40 CFR 430.12: Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

(a) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT), except that non-continuous dischargers shall not be subject to the maximum day and average of 30 consecutive days limitations but shall be subject to annual average effluent limitations:

Subpart A

[BPT effluent limitations]

Pollutant or pollutant property Kg/kkg (or pounds per 1,000 lb) of product

Continuous dischargers Non-continuous dischargers

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

BOD5 23.6 12.25 6.88

TSS 37.3 20.05 11.02

pH (1) (1) (1)

1 Within the range of 5.0 to 9.0 at all times.

(b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, resulting from the use of wet barking operations, which may be discharged by a point source subject to the provisions of this subpart. These limitations are in addition to the limitations set forth in paragraph (a) of this section and shall be calculated using the proportion of the mill's total production due to use of logs which are subject to such operations. Non-continuous dischargers shall not be subject to the maximum day and average of 30 consecutive days limitations, but shall be subject to annual average effluent limitations:

Subpart A

[BPT effluent limitations]

Pollutant or pollutant property Kg/kkg (or pounds per 1,000 lb) of product

Continuous dischargers Non-continuous dischargers (annual average)

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

BOD5 3.2 1.7 0.95

TSS 6.9 3.75 2.0

pH (1) (1) (1)

1 Within the range of 5.0 to 9.0 at all times.

(c) The following limitations establish the quantity or quality of pollutants or pollutant parameters, controlled by this section, resulting from the use of log washing or chip washing operations, which may be discharged by a point source subject to the provisions of this subpart. These limitations are in addition to the limitations set forth in paragraph (a) of this section and shall be calculated using the proportion of the mill's total production due to use of logs and/or chips which are subject to such operations. Non-continuous dischargers shall not be subject to the maximum day and average of 30 consecutive days limitations, but shall be subject to the annual average effluent limitations:

Subpart A

[BPT effluent limitations]

Pollutant or pollutant property Kg/kkg (or pounds per 1,000 lb) of product

Continuous dischargers Non-continuous dischargers (annual average)

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

BOD5 0.35 0.2 0.1

TSS 0.70 0.4 0.2

pH (1) (1) (1)

1 Within the range of 5.0 to 9.0 at all times.

(d) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, resulting from the use of log flumes or log ponds, which may be discharged by a point source subject to the provisions of this subpart. These limitations are in addition to the limitations set forth in paragraph (a) of this section and shall be calculated using the proportion of the mill's total production due to use of logs which are subject to such operations. Non-continuous dischargers shall not be subject to the maximum day and average of 30 consecutive days limitations but shall be subject to the annual average effluent limitations:

Subpart A

[BPT effluent limitations]

Pollutant or pollutant property Kg/kkg (or pounds per 1,000 lb) of product

Continuous dischargers Non-continuous dischargers (annual average)

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

BOD5 0.6 0.35 0.2

TSS 1.45 0.8 0.4

pH (1) (1) (1)

1 Within the range of 5.0 to 9.0 at all times.