08/27/2014 ZONING BOARD OF APPEALS Decision

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Charles L. Rowley, PE, PLS Consulting Engineer and Land Surveyor 5 Carver Road Tel:508-295-1881 PO Box 9 Cell:508-295-0545 West Wareham,MA 02576 E-mail: crsr63 Qverizon,net December 10, 2014 Town of Mashpee Board of Appeals Town Hall 16 Great Neck Road North Mashpee, MA 02649 Re: Site Plan Review for Cotuit Solar Trinity Place Attention: Jonathan Furbush, Chairman Dear Chairman Furbush: I have received updated information from the applicant's engineer that is a response to my letters of October 17, 2014 and October 31, 2014. This information is in the form of copies of my letters with responses from Oceanside Septic, Inc., Engineering Division indicating changes either to the plans or to the Stormwater Management Report. Storm Water Management Report The report has been revised to reflect the changes that were asked for in my review letter of October 31 in items 1-6 inclusive. All references to obligations of the Town of Mashpee have been removed. A revision has also been made to the maintenance timelines and certain practices that have to be carried out over the course of the lifetime of the project. I recommend that the Stormwater Management Report dated May 14, 2014, Revised December 1, 2014 be incorporated in its entirety into any approval or decision that the Board of Appeals may grant for the project. Drainage Calculations Drainage calculations have been received and reviewed for a gravel parking area and a paved parking area as requested by the Board at the last public hearing. The calculations have been done for the 2-year, 25-year and 100-year storm events and show that runoff for each of these surfaces can be contained on site. Appropriate adjustments in the method of treatment of surface runoff have been provided including grass lined swales for nitrogen uptake and sediment control and subsurface structures for storage and infiltration of storm water. This methodology would now appear to comply with the requirements of the Zoning By-Law for stormwater management. The applicant still needs to seek variance relief from Section 174-41, Parking Lot Design for a gravel parking lot. Plans The plans have also been revised as of December 10, 2014 to reflect the requested changes and modifications noted in my October 17 and October 31, 2014 letters. Please note, however that the plan does show a gravel parking area to the south of the proposed building. 5