IN THE MATTER OF: PROPOSED MTBE AND COMPLIANCE DETERMINATION AMENDMENTS TO GROUNDWATER QUALITY STANDARDS: 35 ILL. ADM. CODE 620
The Board adopted a second notice opinion and order in this rulemaking to amend the Board’s public water supply regulations by adding a groundwater quality standard for methyl tertiary-butyl ether (MTBE).
December 6, 2001IN THE MATTER OF:PROPOSED MTBE AND COMPLIANCEDETERMINATION AMENDMENTS TOGROUNDWATER QUALITY STANDARDS:35 ILL.
The second hearing was held on April 5, 2001, in Chicago where Mr.
In the third public comment, the Agency
said that it supported the Board’s decision to amend the definition of carcinogen at Part 620 ofthe Board’s regulations to match the definition at Section 58.2 of the Act.
of Reas.
at 2-3.
Some people can taste or smell MTBE in drinking water at concentrations
as low as 20 to 40 parts per billion (ppb).2 Tr.1 at 12, 51-52; Exh. For the sake of consistency and readability, the Board has converted all MTBEmea...
Allowed
wilsonb
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