Planning commission approves Sonny’s Car Wash site plan amid neighbors’ noise and water concerns

The Rosemount Planning Commission voted unanimously May 27 to approve a site plan review allowing construction of a 4,600-square-foot Sonny’s Car Wash at 2550 140th Street West, subject to five staff conditions and standard engineering and permitting reviews.

The developer and equipment representative told the commission the car wash will use a reclaimed-water system and muffled vacuum enclosures, and that vacuum operation would be limited to business hours. ‘‘It will be less than that with the enclosures,’’ said Michael Geissens, a representative of Sonny’s Enterprises, referring to a company noise measurement. The commission’s approval is final unless appealed to city staff within 10 days.

The decision matters to nearby residents because the site backs to homes along 140th Street West and County Road 42. At a neighborhood meeting May 6 and again during the public hearing, homeowners pressed the applicant about vacuum noise, light spill, stacking and traffic, and wastewater treatment. Commissioners sought technical clarifications from staff and the applicant before voting.

Staff planner Julia (first name provided in the record) told the commission the 1.43-acre parcel is zoned MX2 (Highway Mixed Use) and designated Community Commercial in the comprehensive plan; car washes are a permitted use with performance standards. The submitted site plan shows a single wash bay, equipment and control rooms, and vacuum/parking areas. Staff found the plan met five car-wash performance standards in the city code and recommended approval with five conditions, including compliance with the city engineer’s grading and stormwater requirements and conformance with building-permit reviews.

Key details in the record: - Site area: 1.43 acres; proposed building: 4,600 square feet. - Impervious surface: proposed 53% (maximum allowed in MX2 is 75%). - Parking: 22 stalls shown, 16 with vacuum access; staff and applicant said stacking capacity for the three entry lanes exceeds 20 vehicles. - Landscaping: plan calls for 61 trees (code requires 21) and 243 foundation plantings (code minimum 37); many of the proposed trees are coniferous to provide year-round screening along 140th Street West. - Park dedication cash payment required at building permit: $12,870.

On noise, the applicant provided a company case study showing a vacuum producer reading of about 79 decibels at 50 feet without an enclosure. Geissens and equipment experts said enclosures and variable-frequency drives will reduce real-world levels; company testimony described that ‘‘with the enclosures’’ measured levels are expected to be lower. The applicant stated the nearest residence is about 240 feet from the vacuum equipment and that the vacuum producers will be contained in 8-foot enclosures with doors that remain closed during operations except for maintenance.

On water, the applicant and a technical witness, Chris Fritter, described a reclaimed-water system using hydrocyclones and ozone treatment and sand-oil separators before discharge to the sanitary sewer. The applicant estimated reclaimed-effluent discharge for the express car wash at roughly 5,000 to 15,000 gallons per day; fresh-water use per car was estimated at about 43.6 gallons. The applicant said site pumps and bladder storage will be designed so residential water pressure should not be affected, and that final treatment and inspection requirements will be enforced through the building-permit process and any state inspections triggered by tank size or design.

Several residents testified at the hearing. Maggie Graney, whose property backs to the site, asked whether a berm would be constructed and whether landscaping would provide sufficient opacity to block light and noise entering homes; she also asked when vacuum equipment would be shut off. The applicant replied that vacuums would operate only during hours of operation, which the applicant stated would be 8 a.m. to 8 p.m., and that the team is investigating topo and potential berming with the city engineer; the applicant also agreed to prioritize coniferous plantings along the north (140th Street) side to increase winter screening.

Commissioners asked whether vacuum enclosures could be relocated farther south, away from residences; the applicant said engineers would study whether a rework was possible without compromising required parking. The commission chair requested the applicant consider moving the north vacuum enclosure farther from homes if feasible, and thanked neighbors for attending.

The commission moved to approve the site plan review ‘‘subject to conditions 1 through 5’’ listed in staff materials; the motion was made by Commissioner Bugai and seconded by Commissioner Reid. The motion carried unanimously. Commissioner remarks during the meeting clarified that site-plan approvals are final at the commission level and do not go to City Council unless appealed within the 10-day appeal window.

What happens next: the developer must obtain building permits, finalize engineering and stormwater approvals with the city engineer, secure any required state inspections for tanks or treatment systems, and meet the city’s sign-permit requirements on a later, separate application. The applicant also offered to provide more detailed acoustical and stacking models during permit review if the city or neighbors request them.

If residents wish to challenge the commission’s decision, the record indicates appeals must be filed with city staff within 10 days of the decision.