Drug/Alcohol Testing Purpose. The City and the Lodge recognize that the ability of a member to properly perform his or her duties depends, in part, on a workplace which is free of substance abuse. In an effort to promote public safety, to provide members who may be drug or alcohol dependent with an opportunity for treatment and for remaining productive members of the Division of Police, and in recognition that substance abuse is a problem which, depending on individual circumstances, may require intervention, rehabilitation, or discipline, it is the purpose of this Article to provide a method for responding to the risks presented by the presence of substance abuse in the workplace by: