Notre-Dame clean-up begins Wednesday amid lead poisoning fears The square in front of Notre-Dame cathedral and the adjacent streets will be treated from Wednesday, with the objective of being "definitively cleared by the end of the month", says Anne Souyris, assistant chief of health services at Paris City Hall. Concerns from associations and unions remains high regarding the risk of lead contamination. IMAGES AND SOUNDBITES(COMPLETES VID1374795_EN)