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Pacific Gas and & E/ecttic Company' wide trench being dug along a 36 inch pipeline, the centerline of the trench would need to be at least 54 inches [24/2+ 24+ 36/2 = 54] away, or be entirely dug by hand.) Watarj¢tting to assist vacuum excavating must be limited to 7000 psig and directed ata 40` angle to the pipe. All pile driving must be kept a minimum of 3 feat away. Any plans to expose and support a PGB.E gas transmission pipeline across an open excavation Head to be approved by PGB.E Pipeline Services in writing PRIOR to pertorming the work. 6. Boring/Trenchlass Installations: PG&E Pipeline Services must review and approve all plans to bore across or parallel to (within 70 feet)a gas transmission pipeline. There are stringent criteria to pothole the gas transmission facility at regular intervals for all parallel bore installations. For bora paths that cross gas transmission pipelines perpendicularly, the pipeline must ba potholed a minimum of 2 feat in the horizontal direction of the bore path and a minimum of 72 inches in the vertical direction from the bottom of the pipe with minimum clearances measured From the edge of the pipe in both directions. Standby personnel must watch the locator trace (and every ream pass)the path of the bora as it approaches the pipeline and visually monitor the pothole (with the exposed transmission pipe) as the bore traverses the pipeline to ensure adequate clearance with the pipeline. The pothole width must account for the inaccuracy of the locating equipment. 7. Substructures: All utility crossings of a gas pipeline should be made as close to perpendicular as feasible(g0' +/_ 75"). All utility lines crossing the gas pipeline must have a minimum of 72 inches of separation from the gas pipeline. Parallel utilities, pole bases, water line 'kicker blocks', storm drain inlets, water meters, valves, back pressure devices or other utility substructures are not allowed in the PGB,E gas pipeline easement. If previously retired PG&E facilities are In conflict with proposed substructures, PGB.E must verify they are safe prior to removal. This includes verification testing of the contents of the facilities, as wall as environmental testing of the coating and internal surtacas. Timelines for PG&E completion of this verification will vary depending on the type and location of facilities in conflict. S. Structures: No structures are to be built within the PG&E gas pipeline easement. This includes buildings, retaining walls, fences, decks, patios, carports, septic tanks, storage sheds, tanks, loading ramps, or any structure that could limit PGB,E's ability to access its facilities. 9. Fencing: Permanent fencing is not allowed within PGSE easements except for perpendicular crossings which must include a 76 Foot wide gate for vehicular access. Gates will be secured with PGB.E corporation locks. 70. Landscaping: Landscaping must b¢designed to allow PGS.E to access the pipeline for maintenance and not intertere with pipeline coatings or other cathodic protection systems. No trees, shrubs, brush, vines, and other vegetation may be planted within the easement area. Only those plants, ground covers, grasses, flowers, and low-growing plants that grow unsupported to a maximum of four feat(4') in height at maturity may be planted within the easement arca. PG8LE Gas and Electric Facilities Page 3