Follow-up action is required according to the following tables: ------------------------------------------------------------------------
(a) The turbidity of an individual Report to the State by the 10th
filter (or the turbidity of combined of the following month and
filter effluent (CFE) for systems with include the filter number(s),
2 filters that monitor CFE in lieu of corresponding date(s),
individual filters) exceeds 1.0 NTU in turbidity value(s) which
two consecutive recordings 15 minutes exceeded 1.0 NTU, and the
apart. cause (if known) for the
exceedance(s).------------------------------------------------------------------------ ------------------------------------------------------------------------
If a system was required to report to
the State * * * Your system must * * *------------------------------------------------------------------------(b) For three months in a row and Conduct a self-assessment of
turbidity exceeded 1.0 NTU in two the filter(s) within 14 days
consecutive recordings 15 minutes of the day the filter exceeded
apart at the same filter (or CFE for 1.0 NTU in two consecutive
systems with 2 filters that monitor measurements for the third
CFE in lieu of individual filters). straight month unless a CPE as
specified in paragraph (c) of
this section was required.
Systems with 2 filters that
monitor CFE in lieu of
individual filters must
conduct a self assessment on
both filters. The self-
assessment must consist of at
least the following
components: assessment of
filter performance;
development of a filter
profile; identification and
prioritization of factors
limiting filter performance;
assessment of the
applicability of corrections;
and preparation of a filter
self-assessment report.(c) For two months in a row and Arrange to have a comprehensive
turbidity exceeded 2.0 NTU in 2 performance evaluation (CPE)
consecutive recordings 15 minutes conducted by the State or a
apart at the same filter (or CFE for third party approved by the
systems with 2 filters that monitor State not later than 60 days
CFE in lieu of individual filters). following the day the filter
exceeded 2.0 NTU in two
consecutive measurements for
the second straight month. If
a CPE has been completed by
the State or a third party
approved by the State within
the 12 prior months or the
system and State are jointly
participating in an ongoing
Comprehensive Technical
Assistance (CTA) project at
the system, a new CPE is not
required. If conducted, a CPE
must be completed and
submitted to the State no
later than 120 days following
the day the filter exceeded
2.0 NTU in two consecutive
measurements for the second
straight month.------------------------------------------------------------------------ [67 FR 1839, Jan. 14, 2002, as amended at 69 FR 38856, June 29, 2004]