40 CFR 426.122: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

(a) Any manufacturing plant which produces incandescent lamp envelopes shall meet the following limitations with regard to the forming operations.

Effluent characteristic Effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed—

Metric units (g/kkg of furnace pull)

Oil 230.0 115.0

TSS 230.0 115.0

pH (1) (1)

English units (lb/1,000 lb of furnace pull)

Oil 0.23 0.115

TSS 0.23 0.115

pH (1) (1)

1 Within the range 6.0 to 9.0.

(b) Any manufacturing plant which frosts incandescent lamp envelopes shall meet the following limitations with regard to the finishing operations.

Effluent characteristic Effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed—

Metric units (g/kkg of product frosted)

Fluoride 230.0 115.0

Ammonia (1) (1)

TSS 460.0 230.0

pH (2) (2)

English units (lb/1000 lb of product frosted)

Fluoride 0.23 0.115

Ammonia (1) (1)

TSS 0.46 0.23

pH (2) (2)

1 No limitation.

2 Within the range 6.0 to 9.0.