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HomeMy WebLinkAbout2017-06-06 Peer Review 1 Sullivan Engineering Group, LLC Civil Engineers&Land Development Consultants November 6,2017 Town of North Andover Fire Department Re: 1665 Great Pond Road, North Andover—Access Compliance Certification To Whom It May Concern: I certify that the site located at 1665 Great Pond Road,North Andover,MA was constructed in compliance with the NFPA-1 regulations(527 CMR 1.0:Massachusetts Comprehensive Fire Safety Code,NFPA-1 2012 Edition, specifically conditions for required access,section 18.2.3.1. The access driveway has been constructed with an unobstructed width of not Iess than 20 feet. The 20 foot unobstructed width consists of pavement and a compacted crushed stone shoulder. Two site photos are attached for reference. If you should have any questions or comments please feel free to contact me. ss Very Trul Y �� N Q. °yc ULUV&N 14 r L) CIyi1. '`� 4� c4 Jo ack)D. Sullivan III,PE Attachment: Site Photos(2) } PO Box 2004 Woburn,MA 01888 (781)854-8644 email:jacksu1153@comcast.net _. ,. r � ,u �� p,. � � �„ � i � � � � �, �• . �_� ,, �. ,, �. .� WTI Boa w � , „. n ;, a.� a �. :;! � o ,�, �,. �,� �� �, ,��, u ,. i . , n r y w ,<„ n �,°_ p� � 1 b ��°Air �. , ,/„ �- �� y ,� J'il tlR��J.r � Y N'` (r i� "�4�hd' �A, �� yy N nl r v, i a � � ., � i. �� � � � � I 4A a �n �� f mi .�, ` �. 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(978) 687-3828 Fax (978) 686-5100 www.andoverconsultants.corn July 27,2018 North Andover Planning Board c/o Jean Enright,Planning Director Town Offices 120 Main Street North Andover, MA 01845 RE: Watershed Special Permit 1665 Great Pond Road Dear Members of the Board: As required by the Watershed Special Permit Notice of Decision, condition number 30,our office has completed an as-built survey of the property for the project referenced above. Andover Consultants, Inc. was not retained to conduct inspections during construction so the attached plan depicts site features that were visible, or accessible from the surface, at the time of the survey only. Based upon a comparison of the original design plan titled"Site Plan 1665 Great Pond Road Road", dated March 28, 2017 and revised through May 25, 2017,prepared for TKZ LLC and the attached plan titled"As-Built Plan 1665 Great Pond Road" dated July 25,2018,prepared for TKZ, LLC and a field inspection conducted on July 19, 2018, it is my opinion that the project was completed in substantial compliance with the approved plan. It should be noted that some site features depicted on the final approved plan which is referenced in the "Notice of Decision Watershed District Special Permit Modification"dated June 8th, 2017, were not built. These site features primarily include a f1,150 sf proposed patio and a 24'xl4' proposed pool. What was actually built more closely resembles the plan approved in the original"Notice of Decision Watershed Special Permit" dated April 5, 2016 which includes a deck and walkway. The following minor differences are noted for your reference: • As described above, the pool and patio were not built, and instead a deck with hot tub was built per original approved plan. • The stone filter strip heading towards Great Pond Road was built wider than what was shown on the approved plans, allowing for additional stormwater capture and recharge. • The generator was moved from the side of the house to the rear along the existing retaining wall. On behalf of TKZ, LLC, we respectfully request that the Board release the performance bond being held for this project. v-ilPl2-�2da:al.send2UlPA1?6 W'S4as[I�tiCo Pimce_IGfi3Ae Civil Engineers o Land Surveyors • Laird Planners X andover J� consultants Inc. Please find attached two full sized and eight reduced sized copies of the as-built plan. If you have any questions concerning this request, or require anything further,please feel free to contact us at your convenience. Sincerely, ANDOVER CONSULTANTS, INC. Dennis A. Griecci, P.E., LEER AP Enclosures Cc: TKZ, LLC P'Alb1 26_%VSP A,&A Qwq�limnr_IR65.d,,, 5/30/2017 Town of North Andover Mail-RE:1665 Great Pond Final Plan Revisions IN '' AN ER Rebecca Oldham <roldham@northandoverma.gov> Massachus is RE: 1665 Great Pond Final Plan Revisions 1 message Peter Ellison <PEllison@theengineeringcorp.com> Fri, May 26, 2017 at 1:27 PM To: Rebecca Oldham <roldham@northandoverma.gov> Rebecca, I reviewed the revised plan and all of TEC's comments have been addressed. Thank you. Have a great Memorial Day Weekend! Peter From: Rebecca Oldham [mailto:i-olrllia:°n@northandoverma.gov] Sent: Friday, May 26, 2017 8:27 AM To: Peter Ellison Subject: Fwd: 1665 Great Pond Final Plan Revisions Pete: Can you please take a look and let me know if your comments have been addressed? --Rebec:ea Rebecca Oldham Staff Planner Planning Departinent Town of North Andover 12o Main Street North Andover,MA 01845 Phone: 978-688-9535 ext. 48301 F+'ax: 978-688-9542 Entail: roldi'tanl@nodhandoverrna.gov Web: northandoverma.gov l l https://mail.goog[e.com/mail/u/0/?ui=2&ik=ab4f3cb798&view=pt&search=inbox&th=15o45cc9a5db178e&situ 1=15c45cc9a5db178e 1/2 5/30/2017 'town of North Andover Mail-RE:1665 Great Pond Final Flan Revisions ---------- Forwarded message ---------- From: Tom Z <tzeke@comcast.net> Date: Fri, May 26, 20V at 6:03 AM Subject: 1665 Great Pond Final Purl Revisions To: Rebecca Oldham <roldham@northandoverma.gov5, jenright@+northandoverma.gov Hi Rebecca and .lean, Attached is the revised plan addressing the final three comments/suggestions from TEC. The wail notes have been added to assure that only the walls on the subject site are removed (unless otherwise arranged with the abutter). The infiltrator trench detail was added. The proposed approximate planting location of the two 10'evergreens has also been added to the plan. Let me know if there is anything else, see you soon. Sincerely, Tom Z. Sent from my iPad All email messages and attached content sent from and to this email account are public records unless qualified as an exemption under the Massachusetts Public Records Law. Visit us online at www.northandoverma.gov. https://mall.gongle.com/mail/u/O/?ui=2&ik=ab4f3eb798&view=pt&search=inbox&th=15cA5ce9a5dbl78e&siml=l5cA5cc9a5dbl78e 212 S.B-(FND.) ZJ ON--DISCHARGE BUFFER ZONE(325' FOR REGISTRY USE ONLY to R ANNUAL MEAN HIGH WATER ARKRK OF LAKE COCHICHLWICX} NON-DISCHARGE BUFFER ZDI2� ���~ /`;gyp LEGEND: (325'FROM EDGE OF WETLANDS/RFA'S POND) / �hy�}�,/ "` �" ,a �- - "++"i EMSTIHO CONTOUR E3DSTIN0 SEWER E)aSnHC WATER S.B.(FND.) . i{`f/ /'.'� � - Jc EAS11NO SILT SOCK r • t• /' / ,' aT PROPOSED SILT SOCK PROPOSED FENCE NON-DISTUR004CE BUFFER ZON NORTH ANDOVER x / / (250'FROM EDGE OF WATER) ZONING BOARD LOT A ` ` / Pool NntER DATE OF APPLICATION &—- 29.345_..$.F. T2'CAu4K0 4' rfrPRou¢ YL staes[srRP S�T SOCX 3/4•CRU tz•----� DATE OF HEARING i dd PROPOSED. sow E d[O / 1 POOL z4 z DATE OF APPROVAL 'j C7tAhTTE • ,'PRtDApO p:;i.. ti. 15 10' s" STEPS (tPAP 45 r CHAIRMAN 3/4• CRUSTED STZ STONE FILTEB SAP uar To SCALE El" 5ONG ATu 1 i � RUL NSA 5 nulIG DWELUNG 65 - I PIN(FND.) t WALL W_ l STEA CpKAETE -- TRENCI<ONAF/ f)ry�y z...._Q'........._.J $70A'E PAD WORKOF�� �~ _....�v- M1 ry �.{ ZONE ourm + ;-;..ty-n-: �Y= `;is N TA)ftlC(TIP} �"r v �� t ' .5•' "ST PR,E TREES -�� ~ IX MALL TO BE Y / ' r'yp'71xTt'-`~- TO BE REM02b ---`.- - 0Anf11A RDOOM PROP OdLy TO ItTE ';r;i1Gl'?E APPROX LOCATION CF Z-iQl FOOT IX WML �11 1 `~~ EVERGREEN$TO..REVO1m O � GRAVEL BASE TO REWA04 . I l �'�"'' -- TREES _ a, $ 3/4'TO 1-1/2' $ '-_ -� CRUSHED STONE PIPE(FNO.)� 0'i- I i'-:- •1�Z2� � ` E.C.S.B.(FND.)~ _ BOT"'A OF BED f 1�� lSyol :e Ex WALL To _ --_ TO BE uAT 2x SLOP[ -REM+OYE 21 --F RE310ttiO - _� -u. OF PAHI,RIT ) - ' -PROPOSED F+FM P 6:R FP+OE P1N(FNO.) _ r., _ CRUSHED STONE INFILTRATION BED u83'45'43W -1030.01' - NET To SCALE JCT ND-B io DROP / / moSED 5AT 500E ---------- � - 70NE tPUT a / •�� tzxu• ----- -- --------- — -�- -�=�_ ...... _ _.._._ _ _ autaaD S EXIST. 8-SEWER STOIC SDI T YXIO•fr S7ONE ALTER S S --�.. M-114 RLLOVE 74 Si. BENCH MAT<K OF PASFAIFM STinP W/WEcmm$ Rtv,-ttl6] 17 D� SPIKE IN U.P.125 EXIST.SMHtt -`•'< ' ^,Y`., a ELEV.=119.31 GREAT IM-12-POND ROAD Ro.51 " `'L�'d`•'•`•�k "-x trr tr. INV.-II4.27 M1n~~ PROP PATIO 4 t;R,1t0.BASE - 3/4'TO 7-1/2• MEAN HIGHk-�------ BeBG ­ ANNUAL �"�� DF Rt: aS WATER(EL 113.67) AL PATIO FILTER STRIP AND BANK OF LAKE LAKE COCHICHEWICK R` NOT TO SCALE SITE PLAN GENERAL NOTES, 1665 GREAT POND ROAD 1. THE SITE 15 LOCATED WITHIN THE TOWN OF NORTH R- ZONING DISTRICT NORTH ANDOVER, MASS, ANDOVER'S WATERSHEO PROTECIION OVERLAY DISTRICT PREPARED FOR: TKZ LLC AND ZONE A OF LAKE COCHICHEVICK. ZONING ANALYSIS PATE: MARCH 28 20t7 REV: 4/24/17; 5/4/17; 2. ALL UTILITIES WILL CONNECT TO EXISTING SERVICES FOR REQUIREMENT REWIRED PROVID ,PROVIDED DATE: E7OSTINO DWELLING. UTILITY LOCATIONS ARE FROM SCALE:AREA 87,120 S.F. 29,345 S.F. SCALE: 1'=20' 5/25/17 AS-BUILT PLANS PROVIDED BY NORTH ANDOVER WATER AND$£VIER DEPARTMENT. CONTRACTOR TO VERIFY FRONTAGE 175 FT. 15D FT, LOCATIONS DURING CONSTRUCTION. FRONT SETBACK 30 FT, 91 FT, Dam 3. LOT WAS CREATED PROOR TO OCTOBER 24, 1994. 4. DISTURBED LAWN AREAS SHALL BE REPLACED IN KIND. SIDE SETBACK 30 FL 31 FT, an dovef ffi � y 5. THE USE OF FERTILIZERS AND OTHER LANDSCAPE REAR SETBACK 30 FT. 93 FT. COIN SUI ants '.. CHEMICALS ON THE SITE SHOULD BE LIMITED TO CBA 85,340 S.F. 28,735 S.F: IC1C. ORGANIC, SLOW-RELEASE AND LOW-PHOSPHOROUS PRODUCTS 1 East River Ploce Dennl Iecci Methuen, Moss. 01844 Reg. Prof. Engineer 0 20 40 80 80 Ft. \\TscuEHT\P\12\72-32\DWs;\SaTE-AnWr; 0 Tq 20 Meter 5/25/2017 Town of North Andover Mail-RE:1665 Great Pored Revised Plan oIgNA ' VR Rebecca Oldham <roldham@northandoverma.gov> f�lassacirrus�t� r� RE: 1665 Great Pond Revised Plan Rebecca Oldham <roldham@northandoverma.gov> Thu, May 25, 2017 at 11:05 AM Draft ----------Forwarded message ---------- From: Peter Ellison <PEllison@theengineeririgcorp.corn> Date: Wed, May 24, 2017 at 4:20 PM Subject: RE: 1665 Great fond Revised Plan To: Rebecca Oldham <roldham@northandoverma.gov> Hi Rebecca, I reviewed the latest plan submitted for 1665 Great Pond Road. 0elow are my comments: L A construction detail should be provided for the 2'x10" stone filter strip with check dams. 2. The site plan should identify the location of the two proposed evergreens of minimum 10' height. 3. The site plan has been revised to remove the existing masonry walls at the driveway entrance. TEC recommends that the Applicant remove the existing masonry wall up to the limits of the property line. The Applicant could remove the remainder of the masonry wall if requested by the neighboring property owner. 4. A 2'x10" stone filter strip has been added as an outlet from the crushed stone infiltration bed. This filter strip provides additional treatment and infiltration and directs stormwater overflow away from the existing drop inlet structure and into the Swale on the north side of Great Pond Road. Please feel free to give me a call this week if you have any questions! Thanks, Peter https://mail.google.com/mail/u/0/?ui=2&i k=ab4f3cb798&vi ew=pt&search=i nbox&type=15c4017bb3ac9460&msg=15c402478be91 d 10&dsqt=1&si m l=15c3c1 df55... 1/1 4/26/2017 Town of North Andover Mail-RE:1665 Great Pond Road P�assach�s`�11s ' Rebecca Oldham <roldham@northandoverma.gov> RE: 1665 Great Pond Road 1 message Peter Ellison {PEllison@theengineeringcorp.com> Wed, Apr 26, 2017 at 2:51 PM To: Rebecca Oldham <rold ham @northandoverma.gov> Cc: Mackenzie Sharp <MSharp@theengineeringcorp.com> Hi Rebecca, Below please find TEC's responses to the Applicant's memo dated 4-21-2017. The Applicant has addressed all of TEC's comments. 4. Comment addressed. The Board may wish to have a witness onsite during construction to confirm soil conditions and witness proper installation. 12. The proposed patio filter strip will provide stormwater treatment and infiltration, and provides storage for a 0.8" rainfall event. All excess runoff above 0.€3"will be directed to pervious surfaces for further infiltration which is in line with the intent of the regulations. Thanks, Peter Peter Ellison, PE Civil Engineer dpo' � 976-794-1792 ,1�ry�1 From: Rebecca Oldham [nia Ito:roldham@nortNiandovemia.gov] Sent: Tuesday, April 25, 2017 9:49 AM To: Peter Ellison Subject: Re: 1665 Great Pond Road Attached is the Applicant's response. https://mail.googio.com/mail/u/0/?ui=2&ik=ab4f3cb798&view=pt&search=inbox&type=1 rbab68df39c77ac&th=l5bab9a5fadedO44&siml=15bab9a5faded044 1/3 4/26/2017 Town of North Andover Mail-RE:1665 Great Ponca Road I i --Rebecca. Rebecca Oldham Staff Planner Planning Department Town of North Andover 120 Main Street North Andover,MA o1845 Phone: 078-688-0535 ext. 48301 Fax: 978-688-8542 Email: rs:!dhaiii(��iiorti�an(lovei.•:ria.gov Web: northandoverma.gov On Fri, Apr 21, 2017 at 10:30 AM, Peter Ellison <PEElisori theenpioreer rigcorfr.corri> wrote: Rebecca —attached is the final letter as discussed! From: Peter Ellison Sent: Thursday,April 20, 2017 5:02 PM To: roldham@northandoverma.gov Cc: Mackenzie Sharp Subject: 1665 Great Pond Road Hi Rebecca, Please find attached a DRAFT Peer Review letter for the Watershed Special Permit Application for the project at 1665 Great Pond Road. If you have a chance to read thru it tomorrow and are good with it, we'll send over the final letter. Have a good night! Thanks, Pete Peter Ellison, PE https://mail.google.com/mail/LYOI?Ui=2&ik=ab4f3cb798&view=pt&search=inbox&type=15bab68df39c77ac&th=16babga5fadedO.44&sinil=15babga5fadedO44 213 4/26/2017 Town of North Andover Mail-RE':1665 Great Ponca Road Civil Engineer hd.- L; a�"T'1t4,: haCa�Pa�P,;�'Ihft';�r'I:�F2u"",lad:hlrr 979-794-1792 13 rrm All email messages and attached content sent frorn and to this email account are public records unless qualified as an exemption under the Massachusetts Public records Caw. Visit us online at www.northandoverma.gov. https://mail.google.com/mail/u/O/?ui=2&ik=ab4f3eb798&view=pt&search=inbox&type=15hab68df39c77ac&th=15baab9a5fadedO44&siml=1>bah9a5fadedO44 3/3 TKZ LLC 4 High Street, Suite 201 North Andover, MA 01845 978-852-4002 April 21, 2017 Rebecca Oldham, Staff Planner Town of North Andover, Planning department 120 Main Street North Andover, MA 01845 Re: 1665 Great Pond Road WSP Application Responses to TEC Peer Review#1 (4/20/17) Dear Rebecca. Pursuant to the Peer Review#1, below are the item-by-item responses; 1. Variance application to ZBA was submitted concurrently, and is pending the M4-y,...9., 201Z hearingg,, 2. RDA apli,catian„ta„wConComrr� was submitted concurrently, and is pending the r i126 2017 hearing. 3. Site plan has been revised to consistently label the 50'BVW Offset and 100' BVW Buffer zones 4. No soils testing was completed for this application, since the application intent is to improve existing drainage working with existing site conditions, while minimizing disturbance to the site. Recent work on the site confirms the noted soil conditions. 5. 't . �..._. o..., , , �y ed by.the �.ons!srvatonwCommissionpursuant to current Order of Conditions at the he wetland boundar,,,.,was confirm, .. .. adjacent 1661 Great Pond Road. dded to the plans. 6. Limits of work have been a.. V 8l pi e tleestha have. The two smallbeen n added to the site plan; photos of the compromised health of those two trees are also attached. Moving the infiltration bed north (up-slope) to save these trees would reduce the amount of runoff captured by the infiltration bed (thereby minimizing the improvement to drainage), and moving it south (down-slope) would.re.uq ire additional isturbance,by removal of existing�masonry walls and/or installation of the infiltrator in the "will awa.�from the Driveway drop the ROW shoulderto grading h added at the request of DPW in order ta'dire c y g p he East. By this ecrr $�n�rtce,Applicant will,replace thesewtwo trees with new healthy eyeens of minimum ia' heft 9. The infiitraJ be.d destg-n has been modified pursuant to this comment. 10.This response will serve as the Operation and Maintenance Plan for the trench drain; OMP:The trench drain will be visually inspected no less than twice per year and after rain events exceeding 1/2", and �_.-will be cleaned as required pursuant to each inspection and event in order to maintain designed flow capability. ((?,)Permeable avers are undesirable pas ool patio finish, and ouris ex � � nd the ool/ at► ._.. , ested. �� 1 �hap. er�..added to„the lan arou,,, p that they become functionally r compromised over time with natural organic buildup. If the Board feels it is necessary,we can increase the size of the infiltration trench to 18"wide.The trench as proposed is the same as we have proposed and installed in our three f p ri. ...n ....h e of lawn .P� � Distract. . t ... revious pool installations within the Watershed c editions. 13.These restrictions on the use of lawn care roducts ae inecr crated in the exastin WSP cc 14.A Pool Maintenance and BMP Plan is attached as requested. Please let me know of any other concerns,thanks for the efficient reply. Sincerely, f T m Zahoruiko Gs Glenn Street 169 Ocean Blvd, I.awrr race,h1 C911143 I Unit 101, Per Box 249 Hampton, HIi 03842 The Engi nee l ifig orp.corn ���1'lllllllllrlll Rebecca Oldham, Staff Planner April 20, 2017 Town of North Andover Planning Department 120 Main Street North Andover, MA 01845 TEC Ref. T0652.07 Re: Peer Review #1 Watershed Special Permit Application 1665 Great Pond Road, North Andover, MA Dear Ms. Oldham: On behalf of the Town of North Andover, TEC, Inc. conducted a technical review of the April 11, 2017 Special Permit Application for the project modification located at 1665 Great Pond Road. TKZ, LLC ("Petitioner") submitted the following documents, which TEC reviewed for conformance with Section 4.136"Watershed Protection Division"of the Town of North Andover Zoning Bylaws: • Site Plan, 1665 Great Pond Road, North Andover, MA, prepared by Andover Consultants, Inc., dated March 28, 2017; • Special Permit— Watershed Permit Application, 1665 Great Pond Road, North Andover, MA, prepared by TKZ, LLC, dated April 11, 2017; • Description of Proposed Project, 1665 Great Pond Road, North Andover, MA; Additionally, TEC reviewed the submitted documents in comparison to the Notice of Decision for a previously approved Special Permit for the Watershed Protection District of North Andover dated April 5, 2016. Upon review of the documents and plans, TEC has compiled the following comments for the Board's consideration: 1. The proposed pool is located within the 250-foot Non-Disturbance Zone. The proposed pool is a use allowable by Special Permit in accordance with Section 4.136.3.c.ii(3) of the Town of North Andover Zoning Bylaws only after a variance has been granted by the Zoning Board of Appeals (ZBA). The Petitioner has indicated that a variance is being requested from the ZBA. 2. The Petitioner is proposing to install a new trench drain and 20'x20' crushed stone infiltration bed within the 100'wetland buffer and the entire property is located with the MassDEP Zone A which will require permitting with the Town of North Andover Conservation Commission, The Petitioner has indicated that a Request for Determination of Applicability is being filed. ,/3. The Site Plan should be revised to label the 100'wetland buffer. N 4. The crushed stone infiltration bed and patio filter strip are proposed within the 325-foot Non- Discharge zone. These sub-surface discharges are allowable by Special Permit in accordance Plan I Permit I Design I Construct Ms. Rebecca Oldham 1665 Great Pond Road — Peer Review April 20, 2017 Page 2 of 3 with Section 4.136.b.ii(1). Available GIS information indicates that natural soils onsite consist of fine sandy loam, which is acceptable for infiltration, however, no field collected soil data has been submitted with the application. %/111 5. Section 4.136.4.c.ii(2) of the Town of North Andover Zoning Bylaws states that the edge of all wetland resource areas are to be confirmed by the Conservation Commission if the edge of wetland resource area is within four hundred (400) feet of any proposed activity. It should be confirmed that the wetland boundary shown on the plan has been confirmed by the Conservation Commission. ,/6. The Petitioner should revise the plans to delineate the proposed limits of work in accordance with Section 4.136.4.c.ii(6) of the Town of North Andover Zoning Bylaws. 1/7. The Application requires a 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 of the or quantity of water in or entering Lake Cochichewick in accordance with Section 4.136.4.c.iii. of the Town of North Andover Zoning Bylaws. 8. There are two existing pine trees in the vicinity of the proposed crushed stone infiltration bed that are not shown on the Site Plan. The trees should be added to the Plan and if necessary, the infiltration bed should be redesigned to retain the two trees. Approximately 1,900 square feet of impervious driveway flows to the trench drain and infiltration bed. The infiltration bed is proposed in a —13% slope. The bottom of the infiltration bed should be constructed flat (or sloped at 2% max) to promote infiltration and increase recharge volume. If constructed in this manner, the infiltration bed will be sized to handle a 1" rainfall (160 cubic feet) meeting industry standards. The crushed stone should be placed to match the existing topography. 10.TEC recommends that an Operation and Maintenance Plan be submitted to maintain the dw proposed trench drain. At a minimum, the trench drain should be cleaned twice per year, focused in the early spring and late fall. 11.TEC recommends that silt socks be installed to the east and north around the proposed pool and patio area. 12.The proposed patio is 870 square feet larger than the approved patio in the Notice of Decision dated April 5, 2016. A patio filter strip of crushed stone is proposed around the edge of the patio to mitigate the impervious area. TEC recommends that permeable pavers be used as a patio surface to further reduce runoff volume and increase groundwater recharge. ,v,"i3.TEC recommends that the use of lawn care products on the site be limited to organic or slow- release low nitrogen and low phosphorus fertilizers and the use of coal tar-based pavement sealants is prohibited. ]":Al'Or)!32\1'0652,07\Doc,,3\1,et,tei,s\TO652,07,,.Watei,sl,ied Review 1665 Great Pond.docx MEC Ms. Rebecca Oldham 1665 Great Pond Road — Peer Review April 20, 2017 Page 3 of 3 14.The Petitioner should identify and employ best management practices to protect the watershed from contamination by swimming pool chemicals. Such measures would include proper dechlorination and discharge of pool water when it is drained for maintenance or drawdown prior to large rain storms, storage of chemicals, and spill prevention. Please do not hesitate to contact TEC at (978) 794-1792 if you have any questions regarding our comments. Thank you for your consideration. Sincerely, TEC, Inc. "TheEngineeringCorp.cam" Peter F. Ellison, P.E. Civil Engineer "f'�Vf0652\1'0652,07\Docs\l,.etters\1'0652.07.,-Water-stied Review 1665 Great flond,dou W, f TKZ LLC 4 High Street, Suite 201 North Andover, MA 01845 978-852-4002 Pool Maintenance and BMP Plan 1665 Great Pond Road North Andover, MA 01845 April 21, 2017 Storage of Chemicals Pool chemicals will be stored inside the residence and according to their prescribed storage environments, in order to ensure containment of spills. Draindown and Maintenance Prior to seasonal closure or draining of the pool for maintenance, chlorine levels will be reduced to undetectable levels of<0.1 mg/l, either by: 1) eliminating chlorine usage for approximately ten days to allow chlorine levels to dissipate, or 2) utilizing sodium thiosulphate or other pool dechlorination chemicals approved by DEP for use in watershed areas. Water will only be discharged over the extended lawn areas to the east of the patio and residence, which will allow further filtration and infiltration of the water. Overflow Protection Whenever a severe or 100-year storm event is predicted, the pool water level will be drained, pursuant to the above methods, to a level to permit 7 inches of rain to be collected in the pool Infiltration Trench Maintenance Infiltration trenches will be inspected at the seasonal opening and closing of the pool, and after major storm events per above. Debris will be removed, and any silted or clogged stone will be replaced as needed to maintain the design performance of the trenches. I Fast 16%�Cr 11haoc onsu IN�Its M«thuem, nlmasamhommtts 01844 TcY. (97M)687-382m \ ^ Fax (978) 686-5100 vvnrn/.u"davemcwuwmItmittmxwmm En-gineer's Certification - 165 Great Pond Road 1, Dennis A. Griecci, certify by signing below that the work as depicted on the plan titled "Site Plan—1665 Great Pond Road" dated March 28, 2017 and revised through April 74, 2017, prepared by Andover Consultants, Inc. will not result in the significant degradation of the quality or quantity of water in or entering Lake Cochichewick. JL . Dennis A.Griocci, K8AP.E. #4931O Page 1mf11 0vil0mgimwcrme lmmd Surveyors Iuod Planners a �t � '� � � V N F k� � M1 � y� „ }/ Yt � � �K tt 4 a w.,� � y J5, `r � r y 4 � � ,. 4 ��P. � � t a� Q ag��" �h� ��' ,� + � n ,�� i K, E .. _ w ,; m ' ri w � �, � , � �" �� � �, � � o . ,. w � � .�, f, �d.�,- � a ,. 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J 't sw,'�w, 4 �x i � a� f hr �'r'k I>"✓,✓ a a d nr� �t��'r� I V tYbr x ss�"L y,l k r ys;l J x it�@ NDN-DISCHARGE BUFFER ZONE (325' FOR REGISTRY USE ONLY FROM ANNUAL MEAN HIGH WATER LI0.RK OF LAKE COCIitCNE141CK) NON-DISCHARGE BUFFER ZONE (325'FROM EDGE OF WETLANDS/RFA S POND) / ��• / LEGEND: EXISTING CONTOUR ///',' �� i% /�,• -'---s EXISTING SFIAER ��--� EXISTING WATER ///// ,/ //y�y� Np nra,:�•se,•/un-:,:c�,�., EXISTING SILT SOCK /� _ - , ,� � x•-..-t<=:�_:<".1=-�-.-„��r� PROPOSED SILT SOCK x // '/�/�,•' PROPOSED FENCE NON-DISTURBANCL BUFFER ZOtI NORTH ANDOVER ` / / (256 FROM EDGE OF WATER) ZONING BOARD POOL FILTER LOT A DATE OF APPLICATION / a IIE00? 29.3�$.F. CRUS Sy HED STOf1E SiRB DATE OF HEARING T„ s�T sorx PRPOO 0 1t) 24 f DATE OF APPROVAL CRAI.TE PROPOSEO S `t `. STEPS y ! PATIO F CHAIRMAN � � �• I / i f y 4 •�� 5 1 /� ,/ ;3• } � �� EXISTING r,Ee'raATaR 1 lr, DWELLING 4I -ul�lll RET. e+u,LH an,1 k0'L , 1 � « f / \ '<•. L�-ems Fnr�..z�::...:•1�,:-- ' V .,K / Y YVi LH ••,I.r r� PI SkEA r1M"E,e/ w 1j, /3S - 20' TRJ30$DRA:'J tl c / ry ''o I- - s o1EY R_TD6) -,� of I c soST CRUST" Too'avel E1:IST PR;E TREE TO DE ROVDDS ' CF115HED FL sTD1iE \ a1 1 pi A4 3/'TO LMT a WORK(TIP) Un15FtFD sTRttE PIPE FWD.) .:: �PF ' n Cat fi l`2�l T _- �_ eoTeW C,'z SLOPE ----__ _REUDvE 2r4'-- -. -_____�.. ,'•Pw f-EJD. of PAVEVEN7 _1 t'a KOPOSED lryr P k R FENCE ( ) CRUSHED STONE INFILTRATION 13ED N6345'43"W 1 =1 030.01 Ivor TO sr�cE i+C=- DET _ I OF PAL{YETiT 1 PRC&DSfD 1 SLi 2Q'if R:TET o xx.l.-' _se.C._- CRUSHED -`S �- EXIST. 8"SEWER sTDr1E STRP _.S -5=0.004 ....-5—�-��� �E)'ST. H -� RA!»n 16.1 BENCH MARK _.._ - s...,.. -. P-113'6T GREAT SPIKE Rl N.P.p25 POND ROAD EXIST. SFJH :; ELEV.=119.31 _ RIIA=32O.51 o _ RIV.=114.27 ,x'e - 'r" Ix• PROP PATIO GRAVEL BASE rDL,E ,;ERavos ANNUAL(JEAN HIGH���L -� ---- f ac" — ___ _ _ pgTlO FILTER STRIP WATER(LLBANK 11 LAKE AKE COCHICHEWICK >:aT 70 SCAM AND BANK OF TAKE i}.. SITE PLAN 1665 GREAT POND ROAD rrIJERAT.NOTES: NORTH ANDOVER, MASS. 1, THE SITE IS LOCATED VATHIN THE Tonal OF NORTH R-1 ZONING DISTRICT ANDOVER'S WATERSHED PROTECTION OVERLAP DI$TRfCT ZONING ANALYSIS DATE: FOR: TKZ LLC AND ZONE A OF LAKE COCHICHEWICK. DATE: MARCH 28, 2017: REV: APRIL 24, 2017 2. ALL UTILITIES VVLL CONNECT TO EXISTING SERVICES FOR REQUIREMENT REOUIR£O PROVIDED EXISTING DWELLING. UTJLITY LOCATIONS ARE FROM OT AREA 87,120 S-F, 29,345 S.F. SCALE: 1"=20' AS-BU{LT PLAIDS PR L PROVIDED BY NORTH ANDOVER WATER Qyt>=Of AND SERER DEPARTMENT. CONTRACTOR TO VERIFY FRONTAGE 175 FT. 150 FT. LOCATIONS DURING CONSTRUCTION, FRONT SETBACK 30 FT, 91 FT. �� 3. LOT WAS CREATED PRIOR TO OCTOBER 24, 19914. SIBS SETBACK 30 FT. 31 FIr ( ndover 3 Cart 4. O[STURBEO LAW4 AREAS SHALL BE REPLACED IN.KIND. - `1 L Ha493111 5. THE USE OF FERTILIZERS AND OTHER LANDSCAPE REAR SETBACK 30 FT. 93 FT. COTISUI taints CHEARCALS ON THE SITE SHOULD BE LWTED TO C©A 65,340 S.F. 28.735 S.F. in C. ORGANJC, SLOW-RELEASE AND LOW-PHOSPHOROUS - PRODUCTS. 1 Fast River Place Dennl riecci Methuen, Mass. 01844 Reg. Prof. Engineer 0 20 40 60 80 Ft. \\TSCHEIJT\P\12\12-32\OAC\SITE-A.OAG p 5 10 20 Meter 65 Glenn Street 1,ee' 161 Ocean Blvd. Lawrence,MA 01843 1 UrLt 101, PO Box 249 Hampton', NH 03842 TM T:978.794.1792 T:603,601,8154 EC TheEngirieeringCorpxorn ASM Rebecca Oldham, Staff Planner April 20, 2017 Town of North Andover Planning Department 120 Main Street North Andover, MA 01845 TEC Ref. T0652.07 Re: Peer Review #1 Watershed Special Permit Application 1665 Great Pond Road, North Andover, MA Dear Ms. Oldham: On behalf of the Town of North Andover, TEC, Inc. conducted a technical review of the April 11, 2017 Special Permit Application for the project modification located at 1665 Great Pond Road. TKZ, LLC ("Petitioner") submitted the following documents, which TEC reviewed for conformance with Section 4.136"Watershed Protection Division"of the Town of North Andover Zoning Bylaws: • Site Plan, 1665 Great Pond Road, North Andover, MA, prepared by Andover Consultants, Inc., dated March 28, 2017; ® Special Permit—Watershed Permit Application, 1665 Great Pond Road, North Andover, MA, prepared by TKZ, LLC, dated April 11, 2017; • Description of Proposed Project, 1665 Great Pond Road, North Andover, MA; Additionally, TEC reviewed the submitted documents in comparison to the Notice of Decision for a previously approved Special Permit for the Watershed Protection District of North Andover dated April 5, 2016. Upon review of the documents and plans, TEC has compiled the following comments for the Board's consideration: 1. The proposed pool is located within the 250-foot Non-Disturbance Zone. The proposed pool is a use allowable by Special Permit in accordance with Section 4.136.3.c.ii(3) of the Town of North Andover Zoning Bylaws only after a variance has been granted by the Zoning Board of Appeals (ZBA). The Petitioner has indicated that a variance is being requested from the ZBA. .......... 2. The Petitioner is proposing to install a new trench drain and 20'x2O' crushed stone infiltration beci within the 100'wetiand buffer and the entire property is located with the MassDEP Zone A which will rmittina with the Town of North Andover Conservation Commission. The Petitioner has indicated that a Reqye�st rDetermination ofAppj(q lity is being„ailed 3. The Site Plan should be revised to label the 100'wetland buffer. 4. The crushed stone infiltration b d and fil stripcased within the 325-foot Non- Discha,rM,,,Mq,q,.,, These sub-surface discharges are allowable by Special Permit in accordance Plan I Permit I Design I Construct j Ms. Rebecca Oldham 1665 Great Pond Road — Peer Review April 20, 2017 Page 2 of 3 a► " it °' with Section 4.136.b.ii(1). Available GIS information indicates that natural soils onsite consist of fine sandym loam,Wwhich�s accentable ufor infiltration, however no field collected soil data has beensubmitted with the application. � u 5. Section 4.136.4.c.ii(2) of the Town of North Andover Zoning Bylaws states that the edge of all wetland resource areas are to be confirmed by the Conservation Commission if the edge of wetland resource area is within four hundred (400) feet of any proposed activity. ,It should be confirmed that the wetland boundary_shown on thne plan, has been confirmed—by thoe w Conservation C m omission. 6. The Petitioner should revise the plansto delineatem the proposed limits„of work, ina„ccordance with Section 4.136.4.c.ii(6) of the Town of North Andover Zoning Bylaws. 7. The Application rewires a written certification by a Registered Professional Engineer, or other scie ntist educated in and possessing extensive experience in the science of hdraloymand... hydra,ge,oiegy,,st6,g thatthere will not be any significant degradatioiiMaf the duality of the or quantity of water in or entering Lake _Cochichewick in accordance with Section 4.I36.4.c.iii, of the Town of North Andover Zoning Bylaws, 8. There-are o existm ine trees m the vicmit of the ra ose .,t v..g�n� y p p d crushed stone infiltration bed that are not shown on ati the Site Plan The trees should be added to the Plan and if necessary, . a �. ..� themfrltron bed should be redesigned to retain two trees e m o.., �.� �.� � ,.�. _LI2_ y ,__. 9._ ._... ___ — _ Y _ — . —..w rid �: .ar1P1 9. A tel 1 900 s uare feet of impervious driveway flows to the trench drain and.. infiltration bed. The infiltration bed is_proposed inrma -13% slope. The bottom of the infiltration bed should be constructed flat (or sloped at 2%o maxi to promote infiltration and increas e recharges volume. If constructed in this manner, the infiltration bed u will be sized to handle a 1" the ex' g e t meeting industry standards. The crushed stone should be ?laced to ram a 160 cu is e ..w� matcht istin topography, 10. TEC recommends that an Operation _ _ Maintenance Plan be submitted to maintain the Cal hn peration_and Mai ._�.,—..—....__...�.,_...�.,.�-._...�.._....m_.........._.._..__..._..__._.____.._ prapased trenchwdrain. At a rninmumwthe trenchwdrain should be cleaned twice wper„wyear, focused in the early s�?rin .and late fall. east and north proposed 11. patio area. recommends that silt sacks be installed to the n norh around the pool and ._ ....._ �.,..,.,.�. .,..m.W._ 12. The.proposed patra is 870,square feet.larger than,the o.pproved.wpt%�..i, _ t .itt �e.c,,son datedApril 5, 2016 A patio filter strip of crushed stone rsmproposed around the edge of the patreto r??dlgate the,imperviousoarea M . ....,.. .w.. . .�. p�. � . ,�. , min pWe. ,. .. a TEC recommends that ermeable avers be used as . patio surface to further reduce runoff volume and increase groundwater recharge 13. TEC recommends that the use of lawn care products on the site be limited to organic or slow- release low it,rogen-a""n--d low phosphorus fertilizers and the use of coal tar based pavement sealants is rohibited T:\T0652\T0652.07\Docs\Letters\T0652.07_Watershed Review 1665 Great Pond.docx T Ms. Rebecca Oldham 1665 Great Pond Road — Peer Review April 20, 2017 Page 3 of 3 14. The Petitioner should identify and employ best management practices to protect the watershed from contamination by swimming pool chemicals. Such measures would include proper clechlorination and discharge of pool water when it is drained for maintenance or drawdown prior to large rain storms, storage of chemicals, and spill prevention. Please do not hesitate to contact TEC at (978) 794-1792 if you have any questions regarding our comments. Thank you for your consideration. Sincerely, TEC, Inc. TheFnqineetingCoro.con" Peter F. Ellison, P.E. Civil Engineer T:\T0652\T0652.07\Docs\Letters\T0652,07—Watershed Review 1665 Great Pond.docx IMAL L0076 AURY