- _ ""., ~' { l ; .. - i. ~ -_\ r ~/ -. ' I ! , t. ii. I i I. -i I. Sheet 3of14 SWG MC Offshore Petroleum, LLC

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MC Offshore Petroleum, LLC SWG-217-832 PPELE DECOMMSSOG APPLCATO Segment #8585 GC 52 CCP to El 316 2" SST Sheet 1of14 (A) DETFCATO OF THE APPLCAT Lease Operator ame: MC Offshore Petroleum, LLC

10 MC Offshore Petroleum, LLC SWG PPELE DECOMMSSOG APPLCATO Segment #8585 GC 52 CCP to El 316 2" SST Sheet 1of14 (A) DETFCATO OF THE APPLCAT Lease Operator ame: MC Offshore Petroleum, LLC Address: 77 Sugar Creek Center Blvd., Ste 45 Sugar Land, TX (B) Contact Person: Ashu Vashisht, President Contact umber: x17 REASO FOR THE OPERATO As per 3 CFR , applicant proposes to decommission the pipeline segment in place. The pipeline segment is no longer necessary due to the end of the economic life of the associated well(s) and platform. (C) DESCRPTO OF THE PPELE Table 1 summarizes the pipeline segment parameters. The entire length of the pipeline segment is proposed to be decommissioned in place. Applicant hereby requests a waiver from the requirements of 3 CFR to remove the pipeline. ote: 2' will be removed from the GC 52 CPP and 2' from the El 316 2" SST. The remaining pipeline length will be 153,473 feet. Applicant also requests a waiver from the requirements of 3 CFR (b) to pig the pipeline. T bl 1 arameters o e 1pe me repose d f or D ecomm1ss1onmg Segment Origin Terminus Length Diameter Service a e p t th p r P 8585 GC 52 CPP El316 2" SST 153,513' 12" OL (D) DECOMMSSOG PROCEDURES Please see attached work procedure.

11 MC Offshore Petroleum, LLC SWG PPELE DECOMMSSOG PROCEDURE Segment #8585 GC 52 CPP to El 316 2" SST Sheet 11 of 14 The dive/rov crew and equipment will mobilize to vessel at dock of convenience. The filtration crew and equipment will mobilize to a utility vessel of opportunity. Each vessel will complete a safety meeting and a HAZD analysis. Once in the field, the diving/rov supervisor and the filtration supervisor will meet or speak with the MC Offshore Petroleum representative and the platform operator to discuss flushing operations, filtration of the pipeline contents and abandonment of the pipeline in-place. Segment #8585: 12" Pipeline from GC 52 CPP (62' wd) to El 316 2" SST (23' wd) 1. Flush the 12" Pipeline: a. Once operational plans have been established, the dive/rov vessel will proceed to the El 316 2" SST coordinates and position the vessel over the SST location. b. The filtration crew will secure the utility vessel at GC 52 CPP. c. The filtration crew at the GC 52 CPP platform will identify an appropriate location to tie in to the pipeline segment d. The dive crew will locate the 12" pipeline segment 8585 located at an unknown depth below natural bottom utilizing side scan sonar and/or magnetometer. e. Divers will locate ball valve in the SST and CLOSE fully while counting turns. Then the diver will then OPE to OPE. f. Filtration crew will establish contact with the diving crew and ensure that all valves are ready to accept fluids. g. Radio communications will be maintained between the dive crew and the filtration crew during the flushing operations. h. The capacity of a single volume of the 12" pipeline is 21,64 barrels or 844,696 gallons. The filtration crew will push a pig to the SST with sea water to the OPE ball valve at the SST. Product will travel ahead of the pig into the 2" SST system. i. Once the pig has been received at SST, the filtration crew will set up and prepare to receive and process fluids from the SST.

12 MC Offshore Petroleum, LLC SWG PPELE DECOMMSSOG PROCEDURE Segment #8585 GC 52 CPP to El 316 2" SST Sheet 12 of 14 j. Divers will uncover the remaining 2" SST. Divers will utilize a hydraulic jack hammer to separate and remove any 3/1 sand cement bags as necessary. k. Divers will locate and identify each of the valves on the SST and the flange furthest from the SST as the separation point for final decommissioning.. Divers will determine if there is a bypass line present to tie into. m. f a bypass line exists, the divers will ensure all bypass valves are in the closed position and locate the blind flange. Divers will open the bleeder valve and ensure there is no pressure on the pipeline flange. n. Divers will remove the blind flange and connect the flushing flange with the flushing hose connected. o. f there is not a bypass line present, divers will ensure all SST valves are in the closed position. p. Divers will ensure there is no pressure on the pipeline at the GC 52 CPP platform and at the 2" SST. q. Divers shall set the pollution dome over the flange furthest from the SST and disconnect the flanges. r. Divers will install a flange on the 12" pipeline end with a flushing hose attached. s. The dive/rov vessel will flush by pumping sea water into the pipeline. The filtration crew will monitor returns and perform EPA bucket sheen test. They will continue pumping sea water until negative test results are obtained from sheen test. t. Once complete, the filtration crew will close all valves and disconnect hoses. u. The pipeline pressure will be bleed to zero psig. v. The filtration vessel will move off work location to dock to have its contents properly treated and disposed of, in accordance with all federal and state regulations.

13 MC Offshore Petroleum, LLC SWG PPELE DECOMMSSOG PROCEDURE Segment #8585 GC 52 CPP to El 316 2" SST Sheet 13 of Remove the pipeline segment at the El 316 2" SST: a. The divers wilt cold cut the 12" pipeline segment 2 feet upstream of the flange and remove the 2' section of pipe to the surface. b. The dives will install a 12" blind flange with a bleeder valve on the SST and tighten with a hydraulic impact. c. The open pipeline end will be plugged (using a plumber's plug or similar devise) to prevent spillage. d. The divers will hand jet the pipeline end for a minimum 3' of cover. e. The divers will install Y2 of a pallet sandbags over the pipeline end and take reading on top of the sand bags. f. The divers will install sandbags on the SST as necessary. 3. Remove the pipeline deck to jacket location and tube turn at the GC 52 CPP: a. Dive/ROV vessel will reposition to GC 52 CPP. b. The topside crew of dive/rov vessel will "cold-cut" the 12" riser just above the(+) 1 O' elevation of the platform and remove a 5 ft. section of the riser. This action is to assist future removal operations for the platform. c. ROV will locate the 12" tube turn at the base of the riser and 2 ft. of the pipeline. d. ROV cut the riser 5 ft. above the natural bottom, cut the pipeline 2 ft. from the tube-turn and recover the tube turn to the surface. e. The open pipeline end will be plugged (using a plumber's plug or similar devise) to prevent spillage. f. The ROV will place protective concrete mat over end to provide cover. g. The ROV will take reading on top of the protective concrete mat. h. The dive/rov vessel will demob from location.

14 MC Offshore Petroleum, LLC SWG PPELE DECOMMSSOG PROCEDURE Segment #8585 GC 52 CPP to El 316 2" SST Sheet 14of14 ote: Ends of riser bend and pipe sections are to be wrapped with plastic, checked for ORM and sealed to prevent spillage during transport. Divers/ROV will supply the on-site Company Representative with a drawing detailing work performed and depth readings taken. Within 3 days after abandonment, a written report to the Regional Supervisor will be submitted that includes a summary of the decommissioning operation (including date is was completed), a description of any mitigation measures taken and a statement signed by authorized representative that certifies the pipeline was decommissioned according to the approved application.

Charlottetown Marine Terminal Pipeline Decommissioning Project Description

Charlottetown Marine Terminal Pipeline Decommissioning Project Description 69 Marr Road Unit B Rothesay NB, E2E 3J9 Tel (506) 848-1920 Fax (506) 848-1929 Charlottetown Marine Terminal Pipeline Decommissioning