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R 90-020 11/27/91 Opinion and Order
IN THE MATTER OF: DIESEL VEHICLE EXHAUST OPACITY LIMITS
Handle: Document-22088
Owner: Site Administrator (User-2, admin:DocuShare)DS
Tuesday, May 14, 2002 12:57:44 PM CDT
Thursday, September 2, 2004 11:32:31 AM CDT
Modified By: Site Administrator (User-2, admin:DocuShare)DS
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  • ILLINOIS POLLUTION CONTROL BOARD
November 27, 1991IN THE MATTER OF: ) R90—20DIESEL VEHICLE EXHAUST ) (Rulemaking)OPACITY LIMITS ) PROPOSED RULE.
  • These revisions are primarily deletions from
provisions proposed at First Notice rather than additions ofregulatory language.
  • Further, over 100 letters were received from
individual citizens.
  • Opacity is defined as that fraction of light transmission
that is obscured by emissions from a stack and prevented fromreaching the observer or instrument receiver.
  • In the partial-flow/sampling type opacimeter,
a portion of the exhaust gas is continuously withdrawn a...
Allowed
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Appears In: R 90-020
Preferred Version: R 90-020 11/27/91 Opinion and Order