Table 10 Effluent Limitations mgL for Subpart A Phosphate Fertilizer

Effluent characteristic

Maximum for any Average of daily values for 30 _1 day__consecutive days shall not exceed

Total phosphorus (as P)

Fluoride

105 75 150

35 25 50

Total phosphorus (as P) Fluoride

35 25

Total phosphorus (as P) Fluoride

35 25

TSS

150

50

(e) Contaminated nonprocess

wastewater

Total phosphorus (as P)

105

35

Fluoride

75

25

BPT, best practicable control technology currently available; BAT, best available technology economically available; BCT, best conventional pollutant control technology; NSPS, standards of performance for new sources. Source: Ref. 9.

BPT, best practicable control technology currently available; BAT, best available technology economically available; BCT, best conventional pollutant control technology; NSPS, standards of performance for new sources. Source: Ref. 9.

produce NPK grades in varying proportions [22]. According to Subpart O, "mixed fertilizer" means a mixture of wet and/or dry straight fertilizer materials, mixed fertilizer materials, fillers, and additives prepared through chemical reaction to a given formulation, whereas "blend fertilizer" means a mixture of dry, straight, and mixed fertilizer materials. The effluent limitations guidelines for BPT, BCT, and BAT, and the standards of performance for new sources, allow no discharge of process wastewater pollutants to navigable waters. Finally, the pretreatment standards establishing the quantity of pollutants that may be discharged to publicly owned treatment works (POTW) by a new source are given in Table 11.

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