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Industrial stormwater facility

Unicorn Metals

8 30MR000035 · Region 8 - Scrap Metal Permit · La Habra, Orange

Official record — State Water Resources Control Board, Industrial General Permit

Official

Facility record

Facility name
Unicorn Metals
WDID
8 30MR000035
Application type
Region 8 - Scrap Metal Permit
City
La Habra
County
Orange
ZIP
90631
Primary SIC code
5093
SIC description
Scrap and Waste Materials
Date active
2012-06-25
Regional Water Board
Regional Board 8 - Santa Ana Region

Hydrologic

Geographic context

Official facility coordinate plotted against the official 2026 impaired-water geometry.

Official facility point
33.92797, -117.94315
HUC12 subwatershed
Brea Creek-Coyote Creek
HUC12 code
180701060603
Impaired-water associations (derived)
1
Loading map…

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Subwatershed + nearby

1 waterbodies
Coyote Creek

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Aluminum, Chlorine, Copper, Dissolved, Indicator Bacteria, Iron, Malathion +2 more

Distance 0.10 km

Confidence high

Fact sheet

Associations are calculated from official facility coordinates, USGS HUC12 boundaries, and official 2026 impaired-water geometry. They do not establish a discharge connection or causation.

TMDL requirements

Water Board-stated TMDL waste load allocations applied to this industrial permit in SMARTS.

Official record — SMARTS TMDL dataset, State Water Board

No SMARTS TMDL requirement is recorded for this WDID. In the statewide TMDL export only permits in Regions 4, 8 and 9 currently carry industrial TMDL requirements, so an absence here is not a statement that the facility discharges to an unimpaired water.

Official monitoring

SMARTS monitoring

Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.

Official record — SMARTS parameter data, State Water Board
Reported results
456
Sample events
34
Distinct parameters
20
Reporting years
2012 – 2025
First sample
2012-12-03
Latest sample
2026-02-17
Source regional dataset
Region 8 - Santa Ana
Source retrieved
Aug 21, 2026

Official SMARTS public reports

Parameters reported

Reported results over time

Loading reported results…

Most recent reported results

Latest 25 of 456
Sample dateLocationParameterResultUnitsEvent
2026-02-17325 E 4th StreetAluminum149ug/LRain Event
2026-02-17325 E 4th StreetChemical oxygen demand (COD)152mg/LRain Event
2026-02-17325 E 4th StreetCopper26ug/LRain Event
2026-02-17325 E 4th StreetElectrical Conductivity145umhos/cmRain Event
2026-02-17325 E 4th StreetIron235ug/LRain Event
2026-02-17325 E 4th StreetLead19ug/LRain Event
2026-02-17325 E 4th StreetOil and Grease< 1(non-detect / est.)mg/LRain Event
2026-02-17325 E 4th StreetpH7SURain Event
2026-02-17325 E 4th StreetTurbidity8.8NTURain Event
2026-02-17325 E 4th StreetZinc35ug/LRain Event
2025-11-21325 E 4th StreetAluminum< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetAluminum< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetChemical oxygen demand (COD)128mg/LRain Event
2025-11-21325 E 4th StreetChemical oxygen demand (COD)128mg/LRain Event
2025-11-21325 E 4th StreetCopper< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetCopper< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetElectrical Conductivity76.1umhos/cmRain Event
2025-11-21325 E 4th StreetElectrical Conductivity76.1umhos/cmRain Event
2025-11-21325 E 4th StreetIron< 50(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetIron< 50(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetLead< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetLead< 5(non-detect / est.)ug/LRain Event
2025-11-21325 E 4th StreetOil and Grease< 1(non-detect / est.)mg/LRain Event
2025-11-21325 E 4th StreetOil and Grease< 1(non-detect / est.)mg/LRain Event
2025-11-21325 E 4th StreetpH7.5SURain Event

Monitoring rows are official self-reported SMARTS submissions, joined to this facility by WDID. California Stormwater Intelligence does not restate, correct, average or evaluate reported values, and no benchmark comparison or violation determination is made.

YDOS-derived

Numeric Action Level comparison

Reported SMARTS analytical results compared against the Numeric Action Levels of the Industrial General Permit version in effect for each reporting year (July 1 – June 30).

Derived
Reporting years evaluated
11
Years with an NAL exceedance
4
Most recent evaluated year
RY 2025
Ruleset
igp_nal_ruleset_v1 / igp_nal_v1
ParameterNAL typeCalculated valueNALResultSamples usedMethod

Aluminum, Total Recoverable

aluminum_total

Annual0.05 mg/L0.75 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.07× threshold3 eligible2 non-detect as zeroarithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Chemical Oxygen Demand (COD)

cod

Annual136 mg/L120 mg/LAbove NALAnnual average of 3 eligible result(s) compared with the annual NAL.1.13× threshold3 eligiblearithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Copper, Total Recoverable

copper_total

Annual0.009 mg/L0.033 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.26× threshold3 eligible2 non-detect as zeroarithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Iron, Total Recoverable

iron_total

Annual0.078 mg/L1 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.08× threshold3 eligible2 non-detect as zeroarithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Lead, Total Recoverable

lead_total

Annual0.006 mg/L0.262 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.02× threshold3 eligible2 non-detect as zeroarithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

Oil and Grease

oil_grease

Instantaneous maximum0 samples above25 mg/LAt or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.3 eligible3 non-detect as zerocount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

pH

ph

Instantaneous maximum0 samples above6 – 9 pH unitsWithin NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL.3 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

Zinc, Total Recoverable

zinc_total

Annual0.019 mg/L0.26 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.07× threshold3 eligiblearithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported)

YDOS-derived overlap

Pollutant overlap with impaired receiving waters

Parameters where this facility has an NAL exceedance in at least one reporting year and the geographically associated waterbody carries a 303(d) listing for the same pollutant.

Derived

AluminumMonitoringAbove NAL303(d) impairmentCoyote Creek

1 reporting year above the annual NAL, most recently RY 2016 · 1 303(d) listing · association: derived nearby in watershed (high confidence)

IronMonitoringAbove NAL303(d) impairmentCoyote Creek

1 reporting year above the annual NAL, most recently RY 2015 · 1 303(d) listing · association: derived nearby in watershed (high confidence)

Overlap is informational co-occurrence between a derived NAL comparison and an official 303(d) listing. It is not evidence that this facility caused or contributed to the impairment.

An NAL exceedance is a permit-defined condition that triggers Exceedance Response Actions under the Industrial General Permit. It is not a violation, an enforcement action, or a Water Board compliance determination. Annual values use the arithmetic average of eligible results with non-detects treated as zero; instantaneous maximum NALs (total suspended solids, oil and grease, pH) are exceeded when two or more eligible results in a reporting year fall outside the level. Rules transcribed from 2014-0057-DWQ as amended by 2015-0122-DWQ (effective 2015-07-01, superseded 2020-06-30); 2014-0057-DWQ as amended by 2018-0028-DWQ (effective 2020-07-01).

Provenance

Source & provenance

Source agency
California State Water Resources Control Board
Source dataset
Industrial General Permit — permitted facilities (statewide GIS layer)
WDID
8 30MR000035
Source feature ID
19682
Application type
Region 8 - Scrap Metal Permit
Regional board derivation
WDID region prefix
Geometry status
valid
Last successful facility import
Aug 21, 2026, 1:57 AM UTC

Official IGP permitted facilities feature layer