"Site improvement" means the demolishing or removing of improvements, trees, or other vegetation located thereon, or drilling test holes or the grading, filling, or otherwise improving of any lot or tract of land or the street, highway, or sidewalk in front of or adjoining any lot or tract of land, or constructing or installing sewers or other public utilities therein, or constructing any areas, vaults, cellars, or rooms under said sidewalks or making any improvements thereon.
(Added by Stats. 1969, Ch. 1362, Sec. 2.)