You are in charge of putting in water well for a large farm.Unfortunately,there has been a lot of groundwater pollution in the area since it became industrialized almost 200 years ago.Referring to the figure below,how far down should you install the openings of the well in order to have the best chance of getting uncontaminated water? 
Definitions:
Process-oriented Layout
An arrangement of resources in a production or service area designed to streamline operations by grouping similar processes together.
CRAFT Software
A software tool designed for optimizing facility layout by reducing material handling costs through iterative relocation of departments.
Work Cell
A production setup designed around a specific set of processes or jobs that are physically grouped together, often in a manufacturing setting, to improve efficiency and flow.
Assembly Line Workstation
refers to a specific work area within an assembly line designed for the completion of a particular task or the assembly of a particular part of a product.
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