HomeMy WebLinkAbout2022-04-26 Application Engineer Summary WSP RANGER ENGINEERING GROlUP, INC'.
L13 Red Roof Lane Suite 203
Sal�emi,NH 03079
Tel: 978-208-1762
www.rangereng.com
March 9, 2022
North Andover Planning Board
120 Main Street
North Andover, MA 0 1845
RE: 198 Dale Street Watershed Special'l Permit
l ear Planning Board Members,,
The following written summary is prepared on behalf of the applicants, Paul and Heather Takesian, in
support of construction of a 2 story addition at 198 Dale Street which is located within the Watershed
Protection District. The addition is within the "Non- Discharge Zoine"i with a small area of grading in the
non-disturb zone. it should be noted that this lot was created in August 19516 which predates the
watershed protection bylaw.
The following items as outlined in the Watershed Special Permit requirements are listed below
(responses to required items are in italic)
1. Encouraging the most appropriate use of land'
Thi's site is zoned residential and the proposed site development items listed above are
appropriate for this parii The current owners have ownedithl's parcel for 6 years and seeking to
make improvements,to the property to further enjoy their home.
2. Preventing overcrowding of land
Thie proposed addition complies with zoning setback requirements from all lot lines. Installation of
a circular drive will make the driveway access the property safer.
3. Conserving the value of land and buildings.
The proposed site development will enhance surrounding building and land values, while being
aesthetically pleasing No trees are to be out as part of thi's project. An effort has been made to
protect surrounding properties by limiting site disturbance.
4. Lessening congestion of traffic
This project will not increase traffic congestion since thi's I"s a single-family dwelling with limited
trips pier day. The now driveway will make access to the property from a roadway with elevated
traffic speed and volume safer by allowing exit from the property without backing into the
roadway.
5. Preventing undue concentration of popu�lation
The property will remain a single-family homei.
6. Providing adequate light and air
There will be no adverse impact to current background air and light levels.
RANGER ENGINEERING GROUP, INC.
13,Red Roo Lane Suite 203
Salem, NF1 03079
Tel: 978-208-1762
www.rangerengcom
7. Reducing the hazards from fire and other danger.
There will be no increase in hazard levels from fire or other dangers.
8. Assisting in the economical provisions of transportation, water, sewerage, s,choolls, parrs, and
other public facilities.
Thi's project will not,impact the above noted public facilities andlor utilities. There will not be a
negative impact to the economics of any public utility.
9. Controlling the use of bodies of water, including watercourses:
This project does not directly abut the Lake and will not have a neigative impact on present uses
of the Lake or tributaries thereto.
10. Reducing the probability of losses resulting from floods:
Thi's property is not located within a designated Flood Plain as shown as the latest FIRM maps.
The proposed construction will utilize drainage mitigation to collect&recharge stormwater runoff
back to the groundwater table. There will be no,increase, of storm water runoff from,this site. There
will be no increase In flooding probability due to the development of the,property.
i
11. Reserving and increasing the amenities of the Town
Thi's project will increase,the amenities of the Town through,an Improvement to,the property
which results in a higher property value and additional tax revenue due to the new construction
assessment
The Planning Board, in reviewing this application, will note,that all threshold requirements for granting the
Special Permit are .net and/or exceeded.
Further written documentation is, provided below (responses to required items are in italics)
I
1. Written certification by a Registered Professional Engineer, or other scientist educated in and
possessing extensive experience in,the science of hydrology and hydrogeology, stating that there
will not be any significant degradation of the quality or quantity or water in or entering L,ake
Co,chichewick.
1 No pesticides, fungicides, chemicals, or non-organic fertilizers will be used In lawn care,or
m ain i tenance, Presently, there are no limitations on the type or quantity of fertilizers.
2) Siltation controls are proposed at the,limit of work during construction and until the site is
stabilized with grass which will protect the lake and surrounding properties from ally
potential runoff impacts.
3) Stormwater mitigation has been provided to account for increases in impervious areas. A
pro posed drainage infl/tration field consisting of concrete dry well structures and crushed
stone has been designed to collect runoff from the proposed addition roof, a portion of'the
e i ting house,roof, and the, new driveway. Stormwater from the driveway is routed to a
xis
deep sump catch basin to provide pre-treatment prior to flowing to,the dry well structure.
The drainage facility is designed to,reduce the post development runoff volume in,the 2, 10,
R A
AiNiGER ENGINEERING, GROUP, INC.
L113 Red Roof Lane Suite 203
Salem, NH 03079
Tel-,978-2 -1762
www.rangereng.com
25., and 100 year storms providing greater itfiltration for groundwater recharge than
presently exists.
4) The existing dwelling IS connected to the municipal sewer system; therefore, there will be
no potential increase in nitrogen levels over the existing background levels at the property.
5) The proposed:infiltration structure will provide runoff volume control in all storms with the
exception of the 10 year storm, where only runoff volume is controlled, which will prevent
increases in downstream flows from having adverse effects on the wetlands, buffer zones,
and streams which are located downgradient from this property
2. Proof that there is no reasonable alternative location outside the Non-Di'sturb�ance and/or Non-
Discharge Buffer Zones, whichever is applicable, for any discharge, structure, or activity,
associated with the proposed use to occur.
The entire lot is within the "Non-discharge,zone�".1 The proposed addition has been located as far
from the wetlands as possible, while respecting the zoning setbacks,
3. Evidence of approval by Mass CEP' of any industrial waste water treatment or disposal system or
any waste water treatment of'systern 15,100,0 GPD capacity.
This item does not apply to this site,
4. Evidence that all on-site operations including, but not limited to, construction, wastewater
disposal, ferti'lizer applications, and septic systems will not create concentrations of nitrogen in the
i
groundwater, greater than,the Federal limit at the down gradient property boundary.
1. Erosion control will be used to protect downgradient areas from siltation in runoff.
2. The dwelling is connected to the municipal sewer system, there i's no on-site wastewater
disposal nor septic systems located on the property.
3. Low nitrogen slow-release fertilizers will be used on the property.
5. Projections of down gradient, concentrations of nitrogen, phosphorus, and other chemicals at
property boundaries and other locations.
The use of stormwater infiltration will provide treatment of runoff from the impervious surfaces
and a deed reistn"ction limiting the use of fertilizers to organic, slow release, low nitrogen and
phosphorus products will insure the downgradient concentrations of these, chemicals will not be
raised.
Based upon the above this engineer certifies,that the proposed addition and driveway construction
will not result in a degradation of water quality leaving the property, will not degrade groundwater,
and,will not degrade water quality entering Lake Cochichewick.
Sincerely, I"OP A
0 _1W
en BENJAMIN 0. 0
OsGooa:).in,
CN
Benjamin Co. Oisggo ILod:,