40 CFR 415.226: Pretreatment standards for new sources (PSNS).

(a) Except as provided in 40 CFR 403.7, any new source subject to this subpart and producing titanium dioxide by the sulfate process 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):

Subpart V—Titanium Dioxide—Sulfate Process

Pollutant or pollutant property PSNS effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days

Milligrams per liter (mg/1)

Iron (T) 8.5 2.5

Chromium (T) 0.57 0.30

Nickel (T) 0.38 0.20

In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations for Iron (T), Chromium (T), and Nickel (T) are the same as specified in § 415.225(a).

(b) Except as provided in 40 CFR 403.7, any new source subject to this subpart and producing titanium dioxide by the chloride process 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):

Subpart V—Titanium Dioxide-Chloride Process

Pollutant or pollutant property PSNS effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days

Milligrams per liter (mg/1)

Iron (T) 5.3 1.6

Chromium (T) 0.23 0.12

In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as guidance: The limitations for Iron(T) and Chromium(T) are the same as specified in § 415.255(b).

(c) Except as provided in § 403.7, any new source subject to this subpart and producing titanium dioxide by the simultaneous beneficiation-chlorination (chloride-ilmenite) process 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):

Subpart V—Titanium Dioxide-Chloride-Ilmenite Process

Pollutant or pollutant property PSNS effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days

Milligrams per liter (mg/l)

Iron (T) 5.3 1.6

Chromium (T) 0.23 0.12

Nickel (T) 0.33 0.17

In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as an alternate: The limitations for Iron (T), Chromium (T), and Nickel (T) are the same as specified in § 415.225(c).