Your client, Sam, lives in Worcester, Massachusetts. He owns a downtown Worcester property that is zoned for commercial office space. However, since there is already plenty of office space available in Worcester, Sam does not feel that it would be wise to build another office building. Instead, he wishes to build a gas station to service the downtown traffic.

He asks you to explain, based on Massachusetts law , what standard your client must show to get a variance to allow him to build the gas station.