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A=COM 4.10.1 In addition to any minimum requirements the drilling subcontractor may have, prior to set up, adequate site clearing and leveling shall be performed to accommodate the rig and supplies and provide a safe working area. 4.10.2 Clearing the site includes clearing the intended drilling area obstacles and of underground utilities in accordance with S3AM-331-PR1 Underground Utilities. 4.10.3 Drilling or probing shall not commence when tree limbs, unstable ground, or site obstructions cause unsafe tool handling conditions. • The cleared/levelled area should be large enough to accommodate the rig and supplies. • If the rig is positioned on a steep grade and levelling of the ground is impossible or impractical, the wheel of the transport vehicle shall be blocked and other means employed of preventing the rig from moving or toppling over. 4.11 Drilling Activities 4.11.1 Federal/State/Provincial/Territorial regulations that govern drill rig operations and exposed moving parts shall be adhered to. 4.11.2 All applicable client on-site safety procedures shall be understood and adhered to. 4.11.3 Minimum approach distances(MAD)from subsurface and overhead utilities and subsurface installations will be established including 5 feet(1.5 meters)from any subsurface utility, 7 feet(2.1 meters)from the pad surrounding any underground storage tanks, and 10 feet(3 meters)from any overhead energized electrical line(or further depending on line voltage). These approach distances are a minimum; government regulations and utility requirements may dictate a greater set back distance and should be confirmed. 4.11.4 Verify that equipment/energy is isolated when lockout is required: • Refer to operator's manual and S3AM-325-PR1 Lockout Tagout. • Ensure stop switch is activated. • Driller is out of the seat. • Test controls to ensure they do not engage. 4.11.5 In addition to any identified minimum requirements(as applicable, client, drilling subcontractor), the following safety measures shall be taken during drilling, boring or probing operations on site: • The operator and helper shall be present during all active rig operations. • Site personnel shall remain within visual contact of the rig operator. • Hard hats, approved safety boots, safety glasses, and hearing protection shall be worn in the work zone(minimum,the radius around the rig equal to the height of the drill rig mast)of a rig. • Gas monitoring shall be conducted as appropriate. • Hands,feet and other body parts shall be kept away from moving parts, (e.g. hoisted, rotating, pushing, etc.) including augers, drill rods and reamers. • When observing drilling, stand upwind of the drill rig to prevent potential exposure to vapors that may be emitted from the borehole. • The emergency shut-off switch on the rig shall be identified to site personnel and tested on a daily basis by the operator. • Unauthorized personnel shall be kept outside of the established work zone. • Rig crew and other worksite personnel shall not use a cell phone while operating the drill rig or other equipment or within the rig work zone. • Do not drive the rig from hole to hole with the mast(derrick)in the raised position. • Before raising the mast(derrick)look up to check for overhead obstructions. Refer to S3AM- 322-PR1 Overhead Lines. Drilling,Boring,&Direct Push Probing(S3AM-321-PR1) Revision 2 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. Page 6 of 12