Source: https://www.ecfr.gov/cgi-bin/retrieveECFR?gp=&mc=true&r=SUBPART&n=sp40.31.415.b
Timestamp: 2020-01-26 16:46:50
Document Index: 407382968

Matched Legal Cases: ['art 415', '§415', '§415', '§415', '§415', '§415', '§415', '§415', '§403', 'art 403', '§415']

Title 40 → Chapter I → Subchapter N → Part 415 → Subpart B
Subpart B—Aluminum Sulfate Production Subcategory
§415.20 Applicability; description of the aluminum sulfate production subcategory.
§415.21 Specialized definitions. [Reserved]
§415.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
§415.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
§415.24 Pretreatment standards for existing sources (PSES).
§415.25 New source performance standards (NSPS).
§415.26 Pretreatment standards for new sources (PSNS).
The provisions of this subpart are applicable to discharges and to the introduction of pollutants into treatment works which are publicly owned resulting from the production of aluminum sulfate.
(a) Subject to the provisions of paragraphs (b), (c) and (d) of this section, there shall be no discharge of process wastewater pollutants into navigable waters.
(b) A process wastewater impoundment which is designed, constructed and operated so as to contain the precipitation from the 10-year, 24-hour rainfall event as established by the National Climatic Center, National Oceanic and Atmospheric Administration for the area in which such impoundment is located may discharge that volume of process wastewater which is equivalent to the volume of precipitation that falls within the impoundment in excess of that attributable to the 10-year, 24-hour rainfall event, when such event occurs.
(c) During any calendar month there may be discharged from a process wastewater impoundment either a volume of process wastewater equal to the difference between the precipitation for that month that falls within the impoundment and the evaporation for that month, or if greater, a volume of process wastewater equal to the difference between the mean precipitation for that month that falls within the impoundment and the mean evaporation for that month as established by the National Climatic Center, National Oceanic and Atmospheric Administration for the area in which such impoundment is located (or as otherwise determined if no monthly data have been established by the National Climatic Center).
(d) Any process wastewater discharged pursuant to paragraph (c) of this section shall comply with each of the following requirements:
Subpart B—Aluminum Sulfate
TSS 50 25
PSES limitations
Zinc 5.0 2.5
Except as provided in §403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources (PSNS): The limitations are the same as the new source performance standards specified in §415.25.