HomeMy WebLinkAbout2015 Jan 06 - Letter from J.M. O'Reilly & Assoc. to BOHJ.M. OREILLY & ASSOCIATES' INC®
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PROFESSIONAL ENGINEERING, LAND SURVEYING & ENVIRONMENTAL SERVICES �i tv
Site Development • Property Line • Sub visiomd v n urt • Environmental Permitting
January 6, 2015 JAN 0 7 2015 Job # 7030
HEALTH DEPT.
Yarmouth Board of Health
Tanya Daigneault, Chair
Yarmouth Health Department
1146 Route 28
South Yarmouth, MA 02664
RE: Proposed Tight Tank Installation
236 Center Street
Yarmouthport MA
Dear Board Members:
On behalf of our client, Tun Sherry Homes, J.M. O'Reilly & Associates, Inc. hereby requests to meet
with the Yarmouth Board of Health at their regularly scheduled meeting, February 2nd, to ask for approval
to install a tight tank at the above referenced property.
J.M. O'Reilly & Associates, Inc. was hired to complete a site and septic plan showing the removal of the
existing 323 s.f., one bedroom, cottage and construction of a new 574 s.f., one bedroom cottage. The
existing cottage is served by a cesspool which would need to be upgraded as part of the construction
process.
The initial plan was to install a conventional septic system. However, at the time of our soil and
percolation testing high groundwater was established at a depth of 4' below grade (mottling found in test
pit # 2 & #3 — see enclosed Site and Septic Sketch Plan for details). In order to install a new septic system
the grade, on the north side of the cottage, would have to be raised almost 2' or a containment wall would
have to be built in order to meet required separation to groundwater. Along with the grading/containment
wall construction the system would include mechanical components such as alarms & pumps and
installation of the system would be costly (anywhere from $25,000 to $35,000).
The proposed cottage is not considered "new construction" by 310 CMR 15.00 "Title 5" standards (no
increase in flow). Therefore the installation of a tight tank is allowed and the January 2014 revisions to
"Title 5" require only local Board of Health approval for installation.
The installation of a mounded septic system would be very costly and greatly change the character of the
existing property. The proposed cottage is relatively small in size and there will be little water usage
inside the cottage. The proposed cottage does not have a laundry facility and the installation of the
proposed outside shower will help reduce wastewater flows. The tight tank will have an alarm that will go
off when the tank is at 60% capacity so that the homeowner/occupant will have time to schedule pumping
of the system.
We believe that the tight tank will also benefit the environment in this area. The tight tank will eliminate
any onsite discharge of wastewater from the proposed cottage. The area of the proposed cottage is subject
to a high groundwater table and is surrounded by wetlands to the north, south, and west (See Site and
Septic Sketch Plan). Any reduction in effluent discharge onsite will benefit this environmentally sensitive
1573 MAIN STREET, P.O. BOX 1773, BREWSTER, MA 02631 • PHONE: (5o8) 896-66oi • FAX: (508) 896-6602
WWW.JMOREILLYASSOC.COM
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�' � axea. Tight tank installation will also be a much cheaper alternative with estimated installation costs
ranging from$6,000 to$8,000.
Enclosed please find seven(7)copies of the Site and Septic Sketch Plan,Floor Plans for Existing Cottage,
Proposed Cottage Plans,and Plans for Septic System Serving Main Dwelling.
� Very truly yours,
J.M. O'Reilly&Associates,Inc.
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� Keith E.Femandes,P.E.
Civil Engineer
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