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404302831 15 96850 TEP ROCKY MOUNTAIN LLC

1058 COUNTY ROAD 215

PARACHUTE CO 81635 Michael Gardner 970 623-4875 Kris Rowe TEP 2025-08-01T10:23:52.47-06:00 DRAFT krisrowe 2025-08-01T10:23:52.47-06:00 krisrowe Kris.Rowe@flywheelenergy.com 1.00000 Michael.Gardner@flywheelenergy.com krisrowe krisrowe 2025-08-01T12:01:22.897-06:00 404302831 P Arco Deep 1-27 GARFIELD NWNW 27 6S 97W 6 39.492991 -108.207119 Unlined 282 Y 230 100 5280 189 88 19 56283 0 0 Earthen Pit 0 De-watered / Solidified Y N 05 00 322539 � � � � � � � � � � � � � Actual 2025-07-14T00:00:00-06:00 N Air emissions from drill cuttings are considered to be "pre-production" phase and currently are not regulated by CDPHE. � � Y � � � � No off-site disposal of drill cuttings anticipated at this time. Drill cuttings will be treated (mixing, blending, amending) to meet ECMC 915-1 standards. Once 915-1 standards have been met, cuttings trench will be closed and reclaimed as described in Form 2A (attached). In the event that off site disposal of drill cuttings is needed, they will be managed at the Starkey Gulch CWMF as outlined within the approved Form 28 (Facility ID 476647), or at an approved commercial disposal facility that is permitted and authorized to accept wastes associated with drilling. Earthen Pit 0 0 false true false 5280 5280 1000 1000 2 404302831 Arco Deep 1-27 - Cuttings Trench All drill cuttings will be treated/amended onsite to meet ECMC 915-1 clean up standards and will be disposed on site. Any cuttings exceeding the volume of the cuttings trench will be managed at the Starkey Gulch CWMF Cuttings Trench as outlined within the approved Form 28 (Facility ID 476647), or at an approved commercial disposal facility that is permitted and authorized to accept wastes associated with drilling. In compliance with Rule 911.a, a Form 27 will be submitted to document final closure of the Arco Deep 1-27 drill cuttings trench and to convey sampling data that supports closure of the cuttings trench. Under the Pit Design and Construction Information section, the "Calculated Working Volume" of the cuttings trench has been converted from cubic yards (11,704 cy) to barrels (~56,283 bbls). Similarly, the daily flow rate has been estimated / converted from cubic yards to barrels. Also, the "Operational Lifespan, per manufacturer's specs (years)" is a required value to complete this Form 15; however it is not applicable to an earthen pit where there are no primary or secondary liners. Therefore, a default value of 1000 years was used. It is estimated that a total of 5,920 cy of raw (unmixed) drill cuttings will be generated, calculating to a total of 11,804 cy after mixed at a 1:1 ratio. Refer to the attached documents for site diagrams with cross sections, waste management plan, aerial imagery maps and sensitive area determination. 404302831 404302831 PIT PERMIT SUBMITTED 404302831.pdf 404302831 404303060 DESIGN: PLAN AND CROSS SECTION Arco Deep 1-27 - Cuttings Trench Cons. Diagram.pdf 357727 404302831 404303065 SENSITIVE AREA DETERMINATION Arco Deep 1-27 - SAD - 403256420.pdf 1329853 404302831 404303067 OTHER Arco Deep 1-27 - Form 2A.pdf 17118653 404302831 404303069 AS BUILT: PLAN AND CROSS SECTION Arco Deep 1-27 - Layout Drawings rev 05-25-2023.pdf 11330456 404302831 404303071 OPERATIONS PLAN Arco Deep 1-27 - Waste Mgt Plan.pdf 4550398 404302831 403135970 02A Thread was being aborted.