| Planning | Form: (02A )
402121126
12/22/2022 | Lighting on well pad locations is considered temporary and will be used during drilling, completion and construction activities. Temporary lighting will be directed downward, inward, and shielded towards location to avoid glare on public roads and building units within 1,500 feet. Lighting will be turned off when practical, i.e., no operations being conducted. |
| Planning | Form: (02A )
402121126
12/22/2022 | Noble shall identify the location of the wellbore with a permanent monument as specified in Rule 603.n. The operator shall also inscribe or imbed the well number and date of plugging upon the permanent monument. |
| Planning | Form: (02A )
402121126
12/22/2022 | Per Rule 603.e, Noble shall provide for the development of multiple reservoirs by drilling on existing pads or by multiple completions or commingling in existing wellbores. Nobles Wells Ranch CDP development is confined to a specific disturbance corridor, per landowner requirements. Noble does not plan to drill any development areas from an existing disturbance. |
| Planning | Form: (02A )
402121126
12/22/2022 | Noble shall consolidate wells to create multi-well pads. Multi-well production facilities shall be located as far as possible from Building Units.
• The pad shall be constructed in such a manner that noise mitigation may be installed and removed without disturbing the site or landscaping.
• Pads shall have all weather access roads to allow for operator and emergency response.
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| Community Outreach and Notification | Form: (02A )
402121126
12/22/2022 | The SUA Noble has executed with each of these surface owners authorizes Noble to receive this notification on behalf of the surface owner. Noble will ensure that the surface owner(s) promptly receive notice of the Director's Recommendation. |
| Traffic control | Form: (02A )
402121126
12/22/2022 | Speed limits will be enforced. The traffic plan and route will include mitigation of impacts from temporary operations by applying water or magnesium chloride as dust suppression within 1000’ of occupied residences on Weld County Road 49 and on lease roads as necessary in cooperation with the county. |
| General Housekeeping | Form: (02A )
402121126
12/22/2022 | Housekeeping will consist of neat and orderly storage of materials and fluids. Wastes will be temporarily stored in sealed containers and regularly collected and disposed of at offsite, suitable facilities. If spills occur prompt cleanup is required to minimize any commingling of waste materials with stormwater runoff. Routine maintenance will be limited to fueling and lubrication of equipment. Drip pans will be used during routine fueling and maintenance to contain spills or leaks. Any waste product from maintenance will be containerized and transported offsite for disposal or recycling. There will be no major equipment overhauls conducted onsite. Equipment will be transported offsite for major overhauls. Cleanup of trash and discarded materials will be conducted at the end of each work day. Cleanup will consist of patrolling the roadway, access areas, and other work areas to pick up trash, scrap debris, other discarded materials, and any contaminated soil. These materials will be disposed of properly. |
| General Housekeeping | Form: (02A )
402121126
12/22/2022 | Within ninety (90) days after a well is plugged and abandoned, the well site shall be cleared of all non-essential equipment, trash, and debris. |
| General Housekeeping | Form: (02A )
402121126
12/22/2022 | During drilling, production, and reclamation operations, all disturbed areas shall be kept as free of all undesirable plant species designated to be noxious weeds as practicable. Noble Energy or contractor will conduct daily visual inspections for weeds. |
| General Housekeeping | Form: (02A )
402121126
12/22/2022 | All stockpiled soils shall be protected from degradation due to contamination, compaction and, to the extent practicable, from wind and water erosion during drilling and production operations. Seed mix, a fiber matrix, straw, as examples of control measures that could be used on Topsoil piles for protection. Topsoil stockpiles will be located on the proposed Oil and Gas Location. The maximum height of topsoil stockpiles will be 12 feet. |
| Wildlife | Form: (02A )
402121126
12/22/2022 | Noble initiates multiple levels of Environmental Site Screening efforts for the protection of sensitive wildlife, vegetation, groundwater and surface water resources at every Wells Ranch CDP project area. Prior to construction, a comprehensive desktop survey and field-based wildlife clearance survey will be performed to determine the presence of seasonally protected raptor and migratory bird species.
• In-season, raptor nesting clearance surveys will be performed by a certified biologist no more than one-week prior to construction.
• In-season, migratory bird nesting (MBTA Compliance) will be cleared within 50-feet of the proposed disturbance 2-3 days prior to ground clearing activities.
• Although Bald and Golden Eagle are included in the raptor nesting survey-suite, eagle habitat is not delineated within the Wells Ranch CDP.
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| Storm Water/Erosion Control | Form: (02A )
402121126
12/22/2022 | BMP’s will be constructed around the perimeter of the site prior to, or at the beginning of construction. Specific BMP’s used will include stockpile stabilization, grading, sediment traps, and perimeter barriers based on final construction design and will remain in place until the pad reaches final reclamation. Prior to interim reclamation of the location, the topsoil stockpiles will be utilized as raised earthen berms along the eastern, northern and southern edges of the pad. |
| Storm Water/Erosion Control | Form: (02A )
402121126
12/22/2022 | . Structural Control measure practices specific to the A07-04 Pad located within the Wells Ranch proper area will include the following:
• Compost filter socks (Filtrexx or similar) sediment control logs (CFS);
• Culvert (C);
• Hydro-mulch (HM);
• Rock socks (RS);
• Seeding (S);
• Soil roughening (SR); and
• Vehicle tracking control (VTC).
Inspections during construction include:
At least one inspection every 7 calendar days; OR
2. At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours following precipitation which causes surface erosion.
Once the Pad enters the Completed Stage, it will be inspected a minimum of once every 30 days. Post-precipitation inspections are not
required once the Pad is in the Completed Stage. However, more frequent inspections may be directed by Noble to confirm adequate maintenance or repairs. |
| Storm Water/Erosion Control | Form: (02A )
402121126
12/22/2022 | • A sediment trap will be constructed to capture any sediment prior to leaving the location. The sediment trap has been sized in accordance with good engineering practices. A temporary diversion, consisting of a cut swale and compacted earthen berm, will be constructed along the pad edge and routed to the sediment trap to prevent offsite migration of sediment/contaminant into the nearby surface water features. If necessary, check dams will be constructed within the swale. |
| Storm Water/Erosion Control | Form: (02A )
402121126
12/22/2022 | All stockpiled soils shall be protected from degradation due to contamination, compaction and, to the extent practicable, from wind and water erosion during drilling and production operations. Seed mix, a fiber matrix, straw, as examples of control measures that could be used on Topsoil piles for protection. Topsoil stockpiles will be located on the proposed Oil and Gas Location. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Any material not in use that might constitute a fire hazard shall be removed a minimum of twenty-five (25) feet from the wellhead, tanks and separator. Any electrical equipment installations inside the bermed area shall comply with API RP 500 classifications and comply with the current national electrical code as adopted by the State of Colorado.
• Flammable liquids shall not be stored within fifty (50) feet of the wellbore, except for the fuel in the tanks of operating equipment or supply for injection pumps. Where terrain and location configuration do not permit maintaining this distance, additional equivalent safety measures will be taken.
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| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Per natural gas produced from the well pad; Noble Energy intends to connect to a gas sales line at the first indication of salable quality gas. The sales line is in-place and during any emergency where the sales line is not operational, Noble would shut-in production. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Noble Energy Inc. designs well heads and supporting infrastructure on the well pad to avoid releases and to be compliant with all regulations specific to leak detection and control (i.e. SPCC 40CFR112). Daily, monthly and annual inspections are performed at each well pad to confirm operational integrity and regulatory compliance. Noble will perform maintenance if it is deemed necessary through any of the scheduled inspections. Automation technology is utilized to monitor any variations in pressures and fluid gauges which could indicate a leak at the well head or flow lines to the production facility. In addition, automation provides remote shut-in capabilities in the event of an emergency. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Noble will monitor production facilities on a regular schedule to identify fluid leaks, including, but not limited to, visually inspecting all wellheads, tanks, and fittings. Annual SPCC inspections will be conducted and documented. Flowline integrity will be maintained through implementation of Rule 1104 management practices. Full site FLIR camera will be used at initial start-up and during regularly scheduled leak testing. Noble will perform maintenance if it is deemed necessary through any of the scheduled inspections. Automation technology is utilized to monitor any variations in pressures and fluid gauges which could indicate a leak at the well head or flow lines to the production facility. In addition, automation provides remote shut-in capabilities in the event of an emergency. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Due to using a closed loop system, pits will not be used. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | There will be no tanks or separators at the A07-04 Pad. Facilities will be located on A07-08 Facility.
• A closed–loop system will be used for drilling operations as required by Rule 408.a.
• Operator will use SCADA during drilling and completions to continuously monitor line pressures, flow rates,
temperature, and whether valves are open or closed. Any fluctuations will be closely monitored and will
trigger immediate action including shutting in and scheduling repair or replacement as necessary |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Inspection
• All facilities onsite shall be subjected to an instrument-based leak detection and repair (LDAR) inspection at
least monthly during drilling and completion and quarterly during production.
Infrared surveys will be used to identify any leaks coming from the flowlines on a regular basis
Testing
• Volumetric Testing Involves measurement of liquid volume which must be added or removed from system
to maintain constant pressure; volume changes indicate either leaks or thermal expansion/contraction of
liquid.
New flowlines will be hydrotested to manufactures recommended levels before placed into use.
• Pressure testing of the flowlines is conducted on an annual basis.
• Documented Audible, Visual, and Olfactory (AVO) inspections and optical gas imaging surveys are conduced
monthly by a third-party specialist. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | • Daily site visits are made by lease operators (aka pumpers) to the well pad for maintenance issues including
leaks and spill potential. Periodic site inspections will be conducted by 3rd party environmental contractors
to look for any signs of leaks and or potential leaks. Infrared surveys will be used to identify any leaks
coming from the flowlines on a regular basis. New flowlines will be hydrotested to manufacturer’s
recommended levels before placed into use.
• The location will utilize a SCADA (remote monitoring) system to monitor facility pressures and flows during
drilling and completions. Sensors are placed on multiple points throughout the facility and are designed to
measure the system for irregularities that would indicate a leak in the system or change in production of oil,
water, or gas. The SCADA system is designed with alarms that are triggered by irregularities and will activate
automatic shut-in of the well and facility. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | • During drilling and completions operations a temporary impermeable synthetic or geosynthetic liner will be utilized under equipment. This liner will be installed on top of the plated surface and will provide an additional layer of protection against spills. Secondary containment devices, such as duck ponds or equivalent type products, will be used to protect any pipe connections or equipment that carry, mix, or could possibly leak fluids or chemicals. |
| Material Handling and Spill Prevention | Form: (02A )
402121126
12/22/2022 | Pad construction – Noble will construct the location with 4-6” of clay and 3-5” of road-based cuttings. The well pad will be engineered with a raised earthen berm along the appropriate edges of the pad to protect the applicable surface waters from any fluid-upset condition. Structural controls within the remainder of the perimeter will ensure flow off the pad to the perimeter channel and into a detention-pond structure, further protecting downgradient surface water features.
Liners - A minimum 30-mil poly liner will be utilized under the drilling rig, mud tanks, shakers and drill cuttings bins. During completions, most equipment associated with hydraulic fracturing will be underlain by a minimum 30-mil poly liner with drive-over foam berms. Bulk liquids used during D&C activities, including chemical injection skids, acid and chlorine tanks, and fuel tanks will be containerized in appropriate sealed vessels and underlain by an impervious liner and/or secondary containment system capable of containing any spill or leak from that vessel. |