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i <br /> I <br /> 110-1._ OBSTRUCTIONS <br /> Attention is directed to Section 8-1.10, "Utility and Non-Highway Facilities," and Section 15, <br /> 'Existing Highway Facilities,"_of the Standard Specifications and these special provisions. <br /> Attention is directed to the existence of certain underground facilities that may require <br /> special precautions be taken by the Contractor to protect the health, safety and welfare of <br /> workers and of the public. Facilities requiring special precautions include, but are not limited to: <br /> conductors of petroleum products, oxygen, chlorine, and toxic or flammable gases;.natural gas in <br /> pipelines greater than 150 rnm in diameter or pipelines operating at pressures greater than <br /> 415 kPa (gage); underground electric supply system conductors or cables, with potential to <br /> ground of more than 300 V, either directlyburied in <br /> or a duct or conduit which do not have <br /> concentric grounded or other effectively grounded metal shields or sheaths. <br /> The Contractor shall notify the Engineer and the appropriate regional notification center for <br /> operators of subsurface installations at least 2 working days, but.not more than 14 calendar days, <br /> prior to performing any excavation'or other work close to any underground pipeline, conduit, <br /> duct, wire or other structure. Regional notification centers include, but are not limited to, the <br /> following: <br /> Notification Center Telephone Number <br /> Underground Service Alert-Northern California(USA) 1-800-642-2444 <br /> 1-800-227-2600 <br /> Underground Service Alert-Southern California(USA) 1=800-422-4133 <br /> 1-800-227-2600 <br /> I Contractor shall have a sub contractor and an utility <br /> .1 locating <br /> service. <br />'i <br />