Rather, EPA will use the technique from prior to the enactment of AWIA, and incorporate 800 nationally-consultant h2o devices serving much less than or equal to 10,000 in the UCMR application. Consistent with prior UCMRs, this proposed action maintains the need that PWS use laboratories authorised by EPA to assess UCMR 5 samples. L. How do laboratories become permitted to carry out the UCMR five analyses?