| Planning | Form: (02A )
402118763
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 )
402118763
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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| Planning | Form: (02A )
402118763
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 )
402118763
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. |
| Community Outreach and Notification | Form: (02A )
402118763
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 )
402118763
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 51, and on lease roads as necessary in cooperation with the county. |
| General Housekeeping | Form: (02A )
402118763
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 )
402118763
12/22/2022 | All surface trash, debris, scrap or discarded material connected with the operations of the property shall be removed from the premises or disposed of in a legal manner. |
| General Housekeeping | Form: (02A )
402118763
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. |
| Wildlife | Form: (02A )
402118763
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 )
402118763
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. |
| Storm Water/Erosion Control | Form: (02A )
402118763
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 )
402118763
12/22/2022 | . Structural Control measure practices specific to the A07-01 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. |
| Material Handling and Spill Prevention | Form: (02A )
402118763
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 )
402118763
12/22/2022 | Due to using a closed loop system, pits will not be used. |
| Material Handling and Spill Prevention | Form: (02A )
402118763
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. |
| Material Handling and Spill Prevention | Form: (02A )
402118763
12/22/2022 | Water-based Bentonitic Drilling: Water-based bentonitic drilling fluids returning up the annulus will be filtered to remove solids through the closed loop system, cuttings shaken out into impervious bins above a mat and hauled off for off-site disposal while fluids will be routed through a suction tank and mud pump, remixed and recirculated. Waste Management is contracted to transport this waste stream to one of the permitted commercial waste disposal facilities.
Oil-Based Drilling Fluids: Oil-based drilling fluids returning up the annulus will be filtered to remove solids through the closed loop system, cuttings shaken out into impervious bins above a mat and hauled off for off-site disposal while fluids will be routed through a suction tank and mud pump, remixed and recirculated. All oil and water loadouts that are commonly used have a load bucket and isolation valve. Since they are used often, there is not a bull plug installed. Any loadouts (water on back of tanks for example) that are rarely used, are bull plugged without a load bucket. Waste Management is contracted to transport this waste stream to one of the permitted commercial waste disposal facilities.
Frac sand will be periodically drained via vacuum truck and will be transported by licensed third-party trucks.
There will be no produced water storage at the Location.
Oily waste and tank bottoms will be periodically drained via vacuum truck.
Impacted or Contaminated Soil will be containerized as needed either in storage bins or directly into dump trucks, depending on the volume needed. |
| Material Handling and Spill Prevention | Form: (02A )
402118763
12/22/2022 | • There will be no tanks or separators at the A07-01 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.
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.
• No pits will be used on location, therefore pit level Indicators will not be used on location.
• 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. A 40 ml poly liner with foam type berms will be utilized under the drilling rig, mud tanks, shakers, and drill cuttings bins
• All flowlines are designed/constructed/tested to ASME B31.4 and API 1104 standards. Only materials with Material Test Reports (MTRs) provided by the pipeline supplier are used in the construction of the flowlines.
• Location will be equipped with remote monitoring capability.
The surface of the location will be plated with 3-5 inches of road base aggregate compacted that will deter
releases from easily seeping into the soil. Operator will install an earthen berm and ditch system around the
perimeter of location that would keep a release from moving out onto un-plated soil. |
| Material Handling and Spill Prevention | Form: (02A )
402118763
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 )
402118763
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 |
| Material Handling and Spill Prevention | Form: (02A )
402118763
12/22/2022 | Noble will not situate new staging, refueling, or chemical storage areas within 500 feet of the Ordinary High-Water Mark (OHWM) of any river, perennial or intermittent stream, lake, pond or wetland. |
| Dust control | Form: (02A )
402118763
12/22/2022 | Noble shall employ practices for control of fugitive dust caused by their operations. Such practices shall include but are not limited to the use of speed restrictions, regular road maintenance, restriction of construction activity during high wind days, and silica dust controls when handling sand used in hydraulic fracturing operations. Additional management practices such as road surfacing, wind breaks and barriers, or automation of wells to reduce truck traffic may also be used to minimize fugitive dust emissions. (For locations with BUs within 1500’): Engineered sound walls no less than 16’ tall will be used along the North, East and South sides to mitigate dust impacts to these residences. |
| Dust control | Form: (02A )
402118763
12/22/2022 | When Noble Energy is required to suppress dust,
o Use only fresh water sources (non-potable) when watering areas within 300 feet of the ordinary high-water mark of any water body.
o Maintain a current Safety Data Sheet (SDS) in their company vehicle when using a dust suppressor containing chemicals, in accordance with OSHA Standard 29 CFR 1910.1200 (Hazard Communication) as well as local and State requirements.
o Ensure watering practices are not creating additional hazards on access roads (slick roads, muddy conditions, etc.)
• All soil piles created by construction activities will be managed utilizing Hydro-mulch, straw crimping, and/or tracking methods to prevent dust from exiting location and creating a hazard during pre-production activities. Soil piles will be graded and/or seeded to prevent erosion and the
generation of dust post-production.
• Noble Energy will minimize the amount of fugitive dust using speed restrictions. All vehicles will be subject to a speed limit of 20 MPH on all lease roads to minimize dust.
• Noble Energy will mitigate the creation of fugitive dust through regular road maintenance as coordinated through agreements with Relevant Local Governments or Agencies with road jurisdiction.
• Noble Energy will use methods including wind breaks and barriers, road or facility surfacing, and soil stockpile stabilization measures to suppress fugitive dust caused solely by wind.
• Noble Energy will avoid the creation of fugitive dust by restricting or limiting construction activity during high wind days.
• Noble Energy will not use any of the following fluids for dust suppression: Produced water; E&P waste or hazardous waste; Crude oil or any oil specifically designed for road maintenance; Chemical solvents; Process fluids
• Access road(s) will be watered or treated with one of the following commercial Magnesium Chloride dust suppressants, as needed: Roadsaver; Roadsaver Compaction Aid; DuraBlend
• Prior to the application of dust suppressant to any county or public roads, coordination will be conducted with Weld County Department of Public Works by Noble Energy and any relevant vendors.
• Noble Energy will maintain safety data sheets (“SDS”) for any chemical-based dust suppressant and make the SDS immediately available upon request to the COGCC Director and to the Local Government. Safety Data Sheet(s) for any chemical-based dust suppressant will be archived and
maintained until the site passes final site Reclamation and transfer the records upon transfer of property ownership.
• All secondary roads created for this project (non-public roadways) will be finished with ½” – ¾” crushed stone road base.
Silica dust from handling sand used in hydraulic fracturing operations will be mitigated by utilization of the enclosed Sand Box type sand delivery method. |
| Construction | Form: (02A )
402118763
12/22/2022 | At the time of construction, all leasehold roads shall be constructed to accommodate local emergency vehicle access requirements and shall be maintained in a reasonable condition. Noble Energy plans on building the access road off Weld County Road 51 for Drilling and Completion activities. Local government will not require coordination of a traffic plan with the local jurisdiction for this location. |
| Construction | Form: (02A )
402118763
12/22/2022 | All surficial activities performed by Noble during facility construction and production will be protective of the environment. Bulk liquids used or stored will be containerized in appropriate vessels and underlain by an impervious liner and containment berm capable of containing any spill or leak from that vessel. Valves and temporary flow lines associated with facility site activities will be inspected daily while in service. Any spills identified on location will be immediately contained, recovered, disposed of, remediated and reported per COGCC Series 900 Rules (912 Spills and Releases). |