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Staff flags groundwater, compatibility concerns as developer seeks buffer reduction, septic allowance in rezoning request
Summary
Staff told the Spring Hill Planning Commission that rezoning application RZN20352026 seeks to reduce an existing 150-foot undisturbed buffer to 50 feet while allowing 100 feet for wastewater infrastructure; staff said the change raises potential compatibility and effluent-dispersal risks and requested more justification before a voting meeting.
Planning staff presented rezoning application RZN20352026 at the April 27 work session, saying the applicant proposes to modify the zoning condition on an I-1 site by reducing a previously required 150-foot undisturbed landscape buffer along the western property line to a 50-foot undisturbed strip and permitting disturbance of the remaining 100 feet for on-site wastewater infrastructure.
“While most of the lot is industrial, the natural area strip was created to serve as a buffer between the abutting incompatible uses, residential and industrial,” staff said in the report and warned that introducing subsurface piping and wastewater infrastructure into what was previously a fully protected buffer “undermines the purpose of separation between incompatible land uses.” Staff said the submitted effluent disposal plan identifies soil-testing points inside the buffer but does not demonstrate how treated effluent would disperse beyond those points, leaving uncertainty about risks to groundwater and adjacent residential properties.
Mayor Federer asked why the rezoning was being considered before a memorandum of understanding (MOU) governing the proposed septic system had been finalized. The developer’s representative, introduced as Tom Carey, said the MOU remained outstanding but that the applicant wanted zoning confirmed first to establish whether septic was feasible on the preferred site. Carey said a site-plan amendment and the MOU would follow and suggested a sunset clause could be used to limit the septic allowance in the buffer in the future.
An adjacent homeowner, Richard Buchanan, told commissioners he and other neighbors were told at project outset there would be a 150-foot green-space buffer and that converting part of the buffer to a wastewater treatment area “changes the project dramatically.” Buchanan said the land drains downhill toward his driveway and a nearby creek and that placing leach fields in the buffer raises concerns about seepage, soil saturation and potential downstream impacts on residents and wildlife. He suggested siting the system in front of the building off Claiborne Road as an alternative.
Staff concluded it needs further justification on why the applicant must encroach into the buffer, additional analysis of effluent dispersal and long-term monitoring plans, and clearer soil testing across the site before the item proceeds to a voting meeting.
No vote occurred at the work session; staff asked the applicant to provide additional information and said the items listed in the staff report require revision or further discussion before any decision.
