6- 1. General. The success of a dewatering opera­tion finally hinges on the proper operation, mainte­nance, and control of the system. If the system is not operated and maintained properly, its effectiveness may soon be lost. After a dewatering or pressure relief system has been installed, a full-scale pumping test should be made and its performance evaluated for ade­quacy or need for any modification of the system. This test and analysis should include measurement of the initial water table, pump discharge, water table in ex­cavation, water table in wells or vacuum in header sys­tem, and a comparison of the data with the original de­sign.

6- 2. Operation.