Section 20.28.090 Applicability to persons and entities.

No person shall operate or cause to be operated, any steam or hot water boiler plant or ammonia refrigeration plant unless there is a person operating such plant who holds a license of the proper class as required by this code.  
    1. Exception - stationary engineer licensing. The specific entities listed in section 20.28.020, and the following specific persons and entities are exempt from the stationary engineer licensing requirements:
        a. Owner-occupants of single-family dwellings;
        b. Owners and managers of rental dwellings, when boiler plants are less than 50 horsepower;
        c. Tenants of rental dwellings;
        d. Owners and managers of commercial and industrial buildings, when boiler plants are less than 50 horsepower; and
        e. Tenants of commercial and industrial buildings, when boiler plants are less than 50 horsepower.
    2. Exception - refrigeration engineer licensing. The specific entities listed in section 20.28.020, and the following specific persons and entities are exempt from refrigeration engineer licensing requirements:
        a. Owners and managers of commercial and industrial buildings, when there is a documented PSM program in place and approved documents are on file with the inspections services division; and
        b. Tenants of commercial and industrial buildings, when there is a documented PSM program in place and approved documents are on file with the inspections services division.  (Ord. 2000-9646; 90/T-9327)