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First reading of Title 12 land‑use amendments clears commission; debate over chemical root barriers prompts staff follow‑up
Summary
The commission approved first reading of updates to Title 12 of the City Code (land use), clarifying environmental site-assessment requirements, tree root-barrier specifications (24 inches) for small islands and swales, and a new soil mix standard; public concern about chemical root barriers prompted staff to agree to research and report back.
The Weston City Commission on April 7 approved on first reading a package of amendments to Title 12 (Land Use), clarifying environmental site‑assessment requirements for common area transfers, specifying 24‑inch root barriers for narrow terminal islands and swale tree plantings (with exemptions for single‑family and multifamily residential zones), and requiring an improved soil mix for city plantings.
City staff described the package as largely editorial in some sections but highlighted three substantive changes: clarifying the content and responsible party for environmental site assessments when common area property is transferred to the city (section 120.03); specifying a 24‑inch root barrier height for terminal islands under 11 feet wide (section 123.14(b)(2)); and specifying a 24‑inch root barrier for swale tree requirements (section 123.16) with an exemption for single‑family and multifamily residential areas. Staff also proposed an updated soil mix requirement in section 123.18(d).
Commission discussion focused heavily on the root‑barrier language and its implementation. Commissioner Molina McPhee emphasized resident choice and agreed with the exemption for residential zones. Vice Mayor Henry Mead and others asked staff whether the exemption covered homeowners associations; staff confirmed it did. Commissioner Jaffe requested further information about the chemicals used in some barrier products and suggested staff expert Mr. Tesaro follow up with research.
During public comment and discussion, a participant asked the city whether the city uses chemical root barriers. City Manager Decker said the city has used chemical root barriers in its past practice and offered to have staff research the issue and return with information. Ted (a city landscape/tree professional) said the city typically uses chemical root barriers, usually installed on one side or the side being protected, and that crews do not encircle the entire tree.
The motion for first reading was moved by Commissioner Jaffe and seconded by Vice Mayor Mead; the roll call vote was unanimous. Staff said they can bring additional research about chemical versus nonchemical root barriers back to the commission as a standalone item even after the second reading if commissioners request it.
The amendments will return for second reading; staff did not indicate at the meeting that any language would be removed because of the chemical‑barrier concerns, but they committed to follow up research so the commission may consider further refinements.
