Nonresidential uses in all zones which cause off-site impacts on uses in the R, C, CI, IR, and OS zones are required to meet the standards of this Chapter.

1. A.  Use exemption. Retail Sales and Service Uses, as described in Portland City Code Chapter 33.920, are exempt from this standard.
2. B.  Existing operation exemption.  The odor standard does not apply to machinery, equipment, and facilities which were at the site and in compliance with existing regulations at the effective date of these regulations. Any new or additional machinery, equipment, and facilities must comply with the standards of this chapter. Documentation is the responsibility of the proprietor of the use if there is any question about when the equipment was brought to the site. 

1. A.  Odor standard. Continuous, frequent, or repetitive odors may not be produced. The odor threshold is the point at which an odor may just be detected.
2. B.  Exception. An odor detected for less than 30 minutes per day is exempt.

An investigation into an alleged odor standard violation will be initiated when five or more individual complaints from five or more people are received within a 30-day period. The complainants must reside within 150 feet of a property line of the site with the offending odor.