This chapter shall be administered by the Director and shall be construed to assure consistency with the requirements of the federal Clean Water Act, applicable implementing regulations, and any City NPDES permits as amended, revised or reissued. In the event of any conflict between this chapter and any federal or state law, regulation, order or permit, the requirement that establishes the higher standard for public health or safety shall govern. Nothing in this chapter shall preclude enforcement of any other applicable law, regulation, order or permit. Nothing in this chapter is intended to diminish or preempt the authority of the fire department to investigate, clean-up or abate the effects of any hazardous materials under state law or applicable sections of this code, and any such actions of the fire department shall be in addition to, and not in place of, measures set forth in this chapter.