(A) The standards for the allowable discharge of industrial wastewaters to the POTW are listed here. The amount and nature of allowable discharges will be specified on the permit and the characteristics of any discharge shall not exceed those specified in this chapter. Users currently discharging wastewater in excess of these standards shall limit the discharge to conform to the standards within 90 days of the effective date of this chapter. The control authority may impose mass limitations where they are appropriate or to promote water conservation as allowed by 40 C.F.R. 403.6(c)(6) in addition to the concentration-based limitations set forth below.
(B) Unless the control authority has imposed mass limitations, no person shall discharge industrial wastewater containing in excess of the following local limits.
Local Limits 2010 | |
Pollutant | Limit (mg/L) |
Local Limits 2010 | |
Pollutant | Limit (mg/L) |
Ammonia | 35 |
Arsenic | 0.06 |
Benzene | 0.03 |
Bis (2-ethylhexyl) phthalate | No limit |
Biochemical Oxygen Demand (5-day) | 300 |
Cadmium | 0.1 |
Chromium, Total | 0.3 |
Copper | 0.15 |
Cyanide | 0.2 |
Lead | 0.15 |
Manganese | No limit |
Mercury | 0.1 |
Molybdenum | 0.1 |
Nickel | 1.0 |
Nitrate | 8 |
Oil and Grease | 100 |
Phenol | 100 |
Selenium | 0.1 |
Silver | 0.02 |
Sulfide, Total | 6 |
Toluene | 1.0 |
TSS (Total Suspended Solids) | 325 |
Zinc | 0.4 |
(C) The City accepts, at its discretion, discharges of treated, contaminated groundwater to the POTW. In addition to allowing groundwater discharges to meet all the City technically based local limits, this chapter imposes several additional limits, not technically based, on groundwater discharges. The additional groundwater limits are:
(1) Total Petroleum Hydrocarbons: 10.0 mg/L;
(2) Total BTEX (Benzene, toluene, ethylbenzene, and xylenes): 1.0 mg/L;
(3) Any EPA priority pollutant other than the technically based local limits indicated for metals: 0.75 mg/L; and
(4) Any organic solvent: 1 mg/L.
(D) These limits are readily achievable by activated carbon technology. The EPA has established that the best available technology (BAT) economically achievable limit for volatile organic solvents and hydrocarbons associated with gasoline is five micrograms per liter (five mg/L).
(Prior Code, § 12-8-2) (Ord. 13-05, passed 3-25-2013)