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A=COM 4.11 Proposed Subsurface Investigation Locations 4.11.1 All proposed subsurface locations will be reviewed in comparison to subsurface and overhead utilities and subsurface installations and adjustments made as necessary. 4.11.2 Minimum set back distances 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 set back distances are a minimum; government regulations and utility requirements may dictate a greater set back distance. 4.12 Utility Clearance Investigation Location Confirmation 4.12.1 As applicable, all client on-site safety procedures shall be understood and adhered to. 4.12.2 Hand exposure or non-destructive ground disturbance techniques to expose an underground utility or subsurface installation are necessary to accurately determine size, location and alignment prior to mechanical excavation or intrusive subsurface work in the vicinity of that utility or installation. 4.12.3 Non-destructive ground disturbance techniques shall be acceptable to the owner of the buried utility (i.e. hydro-vacuum temperature or pressure). 4.12.4 Hydro-vacuum or air-knife require proper grounding equipment at sites where the subsurface may contain flammable gases, liquids, or vapors 4.12.5 Jurisdictional, land owner, client and utility owner requirements shall be consulted to determine the distance of the hand exposure zone, and what requirements,when met, may allow mechanical excavation within these zones. 4.12.6 At a minimum, all underground utilities and subsurface installations within a 5 feet(1.5 meter) radius of the work site shall be identified and physically located (seen)before use of mechanical excavation equipment is permitted. Jurisdictional, client, land owner and utility owner requirements shall be consulted as the required hand exposure radius may be larger. 4.12.7 In urban areas, proposed subsurface locations will be cleared by hand/non-destructive technique to 5 feet(1.5 meters)(soil borings and wells)or 12 inches (30 centimeters)(soil gas sampling probes)using non-mechanical methods. • In non-urban areas, clearing by hand/non-destructive technique should be conducted if possible and shall be conducted as required by the given jurisdiction. • Hand/non-destructive technique clearance should be extended if locations of deep utilities and structures are not known. • Hand exposure or non-destructive ground disturbance techniques should extend a minimum of 24 inches(60 centimeters)below the intended ground disturbance depth to minimize the hazard of mechanical equipment contact with any utility or installation. 4.12.8 Mechanical equipment and attachment dimensions shall be considered when establishing the zone in which all underground utilities and subsurface installations are physically located (seen)prior to the use of that equipment. The radius may require expanding to maintain safe distances when using large equipment. 4.13 Utility Strikes 4.13.1 Utility strikes shall be reported in accordance with S3AM-004-PR1 Incident Reporting, Notifications &Investigation. 4.13.2 All damaged utilities shall be repaired by a qualified and/or licensed professional. 5.0 Records Underground Utilities(S3AM-331-PR1) Revision 2 September 30,2020 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. Page 7 of 8