Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 352 - PROCEDURES FOR DETERMINING WATER QUALITY BASED PERMIT LIMITATIONS FOR NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM DISCHARGERS TO THE LAKE MICHIGAN BASIN › Subpart A - INTRODUCTION › Section 352.104 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
Terms used in this Part have the meanings specified in 35
				  Ill. Adm. Code
				  301.200
				  through 301.444 and
				  302.501.
				  The following terms have the meanings specified:
"Agency" means the Illinois Environmental Protection
				  Agency.
"Area of Concern" or "AOC" is an area specially designated
				  for remediation efforts.
"Bioaccumulative Chemicals of Concern" or "BCC" means a
				  chemical or class of chemicals meeting the definition at 35 Ill. Adm. Code
				  302.501.
"Lake Michigan Lakewide Management Plan" or "LaMP" is a plan
				  to manage the Illinois portion of Lake Michigan as approved by USEPA.
"Method Detection Level" is the minimum concentration of an
				  analyte (substance) that can be measured and reported with a 99 percent
				  confidence that the analyte concentration is greater than zero as determined by
				  the procedure set forth in Appendix B of 40 CFR 136.
"Minimum Level" or "ML" is the concentration at which the
				  entire analytical system must give a recognizable signal and acceptable
				  calibration point. The ML is the concentration in a sample that is equivalent
				  to the concentration of the lowest calibration standard analyzed by a specific
				  analytical procedure approved in 40 CFR 136, assuming that all the
				  method-specified sample weights, volumes and processing steps have been
				  followed.
"Outlier" is a test value that is not statistically valid
				  under tests approved in 40 CFR 136.
"Quantification Level" is a measurement of the concentration
				  of a contaminant obtained by using a specified laboratory procedure approved in
				  40 CFR 136 and calibrated at a specified concentration above the method
				  detection level. It is considered the lowest concentration at which a
				  particular contaminant can be quantitatively measured using a specified
				  laboratory procedure for monitoring of the contaminant.
"Pollutant Minimization Program" means a plan to achieve or
				  maintain the goal of reducing contaminant discharges to below water quality
				  based effluent limits.
"Preliminary Effluent Limitation" or "PEL" is an estimate of
				  an allowable discharge taking into consideration mixing or dilution.
"Projected Effluent Quality" or "PEQ" is the amount of a
				  contaminant estimated to be discharged by a facility or activity taking into
				  account statistical analysis of the discharge or activity.
"Reasonable Potential Analysis" or "Reasonable Potential to
				  Exceed" means the procedure to predict whether an existing or future discharge
				  would cause or contribute to a violation of water quality standards, criteria
				  or values.
"Same Body of Water" means that, for purposes of evaluating
				  intake toxic substances consistent with Section
				  352.425, the
				  Agency will consider intake toxic substances to be from the same body of water
				  if the Agency finds that the intake toxic substance would have reached the
				  vicinity of the outfall point in the receiving water within a reasonable period
				  had it not been removed by the permittee and there is a direct hydrological
				  connection between the intake and the discharge points. Notwithstanding the
				  provisions of this definition, an intake toxic substance shall be considered to
				  be from the same body of water if the permittee's intake point is located on
				  Lake Michigan and the outfall point is located on a tributary of Lake Michigan.
				  In this situation, the background concentration of the toxic substance in the
				  receiving water shall be similar to or greater than that in the intake water
				  and the difference, if any, between the water quality characteristics of the
				  intake and receiving water shall not result in an adverse impact on the
				  receiving water.
"Total Maximum Daily Load" or "TMDL" is the sum of the
				  individual wasteload allocations for point sources and load allocations for
				  nonpoint sources and natural background, as more fully defined at
				  40
				  CFR 130.2(i). A TMDL sets
				  and allocates the maximum amount of a pollutant that may be introduced into a
				  water body and still assure attainment and maintenance of water quality
				  standards.
"USEPA" means the United States Environmental Protection
				  Agency.
"Waste Load Allocation" or "WLA" is the portion of a
				  receiving water's loading capacity that is allocated to one of its existing or
				  future point sources of pollution, as more fully defined at
				  40
				  CFR 130.2(h). In the absence
				  of a TMDL approved by EPA pursuant to
				  40
				  CFR 130.7 or an assessment and remediation
				  plan developed and approved in accordance with procedure 3.A of Appendix F of
				  40 CFR 132, a WLA is the allocation for an individual point source that ensures
				  that the level of water quality to be achieved by the point source is derived
				  from and complies with all applicable water quality standards.
"Water Quality Based Effluent Limitation" or "WQBEL" is a
				  limit imposed in a permit so that the applicable water quality standard,
				  criteria or value is not exceeded outside of a designated mixing zone.
"Wet Weather Point Source" means any discernible, confined
				  and discrete conveyance from which pollutants are, or may be, discharged as the
				  result of a wet weather event. Discharges from wet weather point sources shall
				  include only: discharges of storm water from a municipal separate storm sewer
				  as defined at
				  40
				  CFR 122.26(b)(8); storm
				  water discharge associated with industrial activity as defined at
				  40
				  CFR 122.26(b)(14);
				  discharges of storm water and sanitary wastewaters (domestic, commercial, and
				  industrial) from a combined sewer overflow; or any other stormwater discharge
				  for which a permit is required under section 402(p) of the Clean Water Act. A
				  storm water discharge associated with industrial activity which is mixed with
				  process wastewater shall not be considered a wet weather point source.
"Whole Effluent Toxicity" or "WET" means a test procedure
				  that determines the effect of an effluent on aquatic life.