(A) The standards for the allowable discharge of industrial wastewaters to the POTW are listed in this section.
(B) 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 section. 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.
(C) No person shall discharge wastewater containing in excess of the following local limits:
Pollutant | Limit (mg/i) |
Pollutant | Limit (mg/i) |
Arsenic | 0.06 |
Benzene | 0.03 |
Bis (2-ethylhexyl) phthalate | No limit |
BOD | 300 |
Cadmium | 0.1 |
Chromium, total | 0.3 |
Copper | 0.15 |
Cyanide | 0.2 |
Lead | 0.15 |
Manganese | No limit |
Molybdenum | 0.1 |
Mercury | 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 | 325 |
Zinc | 0.4 |
(D) The town accepts at its discretion discharges of treated, contaminated groundwater to the POTW. In addition to allowing groundwater discharges to meet all the town technically based local limits, the pretreatment ordinance imposes several additional limits, not technically based, on groundwater discharges.
(E) 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.
(4) Any organic solvent - 1 mg/l.
(F) 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 (5 mg/l).
(Ord. 09-03, passed 2-10-2009)