so as i already indicated by kelly prets 0 because we are amended the building and health codes we had meetings at the health inspection, planning commission, each of those commissions has recommended the board approve this ordinance and that completes my presentation unless you have questions. we have staff here from the department and mayor's office and planning. thank you. >> thank you very much. supervisor kim? >> thank you. i think this policy makes a lot of sense. since it's been in effect since 1986. i see this is an important policy and what some of the outcomes have been? >> there are dozens or hundreds of projects over the course of the years that have gone through this process that the outcome is rather than either the public through dust contaminated dust in the air or workers getting exposed to contaminated soils, the health department for going through the review, soils are identified and procedures are set up to control dust on the site and measures for workers safety. so there has been a reduction in the public and exposure for contaminated soils by making sure we know