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TRENCHING & BACKFILL 02 2020-3 5. Do not proceed with permanent repair or relocation of utilities until written instructions are received from the Engineer. 6. No construction water shall be disposed of in the City's storm drain system. 7. Comply with all conditions and requirements indicated and specified under the specific utility section of these specifications. B. PROTECTION OF PERSONS & PROPERTY: 1. Install all necessary underpinning, shoring, lagging, cribbing, and bracing of ample strength to support adjoining soils, paving and structures. All such items shall be so constructed that they will not interfere with the building of any structural elements, and shall be removed upon completion of the shoring operation. 2. Barricade open depressions and holes occurring as part of this work, and post warning lights on property adjacent to or with public access. 3. Operate warning lights during hours from dusk to dawn each day and as otherwise required. 4. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by operations of Contractor. 5. No trenches shall be left open during non-working hours. 6. Install fences and barricades to secure the area from the public. C. SHORING 1. The Contractor is solely responsible for all bracing and shoring. The Contractor shall forward their application for shoring to the California Division of Industrial Safety for their review. Contractor's application shall include the basic design, assumed soils conditions and estimation of forces to be resisted, together with plans and specifications of the materials and methods to be used, and shall be prepared by a Civil Engineer registered in California. 2. If an application for a shoring permit is required, no excavation in trench section or around structures shall proceed until the approved shoring plan has been received by the Engineer. D. DEWATERING 1. Remove all water, including rain water, encountered during trench and sub- structure work to an approved location by pumps, drains, and other approved methods. 2. Keep excavations and site construction area free from water. E. DUST CONTROL 1. Use means necessary to control dust on and near the work, and on and near off-site areas, if such dust is caused by the Contractor's operations during performance of the Work, or if resulting from the condition in which the Contractor leaves the site.