S02 BD03252022 - Soil Erosion and Sediment Control Plan.pdf

Soil Erosion and Sediment Control Plan

For:

VAMC Replace Boilers in Building 10

830 Chalkstone Ave

Providence, RI 02908

Mapp 66/Lot 1

Owner:

Veteran Affairs Medical Center

Martin Lafferty

63 Atwells Ave

Providence, RI 02909

401-459-4760x21552

Martin.Lafferty@va.gov

Operator:

TO BE DETERMINED UPON

CONTRACT AWARD

Company Name

Name

Address

City, State, Zip Code

Telephone Number

Email Address

Estimated Project Dates:

Start Date: Fall 2021

Completion Date: Fall 2022

SESC Plan Prepared By:

LaBella Associates

Robert Steehler

300 State St

Rochester, NY 14614

585-506-2698

BSteehler@labellapc.com

Professional Engineer, NY (Federal Project)

VAMC Replace Boilers in Building 10

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SESC Plan Preparation Date:

May 2021

SESC Plan Revision Date:

Revision Date: 10/24/2016

June 2021

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OPERATOR CERTIFICATION

Upon contract award, the OPERATOR must sign this certification statement before construction may begin.

I certify under penalty of law that this document and all attachments were prepared under the direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete.

I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. I am aware that it is the responsibility of the owner/operator to implement and amend the Soil Erosion and

Sediment Control Plan as appropriate in accordance with the requirements of the RIPDES

Construction General Permit.

Operator Signature: Date

Contractor Representative: Name

Contractor Title: Title

Contractor Company Name: Company Name (if applicable)

Address: Mailing Address

Phone Number: Phone Number

Email Address: Email

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TABLE OF CONTENTS

(this will be located on the Single App) ...........................................................................ii OPERATOR CERTIFICATION ........................................................................................ iii TABLE OF CONTENTS ..................................................................................................iv

INTRODUCTION

ADDITIONAL RESOURCES

SECTION 1: SITE DESCRIPTION

1.1 Project/Site Information

1.3 Natural Heritage Area Information

1.4 Historic Preservation/Cultural Resources

SECTION 2: EROSION, RUNOFF, AND SEDIMENT CONTROL

2.1 Avoid and Protect Sensitive Areas and Natural Features

2.2 Minimize Area of Disturbance

2.3 Minimize the Disturbance of Steep Slopes

2.4 Preserve Topsoil

2.5 Stabilize Soils

2.6 Protect Storm Drain Outlets

2.7 Establish Temporary Controls for the Protection of Post-Construction Stormwater Treatment Practices

2.8 Divert or Manage Run-on from Up-gradient Areas

2.9 Retain Sediment Onsite through Structural and Non-Structural Practices

2.10 Properly Design Constructed Stormwater Conveyance Channels

2.11 Erosion, Runoff, and Sediment Control Measure List

Insert a new table for each additional construction phase

SECTION 3: CONSTRUCTION ACTIVITY POLLUTION PREVENTION

3.1 Existing Data of Known Discharges from Site

3.2 Prohibited Discharges

3.3 Proper Waste Disposal

3.4 Spill Prevention and Control

3.5 Control of Allowable Non-Stormwater Discharges

3.6 Control Dewatering Practices

3.7 Establish Proper Building Material Staging Areas

3.8 Minimize Dust

3.9 Designate Washout Areas

3.10 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices

3.11 Chemical Treatment for Erosion and Sediment Control

3.12 Construction Activity Pollution Prevention Control Measure List Insert a new table for each additional construction phase

SECTION 4: CONTROL MEASURE INSTALLATION, INSPECTION, and

MAINTENANCE

4.1 Installation

4.2 Monitoring Weather Conditions

4.3 Inspections

4.4 Maintenance

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4.5 Corrective Actions

SECTION 5: AMENDMENTS

SECTION 6: RECORDKEEPING

SECTION 7: PARTY CERTIFICATIONS

LIST OF ATTACHMENTS

This Table of Contents is structured to be automatically populated by Microsoft Word.

Upon final completion of this template, “right-click” anywhere in the Table of Contents, select “Update Field”, and then “Update entire table”. Page numbers will automatically be synced with the changed document.

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INTRODUCTION

This Construction Site Soil Erosion and Sediment Control Plan (SESC Plan) has been prepared for Veteran Affairs Medical Center (VAMC) for the VAMC Replace Boilers in Building 10 Project. In accordance with the RIDEM Rhode Island Pollutant Discharge Elimination System (RIPDES) General Permit for Stormwater Discharge Associated with Construction Activity (RIPDES Construction General Permit (“CGP”)), projects that disturb one (1) or more acres require the preparation of a SESC Plan. This SESC Plan provides guidance for complying with the terms and conditions of the RIPDES Construction General Permit and Minimum Standard 10 of the RI Stormwater Design and Installation Standards Manual. In addition, this SESC Plan is also consistent with Part D of the RI SESC Handbook entitled “Soil Erosion and Sediment Control Plans”. This document does not negate or eliminate the need to understand and adhere to all applicable RIPDES regulations.

The purpose of erosion, runoff, and sedimentation control measures is to prevent pollutants from leaving the construction site and entering waterways or environmentally sensitive areas during and after construction. This SESC Plan has been prepared prior to the initiation of construction activities to address anticipated worksite conditions. The control measures depicted on the site plan and described in this narrative should be considered the minimum measures required to control erosion, sedimentation, and stormwater runoff at the site. Since construction is a dynamic process with changing site conditions, it is the operator’s responsibility to manage the site during each construction phase so as to prevent pollutants from leaving the site. This may require the operator to revise and amend the SESC Plan during construction to address varying site and/or weather conditions, such as by adding or realigning erosion or sediment controls to ensure the SESC Plan remains compliant with the RIPDES Construction General Permit.

Records of these changes must be added to the amendment log attached to the SESC Plan, and to the site plans as “red-lined” drawings. Please Note: Even if practices are correctly installed on a site according to the approved plan, the site is only in compliance when erosion, runoff, and sedimentation are effectively controlled throughout the entire site.

It is the responsibility of the site owner and the site operator to maintain the SESC Plan at the site, including all attachments, amendments and inspection records, and to make all records available for inspection by RIDEM during and after construction. (RIPDES CGP - Part III.G)

The site owner, the site operator, and the designated site inspector are required to review the SESC Plan and sign the Party Certification pages (Section 8). The primary contractor (if different) and all subcontractors (if applicable) involved in earthwork or exterior construction activities are also required to review the SESC Plan and sign the certification pages before construction begins.

Any questions regarding the SESC Plan, control measures, inspection requirements, or any other facet of this document may be addressed to the RIDEM Office of Water Resources, at 401-222-4700 or via email:

water@dem.ri.gov.

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ADDITIONAL RESOURCES

Rhode Island Department of Environmental Management Office of Water Resources 235 Promenade Street Providence, RI 02908-5767 phone: 401-222-4700 email: water@dem.ri.gov

RIDEM RI Stormwater Design and Installation Standards Manual (RISDISM) (as amended) http://www.dem.ri.gov/pubs/regs/regs/water/swmanual15.pdf

RI Soil Erosion and Sediment Control Handbook http://www.dem.ri.gov/soilerosion2014final.pdfRIDEM 2013 RIPDES Construction General Permit http://www.dem.ri.gov/pubs/regs/regs/water/ripdesca.pdfRhode Island Department of Transportation

Standard Specifications for Road and Bridge Design and Other Specifications and Standard Details http://www.dot.ri.gov/business/bluebook.php

RIDEM Office of Water Resources Coordinated Stormwater Permitting website http://www.dem.ri.gov/programs/water/permits/ripdes/stormwater/coordinated-stormwater-permitting.phpRIDEM RIPDES Stormwater website http://www.dem.ri.gov/programs/water/permits/ripdes/stormwater/RIDEM Water Quality website (for

303(d) and TMDL listings) http://www.dem.ri.gov/programs/water/quality/

RIDEM Rhode Island Natural Heritage Program mailto:plan@dem.ri.gov

RIDEM Geographic Data Viewer – Environmental Resource Map http://www.dem.ri.gov/maps/

Natural Resources Conservation Service - Rhode Island Soil Survey Program http://www.ri.nrcs.usda.gov/technical/soils.html

Note:

The Soil Survey of Rhode Island, issued in 1980 is no longer available or supported.

More information on site-specific soil data and maps for Rhode Island is available from the Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture through the Web Soil Survey. This information is available online at: http://websoilsurvey.nrcs.usda.gov.

EPA NPDES – Stormwater Discharges from Construction Activities webpage:

http://water.epa.gov/polwaste/npdes/stormwater/Stormwater-Discharges-From-Construction-Activities.cfm

EPA Construction Site Stormwater Runoff Control BMP Menu http://water.epa.gov/polwaste/npdes/swbmp/Construction-Site-Stormwater-Run-Off-Control.

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SECTION 1: SITE DESCRIPTION

1.1 Project/Site Information

Project/Site Name:

VAMC Replace Boilers in Building 10

Proposed Conditions: The VAMC Replace Boilers in Building 10 project is the proposed addition of a two-story building with a footprint of approximately 1,100 square feet to Building 10 (The Boiler Building) at the VA Medical Center at 830 Chalkstone Avenue in Providence, RI (Providence Tax Assessor Plat 66, Lot 1 – See Figure 1). The project also includes upgrades to several utility systems around the exterior of Building 10, including new fuel tanks, water tanks, electric, and stormwater management.

Existing Conditions: The project area is currently used for vehicular access to and around Building

10. It consists primarily of asphalt pavement and a surrounding grass area, adjacent to a steep hillside. There is limited landscaping and stormwater drains to a combined underground storm and sanitary sewer system.

Project Street/Location:

830 Chalkstone Ave, Providence, RI 02908

The following are estimates of the construction site area:

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Total Project Area 37.67 acres

Total Project Area to be Disturbed 0.24 acres

1.3 Natural Heritage Area Information

RIPDES CGP - Part III.H

Are there any Natural Heritage Areas being disturbed by the construction activity or will discharges be directed to the Natural Heritage Area as a result of the construction activity?

Yes No

1.4 Historic Preservation/Cultural Resources

Are there any historic properties, historic cemeteries or cultural resources on or near the construction site?

Yes No

Describe how this determination was made and summarize state or tribal review comments:

RIDEM’s ArcGIS Environmental Resource Mapper was reviewed, and showed no historic properties, historic cemeteries, or cultural resources on or near the construction site that would be impacted by construction activity.

SECTION 2: EROSION, RUNOFF, AND SEDIMENT CONTROL

RIPDES Construction General Permit – Part III.J.1

The purpose of erosion controls is to prevent sediment from being detached and moved by wind or the action of raindrop, sheet, rill, gully, and channel erosion. Properly installed and maintained erosion controls are the primary defense against sediment pollution.

Runoff controls are used to slow the velocity of concentrated water flows. By intercepting and diverting stormwater runoff to a stabilized outlet or treatment practice or by converting concentrated flows to sheet flow erosion and sedimentation are reduced.

Sediment controls are the last line of defense against moving sediment. The purpose is to prevent sediment from leaving the construction site and entering environmentally sensitive areas.

This section describes the set of control measures that will be installed before and during the construction project to avoid, mitigate, and reduce impacts associated with construction activity. Specific control measures and their applicability are contained in Section Four: Erosion Control Measures, Section Five:

Runoff Control Measures, and Section Six: Sediment Control Measures of the RI SESC Handbook. The RI SESC Handbook can be found at the following address:

http://www.dem.ri.gov/soilerosion2014final.pdf

2.1 Avoid and Protect Sensitive Areas and Natural Features

Areas of existing and remaining vegetation and areas that are to be protected as identified in the Section

1.6 of the SESC Plan must be clearly identified on the SESC Site Plans for each Phase of Construction.

Prior to any land disturbance activities commencing on the site, the Contractor shall physically mark limits of disturbance (LOD) on the site and any areas to be protected within the site, so that workers can clearly identify the areas to be protected.

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Note:

The Soil Survey of Rhode Island, issued in 1980 is no longer available or supported.

More information on site-specific soil data and maps for Rhode Island is available from the Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture through the Web Soil Survey. This information is available online at: http://websoilsurvey.nrcs.usda.gov.

The project area is limited with no adjacent significant natural features. Establishment of the Limit of Disturbance (LOD) on-site will adequately protect adjacent areas.

Feature Requiring Protection Construction Phase

Method of Protection

Sheet #

Areas outside the LOD All Temporary Construction Fence

NA

2.2 Minimize Area of Disturbance

Will >5 acres be disturbed in order to complete this project?

Will <5 acres be disturbed or will disturbance activities be completed within a six (6) month window?

Phasing will not be required since the project involves less than 5 acres of overall disturbance.

2.3 Minimize the Disturbance of Steep Slopes

Are steep slopes (>15%) present within the proposed project area?

Steep slopes within and adjacent to the project area can be seen on C101 Existing Conditions and Demolition Plan for existing grades, and C401 Grading and Erosion Control Plan for proposed grades.

Steep slopes within the project area will need to be disturbed for the installation of a proposed retaining wall system. After installation of the retaining wall system, the downslope side will be adequately stabilized with erosion control blankets, as seen on C401.

2.4 Preserve Topsoil

Site owners and operators must preserve existing topsoil on the construction site to the maximum extent feasible and as necessary to support healthy vegetation, promote soil stabilization, and increase stormwater infiltration rates in the post-construction phase of the project.

Will existing topsoil be preserved at the site?

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Topsoil from disturbed areas will be stock-piled, screened and re-used on-site. Topsoil stockpile locations have been identified on C401 Grading and Erosion Control plan.

Soil compaction must be minimized by maintaining limits of disturbance throughout construction. In instances where site soils are compacted the site owner and operator must restore infiltration capacity of the compacted soils by tilling or scarifying compacted soils and amending soils as necessary to ensure a minimum depth of topsoil is available in these areas. In areas where infiltrating stormwater treatment practices are located compacted soils must be amended such that they will comply the design infiltration rates established in the RI Stormwater Design and Installation Standards Manual.

2.5 Stabilize Soils

Upon completion and acceptance of site preparation and initial installation of erosion, runoff, and sediment controls and temporary pollution prevention measures, the operator shall initiate appropriate temporary or permanent stabilization practices during all phases of construction on all disturbed areas as soon as possible, but not more than fourteen (14) days after the construction activity in that area has temporarily or permanently ceased.

Any disturbed areas that will not have active construction activity occurring within 14 days must be stabilized using the control measures depicted in the SESC Site Plans, in accordance with the RI SESC Handbook, and per manufacturer product specifications.

Only areas that can be reasonably expected to have active construction work being performed within 14 days of disturbance will be cleared/grubbed at any one time. It is NOT acceptable to clear and grub the entire construction site if portions will not be active within the 14-day time frame. Proper phasing of clearing and grubbing activities shall include temporary stabilization techniques for areas cleared and grubbed that will not be active within the 14-day time frame.

All disturbed soils exposed prior to October 15 of any calendar year shall be seeded by that date if vegetative measures are the intended soil stabilization method. Any such areas that do not have adequate vegetative stabilization, as determined by the site operator or designated inspector, by November 15, must be stabilized through the use of non-vegetative erosion control measures. If work continues within any of these areas during the period from October 15 through April 15, care must be taken to ensure that only the area required for that day’s work is exposed, and all erodible soil must be restabilized within 5 working days. In limited circumstances, stabilization may not be required if the intended function of a specific area of the site necessitates that it remain disturbed (i.e. construction of a motocross track).

Temporary Vegetative Control Measures

Refer to C001 General Notes sheet for Erosion and Sediment Control notes describing the sequence and installation of temporary vegetative control measures.

Temporary Non-Vegetative Control Measures

Refer to C401 Grading and Erosion Control Plan for the locations of the following temporary non-vegetative control measures: stabilized construction entrance, compost filter socks, and temporary inlet protection.

Refer to C401 Grading and Erosion Control Plan for the location of temporary erosion control blankets on steep slopes.

2.6 Protect Storm Drain Outlets

Temporary or permanent outlet protection must be used to prevent scour and erosion at discharge points through the protection of the soil surface, reduction in discharge velocities, and through the promotion of

- 7 -infiltration. Outlets often have high velocity, high volume flows, and require strong materials that will withstand the forces of stormwater. Storm drain outlet control measures also offer a last line of protection against sediment entering environmentally sensitive areas.

All stormwater outlets that may discharge sediment-laden stormwater flow from the construction site must be protected using the control practices depicted on the approved plan set and in accordance with the RI SESC Handbook.

Will temporary or permanent point source discharges be generated at the site as the result of construction of sediment traps or basins, diversions, and conveyance channels?

No new point source discharges will be created during or after construction. Temporary and permanent conditions will utilize sheet and overland flow to a proposed underground infiltration system.

2.7 Establish Temporary Controls for the Protection of Post-Construction Stormwater Treatment Practices

Temporary measures shall be installed to protect permanent or long-term stormwater control and treatment measures as they are installed and throughout the construction phase of the project so that they will function properly when they are brought online.

Will long-term stormwater treatment practices be installed at the site?

An underground infiltration system has been designed in accordance with RIDEM Standards to promote infiltration, water quality, and recharge. The underground infiltration system includes subsurface chambers, crushed stone, and filter fabric. The location of the underground infiltration system is shown on C301, Utility Plan. The location of protective measures are shown on C401, Grading and Erosion Control Plan. Details of the proposed underground infiltration system can be found in the C500 series, Construction Details.

2.8 Divert or Manage Run-on from Up-gradient Areas

Is stormwater from off-site areas anticipated to flow onto the project area or onto areas where soils will be disturbed?

Pre-Construction and Construction sub-watershed maps are included for each phase in this SESC Plan submittal.

2.9 Retain Sediment Onsite through Structural and Non-Structural Practices

SEDIMENT BARRIERS must be installed along the perimeter areas of the site that will receive stormwater from disturbed areas. This also may include the use of sediment barriers along the contour of disturbed slopes to maintain sheet flow and minimize rill and gully erosion during construction. Installation and

- 8 -maintenance of sediment barriers must be completed in accordance with the maintenance requirements specified by the product manufacturer or the RI SESC Handbook.

Will sediment barriers be utilized at the toe of slopes and other downgradient areas subject to stormwater impacts and erosion during construction?

Compost filter socks will be installed – refer to C401 Grading and Erosion Control Plan for proposed locations on-site.

Will sediment barriers be utilized along the contour of slopes to maintain sheet flow and minimize rill and gully erosion during construction?

Compost filter socks will be installed at the limits of site work along the contour – refer to C401 Grading and Erosion Control Plan for proposed placement and limits.

SEDIMENT BARRIERS

Construction Phase # Sediment Barrier Type Sediment Barrier is Labeled on Sheet #

Detail is on Sheet #

1 Compost Filter Sock C401 C501

INLET PROTECTION will be utilized to prevent soil and debris from entering storm drain inlets. These measures are usually temporary and are implemented before a site is disturbed. ALL stormwater inlets &/or catch basins that are operational during construction and have the potential to receive sediment-laden stormwater flow from the construction site must be protected using control measures outlined in the RI SESC Handbook.

For more information on inlet protection refer to the RI SESC Handbook, Inlet Protection control measure.

Maintenance

The operator must clean, or remove and replace the inlet protection measures as sediment accumulates, the filter becomes clogged, and/or as performance is compromised. Accumulated sediment adjacent to the inlet protection measures should be removed by the end of the same work day in which it is found or by the end of the following work day if removal by the same work day is not feasible.

Do inlets exist adjacent to or within the project area that require temporary protection?

The following lists the proposed storm drain inlet types selected from Section Six of the RI SESC Handbook.

Each row is unique for each phase and inlet protection type.

INLET PROTECTION

Construction Phase #

Inlet Protection Type

Inlet Protection is labeled on Sheet #

Detail(s) is/are on

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Sheet #

All Fabric Drop C401 C501

CONSTRUCTION ENTRANCES will be used in conjunction with the stabilization of construction roads to reduce the amount of sediment tracking off the project. This project has avoided placing construction entrances on poorly drained soils where possible. Where poorly drained soils could not be eliminated, the detail includes subsurface drainage.

Any construction site access point must employ the control measures on the approved SESC site plans and in accordance with the RI SESC Handbook. Construction entrances shall be used in conjunction with the stabilization of construction roads to reduce the amount of mud picked up by construction vehicles. All construction access roads shall be constructed prior to any roadway accepting construction traffic.

The site owner and operator must:

1. Restrict vehicle use to properly designated exit points.

2. Use properly designed and constructed construction entrances at all points that exit onto paved roads so that sediment removal occurs prior to vehicle exit.

3. When and where necessary, use additional controls to remove sediment from vehicle tires prior to exit (i.e. wheel washing racks, rumble strips, and rattle plates).

4. Where sediment has been tracked out from the construction site onto the surface of off-site streets, other paved areas, and sidewalks, the deposited sediment must be removed by the end of the same work day in which the track out occurs. Track-out must be removed by sweeping, shoveling, or vacuuming these surfaces, or by using other similarly effective means of sediment removal.

Will construction entrances be utilized at the proposed construction site?

CONSTRUCTION ENTRANCE

Construction Phase # Soil Type at the Entrance Entrance is located on Sheet #

Detail is on Sheet #

All MU C401 C501

STOCKPILE CONTAINMENT will be used onsite to minimize or eliminate the discharge of soil, topsoil, base material or rubble, from entering drainage systems or surface waters. All stockpiles must be located within the limit of disturbance, protected from run-on with the use of temporary sediment barriers and provided with cover or stabilization to avoid contact with precipitation and wind where and when practical.

Stock pile management consists of procedures and practices designed to minimize or eliminate the discharge of stockpiled material (soil, topsoil, base material, rubble) from entering drainage systems or surface waters.

For any stockpiles or land clearing debris composed, in whole or in part, of sediment or soil, you must comply with the following requirements:

1. Locate piles within the designated limits of disturbance.

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2. Protect from contact with stormwater (including run-on) using a temporary perimeter sediment barrier.

3. Where practicable, provide cover or appropriate temporary vegetative or structural stabilization to avoid direct contact with precipitation or to minimize sediment discharge.

4. NEVER hose down or sweep soil or sediment accumulated on pavement or other impervious surfaces into any stormwater conveyance, storm drain inlet, or surface water.

5. To the maximum extent practicable, contain and securely protect from wind.

STOCKPILE CONTAINMENT

Construction Phase # Run-on measures necessary?

(yes/no)

Stabilization or Cover Type

Stockpile Containment

Measure

Sheet #

All Yes Temporary Seed Compost Filer Sock

C501

SECTION 3: CONSTRUCTION ACTIVITY POLLUTION

PREVENTION

The purpose of construction activity pollution prevention is to prevent day to day construction activities from causing pollution.

This section describes the key pollution prevention measures that must be implemented to avoid and reduce the discharge of pollutants in stormwater. Example control measures include the proper management of waste, material handling and storage, and equipment/vehicle fueling/washing/maintenance operations.

Where applicable, include RI SESC Handbook or the RI Department of Transportation Standard Specifications for Road and Bridge Construction (as amended) specifications.

3.1 Existing Data of Known Discharges from Site

Are there known discharges from the project area?

Yes No

Describe how this determination was made:

Existing utility plans and topography. The project is located in the southern corner of the existing property, with runoff entering the existing drainage system which discharges to the combined sewer at the property line.

Is there existing data on the quality of the known discharges?

Yes No

3.2 Prohibited Discharges

The following discharges are prohibited at the construction site:

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Contaminated groundwater, unless specifically authorized by the DEM. These types of discharges may only be authorized under a separate DEM RIPDES permit.

Wastewater from washout of concrete, unless the discharge is contained and managed by appropriate control measures.

Wastewater from washout and cleanout of stucco, paint, form release oils, curing compounds, and other construction materials.

Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance. Proper storage and spill prevention practices must be utilized at all construction sites.

Soaps or solvents used in vehicle and equipment washing.

Toxic or hazardous substances from a spill or other release.

All types of waste generated at the site shall be disposed of in a manner consistent with State Law and/or regulations.

Will any of the above listed prohibited discharges be generated at the site?

There are no known groundwater contaminants. Wastewater from concrete washouts, paint, and stucco will be contained and properly stored. Spill prevention practices will be implemented onsite.

3.3 Proper Waste Disposal

Building materials and other construction site wastes must be properly managed and disposed of in a manner consistent with State Law and/or regulations.

A waste collection area shall be designated on the site that does not receive a substantial amount of runoff from upland areas and does not drain directly to a waterbody or storm drain.

All waste containers shall be covered to avoid contact with wind and precipitation.

Waste collection shall be scheduled frequently enough to prevent containers from overfilling.

All construction site wastes shall be collected, removed, and disposed of in accordance with applicable regulatory requirements and only at authorized disposal sites.

Equipment and containers shall be checked for leaks, corrosion, support or foundation failure, or other signs of deterioration. Those that are found to be defective shall be immediately repaired or replaced.

Is waste disposal a significant element of the proposed project?

On site waste collection shall be restricted to designated dumpster areas. Waste containers shall be covered / shielded from wind and precipitation at all times. It will be the responsibility of the contractor to schedule frequent waste collection. Disposal will be managed in accordance with the Providence VAMC approved Construction & Demolition Waste Management Plan, which requires a minimum of 50% waste diversion from landfills through reuse and recycling and appropriate pollution prevention measures onsite.

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3.4 Spill Prevention and Control

All chemicals and/or hazardous waste material must be stored properly and legally in covered areas, with containment systems constructed in or around the storage areas. Areas must be designated for materials delivery and storage. All areas where potential spills can occur and their accompanying drainage points must be described. The owner and operator must establish spill prevention and control measures to reduce the chance of spills, stop the source of spills, contain and clean-up spills, and dispose of materials contaminated by spills. The operator must establish and make highly visible location(s) for the storage of spill prevention and control equipment and provide training for personnel responsible for spill prevention and control on the construction site.

Are spill prevention and control measures required for this particular project?

The following practices will be followed for spill control, notification, and cleanup:

Manufacturer's recommended methods for spill cleanup will be clearly posted and site personnel will be informed of the procedures and the location of the information and cleanup supplies.

Materials and equipment necessary for spill cleanup will be kept in the material storage area on-site.

Equipment and materials will include, but will not be limited to, shovels, wheel barrows, brooms, dust pans, mops, rags, gloves, goggles, kitty litter or Speedi-Dry, sand, sawdust, and plastic and metal trash containers specifically designated for this purpose.

All spills will be cleaned up immediately after discovery.

The spill area will be kept well ventilated and personnel will wear protective clothing to prevent injury from contact with a hazardous substance.

Spills of toxic or hazardous material in excess of reportable quantities, will be reported to the Rhode Island Office of Waste Management 401-222-2797.

The construction superintendent responsible for the daily operations will be the spill prevention and cleanup coordinator. He will designate at least three other site personnel to receive spill prevention and cleanup training. These individuals will each become responsible for a particular phase of prevention and cleanup. The names of the responsible spill personnel will be posted in the material storage area and in the on-site office trailer.

The following material management practices will be used to reduce the risk of spills or other accidental exposure of materials and substances to stormwater runoff.

An effort will be made to store only enough products required to do the job.

All materials stored on-site will be stored in a neat, orderly manner in their appropriate containers, and (if possible) under a roof or other enclosure.

Products will be kept in their original containers with the original manufacturer's label.

Substances will not be mixed with one another unless recommended by the manufacturer.

Whenever possible, all of a product will be used before disposing of the container.

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Manufacturer's recommendations for proper use and disposal will be followed.

The site superintendent will inspect the storage area daily to ensure proper use and disposal of materials on-site.

The following practices will reduce the risks associated with hazardous materials (e.g., petroleum products, solvents):

A copy of all Safety Data Sheets (SDSs) for materials or products used during construction will be kept in the office trailer.

Products will be kept in original containers unless they are not re-sealable.

Original labels and material safety data (MSD sheets) will be retained; they contain important product information.

If surplus product must be disposed of, manufacturer’s or local and state-recommended methods for proper disposal will be followed.

3.5 Control of Allowable Non-Stormwater Discharges

Are there allowable non-Stormwater discharges present on or near the project area?

Yes No

List of allowable non-stormwater discharge(s) and the associated control measure(s):

Allowable non-stormwater discharges, which are described in the General Permit, that may reasonably be expected to be present and to be mixed with storm water discharges include wash-down of vehicles where no detergents are used; external building wash-down where no detergents are used; the use of water to control dust; and firefighting activities.

Are there any known or proposed contaminated discharges, including anticipated contaminated dewatering operations, planned on or near the project area?

3.6 Control Dewatering Practices

Site owners and operators are prohibited from discharging groundwater or accumulated stormwater that is removed from excavations, trenches, foundations, vaults, or other similar points of accumulation, unless such waters are first effectively managed by appropriate control measures.

Examples of appropriate control measures include, but are not limited to, temporary sediment basins or sediment traps, sediment socks, dewatering tanks and bags, or filtration systems (e.g. bag or sand filters) that are designed to remove sediment. Uncontaminated, non-turbid dewatering water can be discharged without being routed to a control.

At a minimum the following discharge requirements must be met for dewatering activities:

1. Do not discharge visible floating solids or foam.

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2. To the extent feasible, utilize vegetated, upland areas of the site to infiltrate dewatering water before discharge. In no case will surface waters be considered part of the treatment area.

3. At all points where dewatering water is discharged, utilize velocity dissipation devices.

4. With filter backwash water, either haul it away for disposal or return it to the beginning of the treatment process.

5. Replace and clean the filter media used in dewatering devices when the pressure differential equals or exceeds the manufacturer’s specifications.

6. Dewatering practices must involve the implementation of appropriate control measures as applicable (i.e. containment areas for dewatering earth materials, portable sediment tanks and bags, pumping settling basins, and pump intake protection.)

Is it at all likely that the site operator will need to implement construction dewatering in order to complete the proposed project?

The need for dewatering is not expected due to site elevation and depth to groundwater. Refer to the Geotechnical Report for approximate groundwater elevations.

3.7 Establish Proper Building Material Staging Areas

All construction materials that have the potential to contaminate stormwater must be stored properly and legally in covered areas, with containment systems constructed in or around the storage areas. Areas must be designated for materials delivery and storage. Designated areas shall be approved by the site owner/engineer. Minimization of exposure is not required in cases where the exposure to precipitation and to stormwater will not result in the discharge of pollutants, or where exposure of a specific material or product poses little risk of stormwater contamination (such as final products and materials intended for outdoor use).

Typical building materials and utility infrastructure will be staged onsite. The contractor shall manage these activities.

3.8 Minimize Dust

Dust control procedures and practices shall be used to suppress dust on a construction site during the construction process, as applicable. Precipitation, temperature, humidity, wind velocity and direction will determine amount and frequency of applications. However, the best method of controlling dust is to prevent dust production. This can best be accomplished by limiting the amount of bare soil exposed at one time.

Dust Control measures outlined in the RI SESC Handbook shall be followed. Other dust control methods include watering, chemical application, surface roughening, wind barriers, walls, and covers.

Dust control practices that will be used to suppress dust and limit its generation include applying water and limiting the amount of bare soil exposed at one time.

3.9 Designate Washout Areas

At no time shall any material (concrete, paint, chemicals) be washed into storm drains, open ditches, streets, streams, wetlands, or any environmentally sensitive area. The site operator must ensure that construction waste is properly disposed of, to avoid exposure to precipitation, at the end of each working day.

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Will washout areas be required for the proposed project?

Concrete washouts will be used for management of concrete waste (See Sheet C401). Concrete and concrete washout water shall not be deposited or discharged directly on the ground, in wetlands or waterbodies, or in catch basins or other drainage structures. Concrete washouts shall be located away from wetlands or other sensitive areas as depicted on the SESC Site Plans.

Consult the Environmental Monitor on proposed modifications to the concrete washout locations prior to their use. Following the completion of concrete pouring operations, the washouts shall be disposed of off-site with other construction debris.

3.10 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices

Vehicle fueling shall not take place within regulated wetlands or buffer zone areas, or within 50-feet of the storm drain system. Designated areas shall be depicted on the SESC Site Plans, or shall be approved by the site owner.

Vehicle maintenance and washing shall occur off-site, or in designated areas depicted on the SESC Site Plans or approved of by the site owner. Maintenance or washing areas shall not be within regulated wetlands or buffer zone areas, or within 50-feet of the storm drain system. Maintenance areas shall be clearly designated, and barriers shall be used around the perimeter of the maintenance area to prevent stormwater contamination.

Construction vehicles shall be inspected frequently for leaks. Repairs shall take place immediately. Disposal of all used oil, antifreeze, solvents and other automotive-related chemicals shall be according to applicable regulations; at no time shall any material be washed down the storm drain or in to any environmentally sensitive area.

When refueling vehicles, vehicles or equipment (except for fixed equipment) shall be taken to an access area outside of environmentally sensitive areas (such as waterways, wetlands, buffer zones or drinking water sources), or as specified in permit conditions. A paved area such as a parking lot or roadway is preferred, to minimize the possibility of spill or release to the environment. The driver shall take all usual and reasonable environmental and safety precautions during refueling, such as connecting a safety grounding strap between the fuel tank and vehicle or equipment being refueled. The driver shall frequently check for fuel spills, drips, or seeps during the refueling operation. Small equipment such as pumps and generators shall be placed in small swimming pools or on absorbent blankets/pads, to contain any accidental fuel spills. Small swimming pools with absorbent blankets/pads, and/or other secondary containment, shall be used for refueling of fixed equipment in wetlands and should be maintained to prevent accumulation of precipitation.

Routine vehicle maintenance shall not be conducted onsite.

When other vehicle or equipment maintenance operations (such as emergency repairs) occur, personnel shall bring vehicles or equipment to an access location a minimum of 100 feet away from environmentally sensitive areas (e.g., wetlands or drinking water sources). A paved area, such as a parking lot or roadway, is a preferred field maintenance location to minimize the possibility of spills or releases to the environment. Crews shall take all usual and reasonable environmental precautions during repair or maintenance operations. Occasionally, it is infeasible to move the affected vehicle or equipment from an environmentally sensitive area to a suitable access area. When this situation occurs, precautions shall be taken to prevent oil or hazardous material release to the environment. These precautions include (but are not limited

to) deployment of portable basins or similar secondary containment devices, use of ground covers, such as plastic tarpaulins, and precautionary placement of floating booms on nearby surface water bodies.

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Cleaning of tools and equipment shall be conducted away from environmentally sensitive areas (such as wetlands, buffer zones or drinking water sources) to the maximum extent possible. A paved area such as a parking lot or roadway is preferred, to minimize the possibility of spill or release to the environment. Crews shall wipe up all minor drips or spills of grease and oil at field locations.

The Contractor shall designate areas on the SESC Site Plans at least 100 feet away from drainage ditches and wetlands.

3.11 Chemical Treatment for Erosion and Sediment Control

Chemical stabilizers, polymers, and flocculants are readily available on the market and can be easily applied to construction sites for the purposes of enhancing the control of erosion, runoff, and sedimentation.

The following guidelines should be adhered to for construction sites that plan to use treatment chemicals as part of their overall erosion, runoff, and sedimentation control strategy.

The U.S. Environmental Protection Agency has conducted research into the relative toxicity of chemicals commonly used for the treatment of construction stormwater discharges. The research conducted by the EPA focused on different formulations of chitosan, a cationic compound, and both cationic and anionic polyacrylamide (PAM). In summary, the studies found significant toxicity resulting from the use of chitosan and cationic PAM in laboratory conditions, and significantly less toxicity associated with using anionic PAM.

EPA’s research has led to the conclusion that the use of treatment chemicals for erosion, runoff, and sedimentation control requires proper operator training and appropriate usage to avoid risk to aquatic species. In the case of cationic treatment chemicals additional safeguards may be necessary.

Application/Installation Minimum Requirements

If a site operator plans to use polymers, flocculants, or other treatment chemicals during construction the SESC plan must address the following:

1. Treatment chemicals shall not be applied directly to or within 100 feet of any surface water body, wetland, or storm drain inlet.

2. Use conventional erosion, runoff, and sedimentation controls prior to and after the application of treatment chemicals. Use conventional erosion, runoff, and sedimentation controls prior to chemical addition to ensure effective treatment. Chemicals may only be applied where treated stormwater is directed to a sediment control (e.g. temporary sediment basin, temporary sediment trap or sediment barrier) prior to discharge.

3. Sites shall be stabilized as soon as possible using conventional measures to minimize the need to use chemical treatment.

4. Select appropriate treatment chemicals. Chemicals must be selected that are appropriately suited to the types of soils likely to be exposed during construction and to the expected turbidity, pH, and flow rate of stormwater flowing into the chemical treatment system or treatment area. Soil testing is essential. Using the wrong form of chemical treatment will result in some form of performance failure and unnecessary environmental risk.

5. Minimize discharge risk from stored chemicals. Store all treatment chemicals in leak-proof containers that are kept under storm-resistant cover and surrounded by secondary containment structures (e.g., spill berms, decks, spill containment pallets), or provide equivalent measures, designed and maintained to minimize the potential discharge of treatment chemicals in stormwater or by any other means (e.g., storing chemicals in covered areas or having a spill kit available on site).

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6. Use chemicals in accordance with good engineering practices and specifications of the chemical provider/supplier. You must also use treatment chemicals and chemical treatment systems in accordance with good engineering practices, and with dosing specifications and sediment removal design specifications provided by the supplier of the applicable chemicals, or document specific departures from these practices or specifications and how they reflect good engineering practice.

Will chemical stabilizers, polymers, flocculants or other treatment chemicals be utilized on the proposed construction project?

3.12 Construction Activity Pollution Prevention Control Measure List

Complete the following table for each Phase of construction where Pollution Prevention Control Measures will be implemented. This table is to be used as part of the SESC Plan Inspection Report – please fill out accordingly.

It is expected that this table will be amended as needed throughout the construction project.

Phase No. (All)

Location/Station Control Measure Description/Reference

Maintenance Requirement

Downgradient at site perimeter and at stockpile areas

Compost Filter Socks, Section Six – RI SESC

Handbook

Inspection should be made after each storm event or 1/week and repair or replacement should be made promptly as needed.

Cleanout of accumulated sediment behind the filter sock if sediment accumulates to at least ½ the distance between the top of sock and ground surface.

Drainage Inlets within site

Fabric Drop Inlet Protection, Section Six

– RI SESC Handbook

Inspect weekly and after each storm event.

Remove sediment and make repairs as needed.

Stabilized Construction Entrance

Stone Stabilized Pad, Section Six – RI SESC

Handbook

The entrance shall be maintained in a condition which will prevent tracking or flowing of sediment onto pave surfaces. Provide periodic top dressing with additional stone or additional length as conditions demand.

Roads adjacent to entrance shall be clean at the end of each day.

If maintenance alone is not enough to prevent excessive track out, increase length of entrance, modify construction access road surface or install washrack or mudrack.

Concrete Washout

Prefabricated Concrete Washout Container with Ramp, Section Three –

RI SESC Handbook

Verify that concrete washout container(s) are in place prior to pouring concrete. Inspect daily to verify continued proper performance. Check remaining capacity during pouring operations.

Check for leaks periodically.

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SECTION 4: CONTROL MEASURE INSTALLATION,

INSPECTION, and MAINTENANCE

4.1 Installation

Complete the installation of temporary erosion, runoff, sediment, and pollution prevention control measures by the time each phase of earth-disturbance has begun. All stormwater control measures must be installed in accordance with good judgment, including applicable design and manufacturer specifications. Installation techniques and maintenance requirements may be found in manufacturer specifications and/or the RI SESC Handbook.

Refer to sheets C401 and C501.

4.2 Monitoring Weather Conditions

Anticipating Weather Events - Care will be taken to the best of the operator’s ability to avoid disturbing large areas prior to anticipated precipitation events. Weather forecasts must be routinely checked, and in the case of an expected precipitation event of over 0.25-inches over a 24-hour period, it is highly recommended that all control measures should be evaluated and maintained as necessary, prior to the weather event.