Part 425 — Leather Tanning and Finishing Point Source Category

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• Subpt. A Hair Pulp, Chrome Tan, Retan-Wet Finish Subcategory §§425.10 to 425.16
• Subpt. B Hair Save, Chrome Tan, Retan-Wet Finish Subcategory §§425.20 to 425.26
• Subpt. C Hair Save or Pulp, Non-Chrome Tan, Retan-Wet Finish Subcategory §§425.30 to 425.36
• Subpt. D Retan-Wet Finish-Sides Subcategory §§425.40 to 425.46
• Subpt. E No Beamhouse Subcategory §§425.50 to 425.56
• Subpt. F Through-the-Blue Subcategory §§425.60 to 425.66
• Subpt. G Shearling Subcategory §§425.70 to 425.76
• Subpt. H Pigskin Subcategory §§425.80 to 425.86
• Subpt. I Retan-Wet Finish-Splits Subcategory §§425.90 to 425.96

• §425.01 Applicability.
• §425.02 General definitions.
• §425.03 Sulfide analytical methods and applicability.
• §425.04 Applicability of sulfide pretreatment standards.
• §425.05 Compliance dates.
• §425.06 Monitoring requirements.