Consistent with the purposes of RCW 70A.300.260 and 70A.300.270, the department is authorized to promote the priority waste management methods listed in RCW 70A.300.260 by establishing or assisting in the establishment of: (1) Consultative services which, in conjunction with any business or industry requesting such service, study and recommend alternative waste management practices; and (2) technical assistance, such as a toll-free telephone service, to persons interested in waste management alternatives. Any person receiving such service or assistance may, in accordance with state law, request confidential treatment of information about their manufacturing or business practices.