Lower Neponset River Site Boston/Milton, MA - February 2020
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Lower Neponset River Site
Boston/Milton, MA
February 2020
*644037*
SEMS Doc ID 644037
Topics for Discussion Introduction MassDEP – Request for EPA Involvement Area of Interest National Priorities List (NPL) Overview of Superfund Process Timeline of Activities Outreach
Figure 2
Lower Neponset River PCBs
Boston/Milton, Massachusetts
E:PARcg1on I
Superfund TedirK.al r u ~ and
Aespomc- Teem (ST ART) IV
Ccn,..act Na. E.P~IS-01
.......
TOI-01.JU16-0009
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3April2011
18 Ap-il 2019
LEGE:ND
Upper Ne - RM!<
Mel.her Brook to Charms
lioslOn & Holingsworth Dam Area
0.2 0.4
Miles
~
~
'.A."l:•.a ■ • ■ ■ llelio.' ..,
tudies/Evaluations
Extensive USGS sampling – 2002-2006
MassDEP work _ Oversight/evaluation of
various studies and remediation of Mother
Brook.
EPA
◦ Limited sampling to confirm previous results
November 2017 and September 2018
◦ Preliminary Assessment – August 2018
◦ Site Inspection – April 2019
◦ Hazard Ranking System Package - TBD
Figure 10
2018 START Sediment Sample
Loo,tions and TOlal PCBs
(Congener) Results Map
Lower Nepooset River PCBs
Boston/Milton, Massachusetts
EMAegiar,I
Supt,fund Tcd1nul ~ 111d
R~Tea111(START)rl
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PCB Concentrations in Sediment
What is the National Priorities List (N PL)?
National list of sites that EPA determines
require further detailed investigation, and
potential cleanup action in accordance with
CERCLA*.
Investigations at NPL sites determine whether
long-term threats to human health &
environment exist.
Where needed, comprehensive strategy to
address threats is implemented.
*CERCLA = Comprehensive Environmental Response, Compensation and Liability Act
(Often referred to as Superfund)Why Add A it To NPL?
Sites on NPL subject of detailed investigation,
and cleanup where warranted.
Only sites on the NPL are eligible to receive
federal Superfund resources for
comprehensive cleanup.
Federal resources can include monetary
support, as well as expertise/staffing.
Absent the use of federal resources,
comprehensive cleanup strategies may not be
able to be pursued.How is a it Add d to the NPL?
Sites added to NPL through federal
rulemaking.
Requires letter of concurrence from Governor.
Site is first proposed to the NPL.
60-day public comment period.
Site finalized to NPL, upon consideration of
public comments received.The Superfund Process:
Discovery and Cleanup
for a Long- erm Site
valuate site's
con min · n
and determine
4iht,i ::
Discover
cl n p '/
de n p program.
n
n w •
Choo
a nup P n.Low r N pons t Riv r
Pos ibl Tim lin for NPL
Develop a Hazard Ranking System (HRS)
package.
Propose site to NPL – Fall 2020/Winter 2021
(tentative).
60 day public comment period.
Finalize site to NPL – 2021 (dependent on
public comments).
Letter of concurrence from Governor – likely
Summer 2020.O ut re ac h
Meetings held to date:
◦ City of Boston/Town of Milton
March 2017
April 2017 (Boston only)
Milton Conservation Commission public mtg April 2017
November 2019
◦ Federal legislative delegation briefing – Dec. 2019
◦ State legislative delegation briefing – Feb. 2020
◦ Boston City Council member briefing – Feb. 2020
Planned meetings:
◦ EPA sponsored public informational meeting Mattapan –
Feb. 24, 2020
◦ EPA/MassDEP presentation at Milton BOS meeting –
◦ Feb. 26, 2020You can also read
