All graded surfaces and materials, whether filled, excavated, transported or stockpiled, shall be wetted, protected or contained in such a manner to prevent dust or spillage upon adjacent property or streets. Equipment, material and roadways on the site shall be used in such manner or so treated as to prevent excessive dust conditions. (Ord. 16432 § 6(2), 3-10-92. Code 1995 § 66-122.)