Phase V status report no. 7 and remedial monitoring report no. 22 : 50 Tufts Street, Somerville, Massachusetts / submitted to: UniFirst Corp. ; submitted by: GEI Consultants, Inc

2015·19.9 MB·English

by  GEI Consultants.

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Geotechnical
Environmental
Water Resources
Ecological
MassDEP RTN 3-23246
Phase V Status Report No. 7 and
Remedial Monitoring Report No. 22
50 Tufts Street, Somerville, Massachusetts
Submitted to:
UniFirst Corporation
68 Jonspin Road
Wilmington, MA 01887
fter
Submitted by:
GEI Consultants, Inc.
400 Unicorn Park Drive
Woburn, MA 01801
&&
781-721-4000
1
February 2, 2015
Project 04516-3
Ileen S. Gladstone, P.E., LSP, LEED AP
Senior Principal

MassDEP RTN 3-23246
Phase V Status Report No. 7 and Remedial Monitoring Report No. 22
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
February 2, 2015
Table of Contents
Acronyms and Abbreviations V
vii
Executive Summary
1. Introduction 1
1.1 Contact Information 1
1.2 Background 2
1.3 Purpose and Scope 4
1.4 Public Involvement (310 CMR 40.1400) 5
Data Collection 6
2.
2.1 Kleinfelder Investigation 6
2.2 GEI Manhole Sampling 6
2.3 Groundwater Sampling 6
6
2.3.1 GEI
2.3.2 Revised Extent of GW-2 Exceedance for PCE 7
2.3.3 Groundwater Plume Stability 7
2.4 Indoor Air Sampling 7
2.5 Indoor Air Sampling - Checklists and Methods 8
2.6 Meteorological Conditions 8
3. Capuano Center Phase IV Activities 9
9
3.1 Background
9
3.2 Remedial Objectives
3.3 Inspection and Monitoring 9
3.4 Performance Efficiency and Effectiveness 10
3.5 Management of Waste Materials 10
10
3.6 System Modifications
10
3.7 Future Phase V Activities
3.7.1 Impact of 2014 MCP Amendments for Active EPMMs 11
4. Residential and Commercial Properties Phase IV Activities 12
12
4.1 EPMM Installation
4.1.1 Remedial Objectives 13
13
4.2 Option 1 EPMMs
14
4.2.1 Operation and Monitoring
4.2.2 Impact of 2014 MCP Amendments for Active EPMMs 15
4.2.3 Efficiency and Effectiveness 17
4.2.4 System Maintenance and Modifications 17
4.2.5 Management of Waste Materials 17
GEI Consultants, Inc. ii
.
MassDEP RTN 3-23246
Phase V Status Report No. 7 and Remedial Monitoring Report No. 22
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
February 2, 2015
4.3 Option 2 and 3 EPMMs 17
4.3.1 Operation and Monitoring 18
4.3.2 Efficiency and Effectiveness 19
4.3.3 System Maintenance and Modifications 20
4.3.4 Management of Waste Materials 20
4.4 Activity and Use Limitations 20
4.5 Permanent Solution Statements 20
4.5.1 Permanent Solution without Conditions 21
4.5.2 Permanent Solution with Conditions 21
4.6 Future Phase V Activities 22
4.6.1 EPMM Operation and Monitoring 22
4.6.2 EPMM Modifications 22
4.6.3 EPMM Closure Sampling 22
4.6.4 Installation of New EPMMs 22
4.6.5 AULs and Permanent Solutions 22
5. 60 Tufts Street 24
5.1 Background 24
5.2 Remedial Objectives 24
5.3 Inspection and Monitoring 24
5.4 Performance Efficiency and Effectiveness 25
5.5 Management of Waste Materials 25
5.6 System Modifications 25
5.7 Future Phase V Activities 25
5.7.1 Impact of 2014 MCP Amendments for Active EPMMs 25
6. 50 Tufts Street Property 27
6.1 Background 27
6.2 Remedial Objectives 27
6.3 Inspection and Monitoring 27
6.4 Performance Efficiency and Effectiveness 28
6.5 Management of Waste Materials 28
6.6 System Modifications 29
6.7 Future Phase V Activities 29
6.7.1 Impact of 2014 MCP Amendments for Active EPMMs 29
7. Monitored Natural Attenuation 30
7.1 MNA Program Objectives 30
7.2 MNA Activities 30
8. Remedial Monitoring Report No. 22 32
9. References 33
GEI Consultants, Inc. in

MassDEP RTN 3-23246
Phase V Status Report No. 7 and Remedial Monitoring Report No. 22
50 Tufts Street, Somerville, Massachusetts
UniFirst Corporation
February 2, 2015
Tables_
2-1 Summary of Groundwater Sampling Activities
2-2 Chemical Testing Results - Groundwater
2-3 Chemical Testing Results - Indoor Air - 29 Knowlton
2-4 Chemical Testing Results - Post-EPMM Indoor Air - 34 Knowlton
2-5 Chemical Testing Results - Post-EPMM Indoor Air - 13 Morton
2- 6 Summary of Meteorological Data During Air Sampling Events
3- 1 Summary of SSDS Monitoring Events - Capuano Center
3- 2 Chemical Testing Results - Indoor and Outdoor Air - Capuano Center
4- 1 Exposure Pathway Mitigation Measure (EPMM) Status
4- 2 Indoor Air Sampling and EPMM Monitoring June 16 through December 15, 2014
5- 1 Summary of SSDS Monitoring Events - 60 Tufts Street
6- 1 Summary of SSDS Monitoring Events - 50 Tufts Street
7- 1 Groundwater Elevations
Figures
1-1 Site Location Map •
1- 2 Disposal Site Map and Site Boundary
2- 1 Monitoring Well Locations
2-2 Sub-Slab Soil Vapor and Indoor Air Sampling Locations
4-1 EPMM Installation Progress
4-2 EPMM Mitigation Flow Chart
4-3 Permanent Solution Status
6-1 Combined Influent VOC Concentrations and Cumulative VOC Removal
Appendices
X MassDEP Transmittal Forms (BWSC-108, BWSC-108As, and BWSC-108Bs)
B. Property Owner Notification Letters
C. Laboratory Testing Reports
D. Pre-Sampling Checklists, Air Sampling Checklists, and Photo Logs
E. Field Monitoring Forms and Inspection Logs
F. EPMM Inspection Forms
MLK/CMM/JDR/ISG:csh
N:\04516\15.0 Report Original\15.105 Phase V SR #7 & RMR #22 RTN 3-23246 (Feb 2015)\Phase V SR 7 RMR 22.docx
GEI Consultants, Inc. IV
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