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Home My WebLink About2018-11-13 MassDEP Correspondence 242-1739 z �I i 1 COMMONWEALTH OF MASSACHUSETTS -.n — EXECUTIVE OFFICE OF ENERGY& ENVIRONMENTAL AFFAIRS DEPARTMENT OF ENVIRONMENTAL PROTECTION NORTHEAST REGIONAL OFFICE 205B LOWELL STREET, WILMINGTON, MA 01887 978-694-3200 E� I CHARLES D.BAKER MATTHEW A,BEATON Governor Secretary i KARYN E.POL[TO MARTIN SUt1SERG ° Lieutenant Governor Commissioner DATE: October 09,20I8 Municipality NORTH ANDOVER (city/town) RE:NOTIFICATION OF WETLANDS PROTECTION ACT FILE NUMBER The Department of Environmental Protection has received a Notice of Intent filed in accordance with the Wetlands Protection Act(M.G.L. c. I3I, §40); Applicant: MESSINA DEVELOPMENT Owner: Address: 277 WASHINGTON STREET Address: i GROVELAND,MA Ot834 LOCUS: REA STREET This project has been assigned the following file 4 :NE 242-1739 A FILE NUMBER ONLY INDICATES THAT THE APPLICATION CONTAINS THE MINIMAL SUBMITTAL REQUIREMENTS AND IS ADMINISTRATIVELY COMPLETE-NOT THAT THE INFORMATION IN THE APPLICATION IS ADEQUATE FOR ISSUANCE OF AN ORDER OF CONDITIONS. Although a file#is being issued,please note the following: These comments are based on the revised Stormwater Report and plan set(12 Sheets)all dated 9-18-2018 that were recently submitted to MassDEP. A narrative should be provided to the NACC and MassDEP demonstrating how the project meets the Riverfront Area performance standards under 310 CMR 10.58(4)(c)-the alternatives analysis, and 10.58(4)(d)-no significant adverse impacts. Although the house lots are not part of this NOI, they must be included in the alternatives analysis, along with the overall RFA alteration amounts proposed. The limit of work on Lot 7 will need to be revised out of the inner riparian zone, as this does not meet 310 CMR 10.58(4)(d)1. Pis clarify what the actual elevation(s)for the floodplain associated with Mosquito Brook is and show it on the plan. The proponent should consider using the HEC-RAS program to model Mosquito Brook to determine the flood elevations(s). It is unclear if work and/or filling within BLSF is proposed. Stormwater Checklist and report should be stamped. Pis provide the calculations for each new outfall in accordance with Stormwater Standard 1, The test pit data for D2 and D4 should be provided to show that ESHGW greater than 2' from the bottom of the infiltration unit. Observation wells should be included on the infiltration unit detail. Based on the TP data, the soils appear to be considered rapid for infiltration and therefore, requires 44% TSS removal prior to discharging into an infiltration unit(Standard 3). Additional TSS charts should be provided to demonstrate compliance with this. How is the trench drain being connected to DMH4? Does the existing Stormwater basin off North Cross Rd have the capacity to handle the additional flow from the outlet? A detail of this This infonnation is available in alternate format.Call Donald M,Gonres,ADA Coordinator at 617-556-1057.TDD#1-866-539-7622 or 1-617-574-6868. http:/iwww.mass.Qov/dep �+ Printed on Recycled Paper MESSINA DEVELOPMENT 277 WASHINGTON STREET GROVELAND,MA 01834 3� r basin and the new outfall should be provided. Has this BMP been maintained? The O&M Plan states Stormceptor units area proposed, This should be revised to include the Contech CDS unit and the manufacturer's specifications for long terra maintenance. E If you have any questions regarding this letter, please contact: PAMELA MERRILL @ (978)-694-3249 E Cc: North Andover Conservation Commission, 1600 Osgood Street Bldg 20, Suite 2-36, North Andover, MA, 01845 E 1 f E 1 I E E This information is available in ahernate fonuat.Call Donald M.Gomes,ADA Coordinator at 617-556-1057,TDD#1-866-539-7622 or 1-617-574-6868. htt ;Iiwww,mass.gov/d e Printed on Recycled Paper i CHRISTIANSEN & SERGI A DIVISION OF THE MORIN CAMERON GROUP PROFESSIONAL ENGINEERS AND LAND SURVEYORS 160 SUMMER STREET, HAVERHILL, MA 01830 tel: 978-373-0310 wwacsi-engr.com fax 978-372-3960 October 17, 2018 Pamela Menill Environmental Analyst MassDEP Northeast Regional Office 205B Lowell Street Wilmington, MA 01887 RE: Improvement of Rea Street Dear Ms. Merrill: We offer the following responses to comments received in a review letter of October 9, 2018 by MassDEP, • An alternative analysis has been provided including the RFA calculations. • The area disturbed on each house lot within the Riverfront Area has been included in the disturbance area. • The limit of work has been revised on Lot 7 to be outside the 100' Inner Riparian • Flood elevations have been added to the plans • There is no filling or altering BLSF proposed for this project, • The Stormwater Report and checklist have been stamped. • Rip Rap sizing calculations have been provided. • D2 and D4 were not test pits. They were Double-ring infiltrometer tests performed to determine the infiltration rate of the parent material. These results are provided in the Soil Analysis section of the Stormwater Report. • Inspection ports have been added to the Infiltration Area Detail • Deep sump and hooded catch basins and Cotech CDS units are proposed prior to the infiltration areas. TSS removal spreadsheets have been provided for the Pretreatment of each infiltration area. • The trench drain has a perforated pipe within the stone and a solid PVC pipe once the stone ends. The PVC pipe connects into DMH 4. • The existing retention basin and contributing areas have been modeled in HydroCAD based on the Definitive Subdivision plans. The rate of runoff downstream of the culverts in Rea Street has been analyzed to show a reduction in rate under the proposed conditions. • A detail of the existing basin has been provided on Sheet 10. • The BMP has not been maintained. The basin will need to be cleaned prior to the new stormwater connection. • The 0 &M has been revised for the Contech Units. Cos A DIVISION OF THE MORIN CAMERON GROUP PROFESSIONAL ENGINEERS AND LAND SURVEYORS 160 SUMMER STREET, HAVERHILL,MA 01830 Sel:978-373-0310 mmosi-enquorn fax 978-372-3960 Very truly yours Stephen Sawyer, P.E.