35 Ill. Adm. Code 6110.611.384
Reporting and Recordkeeping Requirements
Section 611
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.384 REPORTING AND RECORDKEEPING REQUIREMENTS
Section 611.384 Reporting
and Recordkeeping Requirements
a) A supplier required to sample quarterly or more frequently
must report to the Agency within ten days after the end of each quarter in
which samples were collected, despite the provisions of Section 611.840. A
supplier required to sample less frequently than quarterly must report to the
Agency within ten days after the end of each monitoring period in which samples
were collected.
b) Disinfection Byproducts (DBPs). A supplier must report the following
specified information:
1) A
supplier that monitors for TTHMs and HAA5 under the requirements of Section
611.382(b) on a quarterly or more frequently basis must report the following:
A) The
number of samples taken during the last quarter;
B) The
location, date, and result of each sample taken during the last quarter;
C) The
arithmetic average of all samples taken over the last quarter;
D) The
annual arithmetic average of the quarterly arithmetic averages of this Section
for the last four quarters; and
E) Whether,
based on Section 611.383(b)(1), the MCL was violated.
2) A
supplier that monitors for TTHMs and HAA5 under the requirements of Section
611.382(b) less frequently than quarterly (but at least annually) must report
the following:
A) The
number of samples taken during the last year;
B) The location,
date, and result of each sample taken during the last monitoring period;
C) The
arithmetic average of all samples taken over the last year; and
D) Whether,
based on Section 611.383(b)(1), the MCL was violated.
3) A
supplier that monitors for TTHMs and HAA5 under the requirements of Section
611.382(b) less frequently than annually must report the following:
A) The
location, date, and result of the last sample taken; and
B) Whether,
based on Section 611.383(b)(1), the MCL was violated.
4) A supplier
that monitors for chlorite under the requirements of Section 611.382(b) must
report the following:
A) The
number of entry point samples taken each month for the last three months;
B) The
location, date, and result of each sample (both entry point and distribution
system) taken during the last quarter;
C) For
each month in the reporting period, the arithmetic average of
each three-sample set for all sample sets taken
in the distribution system
; and
D) Whether,
based on Section 611.383(b)(3), the MCL was violated, in which month it was
violated, and how many times it was violated in each month.
5) A supplier
that monitors for bromate under the requirements of Section 611.382(b) must
report the following:
A) The
number of samples taken during the last quarter;
B) The
location, date, and result of each sample taken during the last quarter;
C) The
arithmetic average of the monthly arithmetic averages of all samples taken in
the last year; and
D) Whether,
based on Section 611.383(b)(2), the MCL was violated.
BOARD NOTE: The
Agency may choose to perform calculations and determine whether the MCL was
exceeded, in lieu of having the supplier report the required information.
c) Disinfectants. A supplier must report the following specified
information:
1) A
supplier that monitors for chlorine or chloramines under the requirements of
Section 611.382(c) must report the following:
A) The
number of samples taken during each month of the last quarter.
B) The
monthly arithmetic average of all samples taken in each month for the last 12
months.
C) The
arithmetic average of all monthly averages for the last 12 months.
D) Whether,
based on Section 611.383(c)(1), the MRDL was violated.
2) A supplier
that monitors for chlorine dioxide under the requirements of Section 611.382(c)
must report the following:
A) The
dates, results, and locations of samples taken during the last quarter;
B) Whether,
based on Secton 611.383(c)(2), the MRDL was violated; and
C) Whether
the MRDL was exceeded in any two consecutive daily samples and whether the
resulting violation was acute or nonacute.
BOARD NOTE:
The Agency may choose to perform calculations and determine whether the MRDL
was exceeded, in lieu of having the supplier report the required information.
d) Disinfection Byproduct (DBP) Precursors and Enhanced
Coagulation or Enhanced Softening. A supplier must report the following
specified information:
1) A
supplier that monitors monthly or quarterly for TOC under the requirements of
Section 611.382(d) and required to meet the enhanced coagulation or enhanced
softening requirements in Section 611.385(b)(2) or (b)(3) must report the
following:
A) The
number of paired (source water and treated water) samples taken during the last
quarter;
B) The
location, date, and result of each paired sample and associated alkalinity
taken during the last quarter;
C) For
each month in the reporting period that paired samples were taken, the
arithmetic average of the percent reduction of TOC for each paired sample and
the required TOC percent removal;
D) Calculations
for determining compliance with the TOC percent removal requirements, as
provided in Section 611.385(c)(1); and
E) Whether
the supplier is in compliance with the enhanced coagulation or enhanced
softening percent removal requirements in Section 611.385(b) for the last four
quarters.
2) A
supplier that monitors monthly or quarterly for TOC under the requirements of
Section 611.382(d) and meeting one or more of the alternative compliance
standards in Section 611.385(a)(2) or (a)(3) must report the following:
A) The
alternative compliance criterion that the supplier is using;
B) The
number of paired samples taken during the last quarter;
C) The
location, date, and result of each paired sample and associated alkalinity
taken during the last quarter;
D) The
running annual arithmetic average based on monthly averages (or quarterly
samples) of source water TOC for a supplier meeting a criterion in Section
611.385(a)(2)(A) or (a)(2)(C) or of treated water TOC for a supplier meeting
the criterion in Section 611.385(a)(2)(B);
E) The
running annual arithmetic average based on monthly averages (or quarterly
samples) of source water SUVA for a supplier meeting the criterion in Section
611.385(a)(2)(E) or of treated water SUVA for a supplier meeting the criterion
in Section 611.385(a)(2)(F);
F) The
running annual average of source water alkalinity for a supplier meeting the
criterion in Section 611.385(a)(2)(C) and of treated water alkalinity for a
supplier meeting the criterion in Section 611.385(a)(3)(A);
G) The
running annual average for both TTHM and HAA5 for a supplier meeting the
criterion in Section 611.385(a)(2)(C) or (D);
H) The
running annual average of the amount of magnesium hardness removal (as CaCO
3
in mg/ℓ) for a supplier meeting the criterion in Section
611.385(a)(3)(B); and
I) Whether
the supplier is in compliance with the particular alternative compliance
criterion in Section 611.385(a)(2) or (a)(3).
BOARD NOTE: The Agency may choose to perform calculations and determine
whether the treatment technique was met, in lieu of having the supplier report
the required information.
BOARD NOTE:
Derived from 40 CFR 141.134.