Frequent Questions

For Schedule 1 systems that use existing Stage 1 sites for Stage 2 compliance, does the LRAA MCL compliance begin-date start in 2nd Quarter 2012, or after 4 quarters of monitoring, same as for the new Stage 2 sampling locations?

The LRAA compliance calculation is made after four consecutive quarters for each Stage 2 compliance monitoring site (including sites that once served as Stage 1 monitoring sites). Except if any of the results exceed four times the MCL before the fourth quarter.
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