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Industrial stormwater facility

Imerys Filtration Minerals Inc

3 42I001625 · Notice of Intent · Lompoc, Santa Barbara

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

Official

Facility record

Facility name
Imerys Filtration Minerals Inc
WDID
3 42I001625
Application type
Notice of Intent
City
Lompoc
County
Santa Barbara
ZIP
93436
Primary SIC code
1499
SIC description
Miscellaneous Nonmetallic Minerals, Except Fuels
Date active
1992-03-27
Regional Water Board
Regional Board 3 - Central Coast Region

Hydrologic

Geographic context

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

Official facility point
34.60879, -120.46410
HUC12 subwatershed
San Miguelito Creek-Santa Ynez River
HUC12 code
180600100703
Impaired-water associations (derived)
4
Loading map…

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Subwatershed + nearby

1 waterbodies
San Miguelito Creek

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (7) Chloride, Nitrate, Oxygen, Dissolved, pH, Sodium, Temperature, water +1 more

Distance 0.05 km

Confidence high

Fact sheet

Same impaired-water subwatershed

3 waterbodies
Salsipuedes Creek (Santa Barbara County)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (3) Chloride, Escherichia coli (E. coli), Sodium

Distance

Confidence low

Fact sheet

Santa Ynez River (below city of Lompoc to Ocean)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (11) Benthic Community Effects, Chloride, Escherichia coli (E. coli), Molybdenum, Nitrate, Oxygen, Dissolved +5 more

Distance

Confidence low

Fact sheet

Santa Ynez River (Cachuma Lake to below city of Lompoc)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Benthic Community Effects, Molybdenum, Oxygen, Dissolved, Sedimentation/Siltation, Sodium, Temperature, water +2 more

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
129
Sample events
43
Distinct parameters
3
Reporting years
2015 – 2023
First sample
2016-01-06
Latest sample
2024-02-19
Source regional dataset
Region 3 - Central Coast
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 129
Sample dateLocationParameterResultUnitsEvent
2024-02-19SP1Oil and Grease4.6mg/LQualifying Storm Event
2024-02-19SP1pH7.8SUQualifying Storm Event
2024-02-19SP1Total Suspended Solids (TSS)14mg/LQualifying Storm Event
2024-02-19SP2Oil and Grease8.2mg/LQualifying Storm Event
2024-02-19SP2pH7.89SUQualifying Storm Event
2024-02-19SP2Total Suspended Solids (TSS)270mg/LQualifying Storm Event
2024-02-19SP4Oil and Grease4.7mg/LQualifying Storm Event
2024-02-19SP4pH7.8SUQualifying Storm Event
2024-02-19SP4Total Suspended Solids (TSS)39mg/LQualifying Storm Event
2024-02-01SP1Oil and Grease3.6mg/LQualifying Storm Event
2024-02-01SP1pH8.42SUQualifying Storm Event
2024-02-01SP1Total Suspended Solids (TSS)39mg/LQualifying Storm Event
2024-02-01SP2Oil and Grease1.9mg/LQualifying Storm Event
2024-02-01SP2pH8.47SUQualifying Storm Event
2024-02-01SP2Total Suspended Solids (TSS)37mg/LQualifying Storm Event
2024-02-01SP3Oil and Grease2.7mg/LQualifying Storm Event
2024-02-01SP3pH7.67SUQualifying Storm Event
2024-02-01SP3Total Suspended Solids (TSS)56mg/LQualifying Storm Event
2024-02-01SP4Oil and Grease6.9mg/LQualifying Storm Event
2024-02-01SP4pH8.56SUQualifying Storm Event
2024-02-01SP4Total Suspended Solids (TSS)67mg/LQualifying Storm Event
2023-12-20SP1Oil and Grease2mg/LQualifying Storm Event
2023-12-20SP1pH7.9SUQualifying Storm Event
2023-12-20SP1Total Suspended Solids (TSS)4.6mg/LQualifying Storm Event
2023-12-20SP2Oil and Grease9.7mg/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
8
Years with an NAL exceedance
4
Most recent evaluated year
RY 2023
Ruleset
igp_nal_ruleset_v1 / igp_nal_v1
ParameterNAL typeCalculated valueNALResultSamples usedMethod

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.11 eligiblecount 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.11 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.11 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

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
3 42I001625
Source feature ID
10925
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