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Environmental Laboratory Certification

Program Updates

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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:

  1. New, revised, and withdrawn wastewater methods.
  2. New naming format for Standard Methods.
  3. Minimum quality control requirements.
  4. Examples of allowed method flexibility.
  5. Clarifications and corrections to previously approved methods.
  6. 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.
January 2013 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)

Any NPDES facility wishing to use this method for compliance analyses must submit a letter to EPA Region 4 requesting approval to use this method for wastewater samples.

The EPA Region 4 issued a memorandum concerning this ATP.

IDEXX Colilert-18® Protocol for Fecal Coliform

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: 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 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:

EPA 8260B:
Methyl acetate

EPA 8270D:

The CLP target compound lists (EPA website)

For additional information, please email us.