[Title 40 CFR 141.25]
[Code of Federal Regulations (annual edition) - July 1, 2009 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)]
[Subchapter D - WATER PROGRAMS (CONTINUED)]
[Part 141 - NATIONAL PRIMARY DRINKING WATER REGULATIONS--]
[Subpart C - Monitoring and Analytical Requirements]
[Sec. 141.25 - Analytical methods for radioactivity.]
[From the U.S. Government Printing Office]
40PROTECTION OF ENVIRONMENT222009-07-012009-07-01falseAnalytical methods for radioactivity.141.25Sec. 141.25PROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTION AGENCY (CONTINUED)WATER PROGRAMS (CONTINUED)NATIONAL PRIMARY DRINKING WATER REGULATIONS--Monitoring and Analytical Requirements
Sec. 141.25 Analytical methods for radioactivity.
(a) Analysis for the following contaminants shall be conducted to
determine compliance with Sec. 141.66 (radioactivity) in accordance
with the methods in the following table, or their equivalent determined
by EPA in accordance with Sec. 141.27.
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Reference (Method of Page Number)
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Contaminant Methodology EPA
EPA \1\ \2\ EPA \3\ EPA \4\ SM \5\ ASTM \6\ USGS \7\ DOE \8\ Other
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Naturally Occurring:
Gross alpha \11\ and beta Evaporation.... 900.0 p. 1.. 00-01... p. 1...... 302, 7110 B, .......... R-1120-76....
7110 B-00.
Gross alpha \11\......... Coprecipitation ......... ...... 00-02... .......... 7110 C, 7110 C-
00.
Radium 226............... Radon emanation 903.1 p. 16. Ra-04... p. 19..... 305, 7500-Ra D3454-97.. R-1141-76.... Ra-04..... NY \9\,
C, 7500-Ra C-
01.
Radiochemical.. 903.0 p. 13. Ra-03... .......... 304, 7500-Ra D2460-97.. R-1140-76.... .......... GA \14\
B, 7500-Ra B-
01.
Radium 228............... Radiochemical.. 904.0 p. 24. Ra-05... p. 19..... 7500-Ra D, .......... R-1142-76.... .......... NY \9\,
7500-Ra D-01. NJ \10\,
GA \14\
Uranium \12\............. Radiochemical.. 908.0 ...... ........ .......... 7500-U B, 7500-
U B-00.
Fluorometric... 908.1 ...... ........ .......... 7500-U C (17th D2907-97.. R-1180-76, R- U-04......
Ed.). 1181-76.
ICP-MS......... 200.8 ...... ........ .......... 3125.......... D5673-03..
\13\
Alpha ......... ...... 00-07... p. 33..... 7500-U C D3972-97, R-1182-76.... U-02......
Spectrometry. (18th, 19th, 02.
or 20th Ed.),
7500-U C-00.
Laser ......... ...... ........ .......... .............. D5174-97,
Phosphorimetry. 02.
Man-Made:
Radioactive Cesium....... Radiochemical.. 901.0 p. 4.. ........ .......... 7500-Cs B, D2459-72.. R-1111-76....
7500-Cs B-00.
Gamma Ray 901.1 ...... ........ p. 92..... 7120, 7120-97. D3649-91, R-1110-76.... 4.5.2.3...
Spectrometry. 98a.
Radioactive Iodine....... Radiochemical.. 902.0 p. 6.. ........ .......... 7500-I B, 7500-
I B-00.
p. 9.. ........ .......... 7500-I C, 7500-
I C-00.
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7500-I D, 7500- D3649-91,
I D-00. 98a.
Gamma Ray 901.1 ...... ........ p. 92..... 7120, 7120-97. D4785-93, ............. 4.5.2.3...
Spectrometry. 00a.
Radioactive Strontium 89, Radiochemical.. 905.0 p. 29. Sr-04... p. 65..... 303, 7500-Sr .......... R-1160-76.... Sr-01, Sr-
90. B, 7500-Sr B- 02.
01.
Tritium.................. Liquid 906.0 p. 34. H-02.... p. 87..... 306, 7500-\3\ D4107-91, R-1171-76....
Scintillation. H B, 7500-\3\ 98
H B-00. (Reapprov
ed 2002).
Gamma Emitters........... Gamma Ray 901.1 ...... ........ p. 92..... 7120, 7120-97. D3649-91, R-1110-76.... Ga-01-R...
Spectrometry. 98a.
902.0 ...... ........ .......... 7500-Cs B, D4785-93,
7500-Cs B-00. 00a.
901.0 ...... ........ .......... 7500-I B, 7500-
I B-00.
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The procedures shall be done in accordance with the documents listed below. The incorporation by reference of documents 1 through 10 and 13 through 14
was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies of the documents may be obtained
from the sources listed below. Information regarding obtaining these documents can be obtained from the Safe Drinking Water Hotline at 800-426-4791.
Documents may be inspected at EPA's Drinking Water Docket, EPA West, 1301 Constitution Avenue, NW., Room 3334 , Washington, DC 20460 (Telephone: 202-
566-2426); or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-
6030, or go to: http://www.archives.gov/federal--register /code--of--federal--regulations/ibr--locations.html.
\1\ ``Prescribed Procedures for the Measurement of Radioactivity in Drinking Water,'' EPA 600/4-80-032, August 1980. Available at the U.S. Department of
Commerce, National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161 (Telephone 800-553-6847), PB 80-224744.
\2\ ``Interim Radiochemical Methodology for Drinking Water,'' EPA 600/4-75-008 (revised), March 1976. Available NTIS, ibid.
\3\ ``Radiochemistry Procedures Manual,'' EPA 520/5-84-006, December 1987. Available NTIS, ibid.
\4\ ``Radiochemical Analytical Procedures for Analysis of Environmental Samples,'' March 1979. Available at NTIS, ibid. EMSL LV 053917.
\5\ ``Standard Methods for the Examination of Water and Wastewater,'' 13th, 17th, 18th, 19th or 20th edition, 1971, 1989, 1992, 1995, 1998. Available at
American Public Health Association, 1015 Fifteenth Street, NW., Washington, DC 20005. Methods 302, 303, 304, 305 and 306 are only in the 13th edition.
Methods 7110B, 7500-Ra B, 7500-Ra C, 7500-Ra D, 7500-U B, 7500-Cs B, 7500-I B, 7500-I C, 7500-I D, 7500-Sr B, and 7500-\3\H B are in the 17th, 18th,
19th and 20th editions. Method 7110 C is in the 18th, 19th and 20th editions. Method 7500-U C Fluorometric Uranium is only in the 17th Edition, and
7500-U C Alpha spectrometry is only in the 18th, 19th and 20th editions. Method 7120 is only in the 19th and 20th editions. Method 3125 is only in the
20th edition. Methods 7110 B-00, 7110 C-00, 7500-Ra B-01, 7500-Ra C-01, 7500-Ra D-01, 7500-U B-00, 7500-U C-00, 7500-I B-00, 7500-I C-00, 7500-I D-00,
7120-97, 7500-Sr B-01, and 7500-\3\H B-00 are available online at http://www.standardmethods.org. The year in which each method was approved by the
Standard Methods Committee is designated by the last two digits in the method number. The methods listed are the only online versions that may be
used.
\6\ Annual Book of ASTM Standards, Vol. 11.01 and 11.02, 2002; ASTM International; any year containing the cited version of the method may be used.
Copies of these two volumes and the 2003 version of D 5673-03 may be obtained from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West
Conshohocken, PA 19428-2959.
\7\ ``Methods for Determination of Radioactive Substances in Water and Fluvial Sediments,'' Chapter A5 in Book 5 of Techniques of Water-Resources
Investigations of the United States Geological Survey, 1977. Available at U.S. Geological Survey (USGS) Information Services, Box 25286, Federal
Center, Denver, CO 80225-0425.
\8\ ``EML Procedures Manual,'' 28th (1997) or 27th (1990) Editions, Volumes 1 and 2; either edition may be used. In the 27th Edition Method Ra-04 is
listed as Ra-05 and Method Ga-01-R is listed as Sect. 4.5.2.3. Available at the Environmental Measurements Laboratory, U.S. Department of Energy
(DOE), 376 Hudson Street, New York, NY 10014-3621.
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\9\ ``Determination of Ra-226 and Ra-228 (Ra-02),'' January 1980, Revised June 1982. Available at Radiological Sciences Institute for Laboratories and
Research, New York State Department of Health, Empire State Plaza, Albany, NY 12201.
\10\ ``Determination of Radium 228 in Drinking Water,'' August 1980. Available at State of New Jersey, Department of Environmental Protection, Division
of Environmental Quality, Bureau of Radiation and Inorganic Analytical Services, 9 Ewing Street, Trenton, NJ 08625.
\11\ Natural uranium and thorium-230 are approved as gross alpha calibration standards for gross alpha with co-precipitation and evaporation methods;
americium-241 is approved with co-precipitation methods.
\12\ If uranium (U) is determined by mass, a 0.67 pCi/[mu]g of uranium conversion factor must be used. This conversion factor is based on the 1:1
activity ratio of U-234 and U-238 that is characteristic of naturally occurring uranium.
\13\ ``Determination of Trace Elements in Waters and Wastes by Inductively Coupled Plasma-Mass Spectrometry,'' Revision 5.4, which is published in
``Methods for the Determination of Metals in Environmental Samples--Supplement I,'' ' EPA 600-R-94-111, May 1994. Available at NTIS, PB 95-125472.
\14\ ``The Determination of Radium-226 and Radium-228 in Drinking Water by Gamma-ray Spectrometry Using HPGE or Ge(Li) Detectors,'' Revision 1.2,
December 2004. Available from the Environmental Resources Center, Georgia Institute of Technology, 620 Cherry Street, Atlanta, GA 30332-0335, USA,
Telephone: 404-894-3776. This method may be used to analyze for radium-226 and radium-228 in samples collected after January 1, 2005 to satisfy the
radium-226 and radium-228 monitoring requirements specified at 40 CFR 141.26.
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(b) When the identification and measurement of radionuclides other
than those listed in paragraph (a) of this section is required, the
following references are to be used, except in cases where alternative
methods have been approved in accordance with Sec. 141.27.
(1) Procedures for Radiochemical Analysis of Nuclear Reactor Aqueous
Solutions, H. L. Krieger and S. Gold, EPA-R4-73-014. USEPA, Cincinnati,
Ohio, May 1973.
(2) HASL Procedure Manual, Edited by John H. Harley. HASL 300, ERDA
Health and Safety Laboratory, New York, NY., 1973.
(c) For the purpose of monitoring radioactivity concentrations in
drinking water, the required sensitivity of the radioanalysis is defined
in terms of a detection limit. The detection limit shall be that
concentration which can be counted with a precision of plus or minus 100
percent at the 95 percent confidence level (1.96[sigma] where [sigma] is
the standard deviation of the net counting rate of the sample).
(1) To determine compliance with Sec. 141.66(b), (c), and (e) the
detection limit shall not exceed the concentrations in Table B to this
paragraph.
Table B--Detection Limits for Gross Alpha Particle Activity, Radium 226,
Radium 228, and Uranium
------------------------------------------------------------------------
Contaminant Detection limit
------------------------------------------------------------------------
Gross alpha particle activity.............. 3 pCi/L.
Radium 226................................. 1 pCi/L.
Radium 228................................. 1 pCi/L.
Uranium.................................... 1 [micro]g/L
------------------------------------------------------------------------
(2) To determine compliance with Sec. 141.66(d) the detection
limits shall not exceed the concentrations listed in Table C to this
paragraph.
Table C--Detection Limits for Man-made Beta Particle and Photon Emitters
------------------------------------------------------------------------
Radionuclide Detection limit
------------------------------------------------------------------------
Tritium................................... 1,000 pCi/1.
Strontium-89.............................. 10 pCi/1.
Strontium-90.............................. 2 pCi/1.
Iodine-131................................ 1 pCi/1.
Cesium-134................................ 10 pCi/1.
Gross beta................................ 4 pCi/1.
Other radionuclides....................... \1/10\ of the applicable
limit.
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(d) To judge compliance with the maximum contaminant levels listed
in Sec. 141.66, averages of data shall be used and shall be rounded to
the same number of significant figures as the maximum contaminant level
for the substance in question.
(e) The State has the authority to determine compliance or initiate
enforcement action based upon analytical results or other information
compiled by their sanctioned representatives and agencies.
[41 FR 28404, July 9, 1976, as amended at 45 FR 57345, Aug. 27, 1980; 62
FR 10173, Mar. 5, 1997; 65 FR 76745, Dec. 7, 2000; 67 FR 65250, Oct. 23,
2002; 69 FR 38855, June 29, 2004; 69 FR 52180, Aug. 25, 2004; 72 FR
11245, Mar. 12, 2007]
Effective Date Note: At 74 FR 30958, June 29, 2009, Sec. 141.25 was
amended by revising the introductory text preceding the table in
paragraph (a), effective July 29, 2009. For the convenience of the user,
the revised text is set forth as follows: