(1) "adequate" means that which is necessary to accomplish the intended purpose in keeping with generally accepted public health practices;
(2) "Alaska Plumbing Code" means the Uniform Plumbing Code, adopted by reference in 8 AAC 63.010 and supplemented by 8 AAC 63.020 and 8 AAC 63.030;
(3) "department" means the Department of Environmental Conservation;
(4) "easily cleanable" means that surfaces are readily accessible and made so that residue may be effectively removed by normal cleaning methods;
(5) "extensively remodeled" means a modification or improvement which entails an expense equal to or exceeding 25 percent of the taxable value of the facility before initiation of the modification or improvement;
(6) "operator" means the person or entity ultimately responsible for the operation of a facility; and
(7) "sanitized" means treated according to an effective bactericidal process that destroys pathogenic microorganisms.