Metodos Epa Obsoletos

EPA Finalizes Methods Update Rule
By Jerry Parr, Catalyst Information Resources
The EPA has finalized extensive changes to the analysis and sampling procedures in the wastewater and
drinking water regulations. These changes, included in a regulation known as the Methods Update Rule
(MUR), approve new methods and update versions of currently approved methods, revise method
modification andanalytical requirements, withdraw certain outdated methods and modify the sample
collection, preservation, and holding time requirements. The rule was originally proposed in 2004, and its
effective date is 30 days from the date of publication in the Federal Register, which is expected to be
sometime in February.
Highlights from the final rule are summarized below:
New Chemical Test MethodsThis rule approved 22 new procedures for monitoring chemical pollutants:
• ASTM D6508, Dissolved Inorganic Anions by Capillary Ion Electrophoresis.
• QuikChem Method 10-204-00-1-X, Cyanide using MICRO DIST and flow injection analysis.
• Kelada-01, Automated Methods for Total Cyanide, Acid Dissociable Cyanide, and Thiocyanate.
• Method CP-86.07, Chlorinated Phenolics by In situ Acetylation andGC/MS.
• EPA Method 245.7, Mercury by Cold Vapor Atomic Fluorescence Spectrometry.
• Standard Methods 4500-Cl, Chlorine by Low Level Amperometry.
• ASTM D6888-04 Available Cyanide by Ligand Exchange-FIA.
• ASTM D 6919-03, Cations and Ammonium in by Ion Chromatography.
• Standard Method 4500-Cl-D. Chloride by Potentiometry.
• ASTM D512-89 Chloride by Ion Selective Electrode.
• Standard Method4500-CN-F, Cyanide by Ion Selective Electrode.
• ASTM D2036-98 A, Cyanide by Ion Selective Electrode.
• Standard Method 4500-S2-G, Sulfide by Ion Selective Electrode.
• ASTM D4658-92, Sulfide by Ion Selective Electrode.
• Standard Method 4500-NO3-D, Nitrate by Ion Selective Electrode.
• Method D99-003, Free Chlorine by Color Comparison Test Strip.
• Method OIA-1677, DW Available Cyanide byLigand Exchange_FIA.
• Radium-226 and 228 by Gamma Spectrometry.
• EPA Method 327.0, Chlorine Dioxide by Colorimetry.
• EPA Method 300.1 for Anions.
• EPA Method 552.3 for Dalapon.
• Determination of Radium-226 and Radium-228 in Drinking Water by Gamma-ray Spectrometry
Using HPGE or Ge(Li) Detectors.
Note that some of these methods were approved for wastewater only, some for drinking wateronly, and
some for both wastewater and drinking water.
Updated Chemical Test Methods
The rule also approves methods that were first proposed in 1995, including:
• Method 200.2,Total Recoverable Elements Digestion.
• Method 200.8, Metals by Inductively Coupled Plasma-Mass Spectrometry.
• Method 200.9, Metals by Stabilized Temperature Graphite Furnace Atomic Absorption.
• Method 218.6,Hexavalent Chromium by Ion Chromatography.
• Method 300.0, Inorganic Anions by Ion Chromatography.
• Method 353.2, Nitrate and Nitrite by Colorimetry.
• Revisions to Methods 180.1, 200.7, 245.1, 335.3, 350.1, 351.2, 353.2, 365.1, 375.2, 410.4, and
420.4.
The ASTM and Standard Methods versions of many of these methods were also approved.
Updated Versions of Currently Approved Methods
This ruleapproved about 200 updated methods, including:
• An errata sheet for the whole effluent toxicity manuals.
• 74 newer versions of ASTM methods.
• 88 newer versions of Standard Methods from the 18th, 19th and 20th editions, but not the 21st.
• 19 methods published in the 16th edition of Official Methods of Analysis of AOAC International,
1995.
Method Modifications, Analytical Requirements, andReporting Requirements
The final rule includes a new section to introduce greater flexibility in the use of approved methods. The
section describes the circumstances in which approved methods may be modified and the requirements
that analysts must meet to use these modified methods in required measurements without prior EPA
approval. The rule also includes language to clarify that analysts need...