Concentration-based limitations.

No person shall discharge, directly or indirectly, into the POTW, any discharge which would exceed the permit standard wastewater containing any of the following substances in concentrations exceeding those specified below on either a daily or an instantaneous basis, except by permit or as provided for in § 257-74. Concentration limits are applicable to wastewater effluents at the point just prior to discharge into the POTW ("end of pipe" concentrations).A. Permissible concentration of toxic substances.(1) With the exception of sewer users covered by the federal categorical pretreatment standards, the concentration in sewage of any of the following toxic substances shall not exceed the twenty-four-hour average or thirty-day average concentration limits specified below when discharged into the public sewer.(2) Sewer users covered by the federal categorical pretreatment standards shall comply with applicable federal standards.

For these users, substances not regulated by the categorical pretreatment standards shall not exceed the concentration limits specified below. For substances regulated by the categorical pretreatment standards, determination of concentration shall be at the discharge into the sewer with the dilution attributed to nonprocess flow excluded as determined by the combined waste stream formula (40 CFR 403.6).(3) The Town of Webster may revise with its rules and regulations the following limits or insert additional items after hearing when, in the opinion of the Chief Plant Operator and/or Superintendent of Sewers or County Department of Health, the need for a rule change is indicated, or as provided in the federal categorical pretreatment standards.(4) The following list contains the permitted toxic substances and levels of concentration.Permitted Toxic Substances and Levels of ConcentrationSubstance24-Hour Average(mg/l)30-Day Average(mg/l)Arsenic (As)1.00.5Barium (Ba)4.02.0Cadmium (Cd)0.80.4Chromium, total (Cr)1.600.80Cyanide, total (CN)3.01.5Cyanide, free (CN)1.00.50Dissolved copper (Cu)1.60.80Iron (Fe)10.05.0Lead (Pb)1.00.50Manganese (Mn)8.04.0Nickel (Ni)2.01.0Selenium (Se)4.02.0Soluble silver (Ag)2.01.0Zinc (Zn)4.02.0(5) Special concentration limits.

When findings of the Town of Webster show that the volume of a single toxic industrial waste discharge or a combined toxic industrial waste discharge of a group of industries within a single contributory area is so large as to raise a question of the ultimate concentration of toxic substances entering the POTW, or in cases where it is known that the toxic substances in the concentrations involved will be effectively removed by the POTW without causing deleterious effects of any kind to the treatment process, the treatment plant, sludge, or the receiving waters after treatment, the Town of Webster may rule that separate or special concentration limits shall be used by the contributors in that area.

Concentration limits at variance with the federal categorical pretreatment standards will not be granted.B. In addition to the above-mentioned limits, the maximum allowable industrial loadings that the Town POTW and the Village POTW Headwork's can handle are listed in the following tables, and these local limits shall be implemented through sewer use permits.Maximum Allowable Industrial LoadingMaximum Allowable Industrial LoadingPollutant of ConcernTownVillageAmmonia40 mg/l40 mg/lArsenic2.52 pounds per day1.4 pounds per dayCadmium1.89 pounds per day0.54 pounds per dayChromium (total)10.4 pounds per day1.89 pounds per dayDissolved copper6.3 pounds per day1.3 pounds per dayCyanide (total)2.9 pounds per day22.5 pounds per dayFree cyanide0.5 mg/l0.5 mg/lIron10.0 mg/l10.0 mg/lLead1.0 mg/l1.0 mg/lManganese12.0 pounds per day42.0 pounds per dayNickel11.3 pounds per day4.1 pounds per daySelenium0.36 pounds per day0.18 pounds per dayDissolved silver0.15 pounds per day0.11 pounds per dayTotal phenols1.0 mg/l1.0 mg/lTotal toxic organics2.13 mg/l2.13 mg/lZinc4.45 pounds per day1.75 pounds per day(1) All concentrations listed for metallic substances shall be as "total metal" unless otherwise stated.(2) As determined on a composite sample taken from the user's daily discharge over a typical operational and/or production day, except for cyanide, phenol, pH, oil and grease, which shall be determined using grab samples.C.

The limits for organic pollutants other than those listed in this section and higher than the minimum detection limits as established by 40 CFR Part 136 and/or the current edition of Standard Methods shall be set on a case-by-case basis. These limits shall be determined by the Chief Plant Operator and/or Superintendent of Sewers using screening level criteria, process biological treatability, safety criteria, receiving water quality criteria, sludge disposal options, New York State Department of Environmental Conservation's "Operational Guidance Manuals" and USEPA guidelines, etc.D. Other substances which may be limited are: antibiotics; asbestos; chemical compounds which, upon acidification, alkalinization, oxidation or reduction in the discharge or after admixture with wastewater and its components in the POTW, produce toxic, flammable, or explosive compounds; pesticides, including algicides, fungicides, herbicides, insecticides, and rodenticides; polyaromatic hydrocarbons; and viable pathogenic organisms from industrial processes or hospital procedures.