The procedural requirements of this chapter shall not apply to any person conducting a remedial action at a facility pursuant to a consent decree, order, or agreed order issued pursuant to chapter
70A.305 RCW, or to the department of ecology when it conducts a remedial action under chapter
70A.305 RCW. The department of ecology shall ensure compliance with the substantive requirements of this chapter through the consent decree, order, or agreed order issued pursuant to chapter
70A.305 RCW, or during the department-conducted remedial action, through the procedures developed by the department pursuant to RCW
70A.305.090.