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Environmental Response Laboratory Network (ERLN)
Learn More at https://www.epa.gov/emergency-response/environmental-response-laboratory-network
EPA established the Environmental Response Laboratory Network (ERLN) to assist in addressing chemical,
biological, and radiological threats during nationally significant incidents. The ERLN is managed by EPA's
Office of Emergency Management and serves as a national network of laboratories that can be accessed as
needed to support large scale environmental responses by providing consistent analytical capabilities,
capacities, and quality data in a systematic, coordinated response. Public laboratories play an invaluable role in
the network given their existing relationships with federal, state, and local decision-makers, and political
leadership. As ERLN members, public laboratories may be responsible for providing analytical data or
performing quality assurance/quality control functions.
Goals for Public Laboratory
Participation in the ERLN
Identify, quantify, verify, and supplement existing
laboratory testing capability and capacity to support
surveillance of, response to, and recovery from
incidents involving release of chemical, biological, or
radiological contaminants to the environment;
Play an integral role in a coordinated and
operational system of laboratories capable of
efficiently and effectively responding to large-
scale incidents;
Work as a partner in planning for and the
addressing of incidents, which may involve other
response networks, during a major
environmental event; and
Participate in ERLN exercises and other
opportunities that enhance preparedness,
communications, operations, and technical
competencies to respond to major
environmental incidents.
For more information please visit the ERLN Web
site: https://www.epa.gov/emergency-response/
environmental-response-laboratory-network
Frequently Asked Questions
What is a public laboratory?
A public laboratory is a laboratory operated by a
federal, state, local, or municipal government agency.
What support will members receive to help
establish or maintain special capabilities?The
ERLN is designed to access existing laboratory
capability and capacity. If there is a special capability
or capacity needed, the ERLN may help support the
development and maintenance of this capability. See
the ERLN Overview factsheet for more information on
ERLN member benefits.
How will ERLN public laboratories be
compensated or reimbursed for providing
analytical services?
Interagency Agreements are used to reimburse federal
laboratories. The primary mechanism for
compensating and reimbursing non-federal, public
laboratories for performing analytical services is a
basic ordering agreement (BOA).
The BOA can only be used to compensate
laboratories for analytical services. If a non-federal,
public laboratory is not capable of entering into a BOA
with EPA, or if a laboratory provides other services to
support a response, EPA will use other appropriate
forms of reimbursement.
Are there Proficiency Testing (PT)
requirements for membership?
Yes, the analysis/methods will supplement, rather than
duplicate, existing PT programs.
What are the responsibilities of membership?
ERLN laboratories are responsible for managing their
own internal quality system and other core
ERLN requirements.
Can ERLN Public Laboratories participate in
Method Development studies?
Yes, based on a laboratory's specific capability.
Contact Information
June 2018	Ahmed Hafez - 202.564.1944; hafez.ahmed@epa.gov
David Bright - 913.551.7897; bright.david@epa.gov
ERLN 24-Hour access via EPA HQ EOC 202.564.3850

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Environmental Protection
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ERLN Factsheet
Environmental Response Laboratory Network (ERLN)
Frequently Asked Questions (contd)
How do the ERLN and the Water Laboratory
Alliance (WLA) intersect?
Both the ERLN and the WLA were created by EPA to
provide laboratory analytical support. The ERLN is
EPA's overarching laboratory network, created to
address all types of environmental responses. The
WLA is specifically focused on water laboratories and
therefore is limited to incidents associated with water.
Laboratories that participate in the ERLN and have the
necessary capability for analyzing drinking water
automatically qualify as WLA members. However, the
WLA may have laboratories in their network that do
not meet the ERLN core requirements and therefore
would not be accessed during a large scale
response effort.
What is the role of ERLN Regional Labs?
As part of the ERLN, EPA Regional Labs:
Are responsible for the identification,
organization, and coordination of overall
regional capacity, including screening and
confirmatory laboratories during incidents;
Serve as regional points of contact with EPA
Headquarters for analytical issues during
emergencies;
Coordinate sample flow to ERLN member labs
(both within and outside the Region) in
consultation with Headquarters during
nationally significant incidents;
Coordinate training and terrorism-related
exercises for ERLN member labs to ensure
efficient sample flow to member labs as part of
national training exercises; and
Partner with regional emergency/disaster
coordinators to strengthen relationships and
establish operational roles and procedures
within the Region's emergency response
Incident Command System.
June 2018
Contact Information
Ahmed Hafez - 202.564.1944; hafez.ahmed@epa.gov
David Bright - 913.551.7897; bright.david@epa.gov
ERLN 24-Hour access via EPA HQ EOC 202.564.3850

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