Failure or refusal to permit entry or inspection; Failure to obtain initial firm certification from EPA; Failure of a firm to assign a certified renovator; and Failure to post signs clearly defining the work area and warning occupants and other persons not involved in renovation activities to remain outside of the work area; to prepare, to the extent practicable, signs in the primary language of the occupants; and/or to post signs before beginning the renovation and makes sure they remain in place and readable until post-renovation cleaning verification have been completed.