HomeMy WebLinkAboutMiscellaneous - 1423 SALEM STREET 4/30/2018 (71) NOONAN & Mc DOWELL, INC.
25 Bridge Street, Suite 6, Billerica, MA 01821-1023
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Date: March 28, 2002 1i2.
Town of North Andover a
Office of the Health Department
Community Development and Services Division
27 Charles Street
North Andover,MA 01845
RE: Subsurface Sewage Disposal System
Plan Review, 1770/058A
1423 Salem Street
Assessors Map 106A,Lot 26
Dear Members of the Board,
Please be advised that Noonan&McDowell,Inc. has reviewed the plan dated 1/10/02,and revised
2/28/02 by Hancock Engineering Assoc. It is our opinion that the proposed design will meet the
requirements of Title 5 and the North Andover Board of Health `By-Laws"if the following is addressed:
1 -
Convert existing D Box to DMH and provide a riser to surface.
2) Designer should demonstrate that 15' to 3:1 slope can not be achieved prior to proposing an
impervious barrier. Please note that this will require additional topographic information up to the
southerly property line in the area of the leaching facility. If an impervious barrier is needed it
should be concrete or clay.
3) Please provide a note on plan view stating that the outlet pipes from the distribution box shall be set
level for the first two feet. It is not drawn in that manner.
4) Provide buoyancy calculations for pump chamber. 221(8)
5) Revise vent detail to show an elbow up at end to prevent cross flow. 241(1)
6) Provide spot grades on downhill side over leaching area to ensure minimum cover. 240(9)
7) Provide pipe slope in profile for leaching line and pipe from D-B
ox to pump chamber.
Respectfully,
John L.Noonan,P.L.S.-P.E.
F:office/letter/1770-058A
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Land Surveyors Civil Engineers Environmental Planners