NSPS Notebook
Synthetic Organic Chemical Manufacturing Industry - Wastewater -  Subpart YYY

Applicability: {This subpart has only been proposed.}

An affected facility is a designated chemical process unit (CPU) in the synthetic organic chemical manufacturing industry which generates a process wastewater stream, a maintenance wastewater stream, of an aqueous in-process stream and which commences or commenced construction, reconstruction or modification after September 12, 1994. {Regulates the VOC emissions.}

A designated CPU is all process lines with the primary product is a SOCMI chemical. Each storage vessel that is part of the CPU shall be assigned to one designated CPU that it services.

(See attached file: SOCMI Chemicals - Subpart YYY.pdf)(File Size 112KB)

The following water and wastewater streams can be part of the affected facility but are not subject to NSPS Subpart A or YYY (per §60.770(h)(3)):
(1) Stormwater managed in segregated sewers.
(2) Water from fire-fighting and deluge systems in segregate sewers.
(3) Spills.
(4) Water from safety showers.
(5) Water from testing of deluge systems.
(6) Water from testing of firefighting systems.

Re-evaluation of applicability (not more than once every 12 months):
(1) Change (begins or ceases manufacturing) of chemical (s) used in the primary product determination -- Re-evaluate the primary product determination per §60.770(f).
(2) If designated CPU is modified or reconstructed.
Known Sources in NDEE Jurisdiction:
Date of Original Final Rule:
Amendments Dates:
State Regulations: This rule has only been proposed. It has not been finalized by EPA and is therefore not adopted.
Federal Regulations: 40 CFR 60.770
Related Rules:

NSPS - 40 CFR Part 60

Subparts VV and VVa - SOCMI leaks
Subpart III - SOCMI air oxidation unit
Subpart NNN - SOCMI distillation
Subpart RRR - SOCMI reactor processes

NESHAP - 40 CFR Part 63
Subpart FFFF - Misc. organic chemical production & processes (MON)
Subparts F/G/H: - HON (hazardous organic NESHAP)
Subpart J - Polyvinyl chloride and copolymers production,
Subpart DDDDDD - Polyvinyl chloride and copolymers production,
Subparys U/W/JJJ/OOO - Polymers & Resins
Subpart XX - Ethylene mfg,
Subpart PPP - Polyether polyols production,
Subpart HHHHH - Miscellaneous coating mfg,
Subpart VVVVVV - Chemical mfg,
Subpart BBBBBBB - Chemical preparation
Subpart CCCCCCC - Paints and allied products mfg
Regulations and Federal Registers: (See attached file: 3Y - Fed. Reg. 12-09-1998 reproposal 1st part.pdf)(See attached file: 3Y - Fed. Reg. 12-09-1998 reproposal 2nd part.pdf)
(See attached file: 3Y - Fed. Reg. 12-09-1998 reproposal 3rd part.pdf)

SizeFile Name
220 KB 3Y - Fed. Reg. 12-09-1998 reproposal 1st part.pdf
268 KB 3Y - Fed. Reg. 12-09-1998 reproposal 2nd part.pdf
250 KB 3Y - Fed. Reg. 12-09-1998 reproposal 3rd part.pdf
FAQs, Fact Sheets, and Rule Summaries:
Other Information and Resources:
Page Last Updated: 12/21/22