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Pacific Gas and <br /> Electric Company <br /> 7 <br /> wide trench being dug along a 36 inch pipeline, the centerline of the trench would need to be at <br /> least 54 inches [24/2 + 24 + 36/2 = 54] away, or be entirely dug by hand.) <br /> Water jetting to assist vacuum excavating must be limited to 1000 psig and directed at a 400 <br /> angle to the pipe. All pile driving must be kept a minimum of 3 feet away. <br /> Any plans to expose and support a PG&E gas transmission pipeline across an open excavation <br /> need to be approved by PG&E Pipeline Services in writing PRIOR to performing the work. <br /> 6. Boring/Trenchless Installations: PG&E Pipeline Services must review and approve all <br /> plans to bore across or parallel to (within 10 feet) a gas transmission pipeline. There are <br /> stringent criteria to pothole the gas transmission facility at regular intervals for all parallel bore <br /> installations. <br /> For bore paths that cross gas transmission pipelines perpendicularly, the pipeline must be <br /> potholed a minimum of 2 feet in the horizontal direction of the bore path and a minimum of 12 <br /> inches in the vertical direction from the bottom of the pipe with minimum clearances measured <br /> from the edge of the pipe in both directions. Standby personnel must watch the locator trace <br /> (and every ream pass) the path of the bore as it approaches the pipeline and visually monitor <br /> the pothole (with the exposed transmission pipe) as the bore traverses the pipeline to ensure <br /> adequate clearance with the pipeline. The pothole width must account for the inaccuracy of the <br /> locating equipment. <br /> 7. Substructures: All utility crossings of a gas pipeline should be made as close to <br /> perpendicular as feasible (90° +/- 150). All utility lines crossing the gas pipeline must have a <br /> minimum of 12 inches of separation from the gas pipeline. Parallel utilities, pole bases, water <br /> line 'kicker blocks', storm drain inlets, water meters, valves, back pressure devices or other <br /> utility substructures are not allowed in the PG&E gas pipeline easement. <br /> If previously retired PG&E facilities are in conflict with proposed substructures, PG&E must <br /> verify they are safe prior to removal. This includes verification testing of the contents of the <br /> facilities, as well as environmental testing of the coating and internal surfaces. Timelines for <br /> PG&E completion of this verification will vary depending on the type and location of facilities in <br /> conflict. <br /> 8. Structures: No structures are to be built within the PG&E gas pipeline easement. This <br /> includes buildings, retaining walls, fences, decks, patios, carports, septic tanks, storage sheds, <br /> tanks, loading ramps, or any structure that could limit PG&E's ability to access its facilities. <br /> 9. Fencing: Permanent fencing is not allowed within PG&E easements except for <br /> perpendicular crossings which must include a 16 foot wide gate for vehicular access. Gates will <br /> be secured with PG&E corporation locks. <br /> 10. Landscaping: Landscaping must be designed to allow PG&E to access the pipeline for <br /> maintenance and not interfere with pipeline coatings or other cathodic protection systems. No <br /> trees, shrubs, brush, vines, and other vegetation may be planted within the easement area. <br /> Only those plants, ground covers, grasses, flowers, and low-growing plants that grow <br /> unsupported to a maximum of four feet (4') in height at maturity may be planted within the <br /> easement area. <br /> PG&E Gas and Electric Facilities Page 3 <br />