2021-06-07-CONCOM-min - Laserfiche WebLink

Browse Search

Applicant: Town of Lexington Engineering Property Owner: 95 Hayden LLC, c/o Hobbs Brook Management, LLC Project: wastewater pump station upgrades Documentation Submitted.- - ubmitted:— "Existing Conditions and Demolition Plan" Drawing C-5, "Pump Station Site Layout Plan and Profile Hayden Avenue" C-6, "Hayden Ave Pump Station Existing Conditions and Demolition and Modifications Plan" C-8, "Erosion Control Notes and Details" C-10; Prepared for: Town of Lexington DPW; Prepared by: Wright-Pierce; Stamped and signed by: Kevin M. Olson, PE Civil No. 36482; Date: 5/21/2021; — "Notice of Intent Application" and attachments; Prepared by: Wetlands & Land Management, Inc.; Prepared for: Town of Lexington Engineering; Date: May 2021; Date Notice of Intent signed: 5/14/2021; — "Hayden Avenue Pump Station Site Layout Plan and Profile"; Drawing C-6; Prepared by: Wright-Pierce; Date: 5/21/2021; Mr. William Manuell, Wetlands and Land Management, Inc., and Mr. Marc Moccio and Mr. Derek Costa, Wright-Pierce (civil engineers), presented before the Commission. Request to add various conditions regarding stockpiling being tarped at end of work day and additional erosion controls around the perimeter of the stockpile area. Very tight work area. Questions and Comments from the Commission: — How do you plan to control and/or eliminate the Japanese knotweed? — Will you be using a biodegradable blanket on the steep slopes? — What is in the existing control box? Concerned about an oil release. Responses from the Representatives: — The work should begin around mid July to mid August, however the most realistic start date is Winter or Spring 2022. — The Japanese knotweed can run 4-5 feet deep and can look into excavating that far down to control the spread of the invasive species. — Any slope steeper than a 3:1 ratio will have an erosion control blanket in place. — Will be re-foaming and seeding almost everything within the erosion control. — The project team believes the control box contains electrical connections and infrastructure. Ms. Jamie O'Connell, Cambridge Water Department, was in attendance to ask the project team questions and ensure the pump station meets drinking water regulations as the tributary next to the pump station helps feed the Hobbs Brook Reservoir, and a portion of the project is within an area designated as an Outstanding Resource Water. Ms. O'Connell asked what the power source for the generator will be and if any liquid fuel will be stored, and Mr. Moccio responded that the power source is natural gas and no liquid fuel will be stored. Ms. O'Connell asked if there is an alarm station in the pump room and Mr. Moccio responded yes and that they are in all the stations in town.