ABSTRACT
Laboratories must use the methods specified in the drinking water regulations at 40 CFR part 141. These methods are listed in Chapters IV, V, VI, and Appendix G.
Certified laboratories should notify the appropriate CA (Regional Administrator or designee or the appropriate NERL) in writing, within 30 days of major changes in personnel, equipment, or laboratory location. A major change in personnel is defined as the loss or replacement of the laboratory supervisor or a situation in which a trained and experienced analyst is no longer available to analyze a particular parameter for which certification has been granted. The CA should discuss the situation with the laboratory supervisor and establish a schedule for the laboratory to address major changes. If the CA determines that the laboratory can no longer produce valid data, the CA should follow the procedure for revocation of certification.
