If the owner of property upon which waste tires are unlawfully stored, stockpiled, or accumulated refuses to allow the board or its contractors access to enter onto the property and perform all necessary cleanup, abatement, or remedial work as authorized under Section 42846, the board or its contractors shall be permitted reasonable access to the property to perform that activity if an order setting civil liability has been issued or obtained pursuant to Article 6 (commencing with Section 42850) by the board, or by its designee pursuant to subdivision (c) of Section 42850, against the property owner, and the board finds that there is a significant threat to public health or the environment.