National Primary Drinking Water Regulations: Long Term 2 Enhanced Surface Water Treatment Rule

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

[Federal Register: August 11, 2003 (Volume 68, Number 154)]
[Proposed Rules]
[Page 47789-47795]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr11au03-42]

[[pp. 47789-47795]] National Primary Drinking Water Regulations: Long Term 2 Enhanced
Surface Water Treatment Rule

[[Continued from page 47788]]

[[Page 47789]]

conducted to verify any repairs, and the membrane unit may be returned
to service only if the direct integrity test is within the established
control limit.
(vi) Direct integrity testing must be conducted on each membrane
unit at a frequency of not less than once each day that the membrane
unit is in operation.
(4) Indirect integrity monitoring. Systems must conduct continuous
indirect integrity monitoring on each membrane unit according to the
criteria in paragraphs (b)(4)(i) through (b)(4)(v) of this section. A
system that implements continuous direct integrity testing of membrane
units in accordance with the criteria in paragraphs (b)(3)(i) through
(b)(3)(v) of this section is not subject to the requirements for
continuous indirect integrity monitoring.
(i) Unless the State approves an alternative parameter, continuous
indirect integrity monitoring must include continuous filtrate
turbidity monitoring.
(ii) Continuous monitoring must be conducted at a frequency of no
less than once every 15 minutes.
(iii) Continuous monitoring must be separately conducted on each
membrane unit.
(iv) If indirect integrity monitoring includes turbidity and if the
filtrate turbidity readings are above 0.15 NTU for a period greater
than 15 minutes (i.e., two consecutive 15-minute readings above 0.15
NTU), direct integrity testing must be performed on the associated
membrane units as specified in paragraphs (b)(3)(i) through (b)(3)(v)
of this section.
(v) If indirect integrity monitoring includes a State-approved
alternative parameter and if the alternative parameter exceeds a State-
approved control limit for a period greater than 15 minutes, direct
integrity testing must be performed on the associated membrane units as
specified in paragraphs (b)(3)(i) through (b)(3)(v) of this section.
(c) Second stage filtration. Systems are eligible for an additional
0.5 log Cryptosporidium removal credit if they have a separate second
stage filtration process consisting of rapid sand, dual media, GAC, or
other fine grain media in a separate stage following rapid sand or dual
media filtration. To be eligible for this credit, the first stage of
filtration must be preceded by a coagulation step and both filtration
stages must treat 100% of the flow. A cap, such as GAC, on a single
stage of filtration is not eligible for this credit.
(d) Slow sand filtration. Systems may claim a 2.5 log
Cryptosporidium removal credit for a slow sand filtration process that
follows another separate filtration process if all the flow is treated
by both processes and no disinfectant residual is present in the
influent water to the slow sand filtration process.

Sec. 141.729 Inactivation toolbox components.

(a) Calculation of CT values. (1) CT is the product of the
disinfectant contact time (T, in minutes) and disinfectant
concentration (C, in milligrams per liter). Systems must calculate CT
at least once each day, with both C and T measured during peak hourly
flow as specified in Sec. Sec. 141.74(a) and 141.74(b).
(2) Systems with several disinfection segments (a segment is
defined as a treatment unit process with a measurable disinfectant
residual level and a liquid volume) in sequence along the treatment
train, may calculate the CT for each disinfection segment and use the
sum of the Cryptosporidium log inactivation values achieved through the
plant.
(b) CT values for chlorine dioxide. (1) Systems using chlorine
dioxide must calculate CT in accordance with Sec. 141.729(a).
(2) Unless the State approves alternative CT values for a system
under paragraph (b)(3) of this section, systems must use the following
table to determine Cryptosporidium log inactivation credit:

CT Values for Cryptosporidium Inactivation by Chlorine Dioxide
--------------------------------------------------------------------------------------------------------------------------------------------------------
Water Temperature, [deg] C \1\
Log credit -------------------------------------------------------------------------------------------------------------
<=0.5 1 2 3 5 7 10 15 20 25
--------------------------------------------------------------------------------------------------------------------------------------------------------
0.5....................................... 319 305 279 256 214 180 138 89 58 38
1.0....................................... 637 610 558 511 429 360 277 179 116 75
1.5....................................... 956 915 838 767 643 539 415 268 174 113
2.0....................................... 1275 1220 1117 1023 858 719 553 357 232 150
2.5....................................... 1594 1525 1396 1278 1072 899 691 447 289 188
3.0....................................... 1912 1830 1675 1534 1286 1079 830 536 347 226
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ CT values between the indicated temperatures may be determined by interpolation.

CT Values for Cryptosporidium Inactivation by Ozone
--------------------------------------------------------------------------------------------------------------------------------------------------------
Water Temperature, [deg]C1 \1\
Log credit -------------------------------------------------------------------------------------------------------------------
<=0.5 1 2 3 5 7 10 15 20 25
--------------------------------------------------------------------------------------------------------------------------------------------------------
0.5................................. 12 12 10 9.5 7.9 6.5 4.9 3.1 2.0 1.2
1.0................................. 24 23 21 19 16 13 9.9 6.2 3.9 2.5
1.5................................. 36 35 31 29 24 20 15 9.3 5.9 3.7
2.0................................. 48 46 42 38 32 26 20 12 7.8 4.9
2.5................................. 60 58 52 48 40 33 25 16 9.8 6.2

[[Page 47790]]

3.0................................. 72 69 63 57 47 39 30 19 12 7.4
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ CT values between the indicated temperatures may be determined by interpolation

(3) Systems may conduct a site-specific inactivation study to
determine the CT values necessary to meet a specified Cryptosporidium
log inactivation level, using a State-approved protocol. The
alternative CT values determined from the site-specific study and the
method of calculation must be approved by the State.
(d) Ultraviolet light. (1) Systems may claim credit for ultraviolet
(UV) processes for inactivation of Cryptosporidium, Giardia lamblia,
and viruses. The allowable inactivation credit for each pathogen must
be based on the UV dose delivered by the system's UV reactors in
relation to the UV dose table in paragraph (d)(2) of this section.
(2) UV dose table. The log credits given in this UV dose table are
for UV light at a wavelength of 254 nm as produced by a low pressure
mercury vapor lamp. Systems may apply this table to UV reactors with
other lamp types through reactor validation testing (i.e., performance
demonstration) as described in paragraph (d)(3) of this section. The UV
dose values in this table are applicable only to post-filter
application of UV in systems that filter under subpart H of this part
and to unfiltered systems meeting the filtration avoidance criteria in
subparts H, P, and T of this part:

UV Dose Table for Cryptosporidium, Giardia Lamblia, and Virus Inactivation Credit
----------------------------------------------------------------------------------------------------------------
Cryptosporidium Giardia lamblia
Log credit UV Dose (mJ/cm UV dose (mJ/cm Virus UV dose
\2\) \2\) (mJ/cm \2\)
----------------------------------------------------------------------------------------------------------------
0.5........................................................... 1.6 1.5 39
1.0........................................................... 2.5 2.1 58
1.5........................................................... 3.9 3.0 79
2.0........................................................... 5.8 5.2 100
2.5........................................................... 8.5 7.7 121
3.0........................................................... 12 11 143
3.5........................................................... NA NA 163
4.0........................................................... NA NA 186
----------------------------------------------------------------------------------------------------------------

(3) Reactor validation testing. For a system to receive
inactivation credit for a UV reactor, the reactor must undergo the
validation testing in paragraphs (d)(3)(i) and (d)(3)(ii) of this
section, unless the State approves an alternative approach. The
validation testing must demonstrate the operating conditions under
which the reactor can deliver the UV dose required in paragraph (d)(2)
of this section.
(i) Validation testing of UV reactors must determine a range of
operating conditions that can be monitored by the system and under
which the reactor delivers the required UV dose. At a minimum, these
operating conditions must include flow rate, UV intensity as measured
by a UV sensor, and UV lamp status. The validated operating conditions
determined by this testing must account for the following: UV
absorbance of the water; lamp fouling and aging; measurement
uncertainty of on-line sensors; UV dose distributions arising from the
velocity profiles through the reactor; failure of UV lamps or other
critical system components; and inlet and outlet piping or channel
configurations of the UV reactor.
(ii) Validation testing must include the following: full scale
testing of a reactor that conforms uniformly to the UV reactors used by
the system; and inactivation of a test microorganism whose dose
response characteristics have been quantified with a low pressure
mercury vapor lamp.
(4) Reactor monitoring. Systems must monitor their UV reactors to
demonstrate that they are operating within the range of conditions that
were validated by the testing described in paragraphs (d)(3)(i) and
(d)(3)(ii) of this section to achieve the required UV dose in paragraph
(d)(2) of this section. Systems must monitor for UV intensity as
measured by a UV sensor, flow rate, and lamp outage and for any other
parameters required by the State. Systems must verify the calibration
of UV sensors and must recalibrate sensors in accordance with a
protocol approved by the State.

Reporting and Recordkeeping Requirements

Sec. 141.730 Reporting requirements.

(a) Systems must follow the requirements for reporting sampling
schedules under Sec. 141.703 and for reporting source water monitoring
results under Sec. 141.707 unless they notify the State that they will
not conduct source water monitoring due to meeting the criteria of
Sec. 141.701(f) or (g).
(b) Systems using uncovered finished water storage facilities must
notify the State of the use of each facility no later than [Date 24
Months After Date of Publication of Final Rule in the Federal
Register].
(c) Filtered systems and unfiltered systems that are required to
install filtration must report their Cryptosporidium bin
classification, as determined under using the procedures in Sec.
141.709, to the State by the applicable dates in paragraph (c)(1) or
(2) of this section.
(1) Systems that serve at least 10,000 people must report their
initial bin classification no later than [Date 36 Months After Date of
Publication of Final Rule in the Federal Register] and must report
their bin classification determined using results from the second round
of source water monitoring no later than [Date 138 Months After Date of
Publication of Final Rule in the Federal Register].

[[Page 47791]]

(2) Systems that serve fewer than 10,000 people must report their
initial bin classification no later than [Date 66 Months After Date of
Publication of Final Rule in the Federal Register] and must report
their bin classification determined using results from the second round
of source water monitoring no later than [Date 174 Months After Date of
Publication of Final Rule in the Federal Register].
(d) Unfiltered systems that meet all filtration avoidance criteria
of Sec. 141.71 must report their mean Cryptosporidium concentration,
as determined under Sec. 141.721, to the State by the applicable dates
in paragraph (d)(1) or (2) of this section.
(1) Systems that serve at least 10,000 people must report their
initial mean Cryptosporidium concentration no later than [Date 36
Months After Date of Publication of Final Rule in the Federal Register]
and must report their mean Cryptosporidium concentration determined
using results from the second round of source water monitoring no later
than [Date 138 Months After Date of Publication of Final Rule in the
Federal Register].
(2) Systems that serve fewer than 10,000 people must report their
initial mean Cryptosporidium concentration no later than [Date 66
Months After Date of Publication of Final Rule in the Federal Register]
and must report their mean Cryptosporidium concentration determined
using results from the second round of source water monitoring no later
than [Date 174 Months After Date of Publication of Final Rule in the
Federal Register].
(e) Systems must report to the State in accordance with the
following table in this paragraph for any toolbox options used to
comply with the Cryptosporidium treatment technique requirements under
Sec. 141.720 or Sec. 141.721. The State may place additional
reporting requirements it determines to be necessary to verify
operation in accordance with required criteria for all toolbox options:

Microbial Toolbox Reporting Requirements
----------------------------------------------------------------------------------------------------------------
On the following
Systems must submit schedule\1\ --systems On the following
Toolbox option the following serving £= schedule\1\--systems
information 10,000 people serving < 10,000 people
----------------------------------------------------------------------------------------------------------------
(1) Watershed control program (WCP) (i) Notify State of No later than [Date 48 No later than [Date 78
intention to develop Months After Date of Months After Date of
WCP. Publication of Final Publication of Final Rule
Rule in the Federal in the Federal Register].
Register].
(ii) Submit initial No later than [Date 60 No later than [Date 90
WCP plan to State. Months After Date of Months After Date of
Publication of Final Publication of Final Rule
Rule in the Federal in the Federal Register].
Register].
(iii) Annual report By a date determined By a date determined by the
and State-approved by the State, every State, every 12 months,
watershed survey 12 months, beginning beginning on [Date 114
report. on [Date 84 Months Months After Date of
After Date of Publication of Final Rule
Publication of Final in the Federal Register].
Rule in the Federal
Register].
(iv) Request for re- Six months prior to Six months prior to the end
approval and report the end of the of the current approval
on the previous current approval period or by a date
approval period. period or by a date previously determined by
previously determined the State.
by the State.
(2) Bank filtration................ (i) Initial Initial demonstration Initial demonstration no
demonstration of the no later than [Date later than [Date 102
following: 72 Months after Date Months after Date of
unconsolidated, of Publication of Publication of Final Rule
predominantly sandy Final Rule in the in the Federal Register].
aquifer and setback Federal Register].
distance of at least
25 ft. (0.5 log
credit) or 50 ft.
(1.0 log credit).
(ii) If monthly Report within 30 days Report within 30 days
average of daily max following the month following the month in
turbidity is greater in which the which the monitoring was
than 1 NTU then monitoring was conducted, beginning on
system must report conducted, beginning [Date 102 Months After
result and submit an on [Date 72 Months Date of Publication of
assessment of the After Date of Final Rule in the Federal
cause. Publication of Final Register].
Rule in the Federal
Register].
(3) Presedimentation............... Monthly verification Monthly reporting Monthly reporting within 10
of the following; within 10 days days following the month
Continuous basin following the month in which the monitoring
operation; treatment in which the was conducted, beginning
of 100% of the flow; monitoring was on [Date 102 Months After
continuous addition conducted, beginning Date of Publication of
of a coagulant; and on [Date 72 Months Final Rule in the Federal
at least 0.5 log After Date of Register].
removal of influent Publication of Final
turbidity based on Rule in the Federal
the monthly mean of Register].
daily turbidity
readings for 11 of
the 12 previous
months.
(4) Two-sage lime softening........ Monthly verification Monthly reporting Monthly reporting within 10
of the following: within 10 days days following the month
Continuous operation following the month in which the monitoring
of a second in which the was conducted, beginning
clarification step monitoring was on [Date 102 Months After
between the primary conducted, beginning Date of Publication of
clarifier and filter; on [Date 72 Months Final Rule in the Federal
continuous presence After Date of Register].
of a coagulant in Publication of Final
both primary and Rule in the Federal
secondary clarifiers; Register].
and both clarifiers
treated 100% of the
plant flow.

[[Page 47792]]

(5) Combined filter performance.... Monthly verification Monthly reporting Monthly reporting within 10
of combined filter within 10 days days following the month
effluent (CFE) following the month in which the monitoring
turbidity levels less in which the was conducted, beginning
than or equal to 0.15 monitoring was on [Date 102 Months After
NTU in at least 95 conducted, beginning Date of Publication of
percent of the 4 hour on [Date 72 Months Final Rule in the Federal
CFE measurements After Date of Register].
taken each month. Publication of Final
Rule in the Federal
Register].
(6) Individual filter performance.. Monthly verification Monthly reporting Monthly reporting within 10
of the following: within 10 days days following the month
Individual filter following the month in which the monitoring
effluent (IFE) in which the was conducted, beginning
turbidity levels less monitoring was on [Date 102 Months After
than or equal to 0.1 conducted, beginning Date of Publication of
NTU in at least 95 on [Date 72 Months Final Rule in the Federal
percent of all daily After Date of Register].
maximum IFE Publication of Final
measurements taken Rule in the Federal
each month (excluding Register].
15 min period
following start-up
after backwash); and
no individual filter
greater than 0.3 NTU
in two consecutive
readings 15 minutes
apart.
(7) Membrane filtration............ (i) Results of No later than [Date 72 No later than [Date 102
verification testing Months After Date of Months After Date of
demonstrating the Publication of Final Publication of Final Rule
following: Removal Rule in the Federal in the Federal Register].
efficiency Register].
established through
challenge testing
that meets criteria
in this subpart; and
integrity testing and
associated baseline.
(ii) Monthly report Within 10 days Within 10 days following
summarizing all following the month the month in which
direct integrity in which monitoring monitoring was conducted,
tests above the was conducted, beginning [Date 102 Months
control limit and, if beginning [Date 72 After Date of Publication
applicable, any Months After Date of of Final Rule in the
indirect integrity Publication of Final Federal Register].
monitoring results Rule in the Federal
triggering direct Register].
integrity testing and
the corrective action
that was taken.
(8) Bag filters and cartridge (i) Demonstration that No later than [Date 72 No later than [Date 102
filters. the following Months After Date of Months After Date of
criteria are met: Publication of Final Publication of Final Rule
process meets the Rule in the Federal in the Federal Register].
definition of bag or Register].
cartridge filtration;
removal efficiency
established through
challenge testing
that meets criteria
in this subpart; and
challenge test shows
at least 2 log
removal for bag
filters and 3 log
removal for cartridge
filters.
(ii) Monthly Within 10 days Within 10 days following
verification that following the month the month in which
100% of flow was in which monitoring monitoring was conducted,
filtered. was conducted, beginning [Date 102 Months
beginning [Date 72 After Date of Publication
Months After Date of of Final Rule in the
Publication of Final Federal Register].
Rule in the Federal
Register].
(9) Second stage filtration........ Monthly verification Within 10 days Within 10 days following
that 100% of flow was following the month the month in which
filtered through both in which monitoring monitoring was conducted,
stages. was conducted, beginning [Date 102 Months
beginning [Date 72 After Date of Publication
Months After Date of of Final Rule in the
Publication of Final Federal Register].
Rule in the Federal
Register].
(10) Slow and filtration........... Monthly verification Within 10 days Within 10 days following
that 100% of flow was following the month the month in which
filtered. in which monitoring monitoring was conducted,
was conducted, beginning [Date 102 Months
beginning [Date 72 After Date of Publication
Months After Date of of Final Rule in the
Publication of Final Federal Register].
Rule in the Federal
Register].
(11) Chlorine dioxide.............. Summary of CT values Within 10 days Within 10 days following
for each day based on following the month the month in which
Table in Sec. in which monitoring monitoring was conducted,
141.729(b). was conducted, beginning [Date 102 Months
beginning [Date 72 After Date of Publication
Months After Date of of Final Rule in the
Publication of Final Federal Register].
Rule in the Federal
Register].

[[Page 47793]]

(12) Ozone......................... Summary of CT values Within 10 days Within 10 days following
for each day based on following the month the month in which
Table in Sec. in which monitoring monitoring was conducted,
141.729(c). was conducted, beginning [Date 102 Months
beginning [Date 72 After Date of Publication
Months After Date of of Final Rule in the
Publication of Final Federal Register].
Rule in the Federal
Register].
(13) UV............................ (i) Validation test No later than [Date 72 No later than [Date 102
results demonstrating Months After Date of Months After Date of
operating conditions Publication of Final Publication of Final Rule
that achieve required Rule in the Federal in the Federal Register].
UV dose. Register].
(ii) Monthly report Within 10 days Within 10 days following
summarizing the following the month the month in which
percentage of water in which monitoring monitoring was conducted,
entering the was conducted, beginning [Date 102 Months
distribution system beginning [Date 72 After Date of Publication
that was not treated Months After Date of of Final Rule in the
by UV reactors Publication of Final Federal Register].
operating within Rule in the Federal
validated conditions Register].
for the required dose
as specified in Sec.
141.729(d).
(14) Demonstration of performance.. (i) Results from No later than [Date 72 No later than [Date 102
testing following a Months After Date of Months After Date of
State approved Publication of Final Publication of Final Rule
protocol. Rule in the Federal in the Federal Register].
Register].
(ii) As required by Within 10 days Within 10 days following
the State, monthly following the month the month in which
verification of in which monitoring monitoring was conducted,
operation within was conducted, beginning [Date 102 Months
conditions of State beginning [Date 72 After Date of Publication
approval for Months After Date of of Final Rule in the
demonstration of Publication of Final Federal Register].
performance credit. Rule in the Federal
Register].
----------------------------------------------------------------------------------------------------------------
\1\ States may allow up to an additional two years to the date when the first submittal must be completed for
systems making capital improvements.

(f) Systems must report to the State the information associated
with disinfection profiling and benchmarking requirements of Sec. Sec.
141.711 to 141.714 in accordance with the tables in this paragraph.

Table 1.--Disinfection Profiling Reporting Requirements for Large Systems
[Serving £=10,000 people]
----------------------------------------------------------------------------------------------------------------
Submit the following On the following
System type Benchmark component items schedule
----------------------------------------------------------------------------------------------------------------
(1) Systems required to conduct (i) Characterization of Giardia lamblia and No later than [Date 36
Cyrptosporidium monitoring. disinfection virus inactivation Months After Date of
practices. See Sec. profiles must be on Publication of Final
141.713. file for State review Rule in the Federal
during sanitary survey. Register].
(ii) State review of Inactivation profile Prior to significant
proposed significant and benchmark modification of
changes to determinations. disinfection practice.
disinfection practice.
See Sec. 141.714.
(2) Systems not required to conduct (i) Applicability...... None................... None.
Cryptosporidium monitoring \a\.
(ii) Characterization None................... None.
of Disinfection
Practices.
(iii) State Review of None................... None.
Proposed Changes to
Disinfection Practices.
----------------------------------------------------------------------------------------------------------------
\a\Systems that provide at least 5.5 log of Cryptosporidium treatment, consistent with a Bin 4 treatment
requirement, are not required to conduct Cryptosporidium monitoring.

Table 2.--Disinfection Profiling Reporting Requirements for Small Systems
[Serving < 10,000 people]
----------------------------------------------------------------------------------------------------------------
Submit the following On the following
System type Benchmark component items schedule
----------------------------------------------------------------------------------------------------------------
(1) Systems required to conduct (i) Characterization of Giardia lamblia and No later than [Date 66
Cryptosporidium monitoring. disinfection virus disinfection Months After Date of
practices. See Sec. profiles must be on Publication of Final
141.713. file for State review Rule in the Federal
during sanitary survey. Register].

[[Page 47794]]

(ii) State review of Disinfection profiles Prior to significant
proposed significant and benchmark modification of
changes to determinations. disinfection practice.
disinfection
practices. See Sec.
141.714.
(2) Systems not required to conduct (i) Determination of Report on TTHM and HAA5 No later than [Date 42
Cryptosporidium monitoring and that requirement to LRAA values from Months After Date of
exceed DBP triggers ^a,b,c. profile. See Sec. monitoring under Publication of Final
141.711(b). subpart L. Rule in the Federal
Register].
(ii) Characterization Giardia lambia and No later than [Date 54
of disinfection virus disinfection Months after Date of
practices. See Sec. profiles must be on Publication of Final
141.713. file for State review Rule in the Federal
during sanitary survey. Register].
(iii) State review of Disinfection profiles Prior to significant
proposed significant and benchmark modification of
changes to determinations. disinfection practice.
disinfection
practices. See Sec.
141.714.
(3) Systems not required to conduct (i) Determination of no Report on TTHM and HAA5 No later than [Date 42
Cryptosporidium monitoring and that requirement to LRAA values from Months After Date of
do not exceed DBP triggers \b,c\. profile. See Sec. monitoring under Publication of Final
141.711(b). subpart L. Rule in the Federal
Register].
(ii) Characterization None................... None.
of disinfection
practices. See Sec.
141.713.
(iii) State review of None................... None.
proposed significant
changes to
disinfection practice.
See Sec. 141.714.
----------------------------------------------------------------------------------------------------------------
\a\ Systems that provide at least 5.5 log of Cryptosporidium treatment, consistent with a Bin 4 treatment
requirement, are not required to conduct Cryptosporidium monitoring.
\b\ See Sec. 141.702(b) to determine if Cryptosporidium monitoring is required.
\c\ See Sec. 141.711(b) to determine if disinfection profiling is required based on TTHM or HAA5 LRAA.

Sec. 141.731 Recordkeeping requirements.

(a) Systems must keep results from monitoring required under Sec.
141.702 until 36 months after all source water monitoring required
under this section has been completed.
(b) Systems must keep a record of any notification to the State
that they will not conduct source water monitoring due to meeting the
criteria of Sec. 141.701(f) or (g).
(c) Systems required to develop disinfection profiles under Sec.
141.711 must keep disinfection profiles on file for State review during
sanitary surveys.

PART 142--NATIONAL PRIMARY DRINKING WATER REGULATIONS
IMPLEMENTATION

5. The authority citation for part 142 continues to read as
follows:

Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-
5, 300g-6, 300j-4, 300j-9 and 300j-11.

6. Section 142.14 is amended by adding paragraphs (a)(8) and (a)(9)
to read as follows:

Sec. 142.14 Records kept by States.

* * * * *
(a) * * *
(8) [Reserved]
(9) Any decisions made pursuant to the provisions of part 141,
subpart W of this chapter.
(i) Results of source water E. coli and Cryptosporidium monitoring.
(ii) Initial bin classification for each system that currently
provides filtration or that is unfiltered and required to install
filtration, along with any change in bin classification due to
watershed assessment during sanitary surveys or the second round of
source water monitoring.
(iii) A determination of whether each system that is unfiltered and
meets all the filtration avoidance criteria of Sec. 141.71 of this
chapter has a mean source water Cryptosporidium level above 0.01
oocysts/L, along with any changes in this determination due to the
second round of source water monitoring.
(iv) The treatment or control measures that systems use to meet
their Cryptosporidium treatment requirements under Sec. 141.720 or
Sec. 141.721 of this section.
(v) A list of systems required to cover or treat the effluent of an
uncovered finished water reservoir.
(vi) A list of systems for which the State has waived the
requirement to cover or treat the effluent of uncovered finished water
storage facilities and supporting documentation of the risk mitigation
plan.
* * * * *
7. Section 142.15 is amended by adding paragraph (c)(6) to read as
follows:

Sec. 142.15 Reports by States.

(c) * * *
(6) Subpart W. (i) The initial bin classification for each system
that currently provides filtration or that is unfiltered and required
to install filtration, along with any change in bin classification due
to watershed assessment during sanitary surveys or the second round of
source water monitoring.
(ii) A determination of whether each system that is unfiltered and
meets all the filtration avoidance criteria of Sec. 141.71 of this
chapter has a mean source water Cryptosporidium level above 0.01
oocysts/L, along with any changes in this determination due to the
second round of source water monitoring.
* * * * *
8. Section 142.16 is amended by adding paragraphs (m) and (n) to
read as follows:

Sec. 142.16 Special primacy conditions.

* * * * *
(m) [Reserved]
(n) Requirements for States to adopt 40 CFR part 141, subpart W. In
addition to the general primacy requirements elsewhere in this part,
including the requirements that State regulations be at least as
stringent as federal requirements, an application for approval of a
State program revision that adopts 40 CFR part 141, subpart W,

[[Page 47795]]

must contain a description of how the State will accomplish the
following program requirements where allowed in State programs.
(1) Assess significant changes in the watershed and source water as
part of the sanitary survey process and determine appropriate follow-up
action.
(2) Approve watershed control programs for the 0.5 log watershed
control program credit in the microbial toolbox.
(3) Approval protocols for treatment credits under the
Demonstration of Performance toolbox option and for alternative ozone
and chlorine dioxide CT values.
(4) Determine that a system with an uncovered finished water
reservoir has a risk mitigation plan that is adequate for purposes of
waiving the requirement to cover or treat the reservoir.

[FR Doc. 03-18295 Filed 8-8-03; 8:45 am]
BILLING CODE 6560-50-P

Notices For
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994

National Primary Drinking Water Regulations: Long Term 2 Enhanced Surface Water Treatment Rule

Local Navigation