(1) The department may enter and inspect any LOSS site or LOSS facility to determine compliance with chapter 70.118B RCW, Large on-site sewage disposal systems or this chapter:

(a) On any weekday that is not a legal holiday between the hours of 8:00 a.m. and 5:00 p.m.; and

(b) At any time with the consent of the owner or owner's agent.

(2) The department may inspect:

(a) All records, including records of O&M;

(b) All data submitted;

(c) All permits; and

(d) The LOSS, all LOSS components, and all LOSS performance equipment.

(3) During an inspection, the department shall have free and unimpeded access to all:

(a) Buildings, warehouses, storage facilities, and other places reasonably considered to be or to have been part of the LOSS;

(b) Ledgers, books, accounts, memorandums, or records required to be compiled or maintained in this chapter; and

(c) Products, components, maintenance supplies, or other material used in connection with the LOSS.

(4) During the inspection, the department may take such samples as may be reasonably necessary to verify compliance.

(5) The owner shall take preventative or corrective action as directed by the department when results of an inspection indicate conditions which may harm or are harming LOSS operation or which are in violation of any requirements of this chapter.