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1 <br /> 1 Testing Hydro-Demolition H dro-Demolition Machines <br /> 2 <br /> 3 The second paragraph is revised to read: <br /> 4 <br /> 5 In the "sound" area of concrete, the equipment shall be programmed to remove concrete to <br /> 6 the nominal scarification depth shown in the Plans with a single pass of the machine. <br /> 7 <br /> 8 6-09.3(5)D Shot Blasting <br /> 9 This section, including title, is revised to read: <br /> 10 <br /> 11 6-09.3(5)D Vacant <br /> 12 <br /> 13 6-09.3(5)E Rotomilling <br /> 14 This section, including title, is revised to read: <br /> 15 <br /> 16 6-09.3(5)E Removing Existing Concrete Overlay Layer by Rotomilling <br /> 17 When the Contractor elects to remove the upper layer of existing concrete overlay, when <br /> 18 present, by rotomilling prior to final scarifying, the entire concrete surface of the bridge deck <br /> 19 shall be milled to remove the surface matrix to the depth specified in the Plans with a <br /> 20 tolerance as specified in Section 6-08.3(5)B. The operating parameters of the rotary milling <br /> 21 machine shall be monitored in order to prevent the unnecessary removal of concrete below <br /> 22 the specified removal depth. <br /> 23 <br /> 24 6-09.3(6) Further Deck Preparation <br /> 25 The first paragraph is revised to read:: <br /> 26 <br /> 27 Once the lane or strip being overlaid has been cleaned of debris from scarifying, the <br /> 28 Contractor, with the Engineer, shall perform a visual inspection of the scarified surface. The <br /> 29 Contractor shall mark those areas of the existing bridge deck that are authorized by the <br /> 30 Engineer for further deck preparation by the Contractor. <br /> 31 <br /> 32 Item number 4 of the second paragraph is deleted. <br /> 33 <br /> 34 The first sentence of the third paragraph is deleted. <br /> 35 <br /> 36 6-09.3(6)A Equipment for Further Deck Preparation <br /> 37 This section is revised to read: <br /> 38 <br /> 39 Further deck preparation shall be performed using either power driven hand tools I <br /> 40 conforming to Section 6-09.3(1)A, or hydro-demolition machines conforming to Section 6- <br /> 41 09.3(1)C. <br /> 42 <br /> 43 6-09.3(6)B Deck Repair Preparation <br /> 44 The second paragraph is deleted. <br /> 45 <br /> 46 The last sentence of the second paragraph (after the preceding Amendment is applied) is <br /> 47 revised to read: <br /> 48 <br /> 49 In no case shall the depth of a sawn vertical cut exceed 3/ inch or to the top of the top steel <br /> 50 reinforcing bars, whichever is less. <br /> City of Everett Page AM-62 Amendments <br /> Everett Station 80 Stall Parking Expansion June 2019 <br />