[Code of Federal Regulations]
[Title 40, Volume 19]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR141.35]
[Page 406-409]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 141--NATIONAL PRIMARY DRINKING WATER REGULATIONS--Table of Contents
Subpart D--Reporting and Recordkeeping
Sec. 141.35 Reporting of unregulated contaminant monitoring results.
(a) Does this reporting apply to me? (1) This section applies to any
owner or
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operator of a public water system required to monitor for unregulated
contaminants under Sec. 141.40. This section requires you to report the
results of this monitoring.
(2) Exception. You do not need to report results if you are a system
serving a population of 10,000 or less, since EPA will arrange for
testing and reporting of the results. However, you will still need to
comply with consumer confidence reporting and public notification
requirements for these results.
(b) To whom must I report? You must report the results of
unregulated contaminant monitoring to EPA and provide a copy to the
State. You must also notify the public of the monitoring results as
provided in Subpart O (Consumer Confidence Reports) and Subpart Q
(Public Notification) of this part.
(c) When must I report monitoring results? You must report the
results of unregulated contaminant monitoring within thirty (30) days
following the month in which you received the results from the
laboratory. EPA will conduct its quality control review of the data for
sixty (60) days after you report the data, which will also allow for
quality control review by systems and States. After the quality control
review, EPA will place the data in the national drinking water
contaminant occurrence database at the time of the next database update.
Exception: Reporting to EPA of monitoring results received by public
water systems prior to May 13, 2002, must occur by August 9, 2002.
(d) What information must I report? (1) You must provide the
following ``point of contact'' information: name, mailing address, phone
number, and e-mail address for:
(i) PWS Technical Contact, the person at your PWS that is
responsible for the technical aspects of your unregulated contaminant
monitoring regulation (UCMR) activities, such as details concerning
sampling and reporting;
(ii) PWS Official, the person at your PWS that is able to function
as the official spokesperson for your UCMR activities; and
(iii) Laboratory Contact Person, the person at your laboratory that
is able to address questions concerning the analysis that they provided
for you.
(2) You must update this information if it changes during the course
of UCMR implementation.
(3) You must report the information specified for data elements 1
through 16 in the following table for each sample.
Table 1.--Unregulated Contaminant Monitoring Reporting Requirements
------------------------------------------------------------------------
Data Element Definition
------------------------------------------------------------------------
1. Public Water System (PWS) The code used to identify each PWS. The
Identification Number. code begins with the standard two-
character postal State abbreviation; the
remaining seven characters are unique to
each PWS.
2. Public Water System The Sampling point identification number
Facility Identification and sampling point type identification
Number--Sampling Point must either be static or traceable to
Identification Number and previous numbers and type
Sampling Point Type identifications throughout the period of
Identification. unregulated contaminant monitoring. The
Sampling point identification number is
a three-part alphanumeric designation,
made up of:
a. The Public Water System Facility
Identification Number is an
identification number established by the
State, or at the State's discretion the
PWS, that is unique to the PWS for an
intake for each source of water, a
treatment plant, a distribution system,
or any other facility associated with
water treatment or delivery and provides
for the relationship of facilities to
each other to be maintained;
b. The Sampling Point Identification
Number is an identification number
established by the State, or at the
State's discretion the PWS, that is
unique to each PWS facility that
identifies the specific sampling point
and allows the relationship of the
sampling point to other facilities to be
maintained; and
c. Sampling Point Type Identification is
one of following:
SR--Untreated water collected at the
source of the water system facility.
EP--Entry point to the distribution
system.
MD--midpoint in the distribution system
where the disinfectant residual would be
expected to be typical for the system
such as the location for sampling
coliform indicator bacteria as described
in 40 CFR 141.21.
MR--point of maximum retention is the
point located the furthest from the
entry point to the distribution system
which is approved by the State for
trihalomethane (THM) (disinfectant
byproducts (DBP)) and/or total coliform
sampling.
LD--location in the distribution system
where the disinfectant residual is the
lowest which is approved by the State
for THM (DBP) and/or total coliform
sampling.
3. Sample Collection Date.... The date the sample is collected reported
as 4-digit year, 2-digit month, and 2-
digit day.
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4. Sample Identification An alphanumeric value of up to 15
Number. characters assigned by the laboratory to
uniquely identify containers or groups
of containers containing water samples
collected at the same time and sampling
point.
5. Contaminant/Parameter..... The unregulated contaminant or water
quality parameter for which the sample
is being analyzed.
6. Analytical Results--Sign.. An alphanumeric value indicating whether
the sample analysis result was:
a. (<) ``less than'' means the
contaminant was not detected or was
detected at a level ``less than'' the
MRL.
b. (=) ``equal to'' means the contaminant
was detected at a level ``equal to'' the
value reported in ``Analytical Result--
Value.''
7. Analytical Result--Value.. The actual numeric value of the analysis
for chemical and microbiological
results, or the minimum reporting level
(MRL) if the analytical result is less
than the contaminant's MRL.
8. Analytical Result--Unit of The unit of measurement for the
Measure. analytical results reported. [e.g.,
micrograms per liter, ([mu]g/L); colony-
forming units per 100 milliliters, (CFU/
100 mL), etc.]
9. Analytical Method Number.. The identification number of the
analytical method used.
10. Sample Analysis Type..... The type of sample collected. Permitted
values include:
a. RFS--Raw field sample--untreated
sample collected and submitted for
analysis under this rule.
b. RDS--Raw duplicate field sample--
untreated field sample duplicate
collected at the same time and place as
the raw field sample and submitted for
analysis under this rule.
c. TFS--Treated field sample--treated
sample collected and submitted for
analysis under this rule.
d. TDS--Treated duplicate field sample--
treated field sample duplicate collected
at the same time and place as the
treated field sample and submitted for
analysis under this rule.
11. Sample Batch The sample batch identification number
Identification Number. consists of three parts:
a. Up to a 10-character laboratory
identification code assigned by EPA.
b. Up to a 15-character code assigned by
the laboratory to uniquely identify each
extraction or analysis batch.
c. The date that the samples contained in
each extraction batch extracted or in an
analysis batch were analyzed, reported
as an 8-digit number in the form 4-digit
year, 2-digit month, and 2-digit day.
12. Minimum Reporting Level.. Minimum Reporting Level (MRL) refers to
the lowest concentration of an analyte
that may be reported. Unregulated
contaminant monitoring (UCM) MRLs are
established in Sec. 141.40 monitoring
requirements for unregulated
contaminants.
13. Minimum Reporting Level The unit of measure to express the
Unit of Measure. concentration, count, or other value of
a contaminant level for the Minimum
Reporting Level reported. (e.g., [mu]g/
L, colony forming units/100 mL (CFU/100
mL), etc.).
14. Analytical Precision..... Precision is the degree of agreement
between two repeated measurements and is
monitored through the use of duplicate
spiked samples. For purposes of the
Unregulated Contaminant Monitoring
Regulation (UCMR), Analytical Precision
is defined as the relative percent
difference (RPD) between spiked matrix
duplicates. The RPD for the spiked
matrix duplicates analyzed in the same
batch of samples as the analytical
result being reported is to be entered
in this field. Precision is calculated
as Relative Percent Difference (RPD) of
spiked matrix duplicates from the mean
using:
RPD = absolute value of [(X1--X2) /(X1
+X2)/2 ] x 100%.
where:
X1 is the concentration observed in
spiked field sample minus the
concentration observed in unspiked field
sample.
X2 is the concentration observed in
duplicate spiked field sample minus the
concentration observed in unspiked field
sample.
15. Analytical Accuracy...... Accuracy describes how close a result is
to the true value measured through the
use of spiked field samples. For
purposes of unregulated contaminant
monitoring, accuracy is defined as the
percent recovery of the contaminant in
the spiked matrix sample analyzed in the
same analytical batch as the sample
result being reported and calculated
using:
% recovery = [(amt. found in spiked
sample--amt. found in sample)/amt.
spiked] x 100%.
16. Spiking Concentration.... The concentration of method analyte(s)
added to a sample to be analyzed for
calculating analytical precision and
accuracy where the value reported use
the same unit of measure reported for
Analytical Results.
17. Presence/Absence......... Reserved.
------------------------------------------------------------------------
(e) How must I report this information? (1) You must report results
from monitoring under this rule using EPA's
[[Page 409]]
electronic reporting system. For quality control purposes, you must
instruct the organization(s) responsible for the analysis of unregulated
contaminant samples taken under Sec. 141.40 to enter the results into
the reporting system, in the format specified by EPA. You are
responsible for reviewing those results and approving the reporting (via
the electronic system) of the results to EPA. You must also provide a
copy of the results to the State, as directed by the State.
(2) If you report more than one set of valid results for the same
sampling point and the same sampling event (for example, because you
have had more than one organization (e.g., a laboratory) analyze
replicate samples collected under Sec. 141.40, or because you have
collected multiple samples during a single monitoring event at the same
sampling point), EPA will use the highest of the reported values as the
official result.
(f) Does the laboratory to which I send samples report the results
for me? While you must instruct the organization conducting unregulated
contaminant analysis (e.g., a laboratory) to enter the results into
EPA's electronic reporting system, you are responsible for reviewing and
approving the submission of the results to EPA. If the analytical
organization or laboratory cannot enter these data for you using EPA's
electronic reporting system, then you may explain to EPA in writing the
reasons why alternate reporting is necessary and must receive EPA's
approval to use an alternate reporting procedure.
(g) Can I report previously collected data to meet the testing and
reporting requirements for the contaminants listed in Sec. 141.40(a)(3)?
Yes, as long as the data meet the specific requirements of
Sec. 141.40(a)(3), (4), (5), and Appendix A of Sec. 141.40 and you
report the data with the information specified in paragraph (d) of this
section.
[64 FR 50611, Sept. 17, 1999, as amended at 66 FR 2300, Jan. 11, 2001;
66 FR 27215, May 16, 2001; 67 FR 11046, Mar. 12, 2002]