For the purpose of the Washington state public works law, chapter 39.12 RCW, terrazzo workers create durable and decorative surfaces on floors, walls and ceilings.

The work includes, but is not limited to:

(1) Spreading a one-half inch mixture of sand, cement, and water with trowel to form a base over walls, ceilings, and concrete floors where terrazzo is to be applied.

(2) The cutting and setting of metal or wooden strips into the terrazzo base so that the top edges form a design or pattern and define the level of the finished floor surface.

(3) Spreading a mixture of cement terrazzo, magnasite terrazzo, polyacrylate terrazzo, epoxy matrix terrazzo, exposed aggregate, rustic or rough washed for the interior or exterior of buildings, over a terrazzo base with float and trowel to form the finished surface.

(4) Spreading of any other kind of mixture of plastics composed of chips or granules of marble, granite, blue stone, enamel, mother-of-pearl, quartz, ceramic colored quartz and all other kinds of chips or granules when mixed with cement, rubber, neoprene, vinyl, magnesium, chloride or any other resinous or chemical substances used for seamless flooring systems, and all other binding materials when used on any part of the interior and exterior of buildings and on fountains, swimming pools, etc.