10/2/2018 | Green Completions -Test separators and associated flow lines, sand traps and emission control systems shall be installed on-site to accommodate green completions techniques. When commercial quantities of salable quality gas are achieved at each well, the gas shall be immediately directed to a sales line or shut in and conserved. If a sales line is unavailable or other conditions prevent placing the gas into a sales line, the operator shall not produce the wells without an approved variance per Rule 805.b.(3)C. |
| Planning | Form: (04 )
402500883
11/11/2020 | Light sources during all phases of operations will be directed downward or shielded so no light pollution leaves the facility. |
| Storm Water/Erosion Control | Form: (04 )
402500883
11/11/2020 | Operator will utilize BMPs at the location to control stormwater runoff in a manner that minimizes erosion, transport of sediment offsite, site degradation, and protects surface waters. BMPs to be implemented include, but are not limited to: a diversion ditch the well pad and around the topsoil and spoils storage, sediment basins, sediment control logs and rock socks/wattles. Depending on the status of reclamation, the site will be inspected on either a 14-ay, 30-day, annual, or rain triggering event. In addition, the City of Aurora requires a Stormwater Management Plan through the local permitting process. The City approved Operator’s Stormwater Management Plan on May 18, 2018. |
| Material Handling and Spill Prevention | Form: (04 )
402500883
11/11/2020 | Protection of Shallow Groundwater: Operator places RPE Linger with 10oz Geomembrane under all mud tanks, as well as the surface and production rig to catch any releases that may occur. In addition, Operator lines their well cellars with a liner material. Conex containment is also used to house items.
Well effluent containing more than 10 (ten) barrels pe day of condensate or within two (2) hours after first encountering hydrocarbon gas or salable quality will be direct to a combination of sand traps, separators, surge vessels, and tanks as needed to ensure safe separation of sand, hydrocarbon liquids, water and gas and to ensure salable products are efficiently recovered for sale or conserved and that non-salable products are disposed of in a safe and environmentally responsible manner.
Operator utilizes 27” tall corrugated galvanized metal berm walls with a capacity in excess of 150% of the largest tank contained within the wall. In addition, Operator’s best practices mandates the use of impervious liners that extends under each storage tank and up the walls, permanently affixed to the top of the metal berm wall. Protrusions of piping that come through the liner include a fully sealed “boot” to prevent leakage. Separators will be contained within 22” tall metal berms built on compacted, Class 6 fractured granite road base with 95% compaction.
The tank battery will be built with remote shut-in capabilities via automation such that if tank levels approach their max tank level set point, if a vapor recovery tower approaches its max fluid level set point, or if a separator approaches its max pressure set point, alarms will be sent to field personnel. If any of those max set points are reached, the well in question will be automatically shut-in.
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| Dust control | Form: (04 )
402500883
11/11/2020 | Operator places road base, rock and recycled asphalt to assist with dust abatement. During construction, drilling, completions and reclamation phases. Crestone monitors each site and, if needed, will run water trucks on the lease road and county road. |
| Noise mitigation | Form: (04 )
402500883
11/11/2020 | Noise mitigation- Operator will perform a baseline noise survey prior to any operational activity measuring dBA at a distance 350 feet from the noise source or sound levels will be measured at a point twenty-five (25) feet from the structure towards the noise source. In situations where measurement of noise levels at three hundred and fifty (350) feet is impractical or unrepresentative due to topography, the measurement may be taken at a lesser distance and extrapolated to a 350-foot equivalent using the formula stated in Rule 802 of the State of Colorado Oil and Gas Conservation Commission. Crestone will install temporary 32 foot sound walls and will install permanent noise mitigation at the location if determined it is necessary based on results from the baseline noise survey. |
| Odor mitigation | Form: (04 )
402500883
11/11/2020 | Drilling rig and completion engine exhausts are pointed straight up so as not to be directed towards any occupied buildings. During the fracturing process, diesel-fueled fracturing equipment will be away from the Building Unit. To mitigate the effects of odor from Operator’s operations, Operator will employ only International Association of Oil and Gas Producers (IOGP) Group III drilling base fluids with <0.5 weight % aromatics and will not use drilling fluids based on diesel. We also employ the use of mud chillers. Sealed tanks with pressure relief valves and emissions controls will be utilized for the production facilities. |