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Industrial stormwater facility

West Colton Yard

8 36I004573 · Notice of Intent · Bloomington, San Bernardino

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

Official

Facility record

Facility name
West Colton Yard
WDID
8 36I004573
Application type
Notice of Intent
City
Bloomington
County
San Bernardino
ZIP
92316
Primary SIC code
4011
SIC description
Railroads, Line-haul Operating
Date active
1992-04-08
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
34.06487, -117.37454
HUC12 subwatershed
East Etiwanda Creek-Santa Ana River
HUC12 code
180702030804
Impaired-water associations (derived)
4
Loading map…

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Same impaired-water subwatershed

4 waterbodies
Prado Basin Management Zone

Wetland, Freshwater · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (1) pH

Distance

Confidence low

Fact sheet

Santa Ana River, Reach 3

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (7) Benthic Community Effects, Bifenthrin, Copper, Indicator Bacteria, Lead, Pyrethroids +1 more

Distance

Confidence low

Fact sheet

Santa Ana River, Reach 4

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (3) DDT (Dichlorodiphenyltrichloroethane), Indicator Bacteria, Oil and Grease

Distance

Confidence low

Fact sheet

Warm Creek

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (1) Indicator Bacteria

Distance

Confidence low

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
965
Sample events
104
Distinct parameters
12
Reporting years
2015 – 2025
First sample
2015-12-14
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 965
Sample dateLocationParameterResultUnitsEvent
2026-02-17SW-06AAluminum3mg/LQualifying Storm Event
2026-02-17SW-06ACopper, Dissolved.0089mg/LQualifying Storm Event
2026-02-17SW-06ACopper.069mg/LQualifying Storm Event
2026-02-17SW-06AIron7.1mg/LQualifying Storm Event
2026-02-17SW-06AOil and Grease< 1.3(non-detect / est.)mg/LQualifying Storm Event
2026-02-17SW-06ApH7.4SUQualifying Storm Event
2026-02-17SW-06ATotal Suspended Solids (TSS)54mg/LQualifying Storm Event
2026-02-17SW-06AZinc, Dissolved.028mg/LQualifying Storm Event
2026-02-17SW-06AZinc.39mg/LQualifying Storm Event
2026-01-05SWT-1AAluminum1.8mg/LQualifying Storm Event
2026-01-05SWT-1ACopper, Dissolved.0051mg/LQualifying Storm Event
2026-01-05SWT-1ACopper.011mg/LQualifying Storm Event
2026-01-05SWT-1AIron2.6mg/LQualifying Storm Event
2026-01-05SWT-1AOil and Grease< 1.4(non-detect / est.)mg/LQualifying Storm Event
2026-01-05SWT-1ApH7.4SUQualifying Storm Event
2026-01-05SWT-1ATotal Suspended Solids (TSS)25.8mg/LQualifying Storm Event
2026-01-05SWT-1AZinc, Dissolved.083mg/LQualifying Storm Event
2026-01-05SWT-1AZinc.15mg/LQualifying Storm Event
2026-01-05SWT-2AAluminum.11mg/LQualifying Storm Event
2026-01-05SWT-2ACopper, Dissolved< .00027(non-detect / est.)mg/LQualifying Storm Event
2026-01-05SWT-2ACopper.001mg/LQualifying Storm Event
2026-01-05SWT-2AIron.11mg/LQualifying Storm Event
2026-01-05SWT-2AOil and Grease< 1.4(non-detect / est.)mg/LQualifying Storm Event
2026-01-05SWT-2ApH7.2SUQualifying Storm Event
2026-01-05SWT-2ATotal Suspended Solids (TSS)8.9mg/LQualifying Storm 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
11
Most recent evaluated year
RY 2025
Ruleset
igp_nal_ruleset_v1 / igp_nal_v1
ParameterNAL typeCalculated valueNALResultSamples usedMethod

Aluminum, Total

aluminum_total

Annual6.308 mg/L0.75 mg/LAbove NALAnnual average of 10 eligible result(s) compared with the annual NAL.8.41× threshold10 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

copper_total

Annual0.038 mg/L0.033 mg/LAbove NALAnnual average of 10 eligible result(s) compared with the annual NAL.1.14× threshold10 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)

Iron, Total

iron_total

Annual8.641 mg/L1 mg/LAbove NALAnnual average of 10 eligible result(s) compared with the annual NAL.8.64× threshold10 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)

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.10 eligible5 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.10 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

Total Suspended Solids (TSS)

tss

Instantaneous maximum1 sample above400 mg/LAt or below NALOne eligible result in this reporting year was outside the instantaneous maximum NAL. The Order states the condition as two or more results in one reporting year.10 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

Zinc, Total

zinc_total

Annual0.352 mg/L0.26 mg/LAbove NALAnnual average of 10 eligible result(s) compared with the annual NAL.1.36× threshold10 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

CopperMonitoringAbove NAL303(d) impairmentSanta Ana River, Reach 3

9 reporting years above the annual NAL, most recently RY 2025 · 1 303(d) listing · association: derived watershed association (low confidence)

pHMonitoringAbove NAL303(d) impairmentPrado Basin Management Zone

1 reporting year above the instantaneous maximum NAL, most recently RY 2020 · 1 303(d) listing · association: derived watershed association (low 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 36I004573
Source feature ID
16593
Application type
Notice of Intent
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