§ 32-221. Local limits.
(a)
The following local limits have been developed pursuant to 40 CFR 403.5(c) to prevent against interference and pass through.
(b)
The local limits shall be distributed at the discretion of the director as part of each significant industrial user's industrial wastewater discharge permit. The sum total of each permitted local limit shall not exceed the mass in the table below.
(c)
All values for metallic pollutants are for total metal unless otherwise indicated.
(d)
The director may allow a SIU to develop and implement best management practices (BMPs), to control the amount of a pollutant discharged to the POTW pursuant to the requirements of section 32-160 and section 32-161.
(e)
Local limits are subject to change as local environmental conditions change. All changes to local limits shall be approved by the U.S. Environmental Protection Agency (EPA) and the Kansas Department of Health and Environment (KDHE).
(f)
For purposes of the table below, "MAIL" means maximum allowable industrial loading, and "MAHL" means maximum allowable headworks loading. "Present loading % of MAHL" refers to the degree to which the city's wastewater treatment plant was loaded for each pollutant pursuant to an April 18, 2018, analysis.
City of Manhattan Local Limits
Monthly Averages
Pollutant MAIL lbs/d MAHL lbs/d Present Loading % of MAHL BOD 5,495 17,300 50% TSS 2,547 16,000 41% NH3 204 2,400 73% Phosphorus 113 430 61% Arsenic, Total 0.913 1.033 11% Cadmium, Total 0.764 0.786 3% Cyanide, Total 1.039 1.837 44% Chromium, Total 22.433 22.666 1% Copper, Total 12.945 14.740 12% Mercury, Total 0.149 0.157 5% Molybdenum, Total 1.562 1.602 13% Nickel, Total 5.923 6.195 4% Selenium, Total 1.199 1.239 7% Silver, Total 5.433 5.493 1% Lead, Total 8.246 8.531 3% Zinc, Total 50.487 55.316 9% City of Manhattan Local Limits
Daily Maximums
Pollutant MAIL lbs/d MAHL lbs/d Present Loading % of MAHL BOD 8,645 20,800 42% TSS 5,517 19,300 34% NH3 1,194 3,500 50% Phosphorus 320 660 40%
(Ord. No. 7391, § 3, 12-18-18)