Chapter 5, Section 510.5.6, is hereby deleted in its entirety and the following provision shall be substituted therefor:

Duct Leakage Test – Prior to the use of or concealment of a grease duct system, a leakage test shall be performed to determine that welded joints and seams are liquid tight. The leakage test shall consist of a light test, water pressure test or an approved equivalent test. The permit holder shall be responsible for providing the necessary equipment and for performing the test. Such test shall be a light test using a 500 watt halogen lamp or equivalent. A light test shall consist of passing a minimum 500 watt halogen lamp or equivalent through the entire section of grease duct. The lamp shall be open and light shall be emitted equally in all directions perpendicular to the interior duct walls. No light shall be visible from the exterior.