With the exception of perchlorate analyses , laboratories certified under 40 CFR 141.28 for compliance monitoring using methods which are also listed as approved UCMR analytical methods, are by default approved to perform UCMR analyses using those analytical methods for UCMR monitoring of specific contaminants. If, however, the system wants to collect concurrent compliance data with their UCMR monitoring to reduce the cost burden, they would then need to use a lab certified within their state of residence. As with compliance monitoring, it is the responsibility of the PWS to ensure that they are using an appropriate laboratory. They may do so by asking the laboratory to demonstrate that it meets the approval requirements for the UCMR by providing evidence of the certification described above.
Most states can provide a listing of certified labs.
For all the other assessment monitoring contaminants, laboratories are certified under 40 CFR 141.28 for compliance analysis using one or more of the associated analytical methods in Table 3 of 40 CFR 141.40 . At the time of these studies, these laboratories were certified by a State or primacy agency to conduct compliance monitoring for at least one inorganic parameter using an approved ion chromatographic method. This listing merely denotes certified laboratories which provided acceptable performance data in the Spring or Fall 2000 Perchlorate PT study and met the requirements for approval to conduct perchlorate analysis in support of UCMR List 1 Assessment Monitoring. This approval is contingent upon these laboratories maintaining State or primacy agency certification to conduct compliance monitoring for any inorganic parameter using an approved ion chromatographic method. Arkansas Dept. of Health, Div.