Agenda - Council - 06/27/2017 - Laserfiche WebLink

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during pipe lowering operations except as necessary to remove pipe slings. The discharge of trench dewatering pumps shall be directed to natural drainage channels or storm water drains. Draining trench water into sanitary sewers or combined sewers will not be permitted. The Contractor shall install and operate a dewatering system of wells or points to maintain pipe trenches free of water whenever necessary or as directed by the Engineer. Unless otherwise specified in the Plans, Specifications, and Special Provisions such work shall be considered incidental. All costs of excavating below grade and placing foundation or bedding aggregates as required shall be included in the bid prices for pipe items to the extent that the need for such work is indicated in the Contract provisions and the Proposal does not provide for payment under separate Contract Items. Any excavation below grade and any foundation or bedding aggregates required by order of the Engineer in the absence of Contract requirements will be compensated for separately. If examination by the Engineer reveals that the need for placement of foundation aggregate was caused by the Contractor's manipulation of the soils in the presence of excessive moisture or lack of proper dewatering, the cost of the corrective measures shall be borne by the Contractor. B6 Contaminated Materials and Regulated Wastes If during the course of the Project, the Contractor unexpectedly encounters any of the following conditions indicating the possible presence of contaminated soil, contaminated water, or regulated waste, the Contractor shall immediately stop work in the vicinity, and notify the Engineer. At the direction of the Engineer, a documented inspection and evaluation will be conducted prior to the resumption of work. The Contractor shall not resume work in the suspected area without authorization by the Engineer. Indicators of contaminated soil, groundwater or surface water include, but are not limited to the following: (1) Odor including gasoline, diesel, creosote (odor of railroad ties), mothballs, or other chemical odor. (2) Soil stained green or black (but not because of organic content), or with a dark, oily appearance, or any unusual soil color or texture. (3) A rainbow color (sheen) on surface water or soil. Indicators of regulated wastes include, but are not limited to the following: (1) Cans, bottles, glass, scrap metal, wood (indicators of solid waste and a potential dump site). (2) Concrete and asphalt rubble (indicators of demolition waste). (3) Roofing materials, shingles, siding, vermiculite, floor tiles, transite or any fibrous material (indicators of demolition waste that could contain asbestos, lead or other chemicals). (4) Culverts or other pipes with tar -like coating, insulation or transite (indicators of asbestos). Page 11