(A) The following pollutant limits are established to protect against pass through and interference. No user shall discharge wastewater containing in excess of the following instantaneous maximum allowable discharge limits:
May – November | 0.00344 mg/l arsenic |
December – April | 0.00344 mg/l arsenic |
May – December | 0.003068 mg/l cadmium |
December – April | 0.003067 mg/l cadmium |
May – November | 2.714 mg/l chromium (6, Hexavalent Chromium) |
November – April | 2.684 mg/l chromium (6, Hexavalent Chromium) |
May – November | 2.646 mg/l chromate, total |
November – April | 2.616 mg/l chromate, total |
May – November | 0.1934 mg/l copper |
December – April | 0.1919 mg/l copper |
May – November | 0.03480 mg/l lead |
December – April | 0.03458 mg/l lead |
May – November | 0.002733 mg/l mercury |
December – April | 0.002706 mg/l mercury |
May – November | 0.04873 mg/l nickel |
December – April | 0.04842 mg/l nickel |
May – November | 1,247.67 mg/l nitrogen, total kjeldahl |
December – April | 1,234.13 mg/l nitrogen, total kjeldahl |
102.88 mg/l oil and grease | |
May – November | 0.00883 mg/l selenium |
December – April | 0.00881 mg/l selenium |
10 mg/l settable solids | |
37 ml/l settable solids | |
May – November | 0.2764 mg/l zinc |
December – April | 0.2753 mg/l zinc |
Not less than 6.5, nor greater than 9.0 pH | |
(B) The following pollutant limits are established to protect against pass through and interference. No user shall discharge wastewater containing in excess of the following allowable discharge limits:
(1) BOD5 shall not exceed an instantaneous maximum allowable discharge limit of 712 mg/l, nor exceed a 30-day average of 475 mg/l;
(2) Total dissolved solids (TDS) shall not exceed an instantaneous maximum allowable discharge limit of 3,750 mg/l, nor exceed a 30-day average of 2,500 mg/l;
(3) Total suspended solids (TSS):
May – November | Shall not exceed an instantaneous maximum allowable discharge limit of 790 mg/l, nor exceed a 30-day average of 527 mg/l |
December – April | Shall not exceed an instantaneous maximum allowable discharge limit of 870 mg/l, nor exceed a 30-day average of 580 mg/l |
(4) Cyanide, amendable to chlorination:
May – November | Shall not exceed an instantaneous maximum allowable discharge limit of 0.354 mg/l nor exceed a 30-day average of 0.236 mg/l |
December – April | Shall not exceed an instantaneous maximum allowable discharge limit of 0.350 mg/l nor exceed a 30-day average of 0.233 mg/l |
(5) Sulfate/sulfide shall not exceed an instantaneous maximum allowable discharge limit of 1,778 mg/l, nor exceed a 30-day average of 1,185 mg/l.
(C) The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for “total” metal unless indicated otherwise. The Town Manager may impose mass limitations in addition to, or in place of, the concentration-based limitations above.
(Prior Code, § 155.2.4) (Ord. 489, passed 10-9-2003; Ord. 514, passed 3-6-2006)