Notification TO OPERATORS DRILLING WELLS WITHIN 3 .


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NOTICE TO OPERATORS DRILLING WELLS WITHIN 3/4 MILE OF THE RIM OF THE ROAN PLATEAU IN GARFIELD COUNTY. PIT DESIGN, CONSTRUCTION, AND MONITORING REQUIREMENTS. Timing. May 20, 2008 COGCC Field Tour to observe current fluid management practices near the rim of the Roan Plateau
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Slide 1

NOTICE TO OPERATORS DRILLING WELLS WITHIN 3/4 MILE OF THE RIM OF THE ROAN PLATEAU IN GARFIELD COUNTY PIT DESIGN, CONSTRUCTION, AND MONITORING REQUIREMENTS

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Timing May 20, 2008 COGCC Field Tour to watch current liquid administration hones close to the edge of the Roan Plateau May 21, 2008 COGCC met with administrators and other invested individuals in Battlement Mesa to talk about our aims in regards to the NTO May 23, 2008 COGCC issued the main draft of the NTO and requested remarks from invested individuals June 5, 2008 COGCC issued the second draft of the NTO. June 12, 2008 COGCC expects to issue the last NTO

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Area of Concern

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JUSTIFICATION FOR CONTINUED USE OF PITS Current foundation advancement in the Area of Concern is restricted, which brings about strategic issues with execution of shut circle or semi-shut circle (CL/SCL) frameworks CL/SCL frameworks may bring about more prominent land unsettling influence connected with cushion development (extra space for tanks) and pipeline development (extra water pipelines for a steady water supply) CL/SCL frameworks may bring about the potential for spills connected with expanded truck and overwhelming gear activity for taking care of penetrate cuttings and liquids, mechanical disappointments, and solidifying of over the ground funneling

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JUSTIFICATION FOR CONTINUED USE OF PITS CL/SCL frameworks may bring about other calculated issues identified with watched water streams and regulation necessities for crisis control of liquids. Regardless of these issues, COGCC means to work with administrators to keep assessing CL/SCL frameworks.

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Pit Use Pit prerequisites apply to fleeting multi-reason pits, which might be utilized as a flare pit, a blooey pit, a surface interim/well control pit, a bond returns pit, a hold pit, or potentially a flowback pit. Generation pits must agree to the prerequisites exhibited beneath and must be allowed on a Form 15 (Earthen Pit Report/Permt). Extra checking and additionally more stringent development practices may apply. Penetrate cuttings pits or bermed cuttings heaps should not be lined. No free fluids surpassing de minimis sums will be allowed in penetrate cuttings pits in the Area of Concern.

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General Requirements Pits should not be built on known discontinuous or perpetual springs, leaks, or other surface water highlights. On the off chance that groundwater is experienced amid pit development a substitute area should be proposed or a CL/SCL might be considered.

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General Requirements at least two (2) feet of freeboard should be kept up at all times, and administrators might keep up liquids in pits at the most minimal practicable level, subject to the kind of operation in process. Any collection of oil in a pit should be evacuated inside twenty-four (24) hours of revelation, unless the pit is an appropriately allowed, fenced, lined, and netted generation (skim) pit.

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General Requirements Where important to ensure general wellbeing, security and welfare or to keep antagonistic natural effects coming about because of access to a pit by untamed life, transitory winged creatures, residential creatures, or individuals from the overall population. Administrators might introduce suitable mesh or fencing and develop escape slopes. No parcel of any pit should be developed on fill material, unless the pit and fill incline are outlined and ensured by a Professional Engineer, subject to audit and endorsement by the Director before development of the pit.

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Pit Design and Construction Pits should be built with a twofold liner framework. Administrators will have the alternative of utilizing a compacted earth liner overlain by an engineered liner or a twofold manufactured liner underlain by compacted soil or reused penetrate cuttings to ensure the manufactured liners. Pit sidewall inclines might not be more extreme than 1 vertical to 2 even so as to encourage establishment of the bedding materials and the engineered liner(s).

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Pit Design and Construction If site-particular conditions don\'t take into account consistence with least necessities in the NTO, then the administrator must present a pit plan which is confirmed by a Professional Engineer, subject to survey and endorsement by the Director preceding development of the pit.

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Hydrotesting After establishment of the highest liner and preceding working the pit, the manufactured liner(s) might be tried by filling the pit with no less than four (4) feet of new water, measured from the base of the pit (not to surpass the two (2) foot freeboard necessity). The administrator should screen the pit for breaks for a time of seventy-two (72) hours preceding starting operations.

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Pit Monitoring Pit liquid levels might be observed utilizing a pit level marker at any rate once every twelve (12) hours at whatever point liquid is available in the pit in amounts more noteworthy than de minimis sums. The checking recurrence should increment to once every six (6) hours when the pit is in effect effectively utilized for penetrating, finishing or creation operations. The administrator must stop utilization of the pit inside forty-eight (48) hours if there is any watched loss of uprightness from the pit liner or if the administrator associates a misfortune with more than five hundred (500) barrels of fluid from the pit, in light of liquid level estimations or throughput estimations.

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Suspension of Use If operations are suspended and the pit is not being used for more than seven (7) timetable days, then liquids in the pit must be evacuated with the end goal that exclusive de minimis measures of liquids are left in the pit to hold down the engineered liner(s). In the event that operations are suspended for more than six (6) months, then the pit should be shut, unless particularly affirmed by the Director.

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