Phase IV remedy implementation plan : 50 Tufts Street, Somerville, Massachusetts / submitted to: UniFirst Corp. ; submitted by: GEI Consultants

2009·10.2 MB·English

by  GEI Consultants.

...
3 1155
U-Z 1'161205
CEIVED
Consultants
AUG 1 0 2009
Geotechnical
Environmental DEP
Water Resources
Ecological
RTN 3-23246
Phase IV Remedy Implementation
Plan
50 Tufts Street, Somerville, Massachusetts
Submitted to:
UmFirst Corporation
68 Jonspin Road
Wilmington, MA 01887
Submitted by:
GEI Consultants, Inc.
400 Unicorn Park Drive
Woburn, MA 01801
781-721-4000
August 10, 2009
Project 04516-3

RTN 3-23246
Phase IV Remedy Implementation Plan
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
August 10, 2009
Table of Contents
Acronyms and Abbreviations vi
Executive Summary viii
1. Introduction 1
1.1 Site Contacts (310 CMR 40.0874(3)(a)) 1
1.2 Background 2
1.3 Purpose and Scope 3
1.4 Public Involvement (310 CMR 40.1400) 4
2. Conceptual Site Model 5
2.1 Site History Overview and Current Conditions 5
2.2 Potential Contaminant Sources 6
2.3 Contaminant Distribution 6
2.3.1 Soil 6
2.3.2 DNAPL 6
2.3.3 Groundwater 7
2.3.4 Underground Utilities 7
2.3.5 Vapor Intrusion and Indoor Air 7
2.4 Source Characterization 8
2.5 Receptors and Potential Exposure Pathways 8
3. Engineering Design (310 CMR 40.0874(3)(b)) 9
3.1 CRA Goals and Performance Requirements 9
3.2 Site-Specific Characteristics Affecting the Design, Construction, or
Operation of the CRA 10
3.3 Remedial Actions Completed Through June 2009 10
3.3.1 50 Tufts Street Property 11
3.3.1.1 Background 11
3.3.1.2 Remedial Objectives 11
3.3.1.3 Efficiency and Effectiveness 12
3.3.1.4 Control of Spills/Releases or System Malfunctions 12
3.3.1.5 Management of Waste Materials 12
3.3.1.6 Consideration of Site-Specific Characteristics 13
3.3.1.7 Inspection and Monitoring 13
3.3.1.8 Future Phase IV Activities 13
3.3.2 Capuano Center 14
3.3.2.1 Background 14
3.3.2.2 Remedial Objectives 14
3.3.2.3 Control of Spills or System Malfunctions 15
GEI Consultants, Inc. ii

RTN 3-23246
Phase IV Remedy Implementation Plan
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
August 10, 2009
3.3.2.4 Management of Waste Materials 15
3.3.2.5 Consideration of Site-Specific Characteristics 15
3.3.2.6 Inspection and Monitoring 16
3.3.2.7 Future Phase IV Activities 16
3.3.3 60 Tufts Street 16
3.3.3.1 Background 16
3.3.3.2 Remedial Objectives 16
3.3.3.3 Efficiency and Effectiveness 17
3.3.3.4 Control of Spills or System Malfunctions 17
3.3.3.5 Management of Waste Materials 17
3.3.3.6 Consideration of Site Specific Characteristics 17
3.3.3.7 Inspection and Monitoring 18
3.3.3.8 Future Phase IV Activities 18
3.3.4 Residential and Commercial Properties 18
3.3.4.1 Background 18
3.3.4.2 Remedial Objectives 19
20
3.3.4.3 Efficiency and Effectiveness
3.3.4.4 Control of Spills or System Malfunctions 20
20
3.3.4.5 Management of Waste Materials
3.3.4.6 Consideration of Site-Specific Characteristics 20
21
3.3.4.7 Inspection and Monitoring
21
3.3.4.8 Future Phase IV Activities
21
3.4 New Phase IV Remedial Actions
21
3.4.1 EPEM Installations for Residential and Commercial Properties
21
3.4.2 MNA Program
4. Construction Plans and Specifications (310 CMR 40.0874(3)(c))_23
24
5. O&M Manuals (310 CMR 40.0874(3)(d))
24
5.1 50 Tufts Street Property
24
5.1.1 Operation
24
5.1.2 Maintenance
24
5.1.3 Monitoring
25
5.2 Capuano Center
25
5.2.1 Operation
25
5.2.2 Maintenance
25
5.2.3 Monitoring
26
5.3 60 Tufts Street
26
5.3.1 Operation
26
5.3.2 Maintenance
26
5.3.3 Monitoring
26
5.4 Residential and Commercial Properties
26
5.4.1 EPEM Option 1
26
5.4.1.1 Operation
GEI Consultants, Inc.
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RTN 3-23246
Phase IV Remedy Implementation Plan
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
August 10, 2009
5.4.1.2 Maintenance 27
5.4.1.3 Monitoring 27
5.4.2 EPEM Option 2 27
5.4.2.1 Operation 27
5.4.2.2 Maintenance 27
5.4.2.3 Monitoring 27
5.4.3 EPEM Option 3 28
5.4.3.1 Operation 28
5.4.3.2 Maintenance 28
5.4.3.3 Monitoring 28
6. Monitored Natural Attenuation_29
6.1 Phase III Selection of MNA 29
6.1.1 Groundwater Plume Stability 29
6.1.2 Natural Attenuation Processes 29
6.2 MNA Program Objectives 30
6.3 MNA OMM Plan (310 CMR 40.0874[3][d]) 30
6.3.1 Groundwater Level Measurements 31
6.3.2 Groundwater Sampling 31
6.3.3 Groundwater Plume Stability Analyses 31
6.3.4 Natural Attenuation Parameters Testing 32
6.4 Health and Safety 32
6.5 Reporting 32
6.6 Permits and Access 32
7. Health and Safety Plan (310 CMR 40.0874(3)(e)) 34
8. Permits/Access Issues 35
8T Required Permits (310 CMR 40.0874(3)(f)) 35
8.2 Property Access Issues (310 CMR 40.0874(3)(g)) 35
9. Schedule 36
10. Limitations 37
11. References 38
Tables
1. EPEM Status Summary
Figures
1. Site Location Map
2. Site Area and Approximate Site Boundary
GEI Consultants, Inc. IV
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RTN 3-23246
Phase IV Remedy Implementation Plan
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
August 10, 2009
3. Study Area EPEM Progress
4. EPEM Mitigation Flow Chart
5. EPEM Option 1 Schematic
6. EPEM Option 2 Schematic
7. EPEM Option 3 Schematic
8. Monitoring Well and Boring Locations
Appendices
A. DEP Transmittal Form (BWSC-108) and Notification Letters
B. Operation and Maintenance Manuals
C. Health and Safety Plan
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GEI Consultants, Inc. v