Section 149.22. Required analyses of proficiency testing samples.

 

(1)   Requirements.

(a) Laboratories shall participate in at least one single-concentration proficiency testing study per certification or registration period for each analyte or analyte group identified by the department as specified in sub. (2) .

1. For aqueous and solid matrices, laboratories shall analyze aqueous matrix proficiency testing samples for each combination of technique and analyte or analyte group in a laboratory's fields of certification or registration.

2. For the drinking water matrix, laboratories shall analyze proficiency testing samples for each combination of method and analyte or analyte group in a laboratory's fields of certification.

(b) Single-concentration proficiency testing studies may be those offered at set intervals by proficiency testing sample providers, "rapid response" samples or custom formulations approved by the department.

(2)   Lists of required proficiency testing samples and approved providers.

(a) The department shall publish a list of required proficiency testing samples and approved proficiency testing sample providers annually. The department shall seek the advice of the certification standards review council prior to identifying required proficiency testing samples and approved sample providers.

(b) The list shall identify matrix-specific proficiency testing samples required for submittal for renewal of accreditation, or with initial or revised applications and the specific providers approved for supplying each required sample.

(3)   Exemptions .

(a) Laboratories performing the following analytical techniques for metals analysis in aqueous and solid matrices shall analyze quality control standards 3 times per year at evenly spaced intervals in lieu of analyzing proficiency testing samples:

1. Flame atomic absorption spectrophotometry.

2. Colorimetric, for analytes other than hexavalent chromium.

(b) Laboratories analyzing ultra-low level metals in aqueous and solid matrices shall analyze quality control standards 3 times per year at evenly spaced intervals in lieu of analyzing proficiency testing samples. Quality control standards shall be diluted to fall within the working concentration of the analytical technique.

History: CR 06-005 : cr. Register April 2008 No. 628 , eff. 9-1-08.

Note

Lists of required testing samples and approved proficiency testing sample providers are available on the department's website at http://www.dnr.state.wi.us/org/es/science/lc/PT/Index.htm . Microsoft Windows NT 6.1.7601 Service Pack 1