“The grounding system must be verified periodically at the frequency established in a user defined ESD Control Program Plan.” [Grounding ANSI/ESD S6.1-2009 section 6.2 Verification Frequency]

“All of the grounding conductors from each of the ESD technical elements (excluding level 2 technical elements) used within an EPA shall be terminated at the same electrically equivalent point. The common point ground may be a terminal strip, bus bar or any other convenient configuration that is, within itself, electrically continuous to no greater than 1 ohm measured from point to point with an ohmmeter”. [Grounding ANSI/ESD S6.1-2009 section 5.2.1 Common Point Ground]