When the work has been completed, the undertaking shall ensure that necessary checks are carried out to verify that fibrous asbestos dust has been removed. The concentration of airborne fibrous asbestos must not exceed 0.01 fibres per cm3.Such checks shall be carried out after the area has been completely cleaned and while it is still shut off from the surroundings.If negative pressure has been established, it shall be maintained while the check is carried out.
