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Home My WebLink About20170711 Consultant review - Consultant Review - 175 SALEM STREET 6/1/2017 65 Glenn Street 169 Ocean Blvd. Lawrence,MA 01843 I Unit 101, PO Box 249 Hampton, NH 03842 T:978.794.1792 7:603.601.8154 TiECTheEngineeringCorp.com AMW Rebecca Oldham, Staff Planner June 1, 2017 Town of North Andover Planning Department 1600 Osgood Street North Andover, MA 01845 TEC Ref. T0652.09 Re: Peer Review #1 Watershed Special Permit Application 175 Salem Street, North Andover, MA Dear Ms. Oldham: On behalf of the Town of North Andover, TEC, Inc. conducted a technical review of the May 2017 Special Permit Application for the proposed project to be located at 175 Salem Street. Peter and Arlene Devlin `Applicant') submitted the following documents, which TEC reviewed for conformance with Section 4.136"Watershed Protection Division"of the Town of North Andover Zoning Bylaws: Plot Plan of Land, 175 Salem Street, North Andover, MA, prepared by Sullivan Engineering Group, LLC, dated February 13, 2017; • Special Permit-Watershed Permit Application, 175 Salem Street, North Andover, MA, Jack Sullivan, P.E. February 13 2017. prepared by Jry , Upon review of the documents and plans, TEC has compiled the following comments for the Board's consideration: 1. TEC has reviewed the Plot Plan of Land as noted above and agrees with the delineations shown for the Watershed Protection buffer zones including the 100-foot Non-Disturbance Zone, and the note stating that the entire lot is located within the 325-foot Non-Discharge Zone(lot- -created Drior lot_createdDrior to October 24, 1994). — 2. The-pro gaddition driven extension,_and_proposed stormwater infiltration system is located outsidethe 100—foot Non-Disturbance..Zone. 3. The proposed garage addition, driveway extension, and proposed stormwater infiltration system is proposed within the 325-foot Non-Discharge Zone. The sub-surface discharge is a use allowable by Special Permit in accordance with Section 4.136.b.ii(1). The Applicant has performed a test pit omit -a-a-cLc-onfrmed-Lha�Lhe_-Qil-son__tbe- e._ar _..a--andy—y loam.,which.has— a moderate infiltration rate when saturated. Plan I Permit I Design Construct Ms. Rebecca Oldham 175 Salem Street— Peer Review June 1, 2017 Page 2 of 2 4. Section 4.136.4.c.ii(2) of the Town of North Andover tthe C Conservation ning Bon Commission ws states if the edge of all wetland resource areas are to be confirmed y wetland resource area is within four hundredo(nthef elan has been et of any opconfirmedosed l should be by the confirmed that the wetland boundary shown p Conservation Commission. 5. The Alicant should revise the plan to delineate ot ee Zoning d lawit of work in accordance with Section 4.136.4.c.ii(6) of the Town of North And 6. The Applicant proposes to construct a garage addition with a footprint of 576 square the and t to expand the driveway pavement area (untreated) by 250 square ®_2 - additional im ervious areas the t lex stin CO of runoff (to offset the additional 250 square routaaraAe addition and a oses to collect roof r ortion of the existing ell structure. The drywell is foot of drivewayarea , which will b event into a proposed dryw sized to handle the 100-year storm 7. The Plot'Plan should include a roof drain schematic showing how stormwater will be he plot Plan should collected ude from roof downspouts and routed into the pro op sed drywell. Also, t invert elevations of the proposed roof downspouts. 8. TEC recommends that the use of lawn care products on the site be of coalted tar-based pavement rganic or slow- release low nitrogen and low phosphorus fertilizers and the u se sealants is prohibited, as noted on the plan. 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,com" PAX Peter F. Ellison, P.E. Civil Engineer T:\T0652\T0652.09\Docs\Letters\T0652.09_175 Salem Street Peer Review#1_5-25-2017.docx REC Sullivan Engineering Group, LLC Civil Engineers&Land Development Consultants June 27, 2017 Rebecca Oldham, Staff Planner Town of North Andover Planning Department 1600 Osgood Street North Andover, MA 01845 Re: 175 Salem Street, North Andover Watershed Special Permit Application Dear Ms. Oldham; In response to the peer review memorandum dated June 1, 2017 the design plan was updated to address the comments as follows: (TEC comments in regular text, SEG response in italics) 1. TEC has reviewed the Plot Plan of Land as noted above and agrees with h delineations one andshown for the Watershed Protection buffer zones including the 100 foot Non Diste the note stating that the entire lot is located within the 325-foot Non-Discharge Zone (lot created prior to October 24, 1994). OK 2. The proposed garage addition, driveway extension, and proposed stormwater infiltration system is located outside the 100-foot Non-Disturbance Zone. OK 3. The proposed garage addition, driveway extension, and proposed discharge infiltration n system allowable by proposed within the 325-foot Non-Discharge Zone.The sub-surfacelicadi has eras a use a test pit Special Permit in accordance with Sectionhe site are a(sandyhloamp which has a moderate infiltration onsite and confirmed that the soils on t rate when saturated. OK 4. Section 4.136.4.c.ii(2) of the Town of North Andover Zoning Bylaws mm'ssi es haf the edge of wetland t the edge of all wetland resource areas are to be confirmed by the Conservation Co resource area is within four hundred (400) feet of any proposed activity. abon e confiComrm sc ion. that the wetland boundary shown on the plan has been confirmed by the Const The wetland line and associated protective loo foot buffer was reviewed and approved by the North Andover Conservation Agent as shown on the plan. P.O. Box 2004 Woburn,MA 01888 (781) 854-8644 e-mail:jacksu1153@comcast.net 5. The Applicant should revise the plan to delineate the proposed limit of work in accordance with Section 4.136.4.c.ii(6) of the Town of North Andover Zoning Bylaws. The limit of work line is dearly marked and will be established by installation of a staked silt fence prior to any site work 6. The Applicant proposes to construct a garage addition with a footprint of 576 square feet and to expand the driveway pavement area (untreated) by 250 square feet. To mitigate the additional impervious areas, the Applicant proposes to collect roof runoff from the proposed garage addition and a portion of the existing roof runoff(to offset the additional 250 square foot of driveway area), ell structure. The d ell is sized to handle the 100-year sed d � into a proposed ryw which will be routed p p storm event. OK 7. The Plot Plan should include a roof drain schematic, showing how stormwater will be collected from roof downspouts and routed into the proposed drywell. Also, the Plot Plan should include invert elevations of the proposed roof downspouts. The roof drain is clearly marked on the revised plan and invert elevations are shown at all critical design and angle points: 8. 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, as noted on the plan. OK At the Planning Board meeting, one member asked about snow storage area next to the proposed garage and providing some landscaping (i.e mulch berm). The area next to the garage will be either grassed or a porous surface such as crushed stone to allow snow melt to infiltrate into the ground. All the work is outside the 100 foot wetland buffer zone. The applicant aboffne with a work line be andition that the po porous surface,area to the west of the proposed garage addition and the est of the limit I have enclosed a copy of the updated plan, dated lune 27, 2017 for review, comment, and approval at the next Planning Board meeting. Very Trul Yours, 9c sy� AN IN Jack Ili , PE CIL No. 41586 iO�pf �fGIST SIGtavt��'� P.O. Box 2004 Woburn,MA 01888 (781) 854-8644 e-mail:jacksu1153@comcast.net