HomeMy WebLinkAboutUS Environmental Protection AgePlease do not ignore this letter. Your system is required to comply with
le listed below.
the new requirements based_on t_h_e~s~?
Important New Rule Roll Out
Laurel Municipal Water System
PO Box 10
Laurel MT 59044-0010
November 13, 2006
Stage 2 Disinfectants and Disinfection Byproduct Rule (Stage 2 DBPR) - Schedule 4
The Stage 2 DBPR was published in the Federal Register on January 4, 2006. The Stage 2 DBPR builds
on existing regulations by requiring water systems to meet disinfection byproduct maximum contaminant
levels 0VICLs) at each disinfection byproduct monitoring site in the distribution system to better protect
public health. In general, all community water systems (CWSs) and nontransient noncommunity water
systems (NTNCWSs) that use or deliver water treated with a primary or residual disinfectant other than
ultmvi61~t light ~r~ subject ~0 the' Stag~ 2 DBPR reqUireraent~: However; NTNCWS, serving less-than
10,000 people do not have to comply with the Initial Distribution System Evaluation (II)SE) part of the
Stage 2 DBPR (see below for an explanation oflDSE). Download an electronic copy of the Stage 2
DBPR from EPA's website at www.epa.gov/safewater/disinfection/stage2/regulations.html#mle
The first major requirement of the Stage 2 DBPR is for systems to conduct an IDSE. The purpose of the
IDSE is to identify locations in the distribution system that have the highest total trihalomethane (TTHM)
and highest haloacetic acid (I-IAA5) concentrations. The locations in the distribution system with the
highest TTHM and highest HAAS concentrations will be used as Stage 2 DBPR compliance monitoring
sites.
EPA and state records show that your system is required to comply with Schedule 4 IDSE
requirements. These requirements are based on the information that your system:
· Serves fewer than 10,000 people, and your system is not part of a combined distribution system where
another system serves 10,000 or more people; and
Provides water that has been treated with a primary or residual disinfectant other than ultraviolet light.
A combined distribution system is a group of water systems that buy/sell water from/to each other.
ff~eou believe~ur recordsm'e-incorree~please notify usa~ b~~ as~aqts~possibte.. ---
By April 1~ 2008, Schedule 4 systems will have to comply with IDSE requirements by submitting a
standard monitoring plan, system specific study plan, or a 40/30 certification.
EPA recommends systems interested in a 40/30 Certification should review a table posted on the Stage 2
DBPR website at: www.epa.~ov/safewater/disinfection/stage2/compliance.html to determine if your state
may require information in addition to what is specified in the rule.
Systems that serve less than 500 people and that have previously collected TTHM and HAA5 samples
may qualify for a very small system waiver and are exempt from this IDSE requirement, unless you hear
otherwise from your state or from EPA.
Enclosed is a Quick Reference Guide that provides information on the requirements of the Stage 2 DBPR.
In addition, EPA has developed a number of guidance documents and factsheets to help systems through
this process that may be found at: www.epa.gov/safewater/disinfection/stage2/compliance.btml
IDSE Guidance Material
The following materials only address the IDSE requirements and DO NOT cover other provisions of the
Stage 2 DBPR.
· Initial Distribution System Evaluation Guidance Manual For The Final Stage 2 Disinfectants
and Disinfection Byproducts Rule (EPA 815-B-06-002) - This manual is a comprehensive
technical guidance document for all system sizes and types and all IDSE options.
Initial Distribution System Evaluation Guide for Systems Serving < 10,000 People For The
Final Stage 2 Disinfectants and Disinfection Byproducts Rule - This manual focuses on
information that systems serving < 10,000 are most likely to use. It does not discuss the IDSE
system specific study option.
· IDSE Tool - A web-based tool guides the user through the IDSE submission process. A Wizard
reviews fi)SE options and recommends the best ]])SE option for your system. The fi)SE Tool
creates Custom Forms (based on population served and system type) your system can submit
electronically to EPA's Information Processing and Management Center for EPA/State review. A
web-based and downloadable version of the IDSE Tool is available on-line at
www.epa, gov/safewater/disinfection/tools/index.html).
· IDSE Factsheets - Three factsheets that summarize the four options systems may use to comply
with the fi)SE requirements. The factsheets are:
·Stage 2 DBPR fi)SE Standard Monitoring Factsheet
Stage 2 DBPR IDSE System Specific Study Factsheet
· Stage 2 DBPR IDSE 40/30 Certification and Very Small System Waiver Factsheet
Other Stage 2 DBPR Guidance Materials
For additional guidance on implementing the Stage 2 DBPR, you may refer to the following guidance
material located at: www.epa.gov/safewater/disinfection/stage2/compliance.html).
· Draft Simultaneous Compliance Guidance Manual
Your state may have state-specific materials to assist you in complying with the Stage 2 DBPR.
How to get copies of EPA guidance materials
To obtain copies of the materials listed above you can:
· Download from EPA's Website: www.epa.gov/safewater/disinfection/stage2/compliance.html.
· Call the Safe Drinking Water Hotline at 1-800-426-4791.
· Call the National Service Center for Environmental Publications at 1-800-490-9198 or visit their
web sit. at wwve. epa.gov/ncepihom, --
To determine if your state drinking water agency or EPA is implementing the Stage 2 DBPR you may
contact the Safe Drinking Water Hotline, or visit the Stage 2 DBPR website at
www.epa.gov/safewater/disinfection/stage2/comphance.html.
Training Opportunities
EPA will present wehcasts on the LT2ESWTR and Stage 2 DBPR and Compliance Assistance Tools for
Water Systems.
· Overview of the LT2ESWTR and Stage 2 DBPR on January 16 and 18, 2007
· Compliance Assistance Tools for Water Systems on January 23 and 25, 2007 '
These webcasts will be open to system operators and regulators. Registration information maybe found on
the Drinking Water Academy website at www.epa.gov/OGWDW/dwa/calendar.html.
Laurel Municipal Water System
PO Box 10
Please do not ignore this letter. Your system is required to comply with
the new r~ mire__ment~ based on the schedule listed below.
DEC 13 2006 ~
I__ November 13, 2006
Laurel Mr 59044-0010 CITY C) F L P, U R E L ,
,k,k~r Important New Rule Roll Out '/r'/r ~
Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) - Schedule 4
The LT2ESWTR was published in the Federal Register on January 5, 2006. The goal of the new
LT2ESWTR is to reduce the risk of disease caused by Cryptosporidiurn and other microorganisms by
identifying the systems at the greatest risk for source water contamination. EPA finalized both the
LT2ESWTR and the Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 DBPR) at the same
time. Together, these rules will improve protection against microbial contamination while reducing risks
..... from disinfectiorrbyproducts ................
Under the LT2ESWTR, many filtered systems will need to collect E. coli samples at least once every 2
weeks for 12 months fi.om every surface water or ground water under the direct influence of surface water
(GWUDI) source. These systems also have the option to skip E. coli monitoring and begin monitoring for
Cryptosporidiurn. IrE. coli sample results exceed specific levels the system will be required to either
monitor for Cryptosporidium at least twice per month for 12 months, or at least once per month for 24
months. However, if you already have monitoring data for these contaminants, you may be able to
"grandfather" the data.
Unfiltered systems serving less than 10,000 people are required to collect one Cryptosporidium sample at
least twice per month for 12 months, or at least once per month for 24 months. However, if you already
have monitoring data for Cryptosporidium, you may be able to "grandfather" the data.
Instead of conducting source water monitoring or submitting grandfathered data systems may choose to
provide the maximum treatment required by the LT2ESWTR. Download the LT2ESWTR from EPA's
website at www.epa.gov/safewater/disinfection/tt2/regulations.html#prepub.
EPA and state records show that your system is required to comply with the source water monitoring
requirements on-~hi~du~e~.. These req~irem~ase~Yon~ff/e~~ur s3~§tem:
· Serves less than 10,000 people and does not sell water to a system serving 10,000 or more people; and
· Treats surface water or GWUDI source.
If you believe our records are incorrect, or you have a question, please notify us at stage2mdbp~epa.gov
as soon as possible, or contact the "Contact Person" listed for your state at:
www.epa.gov/safewater/disinfection/lt2/pdfs/contacts It2 compliancehelp.pdf
By July 1~ 2008 (3 months prior to beginning source water monitoring), Schedule 4 systems will have to
submit to EPA a sampling Schedule and description of sample location(s), and/or provide a notice stating
your plan to submit grandfathered data, or a notice that you intend to provide additional treatment rather
than monitor source water.
Enclosed is a Quick Reference Guide that provides information on the requirements of the LT2ESWTR.
In addition, EPA has developed a number of guidance documents and factsheets to help systems through
this process that may be found at www.epa.gov/safewater/disinfection/lt2/compliance.html.
LT2ESWTR Guidance Material
· Source Water Monitoring Guidance Manual for Public Water Systems for the Long-Term 2
Enhanced Surface Water Treatment Rule (EPA 815-R-06-005) ~ Provides surface water
systems, laboratories, states, and Tribes with a review of the source water monitoring provisions.
This guidance manual provides direction to the systems regarding how, where, and when to
monitor, how to report the data, how to submit "grandfathered" data (e.g., previously collected
data), and how to evaluate data and determine risk bin classification for filtered systems and
treatment requirements for unfiltered systems.
· LT2ESWTR Faetsheets - EPA has developed several factsheets that summarize information on
various topics pertaining to the LT2ESWTR. The factsheets are:
· Factsheet: Source Water Monitoring for the LT2ESWTR: Systems Serving Less Than 10,000
People
· Long Term 2 Enhanced Surface Water Treatment Rule: Data Collection and Tracking System
· Long Term 2 Enhanced Surface Water Treatment Rule: Lab Fact Sheet
Other LT2ESWTR Guidance Materials
For additional guidance on implementing the LT2ESWTR, you can refer to the following EPA materials
located at: http://www.epa.gov/safewater/disinfection/It2/compliance.html.
· On-line Sample Collection Module (www.epa.gov/safewater/lt2/training/index.html).
Your state may have state-specific materials to assist you in complying with the LT2ESWTR.
Itow to get copies of EPA guidance materials
To obtain copies of the materials listed above you can:
· Download from EPA's Website: www.epa.gov/safewater/disinfection/lt2/compliance.html.
· Call the Safe Drinking Water Hotline at 1-800-426-4791.
· Call the National Service Center for Environmental Publications at 1-800-490-9198 or visit their
Web site at www.epa, gov/ncepihom.
To determineif ycmr~ate deimUdng water agency or EPA is implementing the LT2ESWTR you may'
contact the Safe Drinking Water Hotline, or visit the LT2ESWTR website at
www.epa, gov/safewater/disinfection/lt2/compliance.html.
Training Opportunities
EPA will present webcasts on the LT2ESWTR and Stage 2 DBPR and Compliance Assistance Tools for
Water Systems.
· Overview of the LT2ESWTR and Stage 2 DBPR on January 16 and 18, 2007
· Compliance Assistance Tools for Water Systems on January 23 and 25, 2007
These webcasts will be open to system operators and regulators. Registration information maybe found on
the Drinking Water Academy website at www.epa.gov/OGWDW/dwa/calendar.html.