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331_349 Haydenville Rd_DenialCity of Northampton Department of Public Works STORMW ATER MANAGEMENT PERMIT APPLICATION DECISION Project I Site Name: Zoe Senior Retirement & Linda Manor Addition Project Street or Location I Assessor ID: 331 & 349 Haydenville Rd I Map 06, Parcels 37, 39, 55 Applicant Name: J. Chakalos Investments, LLC Applicant Address/Phone: 52 Overlook Dr, Windsor, CT 06095 I 860-688-8816 Application Submission Date:~1=2~/2~/=20-'-1"'"'1"------------------~-- THE FOLLOWING ACTION BY THE NORTHAMPTON DEPARTMENT OF PUBLIC WORKS HAS BEEN TAKEN ON THIS APPLICATION BASED ON INFORMATION PRESENTED: ___K_ Disapproval of the Stormwater Management Permit Application based on a determination within seven days of the receipt of the application that the application is administratively incomplete (see attached documentation). __ Approval of the Stormwater Management Permit Application. __ Approval of the Stormwater Management Permit Application subject to any conditions, modifications or restrictions required by the Department of Public Works (see below) __ Disapproval of the Stormwater Management Permit Application based upon a determination that the proposed plan, as submitted, does not meet the purposes set forth in the Northampton Stormwater Management. 1z_/r (II Date cc. Planning Board c/o Office of Planning and Development M:\Stonnwater Program\Stonnwater Permits Internal\Pennits _new applications\331 & 349 Haydenville Rd_ Denial.doc Page 1of1 NORTHAMPTON DEPARTMENT OF PUBLIC WORKS NOTICE OF INCOMPLETE APPLICATION STORMWATER MANAGEMENT PERMIT Project I Site Name: Zoe Senior Retirement & Linda Manor Addition Project Street or Location I Assessor ID: 331 & 349 Haydenville Rd I Map 06, Parcels 37, 39, 55 Applicant Name: J. Chakalos Investments. LLC Applicant Address/Phone: 52 Overlook Dr. Windsor. CT 06095 I 860-688-8816 Application Submission Date:_,1=2,,..,/=2""/2=0"-"'1,_,1~----------------------- The Northampton Department of Public Works (DPW) is in receipt of the application for a Stormwater Management Permit for the above referenced project. The application has been found to be incomplete. The timeline for application review and final action by the Northampton DPW will begin once a complete application has been submitted. The application is incomplete for the following reason(s): __ The Stormwater Management Permit Application is not complete and/ or signed: __ The Permit Review and Inspection Fee is not paid. __ The Operation, Maintenance, and Inspection Agreement was not submitted and/ or is not complete. ____x_ The Stormwater Management Plan and Erosion and Sediment Control Plan are not complete. The following information has not been submitted and/ or is not complete: • Documentation must be provided of LID measures that were considered for the proposed project as required in the current MA DEP Checklist for Stormwater Report. • The proposed drainage system for Zoe Senior Retirement is shown in the plans connecting to the existing drainage system at Linda Manor. The applicant has provided separate drainage calculations for Zoe Retirement and for Linda Manor. These calculations do not show overall how the system will function and what the peak flows will be to the existing basin and outfall at Beaver Brook. The applicant must provide drainage calculations that show pre and post construction peak flows for the entire drainage system for the 1, 2, 10 and 100 year 24 hour design storms. The drainage calculations must correctly model the proposed detention basin discharge to the existing 24 inch drainage pipe at Linda Manor and the stormwater system at Linda Manor to properly analyze how the systems will function together. Additional redesign of the existing drainage system at Linda Manor may be necessary to allow the drainage systems from both projects to function correctly and in accordance to the Stormwater Management Standards. • TSS removal calculations must be provided documenting the treatment trains for all areas of new impervious surface meet. • Soils investigation (by a Certified Soil Evaluator or Certified Professional Soil Scientist) must be conducted and documentation submitted including test pits or other tests for areas where construction of infiltration practices will occur. Information must be submitted verifying the soil conditions, the elevation of estimated seasonal high groundwater for the proposed infiltration areas, and how the proposed rate of infiltration was calculated. • The plans must specify where stormwater from the roof of the proposed building addition at Linda Manor flows. • The elevation of the proposed Stormtech Chambers must be specified in the plans and analysis of the structure must be included in drainage calculations discussed above. • The long-term post-construction stormwater maintenance plan must include all components of the proposed stormwater management system. • The applicant must provide documentation of the original design and current functioning of the existing stormwater system at Linda Manor and record of maintenance of this system. • The design of the proposed detention basin must show an emergency spillway and safe flow path of this overflow. • The design of the proposed detention basin must provide and specify an access route for maintenance. • Appropriate information (f ARP or STEP) must be submitted documenting the removal effectiveness of the proposed Stormceptors. The DPW requires that proprietary Stormwater BMPs such as Stormceptors be designed with an off-line configuration during larger storm events (diversion structures) to avoid re-suspension and discharge of sediment. • Snow storage areas must be indicated on the plans. • Easement(s) may be necessary to discharge stormwater from the Zoe Retirement stormwater system to the Linda Manor stormwater system and other adjacent properties. • The proposed rain garden must be designed in conformance with the guidance of the Massachusetts Stormwater Handbook including but not limited to: sizing of the structure, existing soil and groundwater conditions, proposed plantings, specification of the engineered soil mix and grading on the Site Grading Plan. Please submit the necessary items to the Northampton Department of Public Works as soon as possible to start the application review process. For additional infonnation contact Doug McDonald at 413-587-1582 or e-mail at dmcdonald@nohodpw.org. 2