While standing on the property line of a licensed cannabis grower in a little more than one year's time, a trained operator of a Nasal Ranger device will need to measure 4 or less D/T—dilution over the threshold—for three minutes to determine whether the grower complies with the now amended cannabis ordinance.
Arriving at this number was not simple for the Santa Barbara County Board of Supervisors at its March 17 meeting. From confusion about how the measuring system works to disagreements over what seemed like a reasonable measurement, discussions were filled with technical explanations and differing views on how to effectively regulate cannabis odor.
The Nasal Ranger works by allowing a user to dilute ambient air to detect the strength of an odor, Erinn Briggs, deputy director of the county Energy, Minerals, and Compliance Division, explained to the Sun. The standard D/T ratios that the device uses include 2, 4, 7, 15, 30, and 60.
"Generally speaking, it's really hard for folks to understand D/T without really spending a lot of time talking about it and learning about it," Briggs said. "It's a concept that we don't think about every day."
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