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(9) CITY OF SANTA ANA <br /> joints,sealing,caulking,diapering and including rubber gasketjoints, <br /> pointing and any and all other services; <br /> Rock slinger; Rotary scarifier or multiple head concrete <br /> chipping scarifier;Steel headerboard and guideline setter; Tamper, Barka, <br /> Wacker and similartype;Trenching machine, hand-propelled <br /> GROUP 4:Asphalt raker, lute person, ironer,asphalt dump person, and <br /> asphalt spreader boxes(all types); Concrete <br /> core cutter(walls, floors or ceilings), grinder orsander, <br /> Concrete saw person, cutting walls or flat work, scoring <br /> old or new concrete; Cribber,shorer,lagging, sheeting and trench <br /> bracing, hand-guided lagging hammer; Headrock <br /> slinger; Laborer, asphalt- rubber distributor boot person; <br /> Laser beam in connection with laborers'work; Oversize concrete <br /> vibrator operator,70 lbs.and over; Pipelayer <br /> performing all services in the laying and installation of pipe from the <br /> point of receiving pipe in the ditch until completion of operation, <br /> including any and all forms of <br /> tubular material,whether pipe, metallic or non-metallic, conduit and any <br /> other stationary type of tubular device <br /> used for the conveying of any substance or element,whether <br />