|LT1ESWTR Fact Sheets
||The three fact sheets listed below are available on the eLibrary
They apply to filtered surface water systems
serving less than 10,000 people. The fact sheets provide
additional information on the turbidity requirements of the
- LT1ESWTR Compliance Approaches and Activities
- LT1ESWTR Filtration - Individual Filter Effluent (3800-FS-DEP2888,
- LT1ESWTR Filtration - Combined Filter Effluent (3800-FS-DEP2889,
|Disinfection Profiling As
Required by the Long Term 1 Enhanced Surface Water Treatment
Available on the eLibrary,
This file provides a simplified 11-step outline of the process
required to calculate log inactivations, also known as "CT calculations",
for surface water treatment plants disinfecting with chlorine.
These instructions are geared towards operators. The
instructions also explain the steps for creating a
disinfection profile and a disinfection benchmark.
Disinfection profiling and benchmarking is critical for
optimized operation of surface water treatment plants as well
as determining compliance with Pennsylvania Safe Drinking
Water Regulations. "Log Inactivation" calculations
are the key component of this type of profiling.
For water plants that prefer to use an electronic
calculator to calculate inactivation of Giardia, EPA has developed a
Disinfection Profiler Spreadsheet. Click here for more
|Checklist for Producing
Filter Profiles - LT1ESWTR
||Available on the eLibrary,
The Long Term 1 Enhanced Surface Water Treatment Rule
(LT1ESWTR) requires continuous individual filter turbidity
monitoring and recording for certain public water systems.
If any individual filter's turbidity exceeds certain trigger
levels, interpretation of filter profiles will be useful in
diagnosing possible causes of the exceedence. Water system
staff can use this checklist to help produce an accurate and
usable filter profile.
|Interpreting Filter Profiles
-or- Text version
This is a PowerPoint presentation that gives specific
guidance on interpreting filter profiles. Proper
interpretation of filter profiles will help to identify
causes of performance spikes.
|Individual Filter Follow-up
Activities Notification Form
||Available on the eLibrary, (3800-FM-WSWM0002 6/2003)
This form can be used to report the Interim Enhanced Surface
Water Treatment Rule (IESWTR) or the Long Term 1 Enhanced
Surface Water Treatment Rule (LT1ESWTR) individual filter
follow-up activities. Water systems must report certain
information to their DEP District Office either by phone,
fax, email or mail within the prescribed time frames.
District Office fax, phone and address information is
included on the back of this form.
Available on the eLibrary
(PDF File), (3800-BK-DEP2750 6/2004)
EPA's Interim Enhanced Surface Water Treatment Rule (IESWTR)
and Long Term 1 Enhanced Surface Water Treatment Rule
(LT1ESWTR) may require certain water systems to conduct a
filter self-assessment. This report includes an example of
an acceptable filter self-assessment report.
|LT1ESWTR External Links
Final LT1ESWTR (PA
Bulletin, Vol. 34, No. 25, Saturday, June 19, 2004)
Long Term 1 Enhanced Surface Water Treatment Rule was
published in the Pa Bulletin on June 19, 2004. The final-form
rulemaking pertains to public drinking water systems serving
less than 10,000 people that use either surface water sources
or groundwater sources under the direct influence of surface
water. The purpose of this rule is to provide Pennsylvanians
with a greater level of protection against waterborne,
disease-causing organisms such as Cryptosporidium, Giardia,
and other waterborne protozoa, bacteria or viruses.
This link will take you to EPA's website on the Long Term 1
Enhanced Surface Water Treatment Rule. You can view or
download technical guidance manuals, look at slide
presentations in the "Training Materials" section,
obtain fact sheets, see the federal version of the rules, and
learn more about ongoing microbial and disinfection byproducts