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<br />-" ~ ~ ~~~-~~~~~~-~~...... ....... .......... ................. .............LI.......o "u.\-...-,- .. "-V~ <br /> <br />case of other contaminants, seasonality of precipitation and <br />contaminant travel time. <br /> <br />~~(b) Permanent Monitoring Relief Authority.-- <br />~~(1) In general.--Each State exercising primary enforcement <br />responsibility for public water systems under this title and <br />having an approved source water assessment program may adopt, in <br />accordance with guidance published by the Administrator, <br />tailored alternative monitoring requirements for public water <br />systems in such State (as an alternative to the monitoring <br />requirements for chemical contaminants set forth in the <br />applicable national primary drinking water regulations) where <br />the State concludes that (based ort data available at the time of <br />adoption concerning susceptibility, use, occurrence, or wellhead <br />protection, or from the State1s drinking water source water <br />assessment program) such alternative monitoring would provide <br />assurance that it complies with the Administrator's guidelines. <br />The State program must be adequate to assure compliance with, <br />and enforcement of, applicable national primary drinking water <br />regulations. Alternative monitoring shall not apply to regulated <br />microbiological contaminants (or indicators thereof), <br />disinfectants and disinfection byproducts, or corrosion <br />byproducts. The preceding sentence is not intended to limit <br />other authority of the Administrator under other provisions of <br />this title to grant monitoring flexibility. <br />"(2) Guidelines.-- <br />"(Al In general.--The Administrator shall issue, <br />after notice and comment and at the same time as <br />guidelines are issued for source water assessment under <br />section 1453, guidelines for States to follow in <br />proposing alternative monitoring requirements under <br />paragraph (1) for chemical contaminants. <<NOTE: Federal <br />Register, publication.>> The Administrator shall publish <br />such guidelines in the Federal Register. The guidelines <br />shall assure that the public health will be protected <br />from drinking water contamination. The guidelines shall <br />require that a State alternative monitoring program <br />apply on a contaminant-by-contaminant basis and that, to <br />be eligible for such alternative monitoring program, a <br />public water system must show the State that the <br />contaminant is not present in the drinking water supply <br />or, if present, it is reliably and consistently below <br />the maximum contaminant level. <br /> <br />[[Page 110 STAT. 1656]] <br /> <br />"(B) Definition.--For purposes of subparagraph (Al, <br />the phrase 'reliably and consistently below the maximum <br />contaminant level' means that, although contaminants <br />have been detected in a water supply, the State has <br />sufficient knowledge of the contamination source and <br />extent of contamination to predict that the maximum <br />contaminant level will not be exceeded. In determining <br />that a contaminant is reliably and consistently below <br />the maximum contaminant level, States shall consider the <br />quality and completeness of data, the length of time <br />covered and the volatility or stability of monitoring <br />results during that time, and the proximity of such <br />results to the maximum contaminant level. Wide <br />variations in the analytical results, or analytical <br /> <br />http://www.epa.gov/safewater/sdwa/text.html <br /> <br />rabv"'t/UIO,J <br /> <br />12/20/2001 <br />