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Ll C. Precautions ' The electrical contractor must take every reasonable precaution to avoid interferences. In the vicinity of a suspected interference, excavations shall be dug by hand. ' D. Excavating, Drilling and Backfilling 1. Materials for backfill shall be as specified in Section 2C, Excavation and Backfill for Utility Systems. 2. Locate and protect existing utilities and other underground work in a manner which will insure that no damage or service interruption will result from excavating and backfilling. 3. Protect property from damage which might result from excavating and backfilling. 4. Protect persons from injury at excavations, by shoring up, barricades, warnings and illumination. ' 5. Coordinate excavations with weather conditions, to minimize the possibility of washouts, settlements and other damages and hazards. 6. Dewater excavations as necessary. Protect excavations from inflow of surface water. Pump minor inflow of groundwater from excavations; protect excavations from major inflow of groundwater by installing temporary sheeting and waterproofing. Provide adequate barriers which will protect other excavations and below grade property from being damaged by water, sediment, or erosion from or through the electrical work excavations. 7. No organic material is permitted in backfill. All vegetation, peat, sod or other organic matter shall be removed from the premises. 8. Except under roadways, backfill material shall be clean sand or shell rock. No debris or trash may be used as backfill. 9. Under roadways, backfill material shall be the same as comprising the road bed. 10. Backfill excavations to 8 inches high courses of backfill material, uniformly compacted to 95 percent density per ASTM Standard D1557 using power- driven hand - operated compaction equipment. Watering backfill is not an adequate method of compaction. I 07/06 16050 -8 05 -5564