| PROPOSED BMPs | Form: (07 )
0
1/23/2012 | Site Specific Conditions and Storm Water Management Plan
SITE DESCRIPTION:
Project/Site Name: Federal RG 22 -5 -397 Field Name: Ryan Gulch
Location: Section 5, Township 3 South, Range 97 West
CDPS Permit #:COR- 03A115 CDPS Permit Date: 05/16/06
Site Type: Well Pad
SWMP Administrator: Mike Gardner
Estimated Disturbance: —5.5 Acres
Inspection Type: 14 day upon construction, 30 day upon interim reclamation
SOIL AND VEGETATION DESCRIPTION:
Soil Types: Redcreek- Rent sac complex Soil Erosion Potential: Moderate
Pre Construction Estimated Runoff Coefficient: 0.1 -0.3
Post Construction Estimated Runoff Coefficient: 0.3
Existing Vegetation Description:Pinyon- Juniper woodland with assorted grasses /shrubs
Pre - Disturbance Vegetative Cover: —35%
Seed Mix for Interim Reclamation: BLM White River Field Office Mix #3
Final Stabilization Date: TBD
RECEIVING WATERS
Name of Receiving Waters: Dry Gulch to Black Sulphur Creek
Distance to Receiving Waters: —1/4 mile to Dry Gulch
Non -Storm Water Discharges: None Anticipated
BEST MANAGEMENT PRACTICES
Description of Potential Pollution Sources: Refer to Ryan Gulch Field Wide SWMP
Phased BMP Implementation:
BMPs will be installed prior to, during, and immediately following construction as practicable with consideration given to safety, access, and ground conditions at the time of construction. Due to the nature of the topography at the site, any number of BMP combinations may be utilized at any phase of the project. Constant efforts will be employed to limit the extent of vegetative disturbance at the time of soil exposure during all construction activities and structural BMP implementation.
For BMP descriptions and installation details, refer to the Ryan Gulch Field Wide SWMP
Construction Phase:
A perimeter eathem berm will be constructed around the edge of the pad during well pad construction to prevent the potential offsite transport of pollutant laden storm water. A perimeter sediment ditch will be constructed along the outside edge of the fill slope to prevent offsite transport of any potential pollutants carved via storm water runoff. At the down - gradient edge of the perimeter ditch, a sediment retention basin will be constructed to collect sediment the may be transported via the perimeter sediment ditch. The sediment retention basin will lined with marify fabric and armored with rock to allow the
sediment to be filtered and contained in the basin, while allowing clean storm water to continue migration off -site.
Perimeter controls (i.e. straw wattles /straw bales) will be established around the topsoil stockpile to prevent any potential erosion or sediment transport. Additional structural BMPs will be installed as necessary to ensure site stabilization and to protect surface water quality.
Interim Reclamation Phase:
After the well pad has been constructed, drilling and completions are completed, with production facilities in operation, the site will be graded to reduce cut and fill slopes to minimize the overall size of the well pad. The well pad will be re- seeded upon completed grading activities. Permanent structural BMPs will be installed and maintained as necessary to assist in site stabilization during interim reclamation.
Final Stabilization Phase:
After all wells have been plugged and abandoned, and production facilities are removed, the well pad will be graded to restore pre - disturbance contours. The well pad will be re- seeded upon completed grading activities. Storm water inspections will continue until the site has reached a stabilization level of 70% of pre - disturbance conditions. Once the site reached final stabilization, a post construction storm water management program will be implemented per COGCC Final Amended Rules (December 17, 2008), Rule 1002 (f) (3).
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| PROPOSED BMPs | Form: (07 )
0
1/23/2012 | Proposed BMPs
Williams Production RMT
RG 22 -5 -397 Pad
Attachment to Form 2A
2A Exhibit 10
• Maximize the use of directional drilling to minimize habitat loss /fragmentation
• Phase and concentrate development activities, so that large areas of undisturbed habitat for wildlife remain.
• Maintain undeveloped areas within development boundaries sufficient to allow wildlife to persist within development boundaries during all phases of construction, drilling, and
production.
• Minimize rig mobilization and demobilization where practicable by completing or recompleting all wells from a given well pad before moving rigs to a new location.
• To the extent practicable, share and consolidate new corridors for pipeline rights - of -way and roads to minimize surface disturbance.
• Engineer new pipelines to reduce field fitting and reduce excessive right -of -way widths and reclamation.
• Treat waste water pits and any associated pit containing water that provides a medium for breeding mosquitoes with Bti (Bacillus thuringiensis v. israelensis) or take other effective action to control mosquito larvae that may spread West Nile Virus to wildlife, especially grouse.
• Use wildlife appropriate seed mixes wherever allowed by surface owners and regulatory agencies.
• Mow or brushhog vegetation where appropriate, leaving root structure intact, instead of scraping the surface, where allowed by the surface owner.
• Post speed limits and caution signs to the extent allowed by surface owners, Federal and state regulations, local government, and land use policies, as appropriate.
• Use wildlife- appropriate fencing where acceptable to the surface owner.
• Use remote monitoring of well production to the extent practicable.
• Install and utilize bear -proof dumpsters and trash receptacles for food - related trash at all facilities that generate such trash.
• Plan new transportation networks and new oil and gas facilities to minimize surface disturbance and the number and length of oil and gas roads and utilize common roads, rights of way, and access points to the extent practicable
• Establish new staging, refueling, and chemical storage areas outside of riparian zones and floodplains.
• Use minimum practical construction widths for new rights -of -way where pipelines cross riparian areas, streams, and critical habitats.
• Construct fluid pit fences and nets that are capable of withstanding animal pressure and environmental conditions and that are appropriately sized for the wildlife encountered.
• Install impermeable barriers beneath fluid pits to protect groundwater, riparian areas and wetlands.
• Skim and eliminate oil from produced water ponds and fluid pits at a rate sufficient to prevent oiling of birds or other wildlife that could gain access to the pit.
• Apply an aggressive, integrated, noxious and invasive weed management plan. Utilize an adaptive management strategy that permits effective responses to monitored findings and reflects local site and geologic conditions
• Strip and segregate topsoil prior to construction. Appropriately configure topsoil piles and immediately seed to control erosion, prevent weed establishment and maintain soil
microbial activity
• Reclaim reserve pits as quickly as practical after drilling and ensure that pit contents do not contaminate soil.
• Perform interim reclamation on all disturbed areas not needed for active support of production operations
• Control weeds in areas surrounding reclamation areas in order to reduce weed competition
• Educate employees and contractors about weed issues
• Maintain pre and post development site inspection records and monitor operations for compliance
• Utilize GIS technologies to assess the extent of disturbance and document the reclamation progression and the footprint of disturbances
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