Methods Update Rule II (MUR II) Information
The US EPA issued a final rule on May 18, 2012 to approve new and revised analytical methods for the analysis of
wastewater. This rule, "Guidelines Establishing Test Procedures for the Analysis of Pollutants under the Clean Water
Act; Analysis and Sampling Procedures" applies to 40 CFR Parts 136, 260, 423, 430, and 435.
Federal Register – May 18, 2012 - 40 CFR Parts 136, 260, 423, 430, and 435
The rule is referred to as the "Methods Update Rule II" (MUR II) and includes the following:
- New, revised, and withdrawn wastewater methods.
- New naming format for Standard Methods.
- Minimum quality control requirements.
- Examples of allowed method flexibility.
- Clarifications and corrections to previously approved methods.
- Revisions to sample collection, preservation, and holding time requirements.
The following provide more information on the implementation of this rule.
MUR II Implementation Schedule
|October 15, 2012
||Acknowledgement Form sent to all laboratories. The form requires the updating of SOPs with new method references and required QA/QC.
|December 1, 2012
||Acknowledgement Form must be returned to our office.
|January 1, 2013
||Proficiency Testing samples are analyzed and reported using new Standard Methods naming format and required QA/QC practices.
|January 1, 2013
||Applications submitted to change methods.
||Laboratory evaluations will include the review of the new SOPs and laboratory records with the required QA/QC practices.
Fecal Coliforms (MPN) by Colilert-18® for Clean Water Act (NPDES)
Certification for SIM (Selected Ion Monitoring) analyses
The Office of Environmental Laboratory Certification is now offering certification for Selected
Ion Monitoring (SIM) for EPA Method 8260B (1,4-dioxane), EPA Method 8270D (PAHs) and
Pentachlorophenol. The use of the SIM mode will be acceptable when lower quantitation limits
can not be achieved in the full scan mode. Certificates will reflect this certification using
the SIM designation, e.g. EPA 8270D-SIM. False positives are more of a concern when using SIM
analysis, so at a minimum, one quantitation and two qualifying ions must be monitored for each
analyte (unless less than three ions with intensity greater than 15% of the base peak are
available). Refer to Section 11.5.5 of EPA Method 8270D for additional guidance on performing
SIM analyses. SIM certification is not currently an option under EPA Method 625, therefore it
will not be offered under wastewater (CWA) for NPDES reporting. SIM will only be approved
for solid and hazardous waste (SHW) samples reported to the Agency.
If your laboratory wishes to seek certification for SIM analyses, an application must be
submitted. All information listed on the application checklists must be submitted: http://www.scdhec.gov/environment/behs/labcert/apply.htm.
This would include the application, application fee, applicable SOPs, IDOC studies, MDL studies,
and applicable initial calibration and calibration verification data for the MDL studies. A
proficiency test (PT) will be required for the low level PAHs by EPA 8270D-SIM annually. If
you have further questions, please e-mail us at firstname.lastname@example.org or call at (803) 896-0970.
Additional Organic Analytes Added to Certification
The S.C. DHEC Office of Environmental Laboratory Certification is now offering certification for
several additional volatile and semi-volatile compounds included on EPA's Contract Laboratory Program
(CLP) Target Compound List (TCL). These compounds are to be analyzed by EPA Methods 8260B and
8270D. An application package will be required to add these compounds. The additional compounds are:
The CLP target compound lists (EPA website)