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NOTICE OF INTENT MGL Ch. 131 s. 40

and City of Boston

For

Proposed Three Story Addition

Located at

31-33 Boardman StreetEast Boston, Massachusetts

Submitted to: City of Boston

Conservation Commission &

DEP N.E.R.O.

Prepared for:

Magnolia Boardman LLC40 Warren Street

Charlestown, MA 02129

Prepared by:

April 21, 2020 REVISED: April 23, 2020

Table of Contents

SECTION I. City of Boston Notice of Intent Application WPA Form 3 – Notice of Intent Figure 1 – USGS Locus Map Figure 2 – Ortho Photo Figure 3 – FEMA Flood Map Figure 4 – Natural Heritage Map Figure 5 – Soils Map NRCS Soils Description

SECTION II

Executive Summary Stormwater Checklist Operation and Maintenance Plan Illicit Discharge Statement Supporting BMP Calculations

SECTION III

Drainage Report

SECTION IV Wetland Fee Transmittal Form Copy of Checks

SECTION V

Affidavit of Service Abutter Notification Form Abutters List

SECTION I

City of Boston Notice of Intent Application WPA Form 3 Notice of Intent Figure 1 – USGS Locus Map Figure 2 – Ortho Photo Figure 3 – Natural Heritage Map Figure 4 – FEMA Flood Map Figure 5 – Soils Map NRCS Soils Description

NOTICE OF INTENT APPLICATION FORM Boston Wetlands Ordinance City of Boston Code, Ordinances, Chapter 7-1.4

1

_______________ Boston File Number

_______________ MassDEP File Number

A. GENERAL INFORMATION

1. Project Location

a. Street Address b. City/Town c. Zip Code

f. Assessors Map/Plat Number g. Parcel /Lot Number

2. Applicant

a. First Name b. Last Name c. Company

d. Mailing Address

e. City/Town f. State g. Zip Code

h. Phone Number i. Fax Number j. Email address

3. Property Owner

4. Representative (if any)


d. Mailing Address




d. Mailing Address



Check if more than one owner(If there is more than one property owner, please attach a list of these property owners to this form.)

31-33 Boardman Street East Boston 02128

PID: 0101734000 & 0101735000 (To be combined)

Vahid Nickpour Magnolia Boardman LLC

40 Warren Street

Charlestown MA 02129

617-799-8482 [email protected]

Richard Salvo Engineering Alliance, Inc.

194 Central Street

Saugus MA 01906

781-231-1349 [email protected]


2



5. Is any portion of the proposed project jurisdictional under the Massachusetts WetlandsProtection Act M.G.L. c. 131 §40?

Yes No

If yes, please file the WPA Form 3 - Notice of Intent with this form

6. General Information

7. Project Type Checklist

a. Single Family Home b. Residential Subdivision

c. Limited Project Driveway Crossing d. Commercial/Industrial

e. Dock/Pier f. Utilities

g. Coastal Engineering Structure h. Agriculture – cranberries, forestry

i. Transportation j. Other

8. Property recorded at the Registry of Deeds

a. County b. Page Number

c. Book d. Certificate # (if registered land)

B. BUFFER ZONE & RESOURCE AREA IMPACTS

Buffer Zone Only - Is the project located only in the Buffer Zone of a resource area protected by the Boston Wetlands Ordinance?

Yes No

1. Coastal Resource Areas

Resource Area Resource Area Size

Proposed Alteration*

Proposed Migitation

Coastal Flood Resilience ZoneSquare feet Square feet Square feet

The project consists of the construction of a three story addition between two existing three family dwellings (29 & 31 Boardman Street). The

three buildings are to be combined into one (31-33 Boardman Street). The project includes the building construction, stormwater management

facilities, and utility installation. All work will take place within the limit of the 100-year flood plain (LSCSF).

Suffolk

60077 (29 Boardman) & 60423 (33 Boardman)

185 (29 Boardman) & 167 (33 Boardman)

ebradanese

Accepted

ebradanese

Accepted

ebradanese

Accepted


3



25-foot Waterfront AreaSquare feet Square feet Square feet

2. Inland Resource Areas

Resource Area Resource Area Size

Proposed Alteration*

Proposed Migitation

Inland Flood Resilience ZoneSquare feet Square feet Square feet

Isolated WetlandsSquare feet Square feet Square feet

Vernal PoolSquare feet Square feet Square feet

Vernal Pool Habitat (vernal pool + 100 ft. upland area)Square feet Square feet Square feet

25-foot Waterfront AreaSquare feet Square feet Square feet

C. OTHER APPLICABLE STANDARDS & REQUIREMENTS

1. Is any portion of the proposed project located in Estimated Habitat of Rare Wildlife asindicated on the most recent Estimated Habitat Map of State-Listed Rare Wetland Wildlifepublished by the Natural Heritage and Endangered Species Program (NHESP)? To viewhabitat maps, see the Massachusetts Natural Heritage Atlas or go tohttp://www.mass.gov/dfwele/dfw/nhesp/nhregmap.htm.

Yes No

If yes, the project is subject to Massachusetts Endangered Species Act (MESA) review (321 CMR 10.18).

A. Submit Supplemental Information for Endangered Species Review

Percentage/acreage of property to be altered:

(1) within wetland Resource Area percentage/acreage

(2) outside Resource Area percentage/acreage

Assessor’s Map or right-of-way plan of site

2. Is the proposed project subject to provisions of the Massachusetts Stormwater Management

3. Is any portion of the proposed project within an Area of Critical Environmental Concern?

Yes No

http://www.mass.gov/dfwele/dfw/nhesp/nhregmap.htm

ebradanese

Accepted

ebradanese

Accepted

City of Boston Environment

NOTICE OF INTENT APPLICATION FORM

Boston Wetlands Ordinance Boston File Number

City of Boston Code, Ordinances, Chapter 7-1.4 MassDEP File Number

4. Is the proposed project subject to provisions of the Massachusetts Storm water Management

Standards?

Yes. Attach a copy of the Stonnwater Checklist & Stonnwater Report as required.

□ Applying for a Low Impact Development (LID) site design credits

A portion of the site constitutes redevelopment

□ Proprietary BMPs are included in the Stonnwater Management System

□ No. Check below & include a narrative as to why the project is exempt

□ Single-family house

□ Emergency road repair

□ Small Residential Subdivision (less than or equal to 4 single family houses or lessthan or equal to 4 units in a multifamily housing projects) with no discharge toCritical Areas

5. Is the proposed project subject to Boston Water and Sewer Commission Review?

Yes

D. SIGNATURES AND SUBMITTAL REQUIREMENTS

□ No

I hereby certify under the penalties of perjury that the foregoing Notice of Intent and accompanying plans, documents, and supporting data are true and complete to the best of my knowledge. I understand that the Conservation Commission will place notification of this Notice in a local newspaper at the expense of the applicant in accordance with the Wetlands

zz:;�� Signature of Applicant Date

Date

Date

CITY o/ BOSTON 4

□

wpaform3.doc • rev. 6/28/2016

Page 1 of 9

Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands

WPA Form 3 – Notice of Intent Massachusetts Wetlands Protection Act M.G.L. c. 131, §40

Provided by MassDEP:

MassDEP File Number

Document Transaction Number

Boston City/Town

Important: When filling out forms on the computer, use only the tab key to move your cursor - do not use the return key.

Note: Before completing this form consult your local Conservation Commission regarding any municipal bylaw or ordinance.

A. General Information

1. Project Location (Note: electronic filers will click on button to locate project site):

31-33 Boardman Street a. Street Address

East Boston b. City/Town

02128 c. Zip Code

Latitude and Longitude: 42.388128 d. Latitude

-71.009046 e. Longitude

f. Assessors Map/Plat Number

Parcel ID: 0101735000 & 0101734000 g. Parcel /Lot Number

2. Applicant:

Vahid a. First Name

Nickpour b. Last Name

Magnolia Boardman LLC c. Organization

40 Warren Street d. Street Address

Charlestown e. City/Town

MA f. State

02129 g. Zip Code

617-799-8482 h. Phone Number

i. Fax Number

[email protected] j. Email Address

3. Property owner (required if different from applicant): Check if more than one owner

a. First Name

b. Last Name

c. Organization

d. Street Address

e. City/Town

f. State

g. Zip Code

h. Phone Number

i. Fax Number

j. Email address

4. Representative (if any):

Richard a. First Name

Salvo b. Last Name

Engineering Alliance, Inc. c. Company

194 Central Street d. Street Address

Saugus e. City/Town

MA f. State

01906 g. Zip Code

(781) 231-1349 h. Phone Number

i. Fax Number

[email protected] j. Email address

5. Total WPA Fee Paid (from NOI Wetland Fee Transmittal Form):

$1,412.50 a. Total Fee Paid

$512.50 b. State Fee Paid

$900.00 c. City/Town Fee Paid


Page 2 of 9




MassDEP File Number


Boston City/Town

A. General Information (continued)

6. General Project Description:

The project consists of the construction of a three story addition between two existing three-family dwellings (29 & 31 Boardman Street). The three building are to be combined into one (31-33 Boardman Street). The project includes the building construction, stormwater management facilities, and utility installation. All work will take place within the limit of the 100 year flood plain (LSCSF).

7a. Project Type Checklist: (Limited Project Types see Section A. 7b.)

1. Single Family Home 2. Residential Subdivision

3. Commercial/Industrial 4. Dock/Pier

5. Utilities 6. Coastal engineering Structure

7. Agriculture (e.g., cranberries, forestry) 8. Transportation

9. Other

7b. Is any portion of the proposed activity eligible to be treated as a limited project (including Ecological

Restoration Limited Project) subject to 310 CMR 10.24 (coastal) or 310 CMR 10.53 (inland)?

1. Yes No If yes, describe which limited project applies to this project. (See 310 CMR 10.24 and 10.53 for a complete list and description of limited project types)

2. Limited Project Type

If the proposed activity is eligible to be treated as an Ecological Restoration Limited Project (310 CMR10.24(8), 310 CMR 10.53(4)), complete and attach Appendix A: Ecological Restoration Limited Project Checklist and Signed Certification.

8. Property recorded at the Registry of Deeds for:

Suffolk a. County

b. Certificate # (if registered land)

60077 (29 Boardman) & 60423 (33 Boardman) c. Book

185 (29 Boardman) & 167 (33 Boardman) d. Page Number

B. Buffer Zone & Resource Area Impacts (temporary & permanent)

1. Buffer Zone Only – Check if the project is located only in the Buffer Zone of a Bordering Vegetated Wetland, Inland Bank, or Coastal Resource Area.

2. Inland Resource Areas (see 310 CMR 10.54-10.58; if not applicable, go to Section B.3, Coastal Resource Areas).

Check all that apply below. Attach narrative and any supporting documentation describing how the project will meet all performance standards for each of the resource areas altered, including standards requiring consideration of alternative project design or location.


Page 3 of 9




MassDEP File Number


Boston City/Town

B. Buffer Zone & Resource Area Impacts (temporary & permanent) (cont’d)

For all projects affecting other Resource Areas, please attach a narrative explaining how the resource area was delineated.

Resource Area Size of Proposed Alteration Proposed Replacement (if any)

a. Bank 1. linear feet

2. linear feet

b. Bordering Vegetated Wetland

1. square feet

2. square feet

c. Land Under Waterbodies and Waterways

1. square feet

2. square feet

3. cubic yards dredged


d. Bordering Land Subject to Flooding

1. square feet

2. square feet

3. cubic feet of flood storage lost

4. cubic feet replaced

e. Isolated Land Subject to Flooding

1. square feet

2. cubic feet of flood storage lost

3. cubic feet replaced

f. Riverfront Area 1. Name of Waterway (if available) - specify coastal or inland

2. Width of Riverfront Area (check one):

25 ft. - Designated Densely Developed Areas only

100 ft. - New agricultural projects only

200 ft. - All other projects

3. Total area of Riverfront Area on the site of the proposed project:

square feet

4. Proposed alteration of the Riverfront Area:

a. total square feet

b. square feet within 100 ft.

c. square feet between 100 ft. and 200 ft.

5. Has an alternatives analysis been done and is it attached to this NOI? Yes No

6. Was the lot where the activity is proposed created prior to August 1, 1996? Yes No

3. Coastal Resource Areas: (See 310 CMR 10.25-10.35)

Note: for coastal riverfront areas, please complete Section B.2.f. above.


Page 4 of 9




MassDEP File Number


Boston City/Town

B. Buffer Zone & Resource Area Impacts (temporary & permanent) (cont’d)

Check all that apply below. Attach narrative and supporting documentation describing how the project will meet all performance standards for each of the resource areas altered, including standards requiring consideration of alternative project design or location.

Online Users: Include your document transaction number (provided on your receipt page) with all supplementary information you submit to the Department.


a. Designated Port Areas Indicate size under Land Under the Ocean, below

b. Land Under the Ocean 1. square feet


c. Barrier Beach Indicate size under Coastal Beaches and/or Coastal Dunes below

d. Coastal Beaches 1. square feet

2. cubic yards beach nourishment

e. Coastal Dunes

1. square feet

2. cubic yards dune nourishment

Size of Proposed Alteration Proposed Replacement (if any)

f. Coastal Banks

1. linear feet

g. Rocky Intertidal Shores

1. square feet

h. Salt Marshes

1. square feet

2. sq ft restoration, rehab., creation

i. Land Under Salt Ponds

1. square feet


j. Land Containing Shellfish

1. square feet

k. Fish Runs Indicate size under Coastal Banks, inland Bank, Land Under the Ocean, and/or inland Land Under Waterbodies and Waterways, above


l. Land Subject to Coastal Storm Flowage

9,000 s.f. 1. square feet

4. Restoration/Enhancement

If the project is for the purpose of restoring or enhancing a wetland resource area in addition to the square footage that has been entered in Section B.2.b or B.3.h above, please enter the additional amount here.

a. square feet of BVW

b. square feet of Salt Marsh

5. Project Involves Stream Crossings

a. number of new stream crossings

b. number of replacement stream crossings


Page 5 of 9




MassDEP File Number


Boston City/Town

C. Other Applicable Standards and Requirements

This is a proposal for an Ecological Restoration Limited Project. Skip Section C and complete Appendix A: Ecological Restoration Limited Project Checklists – Required Actions (310 CMR 10.11).

Streamlined Massachusetts Endangered Species Act/Wetlands Protection Act Review

1. Is any portion of the proposed project located in Estimated Habitat of Rare Wildlife as indicated on

the most recent Estimated Habitat Map of State-Listed Rare Wetland Wildlife published by the Natural Heritage and Endangered Species Program (NHESP)? To view habitat maps, see the Massachusetts Natural Heritage Atlas or go to http://maps.massgis.state.ma.us/PRI_EST_HAB/viewer.htm.

a. Yes No

If yes, include proof of mailing or hand delivery of NOI to: Natural Heritage and Endangered Species Program Division of Fisheries and Wildlife 1 Rabbit Hill Road Westborough, MA 01581

2011 b. Date of map

If yes, the project is also subject to Massachusetts Endangered Species Act (MESA) review (321 CMR 10.18). To qualify for a streamlined, 30-day, MESA/Wetlands Protection Act review, please complete Section C.1.c, and include requested materials with this Notice of Intent (NOI); OR complete Section C.2.f, if applicable. If MESA supplemental information is not included with the NOI, by completing Section 1 of this form, the NHESP will require a separate MESA filing which may take up to 90 days to review (unless noted exceptions in Section 2 apply, see below).

c. Submit Supplemental Information for Endangered Species Review

1. Percentage/acreage of property to be altered:

(a) within wetland Resource Area

percentage/acreage

(b) outside Resource Area

percentage/acreage

2. Assessor’s Map or right-of-way plan of site

2. Project plans for entire project site, including wetland resource areas and areas outside of

wetlands jurisdiction, showing existing and proposed conditions, existing and proposed tree/vegetation clearing line, and clearly demarcated limits of work

(a) Project description (including description of impacts outside of wetland resource area & buffer zone)

(b) Photographs representative of the site

Some projects not in Estimated Habitat may be located in Priority Habitat, and require NHESP review (see http://www.mass.gov/eea/agencies/dfg/dfw/natural-heritage/regulatory-review/). Priority Habitat includes habitat for state-listed plants and strictly upland species not protected by the Wetlands Protection Act. MESA projects may not be segmented (321 CMR 10.16). The applicant must disclose full development plans even if such plans are not required as part of the Notice of Intent process.


Page 6 of 9




MassDEP File Number


Boston City/Town

C. Other Applicable Standards and Requirements (cont’d)

(c) MESA filing fee (fee information available at http://www.mass.gov/dfwele/dfw/nhesp/regulatory_review/mesa/mesa_fee_schedule.htm). Make check payable to “Commonwealth of Massachusetts - NHESP” and mail to NHESP at above address

Projects altering 10 or more acres of land, also submit:

(d) Vegetation cover type map of site

(e) Project plans showing Priority & Estimated Habitat boundaries

(f) OR Check One of the Following

1. Project is exempt from MESA review.

Attach applicant letter indicating which MESA exemption applies. (See 321 CMR 10.14, http://www.mass.gov/dfwele/dfw/nhesp/regulatory_review/mesa/mesa_exemptions.htm; the NOI must still be sent to NHESP if the project is within estimated habitat pursuant to 310 CMR 10.37 and 10.59.)

2. Separate MESA review ongoing.

a. NHESP Tracking #

b. Date submitted to NHESP

3. Separate MESA review completed.

Include copy of NHESP “no Take” determination or valid Conservation & Management Permit with approved plan.

3. For coastal projects only, is any portion of the proposed project located below the mean high water line or in a fish run?

a. Not applicable – project is in inland resource area only b. Yes No

If yes, include proof of mailing, hand delivery, or electronic delivery of NOI to either:

South Shore - Cohasset to Rhode Island border, and the Cape & Islands:

Division of Marine Fisheries - Southeast Marine Fisheries Station Attn: Environmental Reviewer 1213 Purchase Street – 3rd Floor New Bedford, MA 02740-6694 Email: [email protected]

North Shore - Hull to New Hampshire border:

Division of Marine Fisheries - North Shore Office Attn: Environmental Reviewer 30 Emerson Avenue Gloucester, MA 01930 Email: [email protected]

Also if yes, the project may require a Chapter 91 license. For coastal towns in the Northeast Region, please contact MassDEP’s Boston Office. For coastal towns in the Southeast Region, please contact MassDEP’s Southeast Regional Office.


Page 7 of 9




MassDEP File Number


Boston City/Town

C. Other Applicable Standards and Requirements (cont’d)

Online Users: Include your document transaction number (provided on your receipt page) with all supplementary information you submit to the Department.

4. Is any portion of the proposed project within an Area of Critical Environmental Concern (ACEC)?

a. Yes No If yes, provide name of ACEC (see instructions to WPA Form 3 or MassDEP Website for ACEC locations). Note: electronic filers click on Website.

b. ACEC

5. Is any portion of the proposed project within an area designated as an Outstanding Resource Water (ORW) as designated in the Massachusetts Surface Water Quality Standards, 314 CMR 4.00?

a. Yes No

6. Is any portion of the site subject to a Wetlands Restriction Order under the Inland Wetlands Restriction Act (M.G.L. c. 131, § 40A) or the Coastal Wetlands Restriction Act (M.G.L. c. 130, § 105)?

a. Yes No

7. Is this project subject to provisions of the MassDEP Stormwater Management Standards?

a. Yes. Attach a copy of the Stormwater Report as required by the Stormwater Management Standards per 310 CMR 10.05(6)(k)-(q) and check if:

1. Applying for Low Impact Development (LID) site design credits (as described in Stormwater Management Handbook Vol. 2, Chapter 3)

2. A portion of the site constitutes redevelopment

3. Proprietary BMPs are included in the Stormwater Management System.

b. No. Check why the project is exempt:

1. Single-family house

2. Emergency road repair

3. Small Residential Subdivision (less than or equal to 4 single-family houses or less than or equal to 4 units in multi-family housing project) with no discharge to Critical Areas.

D. Additional Information

This is a proposal for an Ecological Restoration Limited Project. Skip Section D and complete Appendix A: Ecological Restoration Notice of Intent – Minimum Required Documents (310 CMR 10.12).

Applicants must include the following with this Notice of Intent (NOI). See instructions for details.

Online Users: Attach the document transaction number (provided on your receipt page) for any of the following information you submit to the Department.

1. USGS or other map of the area (along with a narrative description, if necessary) containing sufficient information for the Conservation Commission and the Department to locate the site. (Electronic filers may omit this item.)

2. Plans identifying the location of proposed activities (including activities proposed to serve as a Bordering Vegetated Wetland [BVW] replication area or other mitigating measure) relative to the boundaries of each affected resource area.


Page 8 of 9




MassDEP File Number


Boston City/Town

D. Additional Information (cont’d)

3. Identify the method for BVW and other resource area boundary delineations (MassDEP BVW Field Data Form(s), Determination of Applicability, Order of Resource Area Delineation, etc.), and attach documentation of the methodology.

4. List the titles and dates for all plans and other materials submitted with this NOI.

Plan to Accompany Notice of Intent a. Plan Title

Engineering Alliance, Inc. b. Prepared By

Richard A. Salvo, P.E. c. Signed and Stamped by

3/4/2020 d. Final Revision Date

1"=20' e. Scale

f. Additional Plan or Document Title

g. Date

5. If there is more than one property owner, please attach a list of these property owners not

listed on this form.

6. Attach proof of mailing for Natural Heritage and Endangered Species Program, if needed.

7. Attach proof of mailing for Massachusetts Division of Marine Fisheries, if needed.

8. Attach NOI Wetland Fee Transmittal Form

9. Attach Stormwater Report, if needed.

E. Fees

1. Fee Exempt: No filing fee shall be assessed for projects of any city, town, county, or district of the Commonwealth, federally recognized Indian tribe housing authority, municipal housing authority, or the Massachusetts Bay Transportation Authority.

Applicants must submit the following information (in addition to pages 1 and 2 of the NOI Wetland Fee Transmittal Form) to confirm fee payment:

19149 2. Municipal Check Number

3/5/2020 3. Check date

19148 4. State Check Number

3/5/2020 5. Check date

Nova Realty Trust 6. Payor name on check: First Name

7. Payor name on check: Last Name

PREPARED BY:

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DWG FILE NAME: Figures.dwg

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PROJECT: 20-67702

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FIGURE 1 - USGS LOCUS MAP

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Richard A. Salvo, P.E.

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Garrett Anderson

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February 25, 2020

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Plan of Land

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Engineering Alliance, Inc.

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Civil Engineering & Land Planning Consultants

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194 Central Street Saugus, MA 01906 Tel: (781) 231-1349 Fax: (781) 417-0020

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1950 Lafayette Road Portsmouth, NH 03801 Tel: (603) 610-7100 Fax: (603) 610-7101

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31-33 Boardman Street Parcel ID: 0101734000 & 0101735000 East Boston, MA 02128

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February 25, 2020

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NATIONAL FLOOD INSURANCE PROGRAM SUFFOLK COUNTY COMMUNITY PANEL NO: 25025C0019J EFFECTIVE DATE: March 16, 2016

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PROJECT: 20-67702

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February 25, 2020

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31-33 Boardman Street Parcel ID: 0101734000 &0101735000 East Boston, MA 02128

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LEGEND:

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NHESP PRIORITY HABITATS OF RARE SPECIES

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SITE

Norfolk and Suffolk Counties, Massachusetts

603—Urban land, wet substratum, 0 to 3 percent slopes

Map Unit SettingNational map unit symbol: vkylMean annual precipitation: 32 to 50 inchesMean annual air temperature: 45 to 50 degrees FFrost-free period: 120 to 200 daysFarmland classification: Not prime farmland

Map Unit CompositionUrban land: 85 percentMinor components: 15 percentEstimates are based on observations, descriptions, and transects of

the mapunit.

Description of Urban Land

SettingParent material: Excavated and filled land over herbaceous

organic material and/or alluvium and/or marine deposits

Minor Components

UdorthentsPercent of map unit: 13 percentHydric soil rating: Unranked

BeachesPercent of map unit: 2 percentHydric soil rating: Unranked

Data Source Information

Soil Survey Area: Norfolk and Suffolk Counties, MassachusettsSurvey Area Data: Version 15, Sep 12, 2019

Map Unit Description: Urban land, wet substratum, 0 to 3 percent slopes---Norfolk and Suffolk Counties, Massachusetts

Natural ResourcesConservation Service

Web Soil SurveyNational Cooperative Soil Survey

2/25/2020Page 1 of 1

SECTION II

Executive Summary Stormwater Checklist Operation and Maintenance Plan

Illicit Discharge Statement Supporting BMP Calculations

Executive Summary Proposed 3 Story Addition

31-33 Boardman Street East Boston, Massachusetts, 02128

Project Description

The project consists of modifications to a site comprised of approximately 0.21 acres (9,000 s.f.) of land located at 29 and 33 Boardman Street, East Boston, MA (Parcel IDs: 0101734000 & 0101735000). The properties are to be combined into one single parcel with the new address 31-33 Boardman Street. The property is currently occupied by two existing three family dwellings known as 29 Boardman Street (PID: 0101734000) and 33 Boardman Street (0101735000). The existing dwellings have footprints of 1,090 s.f. and 1,066 s.f. respectively. The site also includes an existing shed, pool, and landscaped area. The proposed project consists of the construction of a three-story addition in between the two existing three family dwellings. The new three-story addition will connect the two existing dwellings to create one building. The new addition will also serve as a new three family dwelling, creating a total of nine (9) units on the subject property. The project will also include the demolition of the existing shed and pool, interior renovations to both existing dwellings, a bituminous concrete entrance driveway, permeable paver parking area, new utility services, landscaped areas and incidental site grading. The project will also assign new street numbers to the parcel. The building formerly known as 29 Boardman Street will be assigned 31 Boardman Street, the new three-story addition will be assigned 31A Boardman Street and the building known as 33 Boardman will remain as currently constituted. The site abuts Boardman Street to the west, and residential land to the north, east, and south. Vehicle access will be provided via a new curb cut and driveway entrance from Boardman Street. The existing curb cut abutting 33 Boardman will be closed. Site Description The subject property is currently occupied by the two existing three-family dwellings, a shed, pool and landscaped areas. The topography varies throughout the property, with elevations at the entrance of the site ranging from 14.5 (+/-) to 15.0 (+/-) with slopes of up to 11%. Beyond the site entrance, the area is generally flat, pitching toward the rear of the property, ranging in slopes from 0.5% to 1.5%. All stormwater runoff drains via surface flow toward an offsite low point at the northern corner of the property. In the proposed condition, the new bituminous concrete driveway will pitch from Boardman Street (elev. 14.96 +/-) at approximately 11.5% toward the proposed permeable paver driveway/parking area at approximately elevation 8.75 (+/-). The proposed drive under garage elevation for each building has been set at elevation 8.75 (+/-). The drive under garage doors will include flood openings within 1’ of the proposed grade to allow flood waters to flow unimpeded. The permeable paver driveway/parking area will pitch away from the proposed garage at a minimum slope of 1% toward a low point in the proposed landscaped area. Stormwater runoff is intended to drain via roof drain and surface flow into the proposed permeable paver driveway/parking area. The graded low-point in the landscaped area has been included as relief for the paver system in high-intensity storm events. All stormwater generated by the proposed project will be maintained and mitigated on-site. The proposed groundcover of the site will be comprised of the existing buildings and new addition, the bituminous concrete driveway, the pervious paver driveway/parking area and landscaped areas. The Flood Insurance Rate Map for the City of Boston (Community Panel 25025C0019J with an effective date of March 16, 2016) describes the project site as Zone AE. Zone AE is classified as a special flood hazard area (SFHAs) subject to inundation by the 1% annual chance flood with base flood elevations determined. The base flood elevation for the subject property is elevation 16.45 (BCB). The entirety of the subject property is located within the limit of the 100-year flood plain. All lot lines, topography, utilities, and other existing site information used has been compiled from a field survey performed by Boston Survey, Inc. on February 5, 2020 and from plans of record obtained from the City of Boston where available.

Pre-Development Condition The site is presently occupied by the two existing three-family dwellings, walkways, and landscaped areas. Stormwater in the current condition drains via surface flow toward and offsite low point at the northern corner of the property. Technical Release 20 (TR-20) Program for Project Formulation Hydrology developed by the SCS was employed to develop pre and post-development peak flows. Drainage calculations were prepared for the pre-development condition for the 2, 10, 25, and 100-year type III storm events. Refer to Appendix A for computer results, soil characteristics, cover descriptions and times of concentrations for all subareas. Refer to Plan 1 of 2 in Appendix A for the delineation of pre-development drainage subareas. In both the pre-development and post-development stormwater analysis, the watershed area analyzed was the entire 9,000 s.f. of the subject property. The peak rates of runoff for the pre-development condition are as follows:

Post-Development Condition In the post-development condition, the three-story three-family addition will be constructed with a new bituminous concrete access driveway, permeable paver parking area, associated utility connections, stormwater management facilities, landscaped areas, and incidental site work. Refer to Plan 2 of 2 in Appendix B for proposed site grading and drainage facilities and the delineation of post-development drainage subareas. Design Points for the post-development condition correspond to that of the pre-development condition. Drainage calculations were performed by employing the SCS TR-20 Methods for the 2, 10, 25, and 100-year Type III storm events. Refer to Appendix B for computer results. The peak rates of runoff for this condition are as follows:

The proposed grading scheme intends to direct all stormwater runoff into the project site rather than to the offsite low point as in the existing condition. As a result, the comparison of the peak rates of runoff for both pre-development and post-development conditions indicates a significant decreased will be realized in the developed condition for all storm events. Stormwater Management Facilities Stormwater runoff generated by the existing dwellings, the proposed addition, the proposed bituminous concrete driveway, and the proposed permeable paver parking area will all discharge via surface flow to the stone bed beneath the permeable paver parking. The stone bed is proposed to be twenty-four inches (24”) in depth with six (6) twelve inch (12”) perforated P.E. ADS underdrains embedded. In large scale storm events, stormwater runoff will overflow from the permeable paver bed into a graded low-point in the landscaped area at the rear of the property. Proposed landscaped areas have been graded to direct stormwater flows to this graded low-point. The stormwater facilities were design to attenuate peak flows generated by all storm events up to and including the 100-year storm event. An infiltration rate of 1.02 in/hr was used based on the Rawls Rate of saturated hydraulic conductivity for a sandy loam soil type. Refer to Appendix A & B for the Stage Storage Curves and TR-20 computer results for the storage characteristics of the subsurface infiltration facilities. Refer to the Site Plans (attached) for design details.

2-Year Storm (3.10”)




Design Point #1 (Offsite Low-Point)

0.41 CFS 0.73 CFS 0.92 CFS 1.20






0.00 CFS 0.01 CFS 0.01 CFS 0.01 CFS

Stormwater Management Standards The proposed project is subject to the Stormwater Management Standards established in the Massachusetts Stormwater Handbook. Below is a list of the standards and explanation of project compliance: Standard 1: No new stormwater conveyances (e.g. outfalls) may discharge untreated storm water directly to or cause erosion in wetlands or waters of the Commonwealth.

No new stormwater outfalls are proposed as part of the project. The subject project complies with this standard. Standard 2: Stormwater management systems shall be designed so that the post-development peak discharge rates do not exceed pre-development peak discharge rates.

As mentioned in the previous sections of this report, peak discharge rates for all storms up to and including the 100-year storm event will be mitigated by the proposed design. Standard 3: Loss of annual recharge to groundwater shall be eliminated or minimized through the use of infiltration measures including environmentally sensitive site design, low impact development techniques, stormwater best management practices, and good operation and maintenance. At a minimum, the annual recharge from the post-development site shall approximate the annual recharge from the pre-development conditions based on soil type. This standard is met when the stormwater management system is designed to infiltrate the required recharge volume as determined in accordance with the Massachusetts Stormwater Handbook.

The proposed stormwater management system has been sized to accommodate the required recharge volume. Refer to Section II, “Supporting BMP Calculations” for the required and provided recharge volumes. Standard 4: Stormwater management systems shall be designed to remove 80% of the average annual post construction load of Total Suspended Solids (TSS) The proposed stormwater management system has been designed to remove 80% of the average annual post construction load of TSS. Refer to Section II, “Supporting BMP Calculations” for the proposed treatment train and TSS removal rates. Standard 5: For land uses with higher potential pollutant loads….

This standard is not applicable to the subject property. Standard 6: Stormwater discharges within the Zone II or Interim Wellhead Protection Area….

This standard is not applicable to the subject property. Standard 7: A redevelopment project is required to meet the following Stormwater Management Standards only to the maximum extent practicable: Standard 2, Standard 3 and structural best management practice requirements of Standards 4,5 and 6.

The subject property is classified as new construction and there this standard is not applicable to the subject property.

Standard 8 A plan to control construction –related impacts including erosion, sedimentation and other pollutant sources during construction and land disturbance activities (construction period erosion, sedimentation, and pollution preventions plan) shall be developed and implemented.

The design of the subject project has been updated to include double staked haybales as a temporary erosion control measure. Given the size and scope of the proposed improvements a minimal amount of soil will be disturbed that could cause erosion and/or sedimentation. Standard 9: A long-term operation and maintenance plan shall be developed and implemented to ensure that stormwater management systems function as designed.

A pre and post construction Best Management Practices Operations and Maintenance Plan has been prepared for this project. Refer to Section II, “Operations and Maintenance Plan.”

Standard 10: All illicit discharges to the stormwater management system are prohibited

An illicit discharge statement has been provided in Section II. The project is in full compliance with this standard. Erosion and Siltation Control Straw wattles and silt fence will be placed at the downhill limit of work prior to the commencement of any construction activity. The integrity of the erosion control devices will be maintained by periodic inspection and replacement as necessary. The straw wattles and silt fence will remain in place until the first course of pavement has been placed and all side slopes have been loamed and seeded and vegetation has been established. Regulatory Compliance The resource area affected by the proposed development is Land Subject to Coastal Storm Flowage. The subject property is located within a Zone AE established by the corresponding FEMA Flood map. The base flood elevation for the subject property is elevation 16.45 (BCB). Currently, land subject to coastal storm flowage does not have any performance standards. Adaptation, Resiliency and Sea Level Rise Although the Site is located within the 100-year coastal flood plain, it does not have a history of flooding while other areas of the City have been susceptible to flooding during storms with larger intensities. Notwithstanding the fact that the subject property does not have a history of flooding, according to the most recent Flood Insurance Rate Map (FIRM) no. 25025C0019J dated March 16, 2016, the subject property is located in a Zone AE with a base flood elevation of 10 (NAVD88) or 16.45 Boston City Base (BCB). The subject property is located approximately ½ mile from the flooding source. It is likely that as flood waters enter the East Boston Neighborhood, flood waters will be deflected and re-directed before affecting the subject property. Notwithstanding that fact, the base flood elevation of 16.45 reported on the FIRM map was utilized for design purposes.

The subject property is currently occupied by two existing dwellings that are separated by a vacant lawn area. The proposal includes the construction of a proposed dwelling that will connect the two existing buildings and “in-fill” the vacant lawn area. The first floor elevations for the existing buildings are 16.6 (33 Boardman) and 17.7 (29 Boardman) (BCB). Each building contains a basement which houses the mechanical equipment. While the first floor elevations are above the 100-year floodplain (16.45), the basements, including the mechanical equipment are currently below the 100-year flood plain.

The proposed first floor elevation of the new dwelling is 16.75. The dwelling at 29 Boardman will be retrofitted to match the floor elevation of the proposed building. The floor elevation has been raised as high as possible so as to allow for ADA access to the structure. In addition the grade at the rear of the dwellings will be excavated approximately 2-ft so that the basements can be converted into garages and the space will no longer be considered an “enclosed” space.

The mechanical equipment for all three buildings will be re-located to the first floor such that it will be above the floodplain.

The following measures will have been incorporated to address sea level rise and coastal resiliency:

The first floor elevation has been raised as high as possible above the 100-year flood plain to still allow for ADA access. The elevation is limited by the current elevation of the existing structures.

The mechanical equipment will be relocated from the basement to the first floor so as to be above the 100-year flood plain.

The currently enclosed basements will be converted to garages and the grade at the rear of the structures will be excavated such that the grade is pitched toward the rear of the property. This will eliminate the current “enclosed” space below the flood plain. In the current condition, during a flooding event, the basements would fill with flood water with no way for flood waters to exit the building. In the post development condition, should a flooding event occur, the flood waters can flow back out of the garages via breakaway panels and infiltrate in the back yard once flood waters recede.

swcheck.doc • 04/01/08 Stormwater Report Checklist • Page 3 of 8

Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program

Checklist for Stormwater Report

Checklist (continued) LID Measures: Stormwater Standards require LID measures to be considered. Document what

environmentally sensitive design and LID Techniques were considered during the planning and design of the project:

No disturbance to any Wetland Resource Areas

Site Design Practices (e.g. clustered development, reduced frontage setbacks)

Reduced Impervious Area (Redevelopment Only)

Minimizing disturbance to existing trees and shrubs

LID Site Design Credit Requested:

Credit 1

Credit 2

Credit 3

Use of “country drainage” versus curb and gutter conveyance and pipe

Bioretention Cells (includes Rain Gardens)

Constructed Stormwater Wetlands (includes Gravel Wetlands designs)

Treebox Filter

Water Quality Swale

Grass Channel

Green Roof

Other (describe):

Permeable Pavers

Standard 1: No New Untreated Discharges

No new untreated discharges

Outlets have been designed so there is no erosion or scour to wetlands and waters of the Commonwealth

Supporting calculations specified in Volume 3 of the Massachusetts Stormwater Handbook included.




Checklist (continued)

Standard 2: Peak Rate Attenuation

Standard 2 waiver requested because the project is located in land subject to coastal storm flowage and stormwater discharge is to a wetland subject to coastal flooding.

Evaluation provided to determine whether off-site flooding increases during the 100-year 24-hour storm.

Calculations provided to show that post-development peak discharge rates do not exceed pre-

development rates for the 2-year and 10-year 24-hour storms. If evaluation shows that off-site flooding increases during the 100-year 24-hour storm, calculations are also provided to show that post-development peak discharge rates do not exceed pre-development rates for the 100-year 24-hour storm.

Standard 3: Recharge

Soil Analysis provided.

Required Recharge Volume calculation provided.

Required Recharge volume reduced through use of the LID site Design Credits.

Sizing the infiltration, BMPs is based on the following method: Check the method used.

Static Simple Dynamic Dynamic Field1

Runoff from all impervious areas at the site discharging to the infiltration BMP.

Runoff from all impervious areas at the site is not discharging to the infiltration BMP and calculations

are provided showing that the drainage area contributing runoff to the infiltration BMPs is sufficient to generate the required recharge volume.

Recharge BMPs have been sized to infiltrate the Required Recharge Volume.

Recharge BMPs have been sized to infiltrate the Required Recharge Volume only to the maximum extent practicable for the following reason:

Site is comprised solely of C and D soils and/or bedrock at the land surface

M.G.L. c. 21E sites pursuant to 310 CMR 40.0000

Solid Waste Landfill pursuant to 310 CMR 19.000

Project is otherwise subject to Stormwater Management Standards only to the maximum extent practicable.

Calculations showing that the infiltration BMPs will drain in 72 hours are provided.

Property includes a M.G.L. c. 21E site or a solid waste landfill and a mounding analysis is included.

1 80% TSS removal is required prior to discharge to infiltration BMP if Dynamic Field method is used.





Standard 3: Recharge (continued)

The infiltration BMP is used to attenuate peak flows during storms greater than or equal to the 10-

year 24-hour storm and separation to seasonal high groundwater is less than 4 feet and a mounding analysis is provided.

Documentation is provided showing that infiltration BMPs do not adversely impact nearby wetland resource areas.

Standard 4: Water Quality

The Long-Term Pollution Prevention Plan typically includes the following: Good housekeeping practices; Provisions for storing materials and waste products inside or under cover; Vehicle washing controls; Requirements for routine inspections and maintenance of stormwater BMPs; Spill prevention and response plans; Provisions for maintenance of lawns, gardens, and other landscaped areas; Requirements for storage and use of fertilizers, herbicides, and pesticides; Pet waste management provisions; Provisions for operation and management of septic systems; Provisions for solid waste management; Snow disposal and plowing plans relative to Wetland Resource Areas; Winter Road Salt and/or Sand Use and Storage restrictions; Street sweeping schedules; Provisions for prevention of illicit discharges to the stormwater management system; Documentation that Stormwater BMPs are designed to provide for shutdown and containment in the

event of a spill or discharges to or near critical areas or from LUHPPL; Training for staff or personnel involved with implementing Long-Term Pollution Prevention Plan; List of Emergency contacts for implementing Long-Term Pollution Prevention Plan.

A Long-Term Pollution Prevention Plan is attached to Stormwater Report and is included as an attachment to the Wetlands Notice of Intent.

Treatment BMPs subject to the 44% TSS removal pretreatment requirement and the one inch rule for calculating the water quality volume are included, and discharge:

is within the Zone II or Interim Wellhead Protection Area

is near or to other critical areas

is within soils with a rapid infiltration rate (greater than 2.4 inches per hour)

involves runoff from land uses with higher potential pollutant loads.

The Required Water Quality Volume is reduced through use of the LID site Design Credits.

Calculations documenting that the treatment train meets the 80% TSS removal requirement and, if applicable, the 44% TSS removal pretreatment requirement, are provided.





Standard 4: Water Quality (continued)

The BMP is sized (and calculations provided) based on:

The ½” or 1” Water Quality Volume or

The equivalent flow rate associated with the Water Quality Volume and documentation is provided showing that the BMP treats the required water quality volume.

The applicant proposes to use proprietary BMPs, and documentation supporting use of proprietary

BMP and proposed TSS removal rate is provided. This documentation may be in the form of the propriety BMP checklist found in Volume 2, Chapter 4 of the Massachusetts Stormwater Handbook and submitting copies of the TARP Report, STEP Report, and/or other third party studies verifying performance of the proprietary BMPs.

A TMDL exists that indicates a need to reduce pollutants other than TSS and documentation showing

that the BMPs selected are consistent with the TMDL is provided.

Standard 5: Land Uses With Higher Potential Pollutant Loads (LUHPPLs)

The NPDES Multi-Sector General Permit covers the land use and the Stormwater Pollution

Prevention Plan (SWPPP) has been included with the Stormwater Report.

The NPDES Multi-Sector General Permit covers the land use and the SWPPP will be submitted prior

to the discharge of stormwater to the post-construction stormwater BMPs.

The NPDES Multi-Sector General Permit does not cover the land use.

LUHPPLs are located at the site and industry specific source control and pollution prevention measures have been proposed to reduce or eliminate the exposure of LUHPPLs to rain, snow, snow melt and runoff, and been included in the long term Pollution Prevention Plan.

All exposure has been eliminated.

All exposure has not been eliminated and all BMPs selected are on MassDEP LUHPPL list.

The LUHPPL has the potential to generate runoff with moderate to higher concentrations of oil and grease (e.g. all parking lots with >1000 vehicle trips per day) and the treatment train includes an oil grit separator, a filtering bioretention area, a sand filter or equivalent.

Standard 6: Critical Areas

The discharge is near or to a critical area and the treatment train includes only BMPs that MassDEP

has approved for stormwater discharges to or near that particular class of critical area.

Critical areas and BMPs are identified in the Stormwater Report.





Standard 7: Redevelopments and Other Projects Subject to the Standards only to the maximum extent practicable

The project is subject to the Stormwater Management Standards only to the maximum Extent

Practicable as a:

Limited Project

Small Residential Projects: 5-9 single family houses or 5-9 units in a multi-family development

provided there is no discharge that may potentially affect a critical area.

Small Residential Projects: 2-4 single family houses or 2-4 units in a multi-family development with a discharge to a critical area

Marina and/or boatyard provided the hull painting, service and maintenance areas are protected

from exposure to rain, snow, snow melt and runoff

Bike Path and/or Foot Path

Redevelopment Project

Redevelopment portion of mix of new and redevelopment.

Certain standards are not fully met (Standard No. 1, 8, 9, and 10 must always be fully met) and an

explanation of why these standards are not met is contained in the Stormwater Report.

The project involves redevelopment and a description of all measures that have been taken to improve existing conditions is provided in the Stormwater Report. The redevelopment checklist found in Volume 2 Chapter 3 of the Massachusetts Stormwater Handbook may be used to document that the proposed stormwater management system (a) complies with Standards 2, 3 and the pretreatment and structural BMP requirements of Standards 4-6 to the maximum extent practicable and (b) improves existing conditions.

Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control

A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan must include the following information:

Narrative; Construction Period Operation and Maintenance Plan; Names of Persons or Entity Responsible for Plan Compliance; Construction Period Pollution Prevention Measures; Erosion and Sedimentation Control Plan Drawings; Detail drawings and specifications for erosion control BMPs, including sizing calculations; Vegetation Planning; Site Development Plan; Construction Sequencing Plan; Sequencing of Erosion and Sedimentation Controls; Operation and Maintenance of Erosion and Sedimentation Controls; Inspection Schedule; Maintenance Schedule; Inspection and Maintenance Log Form.

A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan containing

the information set forth above has been included in the Stormwater Report.





Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control (continued)

The project is highly complex and information is included in the Stormwater Report that explains why it is not possible to submit the Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan with the application. A Construction Period Pollution Prevention and Erosion and Sedimentation Control has not been included in the Stormwater Report but will be submitted before land disturbance begins.

The project is not covered by a NPDES Construction General Permit.

The project is covered by a NPDES Construction General Permit and a copy of the SWPPP is in the

Stormwater Report.

The project is covered by a NPDES Construction General Permit but no SWPPP been submitted.

The SWPPP will be submitted BEFORE land disturbance begins.

Standard 9: Operation and Maintenance Plan

The Post Construction Operation and Maintenance Plan is included in the Stormwater Report and

includes the following information:

Name of the stormwater management system owners;

Party responsible for operation and maintenance;

Schedule for implementation of routine and non-routine maintenance tasks;

Plan showing the location of all stormwater BMPs maintenance access areas;

Description and delineation of public safety features;

Estimated operation and maintenance budget; and

Operation and Maintenance Log Form.

The responsible party is not the owner of the parcel where the BMP is located and the Stormwater

Report includes the following submissions:

A copy of the legal instrument (deed, homeowner’s association, utility trust or other legal entity) that establishes the terms of and legal responsibility for the operation and maintenance of the project site stormwater BMPs;

A plan and easement deed that allows site access for the legal entity to operate and maintain

BMP functions.

Standard 10: Prohibition of Illicit Discharges

The Long-Term Pollution Prevention Plan includes measures to prevent illicit discharges;

An Illicit Discharge Compliance Statement is attached;

NO Illicit Discharge Compliance Statement is attached but will be submitted prior to the discharge of

any stormwater to post-construction BMPs.

OPERATION AND MAINTENANCE PLAN

For The

Proposed 3 Story Addition

located at 31-33 Boardman Street

East Boston, Massachusetts


Conservation Commission &

DEP N.E.R.O.

Prepared for:

Magnolia Boardman LLC 40 Warren Street


Prepared by


BEST MANAGEMENT PRACTICES MAINTENANCE PLAN A Best Management Practices Operations and Maintenance Plan is summarized below and will be incorporated into the construction documents for this project. In accordance with the Storm Water Management Regulations issued by the Department of Environmental Protection (DEP), Engineering Alliance, Inc. has prepared the following best management practices operations and maintenance plan for the proposed development of the property located at 31-33 Boardman Street in East Boston, Massachusetts. This plan is broken into two major sections. The first section is construction-related erosion and sedimentation controls. The second section is devoted to a post-development operation and maintenance plan.

Basic Information Owner: Magnolia Boardman LLC

40 Warren Street Charlestown, MA 02129

Section 1 - Construction Activities

1. Contact the City of Boston at least three (3) days prior to start of construction.

2. Install haybales and silt fence to prevent sediment from leaving the subject property.

3. Install silt sacks in existing catch basins prior to any construction.

4. The contractor shall only disturb the minimum area necessary.

5. Proper erosion and sediment control must be employed around all material stockpile areas and efficient. Regular provisions for dust control must be used, via a water truck or other acceptable method.

6. The entire project area shall be swept upon completion of construction and prior to removal of the

erosion control devices.

Section 2 – Post Development Operation & Maintenance 1. Eco-Stone Permeable Pavement – Eco-Stone areas should be maintained periodically to maintain

infiltration. Care should be taken to keep sediment off the pavement during and after construction. Yearly cleaning by a vacuum-type street cleaner should be performed when the pavement is dry. Vacuum settings should be adjusted to prevent the uptake of aggregate in the pavement openings and joints. It is important to keep the drainage voids and joints filled with aggregate. Replenishment can be done, if needed, at the time of cleaning.

2. Pesticides, Herbicides, and Fertilizers - Pesticides and herbicides shall not be used within the limits of the

100-foot buffer zone to any wetland resource areas as defined under 310 CMR 10.00. In addition, fertilizers that are used within this zone should be restricted to organic fertilizers only.

3. Snow removal and storage - Plowed snow shall be placed in the pervious areas where it can slowly

infiltrate. Sediments shall be removed from this area every spring. When the amount of snow exceeds the capacity of the snow storage area, it shall be removed from the site by a privately contracted company.

4. Maintenance Responsibilities - All post construction maintenance activities should be documented and kept

on file and made available to the City of Boston upon request. All post construction maintenance activities shall run with the title of the property in perpetuity.

Project: Proposed 3 Story Addition Prepared By:Client: Magnolia Boardman LLC Checked By:Project Number: 20-67702 Date:

= F x

===

sf =

NOTES:

K = Saturated Hydraulic Conductivity

EJBRAS

03/10/20

Rv impervious area

STANDARD 3: REQUIRED RECHARGE VOLUME - Permeable Paver Stone Bed & Underdrain

Rv Required Recharge VolumeF Target Depth associated with each Hydrologic Soil Group

Impervious Area total impervious area

Impervious Area: 5,963 0.14 acres

Hydrologic Group Volume to RechargeA 0.60B 0.35C 0.25D 0.10

Rv = 0.14 x 0.25 x1 ft

x43,560 sf

= 124 CF12 in. 1 ac.

1.Total storage capacity of the of subsurface infiltration facility (24" stone bed beneath permeable paver driveway/parking area with six (6) 60 LF 12" perforated underdrains). These value were taken from the HydroCAD model. . 1,128 CF > 123 CF

DRAWDOWN WITHIN 72 HOURS

Timedrawdown=Recharge VolumeK(Bottom Area)

Subsurface Infiltration Facility

Timedrawdown=1,128

= 8.56 < 72 HRS(1.02 in/hr)(1/12 ft/in)(1550sf)

NOTES:1. K value is for Sandy Loam as shown in Table 2.3.3, entitled "1982 Rawls Rates," in the MADEPStormwater Management Standards.2. Bottom Area is equal to the total area of the permeable paver driveway/parking area.

Project: Proposed 3 Story Addition Prepared By:Client: Magnolia Boardman LLC Checked By:Project Number: 20-67702 Date:

= / x x

= Required Water Quality Volume (in cubic feet)= Water Quality Depth= Impervious Area (in acres)

= / x x =

NOTES:

CONCLUSION:

1,1281,128

1. Storage volume for the stormwater BMPs obtained from the hydrologic model created in HydroCAD

1. The storage volume provided by the proposed BMPs is greater than the required water quality treatment volume. 1,128 CF > 254 CF

Stone Bed & UnderdrainTotal

43,560 square feet/acre) 254 CF

VolumeStormwater BMP

43,560 square feet/acre)

V WQ

D WQ

A IMP

VWQ (0.5 in. 12 inches/foot) (0.14

STANDARD 4: WATER QUALITY - Cultec 330XLHD (System #1)

EJBRAS

03/10/20

WATER QUALITY TREATMENT VOLUME

V WQ (D WQ in. 12 inches/foot) (A IMP

TSS Removal Calculations

Name: 31-33 Boardman Street Proj. No.: 20-67702East Boston, MA Date: 3/10/2020

Client: Magnolia Boardman LLC Computed by: EJB County: Suffolk Checked by: RAS

Systems: Permeable Paver Driveway

A B C D EBMP TSS Removal Starting TSS Amount Remaining

Rate Load* Removed (BxC) Load (C-D)

*Permeable Pavers achieve 80% removal when bed is sized to hold 0.5" or 1" WQV and drain within 72 hours

Total TSS Removal=

Notes:

0.20

80%

*Starting TSS Load for first BMP= 1.00. TSS load for subsequent BMP's is equal to the Remaining Load (E) from the previous BMP.

Permeable Pavers Stone Bed & Underdrain*

80 1.00 0.8

SECTION III

Drainage Report

DRAINAGE CALCULATIONS

AND

STORMWATER MANAGEMENT PLAN

For The

Proposed Three Story Addition

located at 31-33 Boardman Street



Conservation Commission

Prepared for:

Magnolia Boardman LLC 40 Warren Street


Prepared by


Table of Contents

Page 1. NARRATIVE

Project Description 1

Site Description 1

Pre-Development Condition 1-2

Post-Development Condition 2

Stormwater Management Facilities 2

Stormwater Management Standards 3-4

Erosion and Siltation Control 4

Regulatory Compliance 4

2. APPENDICIES

APPENDIX A Existing Conditions Drainage Calculations Existing Watershed Plan

APPENDIX B Proposed Conditions Drainage Calculations

Proposed Watershed Plans

Proposed 3 Story Addition 31-33 Boardman Street

East Boston, Massachusetts, 02128

Project Description

The project consists of modifications to a site comprised of approximately 0.21 acres (9,000 s.f.) of land located at 29 and 33 Boardman Street, East Boston, MA (Parcel IDs: 0101734000 & 0101735000). The properties are to be combined into one single parcel with the new address 31-33 Boardman Street. The property is currently occupied by two existing three family dwellings known as 29 Boardman Street (PID: 0101734000) and 33 Boardman Street (0101735000). The existing dwellings have footprints of 1,090 s.f. and 1,066 s.f. respectively. The site also includes an existing shed, pool, and landscaped area. The proposed project consists of the construction of a three-story addition in between the two existing three family dwellings. The new three-story addition will connect the two existing dwellings to create one building. The new addition will also serve as a new three family dwelling, creating a total of nine (9) units on the subject property. The project will also include the demolition of the existing shed and pool, interior renovations to both existing dwellings, a bituminous concrete entrance driveway, permeable paver parking area, new utility services, landscaped areas and incidental site grading. The project will also assign new street numbers to the parcel. The building formerly known as 29 Boardman Street will be assigned 31 Boardman Street, the new three-story addition will be assigned 31A Boardman Street and the building known as 33 Boardman will remain as currently constituted. The site abuts Boardman Street to the west, and residential land to the north, east, and south. Vehicle access will be provided via a new curb cut and driveway entrance from Boardman Street. The existing curb cut abutting 33 Boardman will be closed. Site Description The subject property is currently occupied by the two existing three-family dwellings, a shed, pool and landscaped areas. The topography varies throughout the property, with elevations at the entrance of the site ranging from 14.5 (+/-) to 15.0 (+/-) with slopes of up to 11%. Beyond the site entrance, the area is generally flat, pitching toward the rear of the property, ranging in slopes from 0.5% to 1.5%. All stormwater runoff drains via surface flow toward an offsite low point at the northern corner of the property. In the proposed condition, the new bituminous concrete driveway will pitch from Boardman Street (elev. 14.96 +/-) at approximately 11.5% toward the proposed permeable paver driveway/parking area at approximately elevation 8.75 (+/-). The proposed drive under garage elevation for each building has been set at elevation 8.75 (+/-). The drive under garage doors will include flood openings within 1’ of the proposed grade to allow flood waters to flow unimpeded. The permeable paver driveway/parking area will pitch away from the proposed garage at a minimum slope of 1% toward a low point in the proposed landscaped area. Stormwater runoff is intended to drain via roof drain and surface flow into the proposed permeable paver driveway/parking area. The graded low-point in the landscaped area has been included as relief for the paver system in high-intensity storm events. All stormwater generated by the proposed project will be maintained and mitigated on-site. The proposed groundcover of the site will be comprised of the existing buildings and new addition, the bituminous concrete driveway, the pervious paver driveway/parking area and landscaped areas. The Flood Insurance Rate Map for the City of Boston (Community Panel 25025C0019J with an effective date of March 16, 2016) describes the project site as Zone AE. Zone AE is classified as a special flood hazard area (SFHAs) subject to inundation by the 1% annual chance flood with base flood elevations determined. The base flood elevation for the subject property is elevation 16.45 (BCB). The entirety of the subject property is located within the limit of the 100-year flood plain. All lot lines, topography, utilities, and other existing site information used has been compiled from a field survey performed by Boston Survey, Inc. on February 5, 2020 and from plans of record obtained from the City of Boston where available.

Pre-Development Condition The site is presently occupied by the two existing three-family dwellings, walkways, and landscaped areas. Stormwater in the current condition drains via surface flow toward and offsite low point at the northern corner of the property. Technical Release 20 (TR-20) Program for Project Formulation Hydrology developed by the SCS was employed to develop pre and post-development peak flows. Drainage calculations were prepared for the pre-development condition for the 2, 10, 25, and 100-year type III storm events. Refer to Appendix A for computer results, soil characteristics, cover descriptions and times of concentrations for all subareas. Refer to Plan 1 of 2 in Appendix A for the delineation of pre-development drainage subareas. In both the pre-development and post-development stormwater analysis, the watershed area analyzed was the entire 9,000 s.f. of the subject property. The peak rates of runoff for the pre-development condition are as follows:

Post-Development Condition In the post-development condition, the three-story three-family addition will be constructed with a new bituminous concrete access driveway, permeable paver parking area, associated utility connections, stormwater management facilities, landscaped areas, and incidental site work. Refer to Plan 2 of 2 in Appendix B for proposed site grading and drainage facilities and the delineation of post-development drainage subareas. Design Points for the post-development condition correspond to that of the pre-development condition. Drainage calculations were performed by employing the SCS TR-20 Methods for the 2, 10, 25, and 100-year Type III storm events. Refer to Appendix B for computer results. The peak rates of runoff for this condition are as follows:

The proposed grading scheme intends to direct all stormwater runoff into the project site rather than to the offsite low point as in the existing condition. As a result, the comparison of the peak rates of runoff for both pre-development and post-development conditions indicates a significant decreased will be realized in the developed condition for all storm events. Stormwater Management Facilities Stormwater runoff generated by the existing dwellings, the proposed addition, the proposed bituminous concrete driveway, and the proposed permeable paver parking area will all discharge via surface flow to the stone bed beneath the permeable paver parking. The stone bed is proposed to be twenty-four inches (24”) in depth with six (6) twelve inch (12”) perforated P.E. ADS underdrains embedded. In large scale storm events, stormwater runoff will overflow from the permeable paver bed into a graded low-point in the landscaped area at the rear of the property. Proposed landscaped areas have been graded to direct stormwater flows to this graded low-point. The stormwater facilities were design to attenuate peak flows generated by all storm events up to and including the 100-year storm event. An infiltration rate of 1.02 in/hr was used based on the Rawls Rate of saturated hydraulic conductivity for a sandy loam soil type. Refer to Appendix A & B for the Stage Storage Curves and TR-20 computer results for the storage characteristics of the subsurface infiltration facilities. Refer to the Site Plans (attached) for design details.






0.41 CFS 0.73 CFS 0.92 CFS 1.20






0.00 CFS 0.01 CFS 0.01 CFS 0.01 CFS

Stormwater Management Standards The proposed project is subject to the Stormwater Management Standards established in the Massachusetts Stormwater Handbook. Below is a list of the standards and explanation of project compliance: Standard 1: No new stormwater conveyances (e.g. outfalls) may discharge untreated storm water directly to or cause erosion in wetlands or waters of the Commonwealth.

No new stormwater outfalls are proposed as part of the project. The subject project complies with this standard. Standard 2: Stormwater management systems shall be designed so that the post-development peak discharge rates do not exceed pre-development peak discharge rates.

As mentioned in the previous sections of this report, peak discharge rates for all storms up to and including the 100-year storm event will be mitigated by the proposed design. Standard 3: Loss of annual recharge to groundwater shall be eliminated or minimized through the use of infiltration measures including environmentally sensitive site design, low impact development techniques, stormwater best management practices, and good operation and maintenance. At a minimum, the annual recharge from the post-development site shall approximate the annual recharge from the pre-development conditions based on soil type. This standard is met when the stormwater management system is designed to infiltrate the required recharge volume as determined in accordance with the Massachusetts Stormwater Handbook.

The proposed stormwater management system has been sized to accommodate the required recharge volume. Refer to Section II, “Supporting BMP Calculations” for the required and provided recharge volumes. Standard 4: Stormwater management systems shall be designed to remove 80% of the average annual post construction load of Total Suspended Solids (TSS) The proposed stormwater management system has been designed to remove 80% of the average annual post construction load of TSS. Refer to Section II, “Supporting BMP Calculations” for the proposed treatment train and TSS removal rates. Standard 5: For land uses with higher potential pollutant loads….

This standard is not applicable to the subject property. Standard 6: Stormwater discharges within the Zone II or Interim Wellhead Protection Area….

This standard is not applicable to the subject property. Standard 7: A redevelopment project is required to meet the following Stormwater Management Standards only to the maximum extent practicable: Standard 2, Standard 3 and structural best management practice requirements of Standards 4,5 and 6.

The subject property is classified as new construction and there this standard is not applicable to the subject property.

Standard 8 A plan to control construction –related impacts including erosion, sedimentation and other pollutant sources during construction and land disturbance activities (construction period erosion, sedimentation, and pollution preventions plan) shall be developed and implemented.

The design of the subject project has been updated to include double staked haybales as a temporary erosion control measure. Given the size and scope of the proposed improvements a minimal amount of soil will be disturbed that could cause erosion and/or sedimentation. Standard 9: A long-term operation and maintenance plan shall be developed and implemented to ensure that stormwater management systems function as designed.

A pre and post construction Best Management Practices Operations and Maintenance Plan has been prepared for this project. Refer to Section II, “Operations and Maintenance Plan.”

Standard 10: All illicit discharges to the stormwater management system are prohibited

An illicit discharge statement has been provided in Section II. The project is in full compliance with this standard. Erosion and Siltation Control Straw wattles and silt fence will be placed at the downhill limit of work prior to the commencement of any construction activity. The integrity of the erosion control devices will be maintained by periodic inspection and replacement as necessary. The straw wattles and silt fence will remain in place until the first course of pavement has been placed and all side slopes have been loamed and seeded and vegetation has been established. Regulatory Compliance The resource area affected by the proposed development is Land Subject to Coastal Storm Flowage. The subject property is located within a Zone AE established by the corresponding FEMA Flood map. The base flood elevation for the subject property is elevation 16.45 (BCB). Currently, land subject to coastal storm flowage does not have any performance standards.

APPENDIX A

Existing Conditions Drainage Calculations Existing Watershed Plan

EWS-1

SITE

DP-1

Offsite Lowpoint (Rear)

Drainage Diagram for Existing ConditionsPrepared by Engineering Alliance, Inc., Printed 3/10/2020

HydroCAD® 9.00 s/n 01924 © 2009 HydroCAD Software Solutions LLC

Subcat Reach Pond Link

Type III 24-hr 2-year Rainfall=3.10"Existing Conditions Printed 3/10/2020Prepared by Engineering Alliance, Inc.

Page 2HydroCAD® 9.00 s/n 01924 © 2009 HydroCAD Software Solutions LLC

Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 pointsRunoff by SCS TR-20 method, UH=SCS

Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method

Runoff Area=9,000 sf 30.09% Impervious Runoff Depth>1.67"Subcatchment EWS-1: SITE Tc=5.0 min CN=85 Runoff=0.41 cfs 1,254 cf

Inflow=0.41 cfs 1,254 cfReach DP-1: Offsite Lowpoint (Rear) Outflow=0.41 cfs 1,254 cf

Total Runoff Area = 9,000 sf Runoff Volume = 1,254 cf Average Runoff Depth = 1.67"69.91% Pervious = 6,292 sf 30.09% Impervious = 2,708 sf



Summary for Subcatchment EWS-1: SITE

Runoff = 0.41 cfs @ 12.08 hrs, Volume= 1,254 cf, Depth> 1.67"

Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrsType III 24-hr 2-year Rainfall=3.10"

Area (sf) CN Description2,226 98 Roofs, HSG C

* 270 98 Pool, HSG C* 212 98 Walkways, HSG C

6,292 79 50-75% Grass cover, Fair, HSG C9,000 85 Weighted Average6,292 69.91% Pervious Area2,708 30.09% Impervious Area

Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)

5.0 Direct Entry,

Subcatchment EWS-1: SITE

Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.440.42

0.40.380.360.340.32

0.30.280.260.240.22

0.20.180.160.140.12

0.10.080.060.040.02

0

Type III 24-hr 2-yearRainfall=3.10"Runoff Area=9,000 sfRunoff Volume=1,254 cfRunoff Depth>1.67"Tc=5.0 minCN=85

0.41 cfs



Summary for Reach DP-1: Offsite Lowpoint (Rear)

Inflow Area = 9,000 sf, 30.09% Impervious, Inflow Depth > 1.67" for 2-year eventInflow = 0.41 cfs @ 12.08 hrs, Volume= 1,254 cfOutflow = 0.41 cfs @ 12.08 hrs, Volume= 1,254 cf, Atten= 0%, Lag= 0.0 min

Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs

Reach DP-1: Offsite Lowpoint (Rear)

InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.440.42

0.40.380.360.340.32

0.30.280.260.240.22

0.20.180.160.140.12

0.10.080.060.040.02

0

Inflow Area=9,000 sf0.41 cfs

0.41 cfs










5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.8

0.75

0.7

0.65

0.6

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0


0.73 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.8

0.75

0.7

0.65

0.6

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0


0.73 cfs










5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


0.92 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


0.92 cfs










5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


1.20 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


1.20 cfs

E

W

N

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N/F GIUSEPPE COVIELLO 37 BOARDMAN STREET PARCEL ID: 0101736000

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14.96

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14.31

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14.49

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14.48

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14.40

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14.51

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14.24

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14.20

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14.69

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14.89

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14.52

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12.12

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13.12

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13.25

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12.69

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14.26

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13.51

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10.59

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10.99

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9.92

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10.00

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9.98

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10.01

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10.18

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10.06

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10.25

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11.68

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12.23

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14.68

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12.26

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12.76

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11.53

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11.73

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(PUBLIC-VARIABLE WIDTH)

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LOT AREA 9,000±S.F.

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N/F SALVAGGIO ENTERPRISES LLC 92 ASHLEY STREET PARCEL ID: 0101746001

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N/F GIUSEPPE COVIELLO 80 ASHLEY STREET PARCEL ID: 0101747000

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N/F CAROL SACCO 25 BOARDMAN STREET PARCEL ID: 0101733000

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N/F THE WHITBY STREET CONDOMINIUM 30 WHITBY STREET PARCEL ID: 0101749012

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N/F 33 BOARDMAN STREET PARCEL ID: 0101735000

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H

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Y

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D

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Exist. 12" Water Main NL PCI 1901 (1975)

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Exist. 36" Sewer Main (EAST BOSTON LOW LEVEL INTERCEPTOR)

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Exist. 36" Storm Drain

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D

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BOARDMAN STREET

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S

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Exist. 4" Gas Main

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WV

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WV

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Exist. SMH Inv.=-3.72

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Exist. DMH Inv.In=9.22 Inv.Out=9.20

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W

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S

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O

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W

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S

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O

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Existing Watershed Plan

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EWS

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PREPARED BY:

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PROJECT:

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DATE: March 10, 2020

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DWG FILE NAME: EWS.DWG

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CHECKED BY:Richard A. Salvo, P.E.

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DESIGN BY: Eric Bradanese, P.E.

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PROJECT #: 20-67702

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SCALE: As Noted

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OWNER / APPLICANT:

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DRAWING TITLE:

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DWG. NO.

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DESCRIPTION OF REVISION

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DATE

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0

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HORIZONTAL SCALE

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( IN FEET )

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%%UMagnolia Boardman LLC

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40 Warren Street

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Notice of Intent

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(Parcel ID: 0101734000 & 0101735000)

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31-33 Boardman Street

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10

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40

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20

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20

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1"=20'

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EWS-1 Area = 9,000 SF CN = 85 Tc = 5 min.

APPENDIX B

Proposed Conditions Drainage Calculations Proposed Watershed Plan

PWS-1

Existing & Proposed Building

PWS-2

Proposed Site

PWS-3

Proposed Landscaping

PWS-4

Lanscaped Area (Rear)

DP-1

Lynn Harbor

P1

Permeable Paver Stone Bed & Underdrains

P2

Landscape Depression

Drainage Diagram for Proposed ConditionsPrepared by Engineering Alliance, Inc., Printed 3/10/2020

HydroCAD® 9.00 s/n 01924 © 2009 HydroCAD Software Solutions LLC

Subcat Reach Pond Link

Type III 24-hr 2-year Rainfall=3.10"Proposed Conditions Printed 3/10/2020Prepared by Engineering Alliance, Inc.




Runoff Area=3,495 sf 100.00% Impervious Runoff Depth>2.87"Subcatchment PWS-1: Existing & Tc=5.0 min CN=98 Runoff=0.24 cfs 835 cf

Runoff Area=3,717 sf 66.40% Impervious Runoff Depth>2.07"Subcatchment PWS-2: Proposed Site Tc=5.0 min CN=90 Runoff=0.21 cfs 643 cf

Runoff Area=1,676 sf 0.00% Impervious Runoff Depth>0.97"Subcatchment PWS-3: Proposed Tc=5.0 min CN=74 Runoff=0.04 cfs 136 cf

Runoff Area=112 sf 0.00% Impervious Runoff Depth>0.97"Subcatchment PWS-4: Lanscaped Area (Rear) Tc=5.0 min CN=74 Runoff=0.00 cfs 9 cf

Inflow=0.00 cfs 9 cfReach DP-1: Lynn Harbor Outflow=0.00 cfs 9 cf

Peak Elev=6.83' Storage=562 cf Inflow=0.45 cfs 1,478 cfPond P1: Permeable Paver Stone Bed & Discarded=0.04 cfs 1,476 cf Primary=0.00 cfs 0 cf Outflow=0.04 cfs 1,476 cf

Peak Elev=7.59' Storage=35 cf Inflow=0.04 cfs 136 cfPond P2: Landscape Depression Outflow=0.01 cfs 135 cf




Summary for Subcatchment PWS-1: Existing & Proposed Building

Runoff = 0.24 cfs @ 12.07 hrs, Volume= 835 cf, Depth> 2.87"


Area (sf) CN Description3,495 98 Roofs, HSG C3,495 100.00% Impervious Area


5.0 Direct Entry,

Subcatchment PWS-1: Existing & Proposed Building

Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.26

0.24

0.22

0.2

0.18

0.16

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0

Type III 24-hr 2-yearRainfall=3.10"Runoff Area=3,495 sfRunoff Volume=835 cfRunoff Depth>2.87"Tc=5.0 minCN=98

0.24 cfs



Summary for Subcatchment PWS-2: Proposed Site



Area (sf) CN Description* 1,550 98 Paver Driveway, HSG C* 581 98 Bituminous Driveway, HSG C* 337 98 Walkways, HSG C

1,249 74 >75% Grass cover, Good, HSG C3,717 90 Weighted Average1,249 33.60% Pervious Area2,468 66.40% Impervious Area


5.0 Direct Entry,

Subcatchment PWS-2: Proposed Site

Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.230.220.21

0.20.190.180.170.160.150.140.130.120.11

0.10.090.080.070.060.050.040.030.020.01

0


0.21 cfs



Summary for Subcatchment PWS-3: Proposed Landscaping



Area (sf) CN Description1,676 74 >75% Grass cover, Good, HSG C1,676 100.00% Pervious Area


5.0 Direct Entry,

Subcatchment PWS-3: Proposed Landscaping

Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.0460.0440.042

0.040.0380.0360.0340.032

0.030.0280.0260.0240.022

0.020.0180.0160.0140.012

0.010.0080.0060.0040.002

0


0.04 cfs



Summary for Subcatchment PWS-4: Lanscaped Area (Rear)



Area (sf) CN Description112 74 >75% Grass cover, Good, HSG C112 100.00% Pervious Area


5.0 Direct Entry,

Subcatchment PWS-4: Lanscaped Area (Rear)

Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.003

0.003

0.003

0.002

0.002

0.002

0.002

0.002

0.001

0.001

0.001

0.001

0.001

0.000

0.000

0

Type III 24-hr 2-yearRainfall=3.10"Runoff Area=112 sfRunoff Volume=9 cfRunoff Depth>0.97"Tc=5.0 minCN=74

0.00 cfs



Summary for Reach DP-1: Lynn Harbor

Inflow Area = 9,000 sf, 66.26% Impervious, Inflow Depth > 0.01" for 2-year eventInflow = 0.00 cfs @ 12.09 hrs, Volume= 9 cfOutflow = 0.00 cfs @ 12.09 hrs, Volume= 9 cf, Atten= 0%, Lag= 0.0 min


Reach DP-1: Lynn Harbor

InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.003

0.003

0.003

0.002

0.002

0.002

0.002

0.002

0.001

0.001

0.001

0.001

0.001

0.000

0.000

0


0.00 cfs



Summary for Pond P1: Permeable Paver Stone Bed & Underdrains

Inflow Area = 7,212 sf, 82.68% Impervious, Inflow Depth > 2.46" for 2-year eventInflow = 0.45 cfs @ 12.07 hrs, Volume= 1,478 cfOutflow = 0.04 cfs @ 11.40 hrs, Volume= 1,476 cf, Atten= 92%, Lag= 0.0 minDiscarded = 0.04 cfs @ 11.40 hrs, Volume= 1,476 cfPrimary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf

Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs / 2Peak Elev= 6.83' @ 13.06 hrs Surf.Area= 1,550 sf Storage= 562 cf

Plug-Flow detention time= 119.6 min calculated for 1,476 cf (100% of inflow)Center-of-Mass det. time= 118.9 min ( 896.9 - 778.0 )

Volume Invert Avail.Storage Storage Description#1 6.00' 845 cf Custom Stage Data (Prismatic) Listed below (Recalc)

3,100 cf Overall - 283 cf Embedded = 2,817 cf x 30.0% Voids#2 6.00' 283 cf 12.0" D x 60.0'L Pipe Storage x 6 Inside #1

1,128 cf Total Available Storage

Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)6.00 1,550 0 08.00 1,550 3,100 3,100

Device Routing Invert Outlet Devices#1 Discarded 6.00' 1.020 in/hr Exfiltration over Surface area #2 Primary 7.75' 6.0' long x 1.0' breadth Broad-Crested Rectangular Weir

Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32

Discarded OutFlow Max=0.04 cfs @ 11.40 hrs HW=6.02' (Free Discharge)1=Exfiltration (Exfiltration Controls 0.04 cfs)

Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=6.00' (Free Discharge)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)



Pond P1: Permeable Paver Stone Bed & Underdrains

InflowOutflowDiscardedPrimary

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0

Inflow Area=7,212 sfPeak Elev=6.83'Storage=562 cf

0.45 cfs

0.04 cfs0.04 cfs

0.00 cfs



Summary for Pond P2: Landscape Depression

Inflow Area = 8,888 sf, 67.09% Impervious, Inflow Depth > 0.18" for 2-year eventInflow = 0.04 cfs @ 12.09 hrs, Volume= 136 cfOutflow = 0.01 cfs @ 12.54 hrs, Volume= 135 cf, Atten= 77%, Lag= 27.1 minDiscarded = 0.01 cfs @ 12.54 hrs, Volume= 135 cf

Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs / 2Peak Elev= 7.59' @ 12.54 hrs Surf.Area= 400 sf Storage= 35 cf

Plug-Flow detention time= 28.3 min calculated for 135 cf (100% of inflow)Center-of-Mass det. time= 26.6 min ( 889.2 - 862.6 )

Volume Invert Avail.Storage Storage Description#1 7.50' 1,736 cf Custom Stage Data (Prismatic) Listed below (Recalc)

Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)7.50 340 0 08.00 660 250 2509.00 2,312 1,486 1,736

Device Routing Invert Outlet Devices#1 Discarded 7.50' 1.020 in/hr Exfiltration over Surface area




Pond P2: Landscape Depression

InflowDiscarded

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.0460.0440.042

0.040.0380.0360.0340.032

0.030.0280.0260.0240.022

0.020.0180.0160.0140.012

0.010.0080.0060.0040.002

0


0.04 cfs

0.01 cfs





Runoff Area=3,495 sf 100.00% Impervious Runoff Depth>4.36"Subcatchment PWS-1: Existing & Tc=5.0 min CN=98 Runoff=0.36 cfs 1,270 cf

Runoff Area=3,717 sf 66.40% Impervious Runoff Depth>3.49"Subcatchment PWS-2: Proposed Site Tc=5.0 min CN=90 Runoff=0.34 cfs 1,081 cf




Peak Elev=7.76' Storage=1,018 cf Inflow=0.70 cfs 2,351 cfPond P1: Permeable Paver Stone Bed & Discarded=0.04 cfs 2,089 cf Primary=0.03 cfs 53 cf Outflow=0.06 cfs 2,142 cf










5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.4

0.38

0.36

0.34

0.32

0.3

0.28

0.26

0.24

0.22

0.2

0.18

0.16

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0


0.36 cfs









5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.38

0.36

0.34

0.32

0.3

0.28

0.26

0.24

0.22

0.2

0.18

0.16

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0


0.34 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.1

0.095

0.09

0.085

0.08

0.075

0.07

0.065

0.06

0.055

0.05

0.045

0.04

0.035

0.03

0.025

0.02

0.015

0.01

0.005

0


0.09 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.007

0.006

0.005

0.005

0.004

0.004

0.003

0.003

0.002

0.002

0.001

0.001

0.000

0


0.01 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.007

0.006

0.005

0.005

0.004

0.004

0.003

0.003

0.002

0.002

0.001

0.001

0.000

0


0.01 cfs





Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs / 2Peak Elev= 7.76' @ 12.97 hrs Surf.Area= 1,550 sf Storage= 1,018 cf









Primary OutFlow Max=0.02 cfs @ 12.97 hrs HW=7.76' (Free Discharge)2=Broad-Crested Rectangular Weir (Weir Controls 0.02 cfs @ 0.30 fps)





Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.75

0.7

0.65

0.6

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0

Inflow Area=7,212 sfPeak Elev=7.76'Storage=1,018 cf

0.70 cfs

0.06 cfs

0.04 cfs0.03 cfs





Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs / 2Peak Elev= 7.81' @ 13.82 hrs Surf.Area= 541 sf Storage= 138 cf

Plug-Flow detention time= 106.0 min calculated for 338 cf (100% of inflow)Center-of-Mass det. time= 104.5 min ( 938.0 - 833.5 )








InflowDiscarded

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.1

0.095

0.09

0.085

0.08

0.075

0.070.065

0.06

0.055

0.05

0.045

0.04

0.035

0.03

0.0250.02

0.015

0.01

0.005

0


0.09 cfs

0.01 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.480.460.440.42

0.40.380.360.340.32

0.30.280.260.240.22

0.20.180.160.140.12

0.10.080.060.040.02

0


0.43 cfs









5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.460.440.42

0.40.380.360.340.32

0.30.280.260.240.22

0.20.180.160.140.12

0.10.080.060.040.02

0


0.42 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.13

0.12

0.11

0.1

0.09

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0


0.12 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.009

0.009

0.008

0.007

0.007

0.006

0.006

0.005

0.005

0.004

0.004

0.003

0.003

0.002

0.002

0.001

0.001

0.000

0


0.01 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.009

0.009

0.008

0.007

0.007

0.006

0.006

0.005

0.005

0.004

0.004

0.003

0.003

0.002

0.002

0.001

0.001

0.000

0


0.01 cfs





Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.950.9

0.850.8

0.75

0.70.65

0.60.55

0.5

0.450.4

0.350.3

0.25

0.20.15

0.10.05

0


0.86 cfs

0.33 cfs

0.04 cfs

0.30 cfs






Plug-Flow detention time= 228.9 min calculated for 758 cf (97% of inflow)Center-of-Mass det. time= 210.6 min ( 1,008.1 - 797.5 )








InflowDiscarded

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.38

0.36

0.34

0.32

0.3

0.28

0.26

0.24

0.22

0.2

0.18

0.16

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0


0.35 cfs

0.03 cfs











Peak Elev=8.61' Storage=958 cf Inflow=0.92 cfs 1,471 cfPond P2: Landscape Depression Outflow=0.04 cfs 1,273 cf









5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.6

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0


0.54 cfs









5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0


0.54 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.19

0.18

0.17

0.16

0.15

0.14

0.13

0.12

0.11

0.1

0.09

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0


0.17 cfs








5.0 Direct Entry,


Runoff

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.0130.0130.0120.0110.011

0.010.01

0.0090.0090.0080.0080.0070.0070.0060.0060.0050.0050.0040.0040.0030.0030.0020.0020.0010.0010.000

0


0.01 cfs







InflowOutflow

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

0.013

0.012

0.011

0.01

0.009

0.008

0.007

0.006

0.005

0.004

0.003

0.002

0.001

0


0.01 cfs





Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


1.07 cfs

0.84 cfs

0.04 cfs

0.81 cfs




Inflow Area = 8,888 sf, 67.09% Impervious, Inflow Depth > 1.99" for 100-year eventInflow = 0.92 cfs @ 12.16 hrs, Volume= 1,471 cfOutflow = 0.04 cfs @ 13.78 hrs, Volume= 1,273 cf, Atten= 96%, Lag= 96.8 minDiscarded = 0.04 cfs @ 13.78 hrs, Volume= 1,273 cf


Plug-Flow detention time= 265.8 min calculated for 1,273 cf (86% of inflow)Center-of-Mass det. time= 229.2 min ( 1,010.9 - 781.7 )








InflowDiscarded

Hydrograph

Time (hours)2423222120191817161514131211109876543210

Flo

w (

cfs)

1

0


0.92 cfs

0.04 cfs

E

W

N

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14.96

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14.31

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14.49

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14.48

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14.40

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14.51

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14.24

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14.20

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14.69

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14.89

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14.52

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12.12

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13.12

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13.25

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12.69

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14.26

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13.51

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10.59

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10.99

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9.92

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10.00

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9.98

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10.01

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10.18

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10.06

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10.25

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11.68

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12.23

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14.68

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12.26

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12.76

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11.53

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11.73

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90.00'

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90.00'

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100.00'

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100.00'

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PROP. 3 STORY 3 FAMILY ADDITION NO. 31A BOARDMAN F.F.E.=16.75 BASEMENT/GARAGE ELEV.=8.75

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PROPOSED #33 BOARDMAN

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LIGHT WELL

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LIGHT WELL

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LOT LINE TO BE REMOVED

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H

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Y

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D

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D

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BOARDMAN STREET

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S

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Exist. 4" Gas Main

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WV

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WV

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W

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S

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O

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W

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S

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O

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PROP. CONC. RAMP

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REMOVE EXIST. SHED

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REMOVE EXIST. POOL

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REMOVE EXIST. STAIRS & LANDING

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PROP. CURB CUT 14.00'

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10.00'

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10.00'

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12.83'

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8.00

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7.75

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8.75

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MEET EXIST. GRADE ALONG PROPERTY LINE

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INV.@BLD=6.25

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CLOSE EXIST.

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CURB CUT

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LIMIT OF PUBLIC EXCAVATION (WATER&FIRE)(4'x19')

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CUT & CAP EXIST. WATER SERVICE (33 BOARDMAN) (5'x5')

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LIMIT OF PUBLIC EXCAVATION (SEWER)(4'x28')

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PROP. 6" PVC (SDR-35) SEWER SERVICE PROP. INV. AT CHIMNEY=5.51 PROP. INV. AT MAIN=-1.24 Exist. Inv. at Main=-3.74

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PROP. BITUMINOUS CONCRETE DRIVEWAY

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PROP. 2" TYPE "K" COPPER DOMESTIC WATER SERVICE WITH SIDEWALK COCK, CORPORATION STOP, & 1" WATER METER

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PROP. 4" CLDI (CLASS 56, ZINC COATED) FIRE SERVICE WITH TAPPING SLEEVE & GATE VALVE

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PROP. 1" WATER METER LOCATION

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PROP. SEWER CLEANOUT

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PROP. PERVIOUS PAVER DRIVEWAY & PARKING AREA

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PROP. DOWNSPOUT (TYP.) INV.=10.20

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REMOVE PORTION OF EXIST. BUILDING

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REMOVE EXIST. DECK

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PROP. 6" PERFORATED P.E. ADS PIPE IN CRUSHED STONE BED (SEE DOWNSPOUT DISCHARGE/PERMEABLE PAVER DETAIL SHEET 2of2) INV.=6.50

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4" PVC ROOF DRAIN LINE

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8.95

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RETAIN EXIST. SEWER SERVICE (29 BOARDMAN)

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14

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13

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12

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11

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10

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9

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9

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10

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9

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BOT. OF DEPRESSION ELEV.=7.50

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8

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(6) 60 L.F. 12" PERFORATED P.E. ADS PIPE EMBEDDED IN PAVER STONE BEDDING INV.=6.00

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8

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REMOVE EXIST. SIDEWALK BOX (5'x5')

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INV.=6.60

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INV.=6.60

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INV.=10.20

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10

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PROP. DOUBLE STAKED HAYBALES & SILTATION FENCE

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14' WIDE OVERHEAD GARAGE DOOR W/ BREAKAWAY BOTTOM PANEL (21"x168")

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8.75

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8.75

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8.75

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8

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Proposed Watershed Plan

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PWS

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PREPARED BY:

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PROJECT:

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DATE: March 10, 2020

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DWG FILE NAME: PWS.DWG

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CHECKED BY:Richard A. Salvo, P.E.

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DESIGN BY: Eric Bradanese, P.E.

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PROJECT #: 20-67702

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SCALE: As Noted

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OWNER / APPLICANT:

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DRAWING TITLE:

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DWG. NO.

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DATE

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0

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HORIZONTAL SCALE

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( IN FEET )

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40 Warren Street

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Notice of Intent

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(Parcel ID: 0101734000 & 0101735000)

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31-33 Boardman Street

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PWS-4 Area = 112 SF CN = 74 Tc = 5 min.

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1"=20'

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20

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20

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40

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10

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PWS-3 Area = 1,676 SF CN = 74 Tc = 5 min.

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SECTION IV

Wetland Fee Transmittal Form Copy of Checks

noifeetf.doc • Wetland Fee Transmittal Form • rev. 10/11 Page 1 of 2


NOI Wetland Fee Transmittal Form Massachusetts Wetlands Protection Act M.G.L. c. 131, §40

Important: When filling out forms on the computer, use only the tab key to move your cursor - do not use the return key.

A. Applicant Information

1. Location of Project:

31-33 Boardman Street a. Street Address

East Boston b. City/Town

19148 c. Check number

$512.50 d. Fee amount

2. Applicant Mailing Address:

Vahid a. First Name

Nickpour b. Last Name

Magnolia Boardman LLC c. Organization

40 Warren Street d. Mailing Address

Charlestown e. City/Town

MA f. State

02129 g. Zip Code

(617) 799-8482 h. Phone Number

i. Fax Number

[email protected] j. Email Address

3. Property Owner (if different):

a. First Name

b. Last Name

c. Organization

d. Mailing Address

e. City/Town

f. State

g. Zip Code

h. Phone Number

i. Fax Number

j. Email Address

To calculate filing fees, refer to the category fee list and examples in the instructions for filling out WPA Form 3 (Notice of Intent).

B. Fees

Fee should be calculated using the following process & worksheet. Please see Instructions before filling out worksheet. Step 1/Type of Activity: Describe each type of activity that will occur in wetland resource area and buffer zone. Step 2/Number of Activities: Identify the number of each type of activity. Step 3/Individual Activity Fee: Identify each activity fee from the six project categories listed in the instructions. Step 4/Subtotal Activity Fee: Multiply the number of activities (identified in Step 2) times the fee per category (identified in Step 3) to reach a subtotal fee amount. Note: If any of these activities are in a Riverfront Area in addition to another Resource Area or the Buffer Zone, the fee per activity should be multiplied by 1.5 and then added to the subtotal amount. Step 5/Total Project Fee: Determine the total project fee by adding the subtotal amounts from Step 4. Step 6/Fee Payments: To calculate the state share of the fee, divide the total fee in half and subtract $12.50. To calculate the city/town share of the fee, divide the total fee in half and add $12.50.

noifeetf.doc • Wetland Fee Transmittal Form • rev. 10/11 Page 2 of 2


NOI Wetland Fee Transmittal Form Massachusetts Wetlands Protection Act M.G.L. c. 131, §40

B. Fees (continued)

Step 1/Type of Activity Step 2/Number of Activities

Step 3/Individual Activity Fee

Step 4/Subtotal Activity Fee

Category 3: Each building (for development) including site

1

$1,050.00

$1,050.00

Step 5/Total Project Fee: $1,050.00

Step 6/Fee Payments:

Total Project Fee:

$1,050.00 a. Total Fee from Step 5

State share of filing Fee: $512.50 b. 1/2 Total Fee less $12.50

City/Town share of filling Fee: N/A c. 1/2 Total Fee plus $12.50

C. Submittal Requirements

a.) Complete pages 1 and 2 and send with a check or money order for the state share of the fee, payable to the Commonwealth of Massachusetts.

Department of Environmental Protection

Box 4062 Boston, MA 02211

b.) To the Conservation Commission: Send the Notice of Intent or Abbreviated Notice of Intent; a copy of

this form; and the city/town fee payment.

To MassDEP Regional Office (see Instructions): Send a copy of the Notice of Intent or Abbreviated Notice of Intent; a copy of this form; and a copy of the state fee payment. (E-filers of Notices of Intent may submit these electronically.)

SECTION V

Affidavit of Service Abutter Notification Form

Certified Abutters List

Notification to Abutters Under the Massachusetts Wetlands Protection Act

In accordance with the second paragraph of Massachusetts General Laws Chapter 131, Section 40, you are hereby notified of the following. A. The name of the applicant is Nova Realty Trust B. The applicant has filed a Notice of Intent with the Conservation Commission for the

City of Boston seeking permission to remove, fill, dredge or alter an Area Subject to Protection Under the Wetlands Protection Act (General Laws Chapter 131, Section 40).

C. The address of the lot where the activity is proposed is 31-33 Boardman Street (Parcel ID:

0101734000 & 0101735000) East Boston, MA. D. Copies of the Notice of Intent may be examined at: City of Boston Conservation Commission 1 City Hall Square, Room 709 Boston, MA 02201-2031

between the hours of 8:30 A.M. and 5:00 P.M. on the following days of the week: Monday, through Friday. For more information or an appointment call: (617) 635-3850. This is the number for the City of Boston Environment Department.

E. Copies of the Notice of Intent may be obtained from the applicant’s representative, by calling this

telephone number (781) 231-1349 between the hours of 8:30 A.M. and 5:00 P.M. on the following days of the week: Monday through Friday.

F. A public hearing will be held virtually on Wednesday, May 6, 2020 at 6 p.m. by the Boston

Conservation Commission. You may participate in the meeting by going to https://zoom.us/j/6864582044 and using your computer’s audio or microphone. If you are unable to connect audio or do not have access to a computer, you can call 1-929-205-6099, enter Meeting ID 686 458 2044 # and your participant ID provided when logging into Zoom.

NOTE: Notice of the public hearing, including its date, time and place will be published at least five (5) days in advance in the Boston Herald. NOTE: You may also contact your local conservation commission or the nearest Department of Environmental Protection Regional Office for more information about this application or the Wetlands Protection Act. To contact DEP, call: Central Region: (508) 792-7650 Northeast Region: (978) 661-7600 Southeast Region: (508) 946-2800 Western Region: (413) 784-1100

PID OWNER ADDRESSEE MLG_ADDRESS MLG_CITYSTATE MLG_ZIPCODE LOC_ADDRESS LOC_CITY LOC_ZIPCODE100524000 CITY OF BOSTON CITY OF BOSTON BOARDMAN EAST BOSTON MA 2128 BOARDMAN ST EAST BOSTON 2128100525000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 BOARDMAN ST EAST BOSTON 2128100526000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 16 BOARDMAN ST EAST BOSTON 2128100527000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 BOARDMAN ST EAST BOSTON 2128100528000 KATZ ROBERT J KATZ ROBERT J 1 BOARDMAN ST EAST BOSTON MA 2128 970 SARATOGA ST EAST BOSTON 2128100529000 TAN NENG HAI TAN NENG HAI 964 SARATOGA ST EAST BOSTON MA 2128 964 SARATOGA ST EAST BOSTON 2128100530000 BURRI STEVEN M BURRI STEVEN M 960 SARATOGA ST EAST BOSTON MA 2128 960 962 SARATOGA ST EAST BOSTON 2128100531000 JANOUDI RABEH JANOUDI RABEH 958 SARATOGA ST EAST BOSTON MA 2128 958 SARATOGA ST EAST BOSTON 2128100532000 ORIENT HGTS CIVIC CLUB ORIENT HGTS CIVIC CLUB 956 SARATOGA EAST BOSTON MA 2128 956 SARATOGA ST EAST BOSTON 2128100533000 CB EQUITIES SARATOGA STREET CB EQUITIES SARATOGA STREET 6 VELMA RD WAKEFIELD MA 1880 944 946 SARATOGA ST EAST BOSTON 2128101725000 MARTINEZ MARIA MARTINEZ MARIA 4 FORD ST E BOSTON MA 2128 4 FORD ST EAST BOSTON 2128101726000 KATZ ROBERT J KATZ ROBERT J 1 BOARDMAN ST EAST BOSTON MA 2128 2 FORD ST EAST BOSTON 2128101727000 KATZ ROBERT J KATZ ROBERT J 1 BOARDMAN ST EAST BOSTON MA 2128 7 BOARDMAN ST EAST BOSTON 2128101728000 PORFIDO STEPHEN W PORFIDO STEPHEN W 9 BOARDMAN ST E BOSTON MA 2128 9 BOARDMAN ST EAST BOSTON 2128101729000 JACOBSON DANIEL E JACOBSON DANIEL E 2 BRIGHAM ST UNIT 3 BOSTON MA 2128 11 BOARDMAN ST EAST BOSTON 2128101730000 DONIS FERNANDO U DONIS FERNANDO U 15 BOARDMAN ST EAST BOSTON MA 2128 15 BOARDMAN ST EAST BOSTON 2128101731000 GONZALEZ MARVIN E GONZALEZ MARVIN E 483 POPLAR ST ROSLINDALE MA 2131 19 BOARDMAN ST EAST BOSTON 2128101732000 RAFFO JOHN * GEORGE ETAL RAFFO JOHN * GEORGE ETAL 23 BOARDMAN ST EAST BOSTON MA 2128 23 BOARDMAN ST EAST BOSTON 2128101733000 SACCO CAROL A SACCO CAROL A 25 BOARDMAN ST E BOSTON MA 2128 25 BOARDMAN ST EAST BOSTON 2128101734000 PINEDA OMAR PINEDA OMAR 29 BOARDMAN ST E BOSTON MA 2128 29 BOARDMAN ST EAST BOSTON 2128101735000 CERULLO YOLANDA CERULLO YOLANDA 146 BUNKER HILL ST CHARLESTOWN MA 2129 33 BOARDMAN ST EAST BOSTON 2128101736000 COVIELLO GIUSEPPE COVIELLO GIUSEPPE 37 BOARDMAN ST E BOSTON MA 2128 37 BOARDMAN ST EAST BOSTON 2128101737000 41 BOARDMAN STREET 41 BOARDMAN STREET 41 BOARDMAN ST EAST BOSTON MA 2128 41 BOARDMAN ST EAST BOSTON 2128101737002 FAIZ ANDREW G FAIZ ANDREW G 41 BOARDMAN ST #1 EAST BOSTON MA 2128 41 BOARDMAN ST #1 EAST BOSTON 2128101737004 MACHAFFIE JENNIFER MACHAFFIE JENNIFER 41 BOARDMAN ST #2 EAST BOSTON MA 2128 41 BOARDMAN ST #2 EAST BOSTON 2128101739000 PAGNANI JOHN E PAGNANI JOHN E 47 BOARDMAN ST EAST BOSTON MA 2128 47 BOARDMAN ST EAST BOSTON 2128101740000 VETTER BRITTANY E VETTER BRITTANY E 19 ORANGE ST CHELSEA MA 2150 49 BOARDMAN ST EAST BOSTON 2128101741000 ADRIANO REALTY TRUST ADRIANO REALTY TRUST 53 BOARDMAN ST EAST BOSTON MA 2128 53 BOARDMAN ST EAST BOSTON 2128101742000 SCHETTINO JOHN A SCHETTINO JOHN A 8 PAINE ST WINTHROP MA 2152 BOARDMAN ST EAST BOSTON 2128101745000 CIANO ANNA CIANO ANNA 100 ASHLEY ST EAST BOSTON MA 2128 100 ASHLEY ST EAST BOSTON 2128101746001 COVIELLO GIUSEPPE COVIELLO GIUSEPPE 37 BOARDMAN ST EAST BOSTON MA 2128 92 ASHLEY ST EAST BOSTON 2128101747000 DELEO ROBERT DELEO ROBERT 80 ASHLEY ST EAST BOSTON MA 2128 ASHLEY ST EAST BOSTON 2128101748000 DELEO DEBORAH TS DELEO DEBORAH TS 80 ASHLEY ST E BOSTON MA 2128 WHITBY ST EAST BOSTON 2128101749000 WHITBY STREET CONDO TR WHITBY STREET CONDO TR 36 WHITBY ST EAST BOSTON MA 2128 40 30 WHITBY ST EAST BOSTON 2128101749002 DISESSA JOSEPH M DISESSA JOSEPH M 40 WHITBY ST #40 EAST BOSTON MA 2128 40 WHITBY ST #40 EAST BOSTON 2128101749004 TAYLOR SUSAN J TAYLOR SUSAN J 38 WHITBY ST #38 EAST BOSTON MA 2128 38 WHITBY ST #38 EAST BOSTON 2128101749006 ZHEN JIEYA ZHEN JIEYA 36 WHITBY ST EAST BOSTON MA 2128 36 WHITBY ST #36 EAST BOSTON 2128101749008 DIROCCO MARY ANN DIROCCO MARY ANN 34 WHITBY ST #34 E BOSTON MA 2128 34 WHITBY ST #34 EAST BOSTON 2128101749010 PIZZARO RAMIRO PIZZARO RAMIRO 32 WHITBY ST #32 E BOSTON MA 2128 32 WHITBY ST #32 EAST BOSTON 2128101749012 ACONE LYNNETTE GARCIA ACONE LYNNETTE GARCIA 30 WHITBY ST #30 E BOSTON MA 2128 30 WHITBY ST #30 EAST BOSTON 2128101752000 TUPAY ROSEMARIE TUPAY ROSEMARIE 15 CYPRESS ST STE 301 NEWTON MA 2459 WHITBY ST EAST BOSTON 2128101753000 TUPAY ROSEMARIE TUPAY ROSEMARIE 15 CYPRESS ST STE 301 NEWTON MA 2459 16 WHITBY ST EAST BOSTON 2128101754000 CALLEJAS JOSE A CALLEJAS JOSE A 444 SUMNER ST EAST BOSTON MA 2128 12 WHITBY ST EAST BOSTON 2128101755000 HERNANDEZ OSCAR A HERNANDEZ OSCAR A 10 WHITBY ST E BOSTON MA 2128 10 WHITBY ST EAST BOSTON 2128101761000 ROMAN CATH ARCH OF BOS ROMAN CATH ARCH OF BOS 59 ASHLEY ST EAST BOSTON MA 2128 WHITBY ST EAST BOSTON 2128101762000 DESA PATRICE M DESA PATRICE M 21 WHITBY ST EAST BOSTON MA 2128 21 WHITBY ST EAST BOSTON 2128101763000 GUARINO VINCENZO M ETAL GUARINO VINCENZO M ETAL 70 ASHLEY EAST BOSTON MA 2128 70 ASHLEY ST EAST BOSTON 2128101764000 ROMAN CATH ARCH BOSTON ROMAN CATH ARCH BOSTON 54 ASHLEY EAST BOSTON MA 2128 54 ASHLEY ST EAST BOSTON 2128101774000 ROMAN CATH ARCH OF BOS ROMAN CATH ARCH OF BOS 61 ASHLEY EAST BOSTON MA 2128 61 ASHLEY ST EAST BOSTON 2128101775000 ROMAN CATH ARCH OF BOS ROMAN CATH ARCH OF BOS 67 ASHLEY EAST BOSTON MA 2128 67 ASHLEY ST EAST BOSTON 2128101777000 ENRIQUE ANTONIO M ENRIQUE ANTONIO M 87 ASHLEY EAST BOSTON MA 2128 87 ASHLEY ST EAST BOSTON 2128101778000 APARECIDO FAMILY TRUST APARECIDO FAMILY TRUST 91 ASHLEY ST EAST BOSTON MA 2128 91 ASHLEY ST EAST BOSTON 2128101779000 MAZZARELLA MARIA A MAZZARELLA MARIA A 95 ASHLEY ST EAST BOSTON MA 2128 95 ASHLEY ST EAST BOSTON 2128101780000 MADRIGAL ALBA MADRIGAL ALBA 99 ASHLEY ST EAST BOSTON MA 2128 99 ASHLEY ST EAST BOSTON 2128101781000 FERNANDES ELIZANDRA FERNANDES ELIZANDRA 101 ASHLEY ST E BOSTON MA 2128 101 ASHLEY ST EAST BOSTON 2128101782000 CUASCUT OMAR CUASCUT OMAR 105 ASHLEY ST EAST BOSTON MA 2128 105 ASHLEY ST EAST BOSTON 2128101783000 VELASQUEZ ROSANGELA VELASQUEZ ROSANGELA 16 HYDE STREET NEWTON MA 2461 109 ASHLEY ST EAST BOSTON 2128101813000 WHEELER ADAM WHEELER ADAM 91 LEYDEN ST EAST BOSTON MA 2128 91 LEYDEN ST EAST BOSTON 2128101814000 SCARFO DAMIARO ETAL SCARFO DAMIARO ETAL 104 LAKE SHORE RD BOXFORD MA 1921 93 LEYDEN ST EAST BOSTON 2128101815000 MAZZARELLA MARIA A MAZZARELLA MARIA A 101 LEYDEN ST EAST BOSTON MA 2128 101 LEYDEN ST EAST BOSTON 2128101816000 LEYDEN REALTY TRUST LEYDEN REALTY TRUST 3 MORENO DR WOBURN MA 1801 103 105 LEYDEN ST EAST BOSTON 2128101817000 ZAWASKI RICHARD L ETAL ZAWASKI RICHARD L ETAL 109 LEYDEN EAST BOSTON MA 2128 109 LEYDEN ST EAST BOSTON 2128101818000 CONTRERAS BORIS CONTRERAS BORIS 113 LEYDEN ST EAST BOSTON MA 2128 113 LEYDEN ST EAST BOSTON 2128

PID OWNER ADDRESSEE MLG_ADDRESS MLG_CITYSTATE MLG_ZIPCODE LOC_ADDRESS LOC_CITY LOC_ZIPCODE100524000 CITY OF BOSTON CITY OF BOSTON BOARDMAN EAST BOSTON MA 2128 BOARDMAN ST EAST BOSTON 2128100525000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 BOARDMAN ST EAST BOSTON 2128100526000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 16 BOARDMAN ST EAST BOSTON 2128100527000 BOARDMAN HOLDINGS LLC BOARDMAN HOLDINGS LLC 6 BENNETT ST CAMBRIDGE MA 2138 BOARDMAN ST EAST BOSTON 2128100528000 KATZ ROBERT J KATZ ROBERT J 1 BOARDMAN ST EAST BOSTON MA 2128 970 SARATOGA ST EAST BOSTON 2128100531000 JANOUDI RABEH JANOUDI RABEH 958 SARATOGA ST EAST BOSTON MA 2128 958 SARATOGA ST EAST BOSTON 2128100532000 ORIENT HGTS CIVIC CLUB ORIENT HGTS CIVIC CLUB 956 SARATOGA EAST BOSTON MA 2128 956 SARATOGA ST EAST BOSTON 2128101728000 PORFIDO STEPHEN W PORFIDO STEPHEN W 9 BOARDMAN ST E BOSTON MA 2128 9 BOARDMAN ST EAST BOSTON 2128101729000 JACOBSON DANIEL E JACOBSON DANIEL E 2 BRIGHAM ST UNIT 3 BOSTON MA 2128 11 BOARDMAN ST EAST BOSTON 2128101730000 DONIS FERNANDO U DONIS FERNANDO U 15 BOARDMAN ST EAST BOSTON MA 2128 15 BOARDMAN ST EAST BOSTON 2128101731000 GONZALEZ MARVIN E GONZALEZ MARVIN E 483 POPLAR ST ROSLINDALE MA 2131 19 BOARDMAN ST EAST BOSTON 2128101732000 RAFFO JOHN * GEORGE ETAL RAFFO JOHN * GEORGE ETAL 23 BOARDMAN ST EAST BOSTON MA 2128 23 BOARDMAN ST EAST BOSTON 2128101733000 SACCO CAROL A SACCO CAROL A 25 BOARDMAN ST E BOSTON MA 2128 25 BOARDMAN ST EAST BOSTON 2128101734000 PINEDA OMAR PINEDA OMAR 29 BOARDMAN ST E BOSTON MA 2128 29 BOARDMAN ST EAST BOSTON 2128101735000 CERULLO YOLANDA CERULLO YOLANDA 146 BUNKER HILL ST CHARLESTOWN MA 2129 33 BOARDMAN ST EAST BOSTON 2128101736000 COVIELLO GIUSEPPE COVIELLO GIUSEPPE 37 BOARDMAN ST E BOSTON MA 2128 37 BOARDMAN ST EAST BOSTON 2128101737000 41 BOARDMAN STREET 41 BOARDMAN STREET 41 BOARDMAN ST EAST BOSTON MA 2128 41 BOARDMAN ST EAST BOSTON 2128101737002 FAIZ ANDREW G FAIZ ANDREW G 41 BOARDMAN ST #1 EAST BOSTON MA 2128 41 BOARDMAN ST #1 EAST BOSTON 2128101737004 MACHAFFIE JENNIFER MACHAFFIE JENNIFER 41 BOARDMAN ST #2 EAST BOSTON MA 2128 41 BOARDMAN ST #2 EAST BOSTON 2128101739000 PAGNANI JOHN E PAGNANI JOHN E 47 BOARDMAN ST EAST BOSTON MA 2128 47 BOARDMAN ST EAST BOSTON 2128101740000 VETTER BRITTANY E VETTER BRITTANY E 19 ORANGE ST CHELSEA MA 2150 49 BOARDMAN ST EAST BOSTON 2128101741000 ADRIANO REALTY TRUST ADRIANO REALTY TRUST 53 BOARDMAN ST EAST BOSTON MA 2128 53 BOARDMAN ST EAST BOSTON 2128101742000 SCHETTINO JOHN A SCHETTINO JOHN A 8 PAINE ST WINTHROP MA 2152 BOARDMAN ST EAST BOSTON 2128101745000 CIANO ANNA CIANO ANNA 100 ASHLEY ST EAST BOSTON MA 2128 100 ASHLEY ST EAST BOSTON 2128101746001 COVIELLO GIUSEPPE COVIELLO GIUSEPPE 37 BOARDMAN ST EAST BOSTON MA 2128 92 ASHLEY ST EAST BOSTON 2128101747000 DELEO ROBERT DELEO ROBERT 80 ASHLEY ST EAST BOSTON MA 2128 ASHLEY ST EAST BOSTON 2128101748000 DELEO DEBORAH TS DELEO DEBORAH TS 80 ASHLEY ST E BOSTON MA 2128 WHITBY ST EAST BOSTON 2128101749000 WHITBY STREET CONDO TR WHITBY STREET CONDO TR 36 WHITBY ST EAST BOSTON MA 2128 40 30 WHITBY ST EAST BOSTON 2128101749002 DISESSA JOSEPH M DISESSA JOSEPH M 40 WHITBY ST #40 EAST BOSTON MA 2128 40 WHITBY ST #40 EAST BOSTON 2128101749004 TAYLOR SUSAN J TAYLOR SUSAN J 38 WHITBY ST #38 EAST BOSTON MA 2128 38 WHITBY ST #38 EAST BOSTON 2128101749006 ZHEN JIEYA ZHEN JIEYA 36 WHITBY ST EAST BOSTON MA 2128 36 WHITBY ST #36 EAST BOSTON 2128101749008 DIROCCO MARY ANN DIROCCO MARY ANN 34 WHITBY ST #34 E BOSTON MA 2128 34 WHITBY ST #34 EAST BOSTON 2128101749010 PIZZARO RAMIRO PIZZARO RAMIRO 32 WHITBY ST #32 E BOSTON MA 2128 32 WHITBY ST #32 EAST BOSTON 2128101749012 ACONE LYNNETTE GARCIA ACONE LYNNETTE GARCIA 30 WHITBY ST #30 E BOSTON MA 2128 30 WHITBY ST #30 EAST BOSTON 2128101752000 TUPAY ROSEMARIE TUPAY ROSEMARIE 15 CYPRESS ST STE 301 NEWTON MA 2459 WHITBY ST EAST BOSTON 2128101753000 TUPAY ROSEMARIE TUPAY ROSEMARIE 15 CYPRESS ST STE 301 NEWTON MA 2459 16 WHITBY ST EAST BOSTON 2128101762000 DESA PATRICE M DESA PATRICE M 21 WHITBY ST EAST BOSTON MA 2128 21 WHITBY ST EAST BOSTON 2128101763000 GUARINO VINCENZO M ETAL GUARINO VINCENZO M ETAL 70 ASHLEY EAST BOSTON MA 2128 70 ASHLEY ST EAST BOSTON 2128101764000 ROMAN CATH ARCH BOSTON ROMAN CATH ARCH BOSTON 54 ASHLEY EAST BOSTON MA 2128 54 ASHLEY ST EAST BOSTON 2128101774000 ROMAN CATH ARCH OF BOS ROMAN CATH ARCH OF BOS 61 ASHLEY EAST BOSTON MA 2128 61 ASHLEY ST EAST BOSTON 2128101775000 ROMAN CATH ARCH OF BOS ROMAN CATH ARCH OF BOS 67 ASHLEY EAST BOSTON MA 2128 67 ASHLEY ST EAST BOSTON 2128101777000 ENRIQUE ANTONIO M ENRIQUE ANTONIO M 87 ASHLEY EAST BOSTON MA 2128 87 ASHLEY ST EAST BOSTON 2128101778000 APARECIDO FAMILY TRUST APARECIDO FAMILY TRUST 91 ASHLEY ST EAST BOSTON MA 2128 91 ASHLEY ST EAST BOSTON 2128101779000 MAZZARELLA MARIA A MAZZARELLA MARIA A 95 ASHLEY ST EAST BOSTON MA 2128 95 ASHLEY ST EAST BOSTON 2128101780000 MADRIGAL ALBA MADRIGAL ALBA 99 ASHLEY ST EAST BOSTON MA 2128 99 ASHLEY ST EAST BOSTON 2128101781000 FERNANDES ELIZANDRA FERNANDES ELIZANDRA 101 ASHLEY ST E BOSTON MA 2128 101 ASHLEY ST EAST BOSTON 2128101782000 CUASCUT OMAR CUASCUT OMAR 105 ASHLEY ST EAST BOSTON MA 2128 105 ASHLEY ST EAST BOSTON 2128101783000 VELASQUEZ ROSANGELA VELASQUEZ ROSANGELA 16 HYDE STREET NEWTON MA 2461 109 ASHLEY ST EAST BOSTON 2128101784000 COLARUSSO MICHAEL TS COLARUSSO MICHAEL TS 990 HUMPHREY ST SWAMPSCOTT MA 1907 115 ASHLEY ST EAST BOSTON 2128101812000 RODRIGUEZ ROBERTO RODRIGUEZ ROBERTO 87 LEYDEN ST E BOSTON MA 2128 87 LEYDEN ST EAST BOSTON 2128101813000 WHEELER ADAM WHEELER ADAM 91 LEYDEN ST EAST BOSTON MA 2128 91 LEYDEN ST EAST BOSTON 2128101814000 SCARFO DAMIARO ETAL SCARFO DAMIARO ETAL 104 LAKE SHORE RD BOXFORD MA 1921 93 LEYDEN ST EAST BOSTON 2128101815000 MAZZARELLA MARIA A MAZZARELLA MARIA A 101 LEYDEN ST EAST BOSTON MA 2128 101 LEYDEN ST EAST BOSTON 2128101816000 LEYDEN REALTY TRUST LEYDEN REALTY TRUST 3 MORENO DR WOBURN MA 1801 103 105 LEYDEN ST EAST BOSTON 2128101817000 ZAWASKI RICHARD L ETAL ZAWASKI RICHARD L ETAL 109 LEYDEN EAST BOSTON MA 2128 109 LEYDEN ST EAST BOSTON 2128101818000 CONTRERAS BORIS CONTRERAS BORIS 113 LEYDEN ST EAST BOSTON MA 2128 113 LEYDEN ST EAST BOSTON 2128

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PREPARED FOR:MAGNOLIA BOARDMAN LLC40 WARREN STREETCHARLESTOWN, MA

REFERENCES:OWNERS OF RECORD:YOLANDA CERULLOOTTAVIO CERULLO33 BOARDMAN STREETEAST BOSTON, MA 02128

DEBORAH DELEOROBERT DELEO29-31 BOARDMAN STREETEAST BOSTON, MA 02128

DEED: BK 23026; PG 33 (#29)BK 21446; PG 143 (#33)

PLAN: BK 2221; PG ENDBK 2146; PG ENDBK 1873; PG ENDBK 12625; PG 1

CITY OF BOSTON ENGINEERING RECORDSL-3322 BOARDMAN STREETL-4182 BOARDMAN & SARATOGA STREETSL-3322 BOARDMAN STREETL-11217 WHITBY STREETFB 658; PGS 116-117FB 787; PGS 86-87

ACCORDING TO THE FEDERAL EMERGENCYMANAGEMENT AGENCY (F.E.M.A.) MAPS, THEMAJOR IMPROVEMENTS ON THIS PROPERTY FALL INAN AREA DESIGNATED ASZONE: AECOMMUNITY PANEL: 25025C0019JEFFECTIVE DATE: 03/16/2016

ALL ELEVATIONS SHOWN ON THIS PLAN ARERELATIVE TO BOSTON CITY BASE DATUM.

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10.59

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10.00

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10.01

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1950 Lafayette Road Portsmouth, NH 03801 Tel: (603) 610-7100 Fax: (603) 6107101

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April 21, 2020

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Eric Bradanese, P.E.

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20-67702.dwg

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20-67702

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Notice of Intent 31-33 Boardman Street (Parcel ID: 0101734000 & 0101735000) East Boston, Massachusetts

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Existing Conditions Plan

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40 Warren Street Charlestown, MA

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DATE

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LEGEND

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%%UNOTE%%U:

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THE ENTIRE PARCEL IS LOCATED WITHIN

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THE RESOURCE AREA KNOWN AS LAND

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SUBJECT TO COASTAL STORM FLOWAGE

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ELEV. 16.45 (BCB, ELEV. 10 NAVD88)

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PREPARED FOR:Magnolia Boardman LLC40 WARREN STREETCHARLESTOWN, MA

REFERENCES:OWNERS OF RECORD:YOLANDA CERULLOOTTAVIO CERULLO33 BOARDMAN STREETEAST BOSTON, MA 02128

DEBORAH DELEOROBERT DELEO29-31 BOARDMAN STREETEAST BOSTON, MA 02128

DEED: BK 23026; PG 33 (#29)BK 21446; PG 143 (#33)

PLAN: BK 2221; PG ENDBK 2146; PG ENDBK 1873; PG ENDBK 12625; PG 1

CITY OF BOSTON ENGINEERING RECORDSL-3322 BOARDMAN STREETL-4182 BOARDMAN & SARATOGA STREETSL-3322 BOARDMAN STREETL-11217 WHITBY STREETFB 658; PGS 116-117FB 787; PGS 86-87

PURPOSE:THE PURPOSE OF THIS PLAN IS TO CONSOLIDATE CITY OFBOSTON PARCEL ID'S 0101734000 & 0101735000 INTOONE LOT WITH A TOTAL AREA OF 9,000±SF.

ACCORDING TO THE FEDERAL EMERGENCYMANAGEMENT AGENCY (F.E.M.A.) MAPS, THEMAJOR IMPROVEMENTS ON THIS PROPERTY FALL INAN AREA DESIGNATED ASZONE: AECOMMUNITY PANEL: 25025C0019JEFFECTIVE DATE: 03/16/2016

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14.96

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14.31

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14.49

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14.48

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14.24

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13.51

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10.59

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10.99

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9.92

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10.00

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10.01

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10.18

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10.06

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10.25

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11.68

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14.68

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12.26

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12.76

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11.53

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90.00'

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90.00'

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100.00'

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100.00'

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PROP. 3 STORY 3 FAMILY ADDITION NO. 31A BOARDMAN F.F.E.=16.75 BASEMENT/GARAGE ELEV.=8.75

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LIGHT WELL

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LIGHT WELL

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LOT LINE TO BE REMOVED

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H

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Y

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D

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D

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BOARDMAN STREET

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S

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Exist. 4" Gas Main

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WV

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WV

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W

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S

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O

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PROP. CONC. RAMP

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REMOVE EXIST. SHED

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REMOVE EXIST. POOL

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REMOVE EXIST. STAIRS & LANDING

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PROP. CURB CUT 14.00'

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10.00'

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10.00'

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12.83'

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8.00

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7.75

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8.75

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MEET EXIST. GRADE ALONG PROPERTY LINE

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INV.@BLD=6.25

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CLOSE EXIST.

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CURB CUT

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LIMIT OF PUBLIC EXCAVATION (WATER&FIRE)(4'x19')

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LIMIT OF PUBLIC EXCAVATION (SEWER)(4'x28')

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PROP. 6" PVC (SDR-35) SEWER SERVICE PROP. INV. AT CHIMNEY=5.51 PROP. INV. AT MAIN=-1.24 Exist. Inv. at Main=-3.74

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PROP. BITUMINOUS CONCRETE DRIVEWAY

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PROP. 2" TYPE "K" COPPER DOMESTIC WATER SERVICE WITH SIDEWALK COCK, CORPORATION STOP, & 1" WATER METER

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PROP. 4" CLDI (CLASS 56, ZINC COATED) FIRE SERVICE WITH TAPPING SLEEVE & GATE VALVE

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PROP. 1" WATER METER LOCATION

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PROP. SEWER CLEANOUT

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PROP. PERVIOUS PAVER DRIVEWAY & PARKING AREA

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PROP. DOWNSPOUT (TYP.) INV.=10.20

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REMOVE PORTION OF EXIST. BUILDING

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REMOVE EXIST. DECK

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8.95

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14

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13

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12

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11

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10

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9

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9

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10

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9

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8

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(6) 60 L.F. 12" PERFORATED P.E. ADS PIPE EMBEDDED IN PAVER STONE BEDDING INV.=6.00

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STA.0+00 PROP. CORNER

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STA.0+04.4 C&C EX. WATER (33)

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STA.0+37 PROP. SEWER

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STA.0+47 PROP. DOM. WATER

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STA.0+49 PROP. FIRE

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STA.0+56.3 EX. DMH

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STA.0+66 EX. SMH

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STA.0+74.6 C&C EX. WATER (29)

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STA.1+00 PROP. CORNER

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8

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INV.=6.60

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INV.=6.60

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INV.=10.20

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10

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PROP. DOUBLE STAKED HAYBALES & SILTATION FENCE

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14' WIDE OVERHEAD GARAGE DOOR W/ BREAKAWAY BOTTOM PANEL (21"x168")

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8.75

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8.75

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8.75

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A'

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B'

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C'

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C

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B

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A

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8

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14.95

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9.99

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DRAWING TITLE:

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PREPARED BY:

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April 21, 2020

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20-67702.dwg

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20-67702

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PROJECT:

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DATE:

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DWG FILE NAME:

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CHECKED BY:

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DESIGN BY:

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PROJECT #:

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SCALE: AS NOTED

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Plan to Accompany Notice of Intent

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DATE

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EXISTING SEWERLINE

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EXISTING SPOT SHOTS

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LEGEND

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EXISTING DRAIN MANHOLE

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EXISTING DRAIN LINE

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EXISTING WATER SHUTOFF

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EXISTING WATER LINE

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PROPOSED BUILDING

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EXISTING CATCH BASIN

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PROPERTY LINE

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EXISTING SEWER MANHOLE

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EXISTING UTILITY POLE

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0

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10

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10

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20

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40

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5

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EXISTING CHAIN LINK FENCE

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PROPOSED SEWER LINE

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PROPOSED WATERLINE

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PROPOSED DRAINLINE

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PROPOSED BITUMINOUS CONCRETE

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PROPOSED PERVIOUS PAVERS

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NOTES: 1. EXISTING CONDITIONS INFORMATION COMPILED FROM A FIELD EXISTING CONDITIONS INFORMATION COMPILED FROM A FIELD SURVEY PERFORMED BY BOSTON SURVEY, INC., ON FEBRUARY 5, BOSTON SURVEY, INC., ON FEBRUARY 5, 2020 AND PLANS OF RECORD WHERE AVAILABLE. 2. EXISTING SANITARY SEWER, STORM DRAIN (INCLUDING EXISTING EXISTING SANITARY SEWER, STORM DRAIN (INCLUDING EXISTING CHIMNEY LOCATIONS) AND WATER INFORMATION CONFIRMED BY BWSC SYSTEM MAPS. 3. LOCATION OF EXISTING UTILITIES TO BE CONFIRMED BY LOCATION OF EXISTING UTILITIES TO BE CONFIRMED BY CONTRACTOR PRIOR TO CONSTRUCTION. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING AND THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING AND DETERMINING THE LOCATION, SIZE AND ELEVATION OF ALL EXISTING UTILITIES, SHOWN OR NOT SHOWN ON THIS PLAN, PRIOR TO ANY CONSTRUCTION. 5. THE ENGINEER SHALL BE NOTIFIED IN WRITING OF ANY UTILITIES THE ENGINEER SHALL BE NOTIFIED IN WRITING OF ANY UTILITIES FOUND INTERFERING WITH THE PROPOSED CONSTRUCTION AND APPROPRIATE REMEDIAL ACTION BEFORE PROCEEDING WITH THE WORK. 6. THE LOCATION OF ALL UNDERGROUND UTILITIES SHOWN HEREON THE LOCATION OF ALL UNDERGROUND UTILITIES SHOWN HEREON ARE APPROXIMATE AND ARE BASED ON THE FIELD LOCATION OF ALL VISIBLE STRUCTURES SUCH AS CATCH BASINS, MANHOLES, WATERGATES, ETC. AND COMPILED FROM PLANS SUPPLIED BY VARIOUS UTILITY COMPANIES AND GOVERNMENT AGENCIES. 7. A MINIMUM OF 10 FEET CLEARANCE HORIZONTALLY SHALL BE A MINIMUM OF 10 FEET CLEARANCE HORIZONTALLY SHALL BE MAINTAINED BETWEEN SANITARY SEWER MAINS AND WATER MAINS. WHENEVER CONDITIONS PREVENT A LATERAL SEPARATION OF 10 FEET TO A WATER MAIN, THE ELEVATION OF THE CROWN OF THE SEWER SHALL BE AT LEAST 18 INCHES BELOW THE INVERT OF THE WATER MAIN. 8. ALL CONTRACTORS SHOULD NOTIFY, IN WRITING, ALL UTILITY ALL CONTRACTORS SHOULD NOTIFY, IN WRITING, ALL UTILITY COMPANIES OR AGENCIES PRIOR TO ANY EXCAVATION WORK. CALL DIGSAFE, 1-800-322-4844. 9. DATUM: BOSTON CITY BASE DATUM: BOSTON CITY BASE 10. A ROUGH CONSTRUCTION SIGN-OFF MUST BE OBTAINED FROM THE A ROUGH CONSTRUCTION SIGN-OFF MUST BE OBTAINED FROM THE CITY OF BOSTON INSPECTIONAL SERVICES DEPARTMENT PRIOR TO FINAL APPROVAL OF THE GENERAL SERVICE APPLICATION. 11. THE SUBJECT PROPERTY IS COMPRISED OF THE ORIGINAL PARCELS THE SUBJECT PROPERTY IS COMPRISED OF THE ORIGINAL PARCELS NUMBER 29 AND 33 BOARDMAN STREET. THE PARCELS ARE TO BE COMBINED AND RETAIN THE ADDRESSES OF 31, 31A AND 33 BOARDMAN STREET.

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14.96

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12

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PROPOSED LANDSCAPED AREA

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Y

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D

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EXISTING FIRE HYDRANT

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EXISTING GASLINE

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PROPOSED CONTOUR

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WORK

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AREA

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1' (MIN.)

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8" (MIN.)

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STAKED BALES

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SILT FENCE

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4"

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NOTE:

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FLOW

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STAPLE

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A

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STAPLE

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B

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A

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B

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(MAX)

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5'

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NOT TO SCALE

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%%USILT FENCE / HAYBALE BARRIER

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1 "x 1 "x 4' WOOD STAKE OR 12"x 1 "x 4' WOOD STAKE OR 12"x 4' WOOD STAKE OR APPROVED EQUAL

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BALE TWINE TO BE PARALLEL TO GROUND SURFACE

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PROTECTED AREA

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WOOD STAKE JOINT DETAIL

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4" COMPACTED EARTH MOUND

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TOP OF GROUND

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1"x 1"x 3' WOOD STAKE, (2 PER BALE)

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PUT ONE HAY BALE PERPENDICULAR ALONG HAY BALE BARRIER (100' O.C.)

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%%UREQUIRED FLOW THROUGH OPENINGS (31 BOARDMAN)%%U:

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REQUIRED: 1in OF OPENING PER 1 S.F. OF ENCLOSURE

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ENCLOSURE= 1,080 S.F.

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OPENINGS: 21"x168" = 3,528 in

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3,528 PROVIDED > 1,080 REQUIRED

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2

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%%UNOTE%%U:

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THE ENTIRE PARCEL IS LOCATED WITHIN

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THE RESOURCE AREA KNOWN AS LAND

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SUBJECT TO COASTAL STORM FLOWAGE

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ELEV. 16.45 (BCB, ELEV. 10 NAVD88)

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2

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PERFORATED P.E. ADS PIPE

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FINISH GRADE

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%%UDOWNSPOUT DISCHARGE DETAIL

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NOT TO SCALE

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MIN. 6" THICK NO. 57 OPEN-GRADED CRUSHED STONE

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MIN. 8" THICK NO. 2 OPEN-GRADED CRUSHED STONE

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LAID LEVEL (INV. 6.50)

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PROPOSED

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24" STONE BED (MIN. PER DRAINAGE REQUIREMENT)

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1 " THICK NO.8 12" THICK NO.8 OPEN-GRADED BASE STONE

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FILTER FABRIC

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45%%D BEND

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DOWNSPOUT

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1' MAX.

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GALVANIZED INCH WIRE MESH 14 INCH WIRE MESH SCREEN PIPE CAP W/STAINLESS W/STAINLESS STEEL HOSE CLAMP TO SECURE SCREEN

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OVERFLOW SCREEN DETAIL (SEE DETAIL)

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REDUCER FITTING AS REQUIRED

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6" PVC

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4" PVC

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PROP. CONCRETE PAVER MIN. 3 " THICK18" THICK

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ELEV. VARIES

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BOT. PIPE ELEV. 6.00

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NOTES: 1. 2 3/8" (60 MM) THICK PAVERS MAY BE USED IN PEDESTRIAN 2 3/8" (60 MM) THICK PAVERS MAY BE USED IN PEDESTRIAN APPLICATIONS. 2. NO. 2 STONE SUBBASE THICKNESS VARIES WITH DESIGN. NO. 2 STONE SUBBASE THICKNESS VARIES WITH DESIGN. CONSULT ICPI PERMEABLE INTERLOCKING CONCRETE PAVEMENT MANUAL.

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BEDDING COURSE 1 1/2 TO 2" THICK (TYP. NO. 8 AGGREGATE)

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MIN. 6" THICK NO. 57 STONE OPEN-GRADED BASE

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MIN. 8" THICK NO. 2 STONE SUBBASE

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OPTIONAL GEOTEXTILE ON BOTTOM AND SIDES OF OPEN-GRADED BASE

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SOIL SUBGRADE - ZERO SLOPE

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CURB/EDGE RESTRAINT WITH CUT-OUTS FOR OVERFLOW DRAINAGE (CURB SHOWN)

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CONCRETE PAVERS MIN. 3 1/8" THICK

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TYP. NO. 8 AGGREGATE IN OPENINGS

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ECO-STONE PERMEABLE PAVEMENT WITH FULL EXFILTRATION TO SOIL SUBGRADE

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NOT TO SCALE

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12" PERFORATED P.E. ADS PIPE

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24" MIN.

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0.5'

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1.5'

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ELEV.=6.00

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ELEV.=7.00

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BOT. STONE ELEV. 5.50

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%%UREQUIRED FLOW THROUGH OPENINGS (31A BOARDMAN)%%U:

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OPENINGS: 21"x168" = 3,528 in

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2

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2

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%%UREQUIRED FLOW THROUGH OPENINGS (33 BOARDMAN)%%U:

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OPENINGS: 21"x168" = 3,528 in

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2

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2

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REQUIRED FLOOD OPENING CALCULATIONS

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REVISED PER CONSERVATION COMMISSION COMMENTS

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4/23/2020

Climate Resiliency Checklist

Boston Climate Resiliency - Checklist – Page 1 of 6 December 14, 2017 revised

NOTE: Project filings should be prepared and submitted using the online Climate Resiliency Checklist.

A.1 - Project Information

Project Name: Proposed 3 Story Addition

Project Address: 31-33 Boardman Street, East Boston, MA

Project Address Additional:

Filing Type (select) Initial (PNF, EPNF, NPC or other substantial filing) Design / Building Permit (prior to final design approval), or Construction / Certificate of Occupancy (post construction completion)

Filing Contact Vahid Nickpour

Nova Realty Trust [email protected]

617-799-8482

Is MEPA approval required No 4/21/2020

A.3 - Project Team

Owner / Developer: Nova Realty Trust

Architect: Timothy Sheehan Design

Engineer: Engineering Alliance, Inc.

Sustainability / LEED:

Permitting:

Construction Management:

A.3 - Project Description and Design Conditions

List the principal Building Uses: 9 Unit Multifamily Residential

List the First Floor Uses: (3) 2-Bedroom Units: 2 Bedrooms, 2 Bath, Kitchen, Living Room

List any Critical Site Infrastructure and or Building Uses:

N/A

Site and Building:

Site Area: 9.000 SF Building Area: 3,308 SF (3 Floors)

Building Height: 40’-7” Ft Building Height: 3 Stories

Existing Site Elevation – Low: 9.99 Ft BCB Existing Site Elevation – High: 14.95 Ft BCB

Proposed Site Elevation – Low: 7.50 Ft BCB Proposed Site Elevation – High: 14.95 Ft BCB

Proposed First Floor Elevation: 16.75 Ft BCB Below grade levels: 0 Stories

Article 37 Green Building:

LEED Version - Rating System : N/A LEED Certification: No


Proposed LEED rating: N/A Proposed LEED point score: N/A

Building Envelope When reporting R values, differentiate between R discontinuous and R continuous. For example, use “R13” to show R13 discontinuous and use R10c.i. to show R10 continuous. When reporting U value, report total assembly U value including supports and structural elements.

Roof: R42 Exposed Floor: R30

Foundation Wall: R13, R5c.i. Slab Edge (at or below grade): R10

Vertical Above-grade Assemblies (%’s are of total vertical area and together should total 100%):

Area of Opaque Curtain Wall & Spandrel Assembly:

0% Wall & Spandrel Assembly Value: (U)

Area of Framed & Insulated / Standard Wall:

82% Wall Value R21

Area of Vision Window: 15% Window Glazing Assembly Value: .30

Window Glazing SHGC: .29

Area of Doors: 3% Door Assembly Value: .16

Energy Loads and Performance

For this filing – describe how energy loads & performance were

determined

Annual Electric: 1,095 (kWh) Peak Electric: 6 (kW)

Annual Heating: 280 (MMbtu/hr) Peak Heating: 140 (Mbtu/hr)

Annual Cooling: 39,600 (Tons/hr) Peak Cooling: 18 (Tons)

Energy Use - Below ASHRAE 90.1 - 2013:

10% Have the local utilities reviewed the building energy performance?:

No

Energy Use - Below Mass. Code: 10% Energy Use Intensity: 17.8 (kBtu/SF)

Back-up / Emergency Power System

Electrical Generation Output: N/A Number of Power Units:

System Type: (kW) Fuel Source:

Emergency and Critical System Loads (in the event of a service interruption)

Electric: 0.5 (kW) Heating: 0 (MMbtu/hr)

Cooling: (Tons/hr)


B – Greenhouse Gas Reduction and Net Zero / Net Positive Carbon Building Performance Reducing GHG emissions is critical to avoiding more extreme climate change conditions. To achieve the City’s goal of carbon neutrality by 2050 new buildings performance will need to progressively improve to net carbon zero and positive.

B.1 – GHG Emissions - Design Conditions

For this Filing - Annual Building GHG Emissions: 0 (Tons)

For this filing - describe how building energy performance has been integrated into project planning, design, and engineering and any supporting analysis or modeling:

All buildings have been designed to meet or exceed values set forth under 2015 IRC Table N1102.1.2 (R402.1.2) and Massachusetts amendments. Each individual unit will be subject to a Home Energy Rating System (HERS) assessment and will include a high performing wood-framed building envelope with clad-wood thermal windows and doors and ENERGY STAR appliances. Intelligent lighting and control systems in individual units and common spaces will also be utilized to help reduce energy loads.

Describe building specific passive energy efficiency measures including orientation, massing, envelop, and systems:

All units have been designed with operable windows for optimal natural ventilation and with building specific exterior shading devices to maximize solar shading in the summer and solar gain in the winter. Building massing and window orientation and sizing have been done with sustainable daylighting techniques in mind.

Describe building specific active energy efficiency measures including equipment, controls, fixtures, and systems:

The project has been designed using a thermal-friendly wood-framed building envelope. Within common areas, occupancy sensors and dimming shall be incorporated. Within residential units, high-performance HVAC equipment, Energy Star Appliances, and individual smart thermostats will be utilized. Tankless on-demand style water heaters are durable, low maintenance, and water conserving plumbing fixtures will contribute to overall building comfort and efficiency.

Describe building specific load reduction strategies including on-site renewable, clean, and energy storage systems:

Nothing planned at this time.

Describe any area or district scale emission reduction strategies including renewable energy, central energy plants, distributed energy systems, and smart grid infrastructure:

Nothing planned at this time.

Describe any energy efficiency assistance or support provided or to be provided to the project: Nothing planned at this tie.

B.2 - GHG Reduction - Adaptation Strategies

Describe how the building and its systems will evolve to further reduce GHG emissions and achieve annual carbon net zero and net positive performance (e.g. added efficiency measures, renewable energy, energy storage, etc.) and the timeline for meeting that goal (by 2050):


None

C - Extreme Heat Events Annual average temperature in Boston increased by about 2˚F in the past hundred years and will continue to rise due to climate change. By the end of the century, the average annual temperature could be 56° (compared to 46° now) and the number of days above 90° (currently about 10 a year) could rise to 90.

C.1 – Extreme Heat - Design Conditions

Temperature Range - Low: 7.4 Deg. Temperature Range - High: 90.8 Deg.

Annual Heating Degree Days: 5400 Annual Cooling Degree Days 750

What Extreme Heat Event characteristics will be / have been used for project planning

Days - Above 90°: 1.5 Days – Above 100°: 0

Number of Heatwaves / Year: 1 Average Duration of Heatwave (Days): 3

Describe all building and site measures to reduce heat-island effect at the site and in the surrounding area:

C.2 - Extreme Heat – Adaptation Strategies

Describe how the building and its systems will be adapted to efficiently manage future higher average temperatures, higher extreme temperatures, additional annual heatwaves, and longer heatwaves:

None

Describe all mechanical and non-mechanical strategies that will support building functionality and use during extended interruptions of utility services and infrastructure including proposed and future adaptations:

None

D - Extreme Precipitation Events From 1958 to 2010, there was a 70 percent increase in the amount of precipitation that fell on the days with the heaviest precipitation. Currently, the 10-Year, 24-Hour Design Storm precipitation level is 5.25”. There is a significant probability that this will increase to at least 6” by the end of the century. Additionally, fewer, larger storms are likely to be accompanied by more frequent droughts.

D.1 – Extreme Precipitation - Design Conditions

10 Year, 24 Hour Design Storm: 4.6 In. (TR-20)

Describe all building and site measures for reducing storm water run-off:


On-site stormwater management facility consisting of pervious pavers and subsurface perforated pipe systems. Designed to mitigate flows up to 100-year storm event (6.80 in., TR-20)

D.2 - Extreme Precipitation - Adaptation Strategies

Describe how site and building systems will be adapted to efficiently accommodate future more significant rain events (e.g. rainwater harvesting, on-site storm water retention, bio swales, green roofs):

On-site stormwater management facility consisting of pervious pavers and subsurface perforated pipe systems. Designed to mitigate flows up to 100-year storm event (6.80 in., TR-20)

E – Sea Level Rise and Storms Under any plausible greenhouse gas emissions scenario, sea levels in Boston will continue to rise throughout the century. This will increase the number of buildings in Boston susceptible to coastal flooding and the likely frequency of flooding for those already in the floodplain.

Is any portion of the site in a FEMA SFHA? Yes What Zone: AE

Current FEMA SFHA Zone Base Flood Elevation: 16.45 Ft BCB

Is any portion of the site in a BPDA Sea Level Rise - Flood Hazard Area? Use the online BPDA SLR-FHA Mapping Tool

to assess the susceptibility of the project site.

Yes

If you answered YES to either of the above questions, please complete the following questions. Otherwise you have completed the questionnaire; thank you!

E.1 – Sea Level Rise and Storms – Design Conditions

Proposed projects should identify immediate and future adaptation strategies for managing the flooding scenario represented on the BPDA Sea Level Rise - Flood Hazard Area (SLR-FHA) map, which depicts a modeled 1% annual chance coastal flood event with 40 inches of sea level rise (SLR). Use the online BPDA SLR-FHA Mapping Tool to identify the highest Sea Level Rise - Base Flood Elevation for the site. The Sea Level Rise - Design Flood Elevation is determined by adding either 24” of freeboard for critical facilities and infrastructure and any ground floor residential units OR 12” of freeboard for other buildings and uses.

Sea Level Rise - Base Flood Elevation: 19.5 Ft BCB

Sea Level Rise - Design Flood Elevation:

20.5 Ft BCB First Floor Elevation: 16.75Ft BCB (Match Existing)

Site Elevations at Building: 14.95 Ft BCB Accessible Route Elevation: 14.60

Describe site design strategies for adapting to sea level rise including building access during flood events, elevated site areas, hard and soft barriers, wave / velocity breaks, storm water systems, utility services, etc.:

Site grades have been designed as high as possible while accommodating the existing building elevation. The existing first floor elevation is above the 100-yr flood plain elevation. The first floor elevation of the new addition will match that of the two existing dwellings.


Describe how the proposed Building Design Flood Elevation will be achieved including dry / wet flood proofing, critical systems protection, utility service protection, temporary flood barriers, waste and drain water back flow prevention, etc.:

All mechanicals will be relocated or installed on the building first floor which are above the 100-yr flood plain elevation.

Describe how occupants might shelter in place during a flooding event including any emergency power, water, and waste water provisions and the expected availability of any such measures:

The living space is all above the 100-yr flood plain so as to provide shelter during flooding events.

Describe any strategies that would support rapid recovery after a weather event:

The municipal roadway network would be utilized to provide rapid recovery.

E.2 – Sea Level Rise and Storms – Adaptation Strategies

Describe future site design and or infrastructure adaptation strategies for responding to sea level rise including future elevating of site areas and access routes, barriers, wave / velocity breaks, storm water systems, utility services, etc.:

The grade is designed to be as high as possible while accommodating the existing building elevations and urban location.

Describe future building adaptation strategies for raising the Sea Level Rise Design Flood Elevation and further protecting critical systems, including permanent and temporary measures:

The grade is designed to be as high as possible while accommodating the existing building elevations and urban location.

A pdf and word version of the Climate Resiliency Checklist is provided for informational use and off-line preparation of a project submission. NOTE: Project filings should be prepared and submitted using the online Climate Resiliency Checklist. For questions or comments about this checklist or Climate Change best practices, please contact: [email protected]

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