| Site Specific | Form: (02A )
400190282
9/8/2011 | A Sensitive Area Determination has not yet been performed for this location, however, prior to the submittal of a form 15 for the flare pit (special purpose pit) shown on the plats, a Sensitive Area Determination will be performed. Regardless of the result of the Sensitive Area Determination, Williams will employ the following BMPs to support protection of surface and ground water:
• Williams will ensure secondary containment for any volume of fluids contained at well site during drilling and completion operations; including, but not limited to, construction of a berm or diversion dike, diversion/collection trenches within and/or outside of berms/dikes, site grading, or other comparable measures (i.e., best management practices (BMPs) associated with stormwater management) sufficiently protective of nearby surface water. Any berm constructed at the well pad location will be stabilized, inspected at regular intervals (at least every 14 days), and maintained in good condition.
• Williams will implement best management practices to contain any unintentional release of fluids, including any fluids conveyed via temporary surface or buried pipelines.
• Reserve pit, or any other pit used to contain/hold fluids, if constructed, must be lined or a closed loop system (which operator has indicated on the Form 2A Permit) must be implemented during drilling.
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| Drilling/Completion Operations | Form: (02A )
400190282
9/8/2011 | DRILLING/COMPLETIONS BMP's
• Use centralized hydraulic fracturing operations.
• Install and maintain adequate measures to exclude all types of wildlife (e.g., big game, birds, and small rodents)
from all fluid pits (e.g., fencing, netting, and other appropriate exclusion measures).
• Conduct well completions with drilling operations to limit the number of rig moves and traffic.
• Flowback and stimulation fluids will be sent to tanks, separators, or other containment/filtering equipment before the fluids can be placed into any pipeline or pit located on the well pad. The flowback and stimulation fluid tanks, separators, or other containment/filtering equipment must be placed on the well pad in an area with additional downgradient perimeter berming. The area where flowback fluids will be stored/reused must be constructed to be sufficiently impervious to contain any spilled or released material.
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| Planning | Form: (02A )
400190282
9/8/2011 | PLANNING BMP's
• Share/consolidate corridors for pipeline ROWs to the maximum extent possible.
• Maximize the utility of surface facilities by developing multiple wells from a single pad (directional drilling), and by
co-locating multipurpose facilities (for example, well pads and compressors) to avoid unnecessary habitat fragmentation
and disturbance of additional geographic areas.
• Minimize newly planned activities and operations within 300 feet of the ordinary high water mark of any reservoir,
lake, wetland, or natural perennial or seasonally flowing stream or river.
• Avoid new surface disturbance and placing new facilities in key wildlife habitats in consultation with CDOW.
• Minimize the number, length, and footprint of oil and gas development roads
• Use existing roads where possible
• Combine and share roads to minimize habitat fragmentation
• Place roads to avoid obstructions to migratory routes for wildlife, and to avoid displacement of wildlife from public to
private lands.
• Maximize the use of directional drilling to minimize habitat loss/fragmentation
• Maximize use of remote completion/frac operations to minimize traffic
• Maximize use of remote telemetry for well monitoring to minimize traffic
• Restrict oil and gas activities as practical during critical seasonal periods
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| Final Reclamation | Form: (02A )
400190282
9/8/2011 | PRODUCTION/RECLAMATION
• Remove well pad and road surface materials that are incompatible with post-production land use and re-vegetation
requirements
• Use only certified weed-free native seed in seed mixes, except for non-native plants that benefit wildlife
• Williams will use certified, weed free grass hay, straw, hay or other mulch materials used for the reseeding and
reclamation of disturbed areas.
• Install exclusionary devices to prevent bird and other wildlife access to equipment stacks, vents and openings.
• Reduce visits to well-sites through remote monitoring (i.e. SCADA) and the use of multi-function contractors.
• Avoid dust suppression activities within 300 feet of the ordinary high water mark of any reservoir, lake, wetland, or
natural perennial or seasonally flowing stream or river where possible.
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