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HomeMy WebLinkAboutConsultant Review - 919 GREAT POND ROAD 8/19/2003 MERRIMACK ENGINEERING SERVICES, INC. PROFESSIONAL ENGINEERS • LAND SURVEYORS • PLANNERS 66 PARK STREET•ANDOVER,MASSACHUSETTS 01 810•TEL(978)475-3555,373-5721 •FAX(978)475-1448•E-MAIL:merreng @aol.com July 25, 2003 a Mr. Justin Woods Town Planner �� Town of North Andover , N Q_Fr'4At�)(���vf,q 1 Planning Department 27 Charles Street North Andover, MA 01845 RE: Watershed Protection District- Special Permit Application 919 Great Pond Road Dear Mr. Woods, We have received the Engineering Review comments prepared by Vanasse Hangen Brustlin Inc. (VHB) relative to the subject project application for Special Permit. The following responses are presented in the order as the comments appear in their letter dated July 15, 2003. 1. SECTION 3 ZONING DISTRICTS AND BOUNDARIES The subject project site is located in the R-2 Zoning District, as indicated on the application for Watershed Special Permit as filed with the North Andover Planning Department(copy of Application attached). See note#2 which was added to the Site Plan. 2. SECTION 4.136 WATERSHED PROTECTION DISTRICT Section 2-Boundaries and Zones The lot was created in 1960, as indicated on the Application form. The project site is beyond the Non-Disturbance Zone and Conservation Zone of the Wetland Resource Area(bordering Vegetated Wetland), to our best knowledge. The nearby wetland area, located downslope of this proposed project, has been delineated in the field and shall be verified by the Conservation Agent soon. No work is proposed within 100' of the delineated area of wetland. The limits of the Conservation, Non-Disturbance, and Non-Discharge Zones have been added to the revised site Improvement Plan. Mr. Justin Woods July 21, 2003 Page 2 Section 3-Uses and Requirements The specific buffer zones, as mentioned above, have been added to the plan. Section 4- Special Permit Requirements 4-cii: See response under Section 3 above for status of revised plan, and wetland delineation. 4-ciii: A letter of certification is provided. There will be no degradation of water quality or the quantity of surface run off from their site, as the residential activity proposed will not generate excessive runoff and the proposed groundwater recharge basin will retain and infiltrate the collected runoff. 4-civ: The project is located outside of the Non-Disturbance Zone. In the Non- Discharge Zone, the proposed addition utilizes the existing driveway. 4-cvi: Fertilizers shall be used in minimal concentrations sufficient only to maintain quality grass root nutrient demand, all within established fertilizer application programs. SECTION 7 DIMENSIONAL REQUIREMENTS Section 7.1-Lot Area is established as of 1960, and no further activity requires a variance. Section 7.4-Building Heights The Architectural Plans showing the proposed addition are in compliance with zoning and building regulations. General Comments: 1. A line of siltation fencing shall be set in place where shown on the revised plan and prior to start of any construction activity, so as to establish the limit of work and equipment confinement area. 2. The design for the recharge system has been revised. A system of leaching pits are now proposed, for review and comment. No maintenance should be necessary. 3. See Note#2 response(above). 4. See Note#2 response(above). 5. No soil tests have been conducted. The redesign and revised calculations are conservative in demonstrating that the necessary mitigation and recharge volume will be provided. MERRIMACK ENGINEERING SERVICES,INC. 66 PARK STREET•ANDOVER,MASSACHUSETTS 01810 Mr. Justin Woods July 21, 2003 Page 3 6. The stone lined trench may concentrate the roof run off volume close to the foundation,which may be detrimental should a potential crack develop in the foundation wall of at the footing. There are now proposed gutters on the addition,which will be connected to the roof drain leaching pits, as shown om the revised plan. Please review these responses to VHB's comments and contact me should you have any questions or comments. Very truly yours, MERRIMACK ENGINEERING SERVICES Ro ert C. Daley, P.E. Civil/Project Engineer cd Enclosure cc: Andrew Matses MERRIMACK ENGINEERING SERVICES,INC, 66 PARK STREET•ANDOVER,MASSACHUSETTS 01810 MERRIMACK ENGINEERING SERVICES, INC, PROFESSIONAL ENGINEERS • LAND SURVEYORS • PLANNERS 66 PARK STREET-ANDOVER,MASSACHUSETTS 01810-TEL(978)475-3555,373-5721 -FAX(978)475-1448-E-MAIL:merreng @ool,com July 31, 2003 RE CEIV ED AUG 0 5 2003 Mr. Justin Woods NUR°i'i-I ANDOVER Town Planner fi� NEr� IaYM� N Town of North Andover Planning Department 27 Charles Street North Andover, MA 01845 RE: Watershed Protection District- Special Permit Application 919 Great Pond Road Dear Mr. Woods, We have received the second Engineering Review comments prepared by Vanasse Hangen Brustlin Inc. (VHB)relative to the subject project application for Special Permit. The following responses are presented in the order as the comments appear in their latest letter dated July 30, 2003, where a response is applicable. 1. SECTION 3 ZONING DISTRICTS AND BOUNDARIES The subject project site is located in the R-1 Zoning District, not as indicated on the application for Watershed Special Permit as filed with the North Andover Planning Department. See note#2 on the Site Plan,which has been appropriately revised. 2. SECTION 4.136 WATERSHED PROTECTION DISTRICT Section 2-Boundaries and Zones The lot was actually created in 1963,based on a recorded plan(ENDRD Plan #4707). The project site is beyond the Non-Disturbance Zone and Conservation Zone of the Wetland Resource Area(bordering Vegetated Wetland), to our best knowledge. The nearby wetland area, located downslope of this proposed project, has been delineated in the field and shall be verified by the Conservation Agent soon. No work is proposed within 100' of the delineated area of wetland. The 325 foot Non-Discharge Zone has been corrected on the revised site Improvement Plan. Mr. Justin Woods July 31, 2003 Page 2 Section 3-Uses and Requirements The specific buffer zones have been corrected on the plan. Section 4- Special Permit Requirements 4-cii: See response under Section 3 above for status of revised plan, and wetland delineation. We have contacted the Conservation Commission and have been assured that the wetland flag locations will be confirmed late this week or early next week. 4-ciii: A revised letter of certification is provided. There will be no degradation of water quality or the quantity of surface run off from their site, as the residential activity proposed will not generate excessive runoff and the proposed leaching pit will retain and infiltrate the collected roof runoff. 4-civ: No response required. 4-cvi: Fertilizers shall be used in minimal concentrations sufficient only to maintain quality grass root nutrient demand, all within established fertilizer application programs. SECTION 7 DIMENSIONAL REQUIREMENTS Section 7.1-Lot Area is established as of 1963. The proposed activities do not require a variance. The existing dwelling and the proposed addition are in conformance with R-1 zoning district requirements. Section 7.4- Building Heights The Architectural Plans showing the proposed addition are in compliance with zoning and building regulations. A copy of the plans are included for review. General Comments: 1. No response required. 2. The design for the recharge system has been revised. An H2O rated leaching pit is now proposed. No maintenance should be necessary. Capacity within the pit is 1050+/- gallons (140 cu. Ft.). 3. No response required. 4. No response required. 5. No soil tests have been conducted. The basement of the house is virtually dry, at elevation 137.5+/-. A test pit will be performed, if required by the Planning Board, to verify the water table. nnFOrnnnnr-v Fnirm1FrD1Ni(-'cFrnnrrFC )nir- Mr. Justin Woods July 31, 2003 Page 3 6. The stone lined trench may concentrate the roof run off volume close to the foundation,which may be detrimental should a potential crack develop in the foundation wall of at the footing. There are now proposed gutters on the addition,which will be connected to the roof drain leaching pit, as shown on the revised plan. Please review these responses to VHB's comments and contact me should you have any questions or comments. Very truly yours, MERRIMACK ENGINEERING SERVICES Robert C. Daley, P.E. Civil/Project Engineer cd Enclosure cc: Andrew Matses, ACM Dev. Co. Tim McIntosh, VHB AArnnIAAA(�I/CAI/"`IAICCnIAII�frn\.I�I-[ IAI/� • 'to Th+1 Town of North Andover of �` °p Office of the Planning Department j Community Development and Services Division 27 Charles Street 1SSA`"US�z North Andover,Massachusetts 01845 Planning Director: http•//,,vww.townofiiorthandovt-,r.com P (978) 688-9535 J.Justin Woods jwoodsQtownofnorthandover.corn F (978)688-9542 flax To: ACM Development From: J. Justin Woods Fax: 978-685-2357 Pages: 3,including coversheet 978-557-9104 Phone: Date: July 17:2003 Re: 919 Great Pond Road CC: ❑Urgent Q For Review ❑ Please Comment C1 Please Reply 0 Please Recycle ® Comments: Attached please find the Planning Board's outside engineer's review of your application. The public hearing on this application is scheduled to begin at the Planning Board's regularly scheduled meeting on August 5, 2003. Please note that the Board's posted policy on its meeting schedale states that, "Any revision or comments to plans have to be submitted to the Pjanning Department and Outside Engineer 8 days prior to the continued meeting." It is reconunended that the applicant provide WRITTEN RESPONSES AND PLAN REVISIONS to the issues and comments contained in VHB's review. Copies of any written responses and plan revisions should be submitted directly to the Planning Department with a copy being provided directly to VHB. The deadline for submission of revised plans for the August 5, 2003 meeting is July 28, 2003 at 12:00 noon. A oods THE DOCUMENTS INCLUDED IN THIS TRANSMISSION ARE INTENDED FOR THE RECIPIENT TO WHOM IT IS ADDRESSED. IT MAY BE PRIVILIGED AND CONFIDENTIAL OR PROTECTED AS AN ATTORNEY CLIENT COMMUICATION. IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE NOTIFY(978)688-9535 AND DESTROY THE DOCUMENTS YOU RECEIVED IN ERROR. T 'C1 213AOQHH H1210H d T a :a T co LT i nr TOWN OF NORTH ANDOVER PLANNING BOARD ENGL`F-ER.NG REVIEW OF WATERSHED SPECIAL PERMIT FOR CONFORMANCE WITH THE TOWN OF NORTH ANDOVER ZONING BYLAW AND STANDARD ENGINEERING PRACTICE Site Plan Title: Site Improvements—Watershed Special Permit VHB No.:06716.77 Location: 919 Great Pond Road Owner: Unknown Applicant: ' ACM Development,L.L.C.,200 Sutton Street,North Andover,MA 01845 Applicant's Engineer: Merrimack Engineering Services,66 Park Street,Andover,NIA 01810 Plan Date: June 20,2003 Review Date: July 15,2003 Vanasse Hangen Brustlin,Inc.(VHB)has been retained by the Town of North Andover to provide an engineering review of the Special Permit Submission for the Proposed Site Improvements to 919 Great Pond Road. This review is conducted in accordance with the Town of North Andover Zoning Bylaw,Massachusetts Department of Environmental Protection(DEP)Stormwater Management Policy and standard engineering practice. VHB has received the following dra\vings and docum-crtts for review: o Site Plans(I sheet)dated June 20,2003 • Groundwater Recharge Calculations dated June 20,2003 The following comments note non-conformance with specific sections,constructability issues and qucstionslcomments on the proposed desicm. SECTION 3 ZONING DISTRICTS AND BOUNDARIES The parcel of land is located within the Watershed Protection District of Lake Cochichewick. VHB assurnes that the site is also in the Residence I (R-1)District. The Applicant should verify. SECTION 4.136 WATERSHED PROTECTION DISTRIC Section 2—Boundaries and Zones The year the lot was created is not provided on the plan. The limits of the Conservation,Non-Disturbance and the Non-Discharge Zones are dependent upon the date the lot was created. The plan should show all buffer zones of the Watershed Protection District. Section 3—Uses and Requirements Since the buffer zones are not shown on the plans,VHB could not review(iris section for compliance. Section 4—Special Permit Requirements 4-cii: The Applicant should verify that all the v:Cdand resource areas are sho\vn on the plans and that the resource areas have been confirmed by the Conservation Commission. VHB recommends that the Applicant indicate on the plan the Conservation Zone,the Non-Disturbance and the Non-Discharge Zones for the wetland resource areas. The limits of the zones are listed in Section 4.136.2.Table 2. 4-ciii: VHB recommends that the Applicant submit a document certified by a Professional Engineer,or other scientist educated in and pos,essin-extensive experience in the science o`hydrology and hydrogeology,stating chat there will not be any si`nificant degradation o`the quality or quantity of water in or entering Lake Cochichewick. 1 C\udtcmp\-)tc,,heat•rmeM 4oc Z ' d Zt1S68898LG 83AOGWH HINOW d T Z *Z T CO L T T I C 4-civ: This section requires that the Applicant demonstrate that there is no reasonable alternative location for the improvements outside of the Non-Disturbance andior the Non-nischarge Buffer Zones. VHB recommends that the Applicant provide a statement as to why there are no other reasonable alternatives., 4-cvi: This section requires that evidence be provided that all operations,including but not limited to fertilizer applications,will not create concentrations of nitrogen in the groundwater greater than the Federal limit. VHB recommends that the Applicant provide a statement regarding the use of fertilizers on the site. VHB would also like to note that the use of any lawn care or garden product (fertilizer,pesticide,herbicide)that may contribute to the dco adation of the public water supply as well as the use of lawn care or garden products that are not organic is strictly prohibited. SECTION 7 DIMENSIONAL REQUiRENIENTS Section 7.1-Lot Area Based on the assumption that this lot is within the R-1 district,the parcel does not meet the minimum lot area requirement as shown in Table 2 of the North Andover Zoning Bylaws. As this is an existing lot,this may be a moot point. Section 7.4—Building Heights Architectural plans tivere not included in this submission. VHB could not review this section for compliance. VHB assumes that the proposed addition meets the Town's building height requirement. General Comments: 1. The plans have a note that indicates erosion control measures. It is not clear what erosion control measures are proposed. VHB recommends an erosion control detail be provided. 2. Have any future maintenance procedures been considered for the retention pond? As with many retention ponds,the overflow will probably clog with debris. How will the retention pond be maintained? 3. Although the Applicant's calculation indicates that the retention pond exceeds the required recharge volume,the construction and maintenance of this shallow pond maybe difficult. The Applicant should consider increasing the depth to 6"either by raising the elevation of the berm or by lowing the weir elevation. 4. The rip-rap overflow Wier is shown to be discharging to an"existing Swale"on the abutting property. The existing swale is not shown on the plans. The Applicant should verify this will not flood the adjacent property. 5. Soil test information or data was not submitted. Were soil tests(percolation test and high water cable test) performed to verify that the soil type is in fact"Group LB"? 6. As there are no gutters on the existing or proposed buildings,the Applicant may wish to consider a stone lined trench along the dripline of roof. It is recommended that the applicant provide«'RITTEN RESPOtiSES to the issues and comments contained herein. RevieHed by: Date: _ �_ J U Tracie Lenhardt Engineer—Highway and Municipal Engincering Checked by: Date: Timothy wlclntosh,P.E. Project Ivtanager—Highway and N-funicipal Engineering 2 C\;ad�a-nF'.�•-ter snedl-re•ic".dw- E 'd N3AOQWd H121014 d12 taI EO LT Inr NORTH o`�,4EO ,'6.gti0 Town of North Andover =tg1'. ` ° Office of the Planning Department Community Development and Services Division ACHUSEt�y 27 Charles Street North Andover,Massachusetts 01845 Planning Director: http•//www.townofnorthandover.com P (978)688-9535 J.Justin Woods jwoods @townofnorthandover.com F (978) 688-9542 fbx To: ACM Development From: J. Justin Woods Fax: 978-685-2357 Pages: 3,including coversheet Phone: 978-557-9104 Date: July 30,2003 Re: 919 Great Pond Road CC: VHB 2nd Review ❑ Urgent Q For Review ❑ Please Comment Q Please Reply Q Please Recycle • Comments: Attached please find the Planning Board's outside engineer's second review of your application. The public hearing on this application is scheduled to begin at the Planning Board's regularly scheduled meeting on August 5, 2003. It is recommended that the applicant be prepared to address outstanding issues in this report. It is further recommended that the applicant prepare WRITTEN RESPONSES AND PLAN REVISIONS to the issues and comments contained in VHB's second review in anticipation of the hearing being continued to August 19, 2003. The deadline for submission of revised plans for the August 19,2003 meeting is August 11, 2003 at 12:00 noon. Seerely,J THE DOCUMENTS INCLUDED IN THIS TRANSMISSION ARE INTENDED FOR THE RECIPIENT TO WHOM IT IS ADDREESED. IT MAY BE PRIVILIGED AND CONFIDENTIAL OR PROTECTED AS AN ATTORNEY CLIENT COMMUICATION. IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE NOTIFY(978)688-9535 AND DESTROY THE DOCUMENTS YOU RECEIVED IN ERROR. TOWN OF NORTH ANDOVER PLANNING BOARD ENGINEERING REVIEW OF WATERSHED SPECIAL PERMIT FOR CONFORMANCE WITH THE TOWN OF NORTH ANDOVER ZONING BYLAW AND STANDARD ENGINEERING PRACTICE Site Plan Title: Site Improvements—Watershed Special Permit VHB No.: 06716.77 Location: 919 Great Pond Road Owner: Unknown Applicant: ACM Development,L.L.C.,200 Sutton Street,North Andover,MA 01845 Applicant's Engineer: Merrimack Engineering Services,66 Park Street,Andover,MA 01810 Plan Date: June 20,2003 Review Date: July 15,2003 Revised Plan Date: July 25,2003 Review Date: July 30,2003 Vanasse Hangen Brustlin,Inc.(VHB)has been retained by the Town of North Andover to provided a second engineering review of the Special Permit Submission for the Proposed Site Improvements to 919 Great Pond Road. This review is conducted in accordance with the Town of North Andover Zoning Bylaw,Massachusetts Department of Environmental Protection(DEP)Stormwater Management Policy and standard engineering practice. VHB has received the following drawings and documents for review: • Transmittal letter date July 25,2003 • Site Plans(1 sheet)dated June 20,2003—revised July 25,2003 • Letter of certification dated July 25,2003 • Response letter dated July 25,2003 In General the Applicant's Engineer has addressed several of the comments from our previous letter;however,a few items still need to be addressed. The responses listed below follow the general outline of VHB's July 15,2003 Site Plan review letter. For clarity,VHB's original comment is shown followed by our second comment shown in bold. SECTION 3 ZONING DISTRICTS AND BOUNDARIES The parcel of land is located within the Watershed Protection District of Lake Cochichewick. VHB assumes that the site is also in the Residence 1 (R-1)District. The Applicant should verify. The applicant has responded that the parcel is in the R-2 district,and that has been indicated on the application for Watershed Special permit as attached. The Watershed permit was not found in the package sent to VHB. Further,from the zoning map it appears the lot is located in zone R-1. The applicant should confirm the zoning district and forward the application to VHB. Given the different lot requirements between zone R-1 and R-2,our concern is that the lot may be non-conforming if it is within zone R-1. SECTION 4.136 WATERSHED PROTECTION DISTRIC Section 2—Boundaries and Zones The year the lot was created is not provided on the plan. The limits of the Conservation,Non-Disturbance and the Non-Discharge Zones are dependent upon the date the lot was created. The plan should show all buffer zones of the Watershed Protection District. The response letter indicates that the lot was created in 1960 while the plan indicates the lot was created in 1964. The date should be consistent. Also the Non-Discharge Zone appears to have been incorrectly labeled on the plan. 1 TA0671677\does\reports\%eater shedl-revie%c rev]aloe Section 3—Uses and Requirements Since the buffer zones are not shown on the plans,VHB could not review this section for compliance. Since the applicant will be adding impervious area in the Non-Discharge Zone and discharging to both the surface and subsurface,the special permit is required. The Applicant's engineer should show calculations that the proposed additional area and recharge system have been sized appropriately. To accomplish this,the Applicant's engineer should provide runoff and infiltration calculations. VHB recognizes that the scope of this project is very limited,however it is standard practice to demonstrate that the proposed method of infiltration will work. Section 4—Special Permit Requirements 4-cii: The Applicant should verify that all the wetland resource areas are shown on the plans and that the resource areas have been confirmed by the Conservation Commission. VHB recommends that the Applicant indicate on the plan the Conservation"Zone,the Non-Disturbance and the Non-Discharge Zones for the wetland resource areas. The limits of the zones are listed in Section 4.136.2,Table 2. This has been addressed by the applicant,and will be confirmed by the Conservation Commission. 4-viii: VHB recommends that the Applicant submit a document certified by a 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 of water in or entering Lake Cochichewick. The Applicant's engineer has provided a certification that addresses the downstream wetland within the Lake Cochichewick watershed. VHB recommends that the Applicant's engineer revise the certification to address the waters of Lake Cochichewick directly. 4-civ: This section requires that the Applicant demonstrate that there is no reasonable alternative location for the improvements outside of the Non-Disturbance and/or the Non-Discharge Buffer Zones. VHB recommends that the Applicant provide a statement as to why there are no other reasonable alternatives. As the entire lot is located within the non-discharge zone,there does not appear to be a reasonable alternative. 4-evi: This section requires that evidence be provided that all operations,including but not limited to fertilizer applications,will not create concentrations of nitrogen in the groundwater greater than the Federal limit. VHB recommends that the Applicant provide a statement regarding the use of Fertilizers on the site. VHB would also like to note that the use of any lawn care or garden product (fertilizer,pesticide,herbicide)that may contribute to the degradation of the public water supply as well as the use of lawn care or garden products that are not organic is strictly prohibited. The use of fertilizer is limited by the zoning regulations. The Applicant should review the limitations expressed in the regulations. SECTION 7 DIMENSIONAL REQUIREMENTS Section 7.1-Lot Area Based on the assumption that this lot is within the R-I district,the parcel does not meet the minimum lot area requirement as shown in Table 2 of the North Andover Zoning Bylaws. As this is an existing lot,this may be a moot point. VHB has requested that the applicant confirm which zoning district the property is in. If the property is in the R-1 district,it may be subject to the requirements of section 9.1. 2 '1:\0671677\does\reports\wa1er shedl-review rev Um Section 7.4—Building Heights Architectural plans were not included in this submission. VHB could not review this section for compliance. VHB assumes that the proposed addition meets the Town's building height requirement. Architectural plans were not submitted. VHB could not review this section for compliance. General Comments: 1. The plans have a note that indicates erosion control measures. It is not clear what erosion control measures are proposed. VHB recommends an erosion control detail be provided. This comment has been addressed. 2. Have any future maintenance procedures been considered for the retention pond? As with many retention ponds,the overflow will probably clog with debris. How will the retention pond be maintained? The Applicant's engineer has changed the method of infiltration. The proposed pit system should be routinely inspected and cleaned. An operation and maintenance schedule should be submitted to insure that debris from the roof is removed from the pit. Given the location of the pit adjacent to the proposed driveway,the proposed pit should specify an H-20 slab/cover to prevent injury and avoid damage to the system. 3. Although the Applicant's calculation indicates that the retention pond exceeds the required recharge volume,the construction and maintenance of this shallow pond maybe difficult. The Applicant should consider increasing the depth to 6"either by raising the elevation of the berm or by lowing the weir elevation. This comment has been addressed. 4. The rip-rap overflow weir is shown to be discharging to an"existing swale"on the abutting property. The existing swale is not shown on the plans. The Applicant should verify this will not flood the adjacent property. This comment has been addressed. 5. Soil test information or data was not submitted. Were soil tests(percolation test and high water table test) performed to verify that the soil type is in fact"Group B"? Soil tests are necessary to show compliance with BMPs as required. 6. As there arc no gutters on the existing or proposed buildings,the Applicant may wish to consider a stone lined trench along the dripline of roof. This comment has been addressed. It is recommended that the applicant provide WRITTEN RESPONSES to the issues and comments contained herein. Reviewed by: �t`l lv Wit` ~ Date: Tracie Lenhardt Project Engineer—Highway and Municipal Engineering Checked bye -;1� 1( �i tt ��V�l��'i jsl Date: Timothy B.McIntosh,P.E. Project Manager—Highway and Municipal Engineering 3 TAD671677\does\reports\weter shedl-review rev l.doc TOWN OF NORTH ANDOVER PLANNING BOARD ENGINEERING REVIEW OF WATERSHED SPECIAL PERMIT FOR CONFORMANCE WITH THE TOWN OF NORTH ANDOVER ZONING BYLAW AND STANDARD ENGINEERING PRACTICE Site Plan Title: Site Improvements—Watershed Special Permit VHB No.: 06716.77 Location: 919 Great Pond Road Owner: Unknown Applicant: ' ACM Development,L.L.C.,200 Sutton Street,North Andover,MA 01845 Applicant's Engineer: Merrimack Engineering Services,66 Park Street,Andover,MA 01810 Plan Date: June 20,2003 Review Date: July 15,2003 Vanasse Hangen Brustlin,Inc.(VHB)has been retained by the Town of North Andover to provide an engineering review of the Special Permit Submission for the Proposed Site Improvements to 919 Great Pond Road. This review is conducted in accordance with the Town of North Andover Zoning Bylaw,Massachusetts Department of Environmental Protection(DEP)Stormwater Management Policy and standard engineering practice. VHB has received the following drawings and documents for review: • Site Plans(I sheet)dated June 20,2003 • Groundwater Recharge Calculations dated June 20,2003 The following comments note non-conformance with specific sections,constructability issues and questions/comments on the proposed design. SECTION 3 ZONING DISTRICTS AND BOUNDARIES The parcel of land is located within the Watershed Protection District of Lake Cochichewick. VHB assumes that the site is also in the Residence 1 (R-1)District. The Applicant should verify. SECTION 4.136 WATERSHED PROTECTION DISTRIC Section 2—Boundaries and Zones The year the lot was created is not provided on the plan. The limits of the Conservation,Non-Disturbance and the Non-Discharge Zones are dependent upon the date the lot was created. The plan should show all buffer zones of the Watershed Protection District. Section 3—Uses and Requirements Since the buffer zones are not shown on the plans,VHB could not review this section for compliance. Section 4—Special Permit Requirements 4-cii: The Applicant should verify that all the wetland resource areas are shown on the plans and that the resource areas have been confirmed by the Conservation Commission. VHB recommends that the Applicant indicate on the plan the Conservation Zone,the Non-Disturbance and the Non-Discharge Zones for the wetland resource areas. The limits of the zones are listed in Section 4.136.2,Table 2. 4-ciii: VHB recommends that the Applicant submit a document certified by a 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 of water in or entering Lake Cochichewick. 1 CAcadtemp\water shedl-review.doc 4-civ: This section requires that the Applicant demonstrate that there is no reasonable alternative location for the improvements outside of the Non-Disturbance and/or the Non-T)ischarge Buffer Zones. VHB recommends that the Applicant provide a statement as to why there are no other reasonable alternatives. 4-evi: This section requires that evidence be provided that all operations,including but not limited to fertilizer applications,will not create concentrations of nitrogen in the groundwater greater than the Federal limit. VHB recommends that the Applicant provide a statement regarding the use of fertilizers on the site. VHB would also like to note that the use of any lawn care or garden product (fertilizer,pesticide,herbicide)that may contribute to the degradation of the public water supply as well as the use of lawn care or garden products that are not organic is strictly prohibited. SECTION 7 DIMENSIONAL REQUIREMENTS Section 7.1-Lot Area Based on the assumption that this lot is within the R-1 district,the parcel does not meet the minimum lot area requirement as shown in Table 2 of the North Andover Zoning Bylaws. As this is an existing lot,this may be a moot point. Section 7.4—Building Heights Architectural plans were not included in this submission. VHB could not review this section for compliance. VHB assumes that the proposed addition meets the Town's building height requirement. General Comments: 1. The plans have a note that indicates erosion control measures. It is not clear what erosion control measures are proposed. VHB recommends an erosion control detail be provided. 2. Have any future maintenance procedures been considered for the retention pond? As with many retention ponds,the overflow will probably clog with debris. How will the retention pond be maintained? 3. Although the Applicant's calculation indicates that the retention pond exceeds the required recharge volume,the construction and maintenance of this shallow pond maybe difficult. The Applicant should consider increasing the depth to 6"either by raising the elevation of the berm or by lowing the weir elevation. 4. The rip-rap overflow wier is shown to be discharging to an"existing Swale"on the abutting property. The existing swale is not shown on the plans. The Applicant should verify this will not flood the adjacent property. 5. Soil test information or data was not submitted. Were soil tests(percolation test and high water table test) performed to verify that the soil type is in fact"Group B"? 6. As there are no gutters on the existing or proposed buildings,the Applicant may wish to consider a stone lined trench along the dripline of roof. It is recommended that the applicant provide WRITTEN RESPONSES to the issues and comments contained herein. PA n Reviewed by: JaL)W Date: Tracie Lenhardt Engineer—Highway and Municipal Engineering Checked by: -2�� .//?/ Date: -7— ©7j Timothy EVMcintosh,P.E. Project Manager--Highway and Municipal Engineering 2 C:\cadtemp\water shell-review.do Town of North Andover Office of the Planning Department Community Development and Services Division 27 Charles Street CH 5 North Andover,Massachusetts 01845 Planning Director: httl2://www.townofnorthandover.com P (978) 688-9535 J.Justin Woods jwoods@townofnorthandover.com F (978) 688-9542 -IV-19 flax To: ACM Development From: J. Justin Woods Fax: 978-685-2357 Pages: 3,including coversheet Phone: 978-557-9104 Date: July 17,2003 Re: 919 Great Pond Road CC: ❑ Urgent 0 For Review ❑ Please Comment 0 Please Reply 0 Please Recycle 0 Comments: Attached please find the Planning Board's outside engineer's review of your application. The public hearing on this application is scheduled to begin at the Planning Board's regularly scheduled meeting on August 5, 2003. Please note that the Board's posted policy on its meeting schedule states that, "Any revision or comments to plans have to be submitted to the Planning Department and Outside Engineer 8 days prior to the continued meeting." It is recommended that the applicant provide WRITTEN RESPONSES AND PLAN REVISIONS to the issues and comments contained in VHB's review. Copies of any written responses and plan revisions should be submitted directly to the Planning Department with a copy being provided directly to VHB. The deadline for submission of revised plans for the August 5, 2003 meeting is July 28, 2003 at 12:00 noon. Si c y c tin Woods THE DOCUMENTS INCLUDED IN THIS TRANSMISSION ARE INTENDED FOR THE RECIPIENT TO WHOM IT IS ADDREESED. IT MAY BE PRIVILIGED AND CONFIDENTIAL OR PROTECTED AS AN ATTORNEY CLIENT COMMUICATION. IF YOU ARE NOT THE INTENDED RECIPIENT, PLEASE NOTIFY(978)688-9535 AND DESTROY THE DOCUMENTS YOU RECEIVED IN ERROR.