General Installation Details. 1  Clearances All double check valve (DCV) and reduced pressure zone (RPZ) backflow prevention assemblies are designed for in-line service and must be installed to prevent freezing, flooding and mechanical damage with adequate space to facilitate maintenance and testing.
Dr Margaret Chan. Dr Margaret Chan is the Director-General of WHO and was first appointed by the World Health Assembly on 9 November 2006. The Assembly appointed Dr Chan for a second five-year term at its sixty-fifth session in May 2012. Dr Chan's current term began on 1 July 2012 and will continue until 30 June 2017.
Director Salary. Director average salary is $105,442, median salary is $99,900 with a salary range from $20,000 to $1,100,000. Director salaries are collected from government agencies and companies.