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(2) The following pollutant limits are established to protect against Pass <br />Through and Interference. Th°. se limita4iens ffla5, be applied as eithe <br />instanAameeus limitations of daily ffiwdnium limitations. No persen <br />Significant Industrial User shall discharge wastewater eenteining in excess <br />of the following daily maximum discharge limitations: [0.00019) mg/L <br />total mercury. <br />(3) The Director may, at the Director's sole discretion, implement local <br />limits through allocation of the Maximum Allowable Industrial Load <br />(MAIL) to Significant Industrial Users. The MAIL is the total daily <br />loading of a pollutant available to be allocated to all Significant Industrial <br />Users. MAILs for the following_ pollutants are hereby incorporated by <br />reference: <br />F0.31 -a- Arsenic <br />X0.51 arc Cadmium <br />X7.53 rn /4-c Chromium <br />X1.6] Higl -e Copper <br />x-1-6] rrtg''1 -c Cyanide <br />X1.61 mg -1 Lead <br />[ 0.1] mg /1 r- 1.9 }rrtg'1 n Nickel <br />[ 1.8] mgrs Silver <br />[ 3-0j ---nom 4-z Zinc <br />(4) Significant Industrial Users (SIU) who have not been given an <br />allocation for one of the pollutants listed above shall notify the City of <br />South Bend at least 90 days in advance of a change in the characteristics of <br />their wastewater that would increase the expected concentration of that <br />pollutant in their wastewater discharge. In addition, the City may <br />determine at any time that an SIU wastewater discharge requires a <br />limitation for a pollutant, regardless of the concentration levels listed <br />below, and may then develop a limit based on the MAIL. In any case, SIU <br />discharge that is found to contain in excess of the following concentrations <br />will be reviewed for the need for a limit. The Director may require more <br />sensitive analysis when results are reported as less than the following <br />concentrations or less than greater concentrations: <br />Arsenic --0.2 mg /L <br />Cadmium --0.1 mg/L <br />Chromium -2.0 mg/L <br />Copper -0.3 mg/L <br />Lead -0.3 mg/L <br />