Section 611.977  Requirements for Remaining on Reduced TTHM and HAA5 Monitoring Based on Subpart I Results

A supplier may remain on reduced monitoring after the applicable dates identified in Section 611.970(c) for compliance with this Subpart Y only if the supplier fulfills each of the requirements set forth in subsections (a) through (c), subject to the limitations of subsection (d):

a)         The supplier qualifies for a 40/30 certification pursuant to Section 611.923 or it has received a very small system waiver pursuant to Section 611.924;

b)         The supplier meets the reduced monitoring criteria set forth in Section 611.973(a);

c)         The supplier does not change or add monitoring locations from those used for compliance monitoring under Subpart I; and

d)         If the supplier's monitoring locations pursuant to this Subpart Y differ from its monitoring locations pursuant to Subpart I, the supplier may not remain on reduced monitoring after the dates identified in Section 611.970(c) for the purposes of compliance with this Subpart Y.

BOARD NOTE:  Derived from 40 CFR 141.627 (2016).

(Source:  Amended at 42 Ill. Reg. 1140, effective January 4, 2018)