05/16/2019 BOARD OF HEALTH Minutes

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Town of Mashpee N •,y. 16 Great Neck Road North Mashpee, Massachusetts 02649 BOARD OF HEALTH — PUBLIC SESSION' Mashpee Town Hall —Waquoit Meeting Room Minutes of the Meeting of May 16, 2019 7 Board Members Present: Member Absent: Also Present: Brian Baumgaertel, Chair Glen Harrington, Health Agent Laurel Almquist, Co-Chair Mallory Langler, Clerk Chair Brian Baumgaertel called the meeting to order at 7;01 PM. APPOINTMENTS 7:15—31 Evergreen Circle Michael McGrath of Holmes&McGrath introduced himself for the record. He indicated that a MicroFAST system is being proposed,with a primary and reserve system,full-scale plans for which would be prepared and provided after the meeting. This is a provisional approval use. The system is designed to handle high- strength waste. it was requested that the board approve the revised technology. Glen Harrington commented that this matter was continued from their last meeting to allow the board time to review the monitoring requirements. The Cape Cod Commission has required a discharge limit of 25mg/L for this project; however,this system is not in a Zone 11 or nitrogen sensitive area. There is quite a difference in monitoring for nitrogen sensitive areas, per the DEP. Per the DEP Provisional Approval letter for systems with <2,000 gpd design flow, field testing for turbidity, dissolved 'oxygen, pH and apparent color is required two times per year. No influent sampling is required. At the beginning of this project, the Health Office requested influent sampling from the engineers, but no wastewater analyses were provided to show the strength of the wastewater. A low pH sanitizer is being used. Mr. Harrington recommended quarterly sampling of influent for the first year for pH, ammonia, BOD5 and dissolved oxygen,and effluent sampling to include dissolved oxygen and ammonia for the first year. Mr.Harrington further recommended that,after the first year,monitoring revert back to the DEP requirements and,after three years,the sampling be reduced to field sampling. Mr. McGrath stated that he attended a Buzzards Bay Coalition discussion about onsite systems, and PH is becoming more of an issue. Mr. Harrington agreed that pH on the influent is going to be important in this instance. Chair Baumgaertel asked why this is a provisional use, and Mr. Harrington answered that it is due to the use of the MicroFAST technology. Chair Baumgaertel asked the date of the provision certification for nitrogen reduction, and Mr. Harrington answered July 2015. It was asked whether the system is pressure dose or pressure distribution, and Mr. McGrath answered that it is pressure dose. 1