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National Primary Drinking Water Regulations: Stage 2 Disinfectants and Disinfection Byproducts Rule
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
[Federal Register: June 29, 2006 (Volume 71, Number 125)]
[CORRECTIONS]
[Page 37168]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr29jn06-116]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 141
[EPA-HQ-OW-2002-0043; FRL-8012-1]
RIN 2040-AD38
National Primary Drinking Water Regulations: Stage 2
Disinfectants and Disinfection Byproducts Rule
Correction
In rule document 06-3 beginning on page 388 in the issue of
Wednesday, January 4, 2006, make the following corrections:
Sec. 141.131 [Corrected]
On page 481, in Sec. 141.31(c)(1) the table is corrected to read
as set forth below:
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Residual measured 1
Methodology SM (19th or 20th SM Online 2 ASTM method EPA method -----------------------------------------------------------------------
ed) Free Cl2 Combined Cl2 Total Cl2 ClO2
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Amperometric Titration.......... 4500-Cl D 4500-Cl D-00 D 1253-86 (96), 03 ................... X X X ................
Low Level Amperometric Titration 4500-Cl E 4500-Cl E-00 ....................... ................... ................ ................ X
DPD Ferrous Titrimetric......... 4500-Cl F 4500-Cl F-00 ....................... ................... X X X ................
DPD Colorimetric................ 4500-Cl G 4500-Cl G-00 ....................... ................... X X X ................
Syringaldazine (FACTS).......... 4500-Cl H 4500-Cl H-00 ....................... ................... X ................ ................ ................
Iodometric Electrode............ 4500-Cl I 4500-Cl I-00 ....................... ................... ................ ................ X ................
DPD............................. 4500-ClO2 D ................... ....................... ................... ................ ................ ................ X
Amperometric Method II.......... 4500-ClO2 E 4500-ClO2 E-00 ....................... ................... ................ ................ ................ X
Lissamine Green ................... ................... ....................... 327.0 Rev 1.1 ................ ................ ................ X
Spectrophotometric.
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1 X indicates method is approved for measuring specified disinfectant residual. Free chlorine or total chlorine may be measured for demonstrating compliance with the chlorine MRDL and combined
chlorine, or total chlorine may be measured for demonstrating compliance with the chloramine MRDL.
2 The Standard Methods Online version that is approved is indicated by the last two digits in the method number which is the year of approval by the Standard Method Committee. Standard Methods
Online are available at http://www.standardmethods.org. 
[FR Doc. C6-3 Filed 6-28-06; 8:45 am]
BILLING CODE 1505-01-D