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I <br /> 1 <br /> 2 Following the completion of any required further deck preparation the entire lane or strip <br /> 3 being overlaid shall be cleaned to be free from oil and grease, rust and other foreign <br /> 4 material that may still be present.These materials shall be removed by detergent-cleaning <br /> 5 or other method accepted by the Engineer followed by sandblasting. <br /> 6 <br /> 7 After detergent cleaning and sandblasting is completed, the entire lane or strip being <br /> 8 overlaid shall be cleaned in final preparation for placing concrete. <br /> 9 <br /> 10 Hand tool chipping, sandblasting and cleaning in areas adjacent to a lane or strip being <br /> 11 cleaned in final preparation for placing concrete shall be discontinued when final <br /> 12 preparation is begun. Scarifying and hand tool chipping shall remain suspended until the <br /> 13 concrete has been placed and the requirement for curing time has been satisfied. <br /> 14 Sandblasting and cleaning shall remain suspended for the first 24 hours of curing time <br /> 15 after the completion of concrete placing. <br /> 16 <br /> 17 Scarification, and removal of the upper layer of concrete overlay when present, may <br /> 18 proceed during the final cleaning and overlay placement phases of the Work on adjacent <br /> 19 portions of the Structure so long as the scarification and concrete overlay removal <br /> 20 operations are confined to areas which are a minimum of 100 feet away from the defined <br /> 21 limits of the final cleaning or overlay placement in progress. If the scarification and <br /> 22 concrete overlay removal impedes or interferes in any way with the final cleaning or <br /> 23 overlay placement as determined by the Engineer, the scarification and concrete overlay <br /> 24 removal Work shall be terminated immediately and the scarification and concrete overlay <br /> 25 removal equipment removed sufficiently away from the area being prepared or overlaid to <br /> 26 eliminate the conflict. If the grade is such that water and contaminants from the <br /> 27 scarification and concrete overlay removal operation will flow into the area being prepared <br /> 28 or overlaid, the scarification and concrete overlay removal operation shall be terminated <br /> 29 and shall remain suspended for the first 24 hours of curing time after the completion of <br /> 30 concrete placement. <br /> 31 <br /> 32 6-09.3(11) Placing Concrete Overlay <br /> 33 The first sentence of item number 3 in the fourth paragraph is revised to read: <br /> 34 <br /> 35 Concrete shall not be placed when the temperature of the concrete surface is less than <br /> 36 45°F or greater than 75°F, and wind velocity at the construction site is in excess of 10 <br /> 37 mph. <br /> 38 <br /> 39 6-09.3(12) Finishing Concrete Overlay <br /> 40 The third paragraph is deleted. <br /> 41 <br /> 42 The last paragraph is deleted. <br /> 43 <br /> 44 6-09.3(13) Curing Concrete Overlay <br /> 45 The first sentence of the first paragraph is revised to read: <br /> 46 <br /> 47 As the finishing operation progresses, the concrete shall be immediately covered with a <br /> 48 single layer of clean, new or used, wet burlap. <br /> 49 <br /> 50 The last sentence of the second paragraph is deleted. <br /> 51 <br /> 52 The following two new paragraphs are inserted after the second paragraph: <br /> CITY OF EVERETT AMENDMENTS <br /> PACIFIC AVENUE TO INTERURBAN TRAIL BICYCLE SAFETY PROJECT 8/12/2019 <br /> STATE FUND#HLP PB17(014); COE#PW3688 Page AM-62 <br />