HomeMy WebLinkAboutCorrespondence - 566 MAIN STREET 11/4/2013 _
DEVEUKUS ZREKN INC.
Land Planning.Civil Engineering
Landscape Architectrure
November 4,2013
Judy Tymon,Town Planner
North Andover Planning Board
160U Osgood Street
North Andover,MAOl845
Ku: StonnvrmterRev/ew
School Department Building,566 Main Street
-
Dear Ms.7younu and Members nfBoard:
On behalf of our Client,Kang Associates,Inc.,we are pleased to provide response comments to
the review letter prepared by Eggleston Environmental,dated October 30,2013,regarding the
above referenced site.
The items listed |nthe review letter are re-typed below (u plain text. Our responses tuthe
comments are typed in italics.
l. In accordance with the Site Plan Review requirements,the proposed plan will not
increase either the rate or volume of runoff from the site, and the piped connection to
the drain io Osgood Street will eliminate flow from the site onto the street surface
Agreed
2. Conveyance of the pavement runoff through the grassed swale will also provide some
degree of water quality treatment o[the flow discharged from the project site. ldo
recommend the addition ofu deep sump catcbbunionr other means oƒpotrea¢ingthe
flow upgradient of the plunge pool,however, in order to minimize the deposition of
sediment within the ywu|e and the ongoing maintenance required.
The plans are revised*m include odeep sump catch basin at the lowurtpuintofthe parking. Flow
fi-um the catch basin is piped to the beginning mrthe grassed swmle with o flared end section,
having urbrnapoutlet. The originally proposed stone xwo/ b/therefore n/in/naAad.
3. A means of access to the grassed swale for periodic removal of accumulated
sediments should be provided.b appears that this would best be accomplished from
Osgood Street.
The grassed xwale is proposed withnlatively8entlex/de slopes (5.'Dand can easily 6oaccessed |
fi-mmDxgood Strotformuhr&muncm.
4. An proposed,the bottom of the proposed mvale/bmiu will be approximately two feet
below existing grade. Soil testing should bo conducted tosonfiuu that the cut will not
intercept groundwater.
Soil testing has been performed on the site and ground water was generallyfound to be
approximately 2U'below existing grade. A copy gf the test results are attached.
DoncOimZnuiu Inc.
P.0 Box mo7,pvxu m000 MA 02035 508*73-4114
School Department Building
Responses to Review Letter
November 4,2013
Page 2
5. The depth of the existing sewer service line is not identified,but it should be
confirmed that it is below the proposed grading or will not otherwise interfere with
the construction of the swale.
The existing sewer line is proposed to be demolished and cut and capped.
6. Designated snow storage locations should be shown on the plan.
The plans are revised to show proposed snow storage areas
7. Consideration should be given to using a cistern to capture roof runoff for irrigation
on the site.
A cistern system will be discussed with the client, but given the budget constraints, it may be
dijficult to include it.
8. The Planning Board may want to request cut and fill calculations to assess traffic
impacts during construction.
Given the site topography, the proposed site grading attempts to utilize site cuts and fills to the
extend possible. Additional fill materials may be required to be brought to the site.
9. Other than the proposed haybale line,the plans do not address erosion and sediment
control measures to be employed on the site.I do note that the total area of
disturbance associated with the project will exceed one acre,however,therefore
coverage under EPA's Construction General Permit will be required and the selected
contractor will need to prepare a Stormwater Pollution Prevention Plan outlining
more detailed sediment control measures in accordance with the EPA Permit.The
Planning Board should be provided the opportunity to review the Construction
SWPPP before it is finalized.
Agreed
If you have any questions or need additional information please contact us at 508-473-4114.
Sincerely,
DEVE REIN INC.
r'
Imad A Zrein,P.E '"
cc: Kaffee Kang
Lisa Eggleston