Lone Star Chemical Plant

heavy

Corpus Christi, TX · Nueces County · Petrochemical Manufacturing (NAICS 325110)

1 · Permit Profile

Permit Type

TPDES Wastewater

Permit Number

WQ0004567-000

Regulatory Agency

TCEQ

Issued

Aug 1, 2020

Expires

Jul 31, 2025

Days Until Expiration

Expired

2 · Obligation Burden

By obligation type

Monitoring29

Reporting21

Recordkeeping18

Notification8

Operational Limit7

Maintenance3

Other1

Total87

By frequency

Daily / Continuous6

Monthly / Quarterly38

Annual29

Event-Triggered14

Daily/continuous obligations represent the highest operational load — they require ongoing staffing or automated monitoring systems.

3 · Key Obligations

Obligation	Type	Frequency	Due Date Logic
Daily flow monitoring at Outfall 001	Monitoring	Daily	Grab sample 8–10 AM daily
Monthly BOD5 composite sampling	Monitoring	Monthly	First week of each month
Quarterly metals analysis (Cu, Zn, Pb)	Monitoring	Quarterly	Mar, Jun, Sep, Dec
Discharge monitoring report submission	Reporting	Monthly	By 20th of following month via NeT-DMR
Unauthorized discharge notification	Notification	Event-triggered	Within 2 hours by phone, 24 hours in writing
Annual effluent characterization study	Monitoring	Annual	Complete by June 30 each year
Semi-annual groundwater monitoring well sampling	Monitoring	Semi-annual	May and November
Quarterly SWPPP implementation review	Recordkeeping	Quarterly	Document findings within 14 days of review
Annual training records for permit compliance staff	Recordkeeping	Annual	Retain for minimum 3 years
Permit renewal application	Reporting	Event-triggered	180 days before permit expiration

Showing top 10 obligations by operational intensity. Source text from the permit document is not shown publicly.

4 · Operational Complexity

heavyOperational Complexity Tier

Lone Star Chemical Plant carries a heavy operational compliance profile. Its 87 obligations include 29 monitoring requirements and 14 event-triggered notifications. Facilities at this complexity level generally require a structured compliance calendar and regular third-party review to stay current.

This view reflects the administrative complexity of the permit obligations found in the public permit document. It is not a compliance status or legal assessment. Obligation data is derived from publicly available permit documents processed through Indigoscale's extraction pipeline.

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Data derived from publicly available permit documents. ← Back to directory