Structural Composites Industries LLC
Terminated WDID 4 19I016947 Pomona, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Pomona, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Identified receiving water on the 2026 303(d) list
- Not established
- Shown only when the reported receiving water is identified and corroborated.
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- 3 waterbodies; 3 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 343 distinct results, 5 reporting years (2015 to 2023)
- Most recent sample Apr 06, 2024 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 4 inspections · 8 violation records · 5 enforcement actions
- Counts as published in SMARTS; not a compliance determination · Details
Each label shows where a statement comes from. How to read the labels.
Overview and location
Reported facility location HUC12 watershed Corroborated receiving water 2026 Integrated Report waterbodies nearby
Reported location Evidence: facility-reported
- Coordinates
- 34.04881, -117.80748
- Precision
- 5 decimal places
- Shared point
- No
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 336 Enterprise Pl, Pomona 91768
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Upper San Jose Creek HUC12 180701060501
The facility's reported location lies within this HUC12 watershed (spatial derivation); it is not a discharge location.
Permits and applications Evidence: SMARTS record
Current permit record
- Permit type
- Industrial
- Application type
- Notice of Intent (WDID code I)
- Status
- Terminated
- Operator
- Worthington Industries
- Primary industry (SIC)
- 3469-Metal Stamping, NEC
- Secondary SIC
- 3443-Fabricated Plate Work (Boiler Shops)
- Application ID
- 191294
- NOI processed
- Nov 26, 2001
- Termination effective
- Oct 15, 2024
- Last certified
- Jul 06, 2021
- Facility size
- 330000 SqFt
- Impervious area
- 91.25 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 191294 | Industrial | Terminated | Nov 26, 2001 | Oct 15, 2024 | Jul 06, 2021 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- S San Jose Creek
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Impaired waters and TMDLs
Two kinds of information, kept apart: 2026 Integrated Report waterbodies near the reported location (geographic proximity only), and TMDL records that SMARTS lists for this facility. Neither establishes where the facility discharges; see Receiving water for the facility's own statement.
Nearby waterbodies Evidence: geographic proximity
Spatial proximity only; discharge pathway not established. Being near a waterbody does not mean the facility discharges to it.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| South San Jose Creek (Los Angeles County) CAR4055100020110328104701 | 217 m | listed | 1 |
| San Jose Creek Reach 2 (Temple to I-10 at White Ave.) CAR4055100019980918093038 | 765 m | listed | 1 |
| San Jose Creek Reach 1 (SG Confluence to Temple St.) CAR4053100019980918090950 | 876 m | listed | 5 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
No TMDL records for this facility in the SMARTS TMDL export.
Reported monitoring results Evidence: facility-reported
Numeric Action Level (NAL) screening is being independently validated and is not shown. Nothing on this page states whether a result exceeded a NAL.
343 distinct measurements across 9 parameters, most recent sample Apr 06, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 28 | 7 | 0 | Feb 02, 2024 | Apr 06, 2024 |
| 2019 | 84 | 7 | 0 | Dec 04, 2019 | Apr 06, 2020 |
| 2018 | 63 | 7 | 0 | Nov 29, 2018 | Mar 06, 2019 |
| 2016 | 84 | 9 | 0 | Dec 16, 2016 | Feb 06, 2017 |
| 2015 | 84 | 7 | 0 | Sep 15, 2015 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 49 | 2 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 49 | 1 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Oil and Grease | mg/L | 49 | 44 | Sep 15, 2015 | Apr 06, 2024 | Results |
| pH | SU | 49 | 0 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 49 | 6 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Iron, Total | mg/L | 43 | 3 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Zinc, Total | mg/L | 43 | 0 | Sep 15, 2015 | Apr 06, 2024 | Results |
| Iron, Total Recoverable | mg/L | 6 | 0 | Jan 19, 2017 | Feb 06, 2017 | Results |
| Zinc, Total Recoverable | mg/L | 6 | 0 | Jan 19, 2017 | Feb 06, 2017 | Results |
All results (343 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 06, 2024 | Aluminum, Total | .072 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Apr 06, 2024 | Iron, Total | .131 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Apr 06, 2024 | Nitrite Plus Nitrate (as N) | .049 | mg/L | Influent | Qualifying Storm Event | A4500NE | 1313723 | |
| Apr 06, 2024 | Oil and Grease | 1 | mg/L | Influent | Qualifying Storm Event | E1664A | 1313723 | |
| Apr 06, 2024 | pH | 7.32 | SU | Influent | Qualifying Storm Event | A4500HB | 1313723 | |
| Apr 06, 2024 | Total Suspended Solids (TSS) | 1 | mg/L | Influent | Qualifying Storm Event | A2540D | 1313723 | |
| Apr 06, 2024 | Zinc, Total | .207 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Aluminum, Total | .072 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Aluminum, Total | 1.62 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Aluminum, Total | .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Iron, Total | .131 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Iron, Total | 2.25 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Iron, Total | .137 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Nitrite Plus Nitrate (as N) | .049 | mg/L | Influent | Qualifying Storm Event | A4500NE | 1313723 | |
| Feb 02, 2024 | Nitrite Plus Nitrate (as N) | .068 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1313723 | |
| Feb 02, 2024 | Nitrite Plus Nitrate (as N) | .074 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1313723 | |
| Feb 02, 2024 | Oil and Grease | 1 | mg/L | Influent | Qualifying Storm Event | E1664A | 1313723 | |
| Feb 02, 2024 | Oil and Grease | 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1313723 | |
| Feb 02, 2024 | Oil and Grease | 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1313723 | |
| Feb 02, 2024 | pH | 7.32 | SU | Influent | Qualifying Storm Event | A4500HB | 1313723 | |
| Feb 02, 2024 | pH | 7.08 | SU | Effluent | Qualifying Storm Event | A4500HB | 1313723 | |
| Feb 02, 2024 | pH | 6.69 | SU | Effluent | Qualifying Storm Event | A4500HB | 1313723 | |
| Feb 02, 2024 | Total Suspended Solids (TSS) | 1 | mg/L | Influent | Qualifying Storm Event | A2540D | 1313723 | |
| Feb 02, 2024 | Total Suspended Solids (TSS) | 13 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1313723 | |
| Feb 02, 2024 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1313723 | |
| Feb 02, 2024 | Zinc, Total | .207 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Zinc, Total | .255 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Feb 02, 2024 | Zinc, Total | .034 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1313723 | |
| Apr 06, 2020 | Aluminum, Total | .479 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Aluminum, Total | .73 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Aluminum, Total | .218 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Iron, Total | .949 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Iron, Total | 1.12 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Iron, Total | .379 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Nitrite Plus Nitrate (as N) | .211 | mg/L | Influent | Qualifying Storm Event | A4500NE | 1104282 | |
| Apr 06, 2020 | Nitrite Plus Nitrate (as N) | .104 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1104282 | |
| Apr 06, 2020 | Nitrite Plus Nitrate (as N) | .092 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1104282 | |
| Apr 06, 2020 | Oil and Grease | ND | mg/L | Influent | Qualifying Storm Event | E1664A | 1104282 | |
| Apr 06, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1104282 | |
| Apr 06, 2020 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1104282 | |
| Apr 06, 2020 | pH | 6 | SU | Influent | Qualifying Storm Event | pH_Paper | 1104282 | |
| Apr 06, 2020 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1104282 | |
| Apr 06, 2020 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1104282 | |
| Apr 06, 2020 | Total Suspended Solids (TSS) | 12 | mg/L | Influent | Qualifying Storm Event | A2540D | 1104282 | |
| Apr 06, 2020 | Total Suspended Solids (TSS) | 18 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1104282 | |
| Apr 06, 2020 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1104282 | |
| Apr 06, 2020 | Zinc, Total | .128 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Zinc, Total | .209 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Apr 06, 2020 | Zinc, Total | .041 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1104282 | |
| Mar 12, 2020 | Aluminum, Total | .335 | mg/L | Influent | Qualifying Storm Event | E200.7 | 1103762 |
Results are shown exactly as reported by the discharger. Identical rows repeated in the State's export are shown once. Where the export contains different versions of the same sample and parameter, each version is listed and flagged. Details.
Compliance and enforcement records Evidence: SMARTS record
These are records as the State Water Board publishes them in SMARTS, with the source's own types and statuses. They are not a compliance determination or rating. A record listed here is not proof of a violation beyond what the source states, and the absence of records does not establish compliance.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 8 | 8 Violation · 0 Potential (preliminary) · 0 Dismissed | Dec 22, 2008 – Oct 03, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 5 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 10, 2009 – Oct 03, 2024 | Oct 21, 2026 | All actions |
| Inspections | 4 | inspections, not findings | Oct 24, 2013 – Sep 26, 2018 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2015 – 2024 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 0 | reports, by parameter | — | Oct 21, 2026 |
Each record type is counted by its own SMARTS identifier. A violation and the enforcement action that cites it are two records in two lists; they are never added together.
Chronological record history (27 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Oct 15, 2024 | Annual reports | 1294115 | Annual report 2024 | — | |
| Oct 08, 2024 | Annual reports | 1243196 | Annual report 2023 | — | |
| Oct 03, 2024 | Enforcement actions | 454917 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Oct 03, 2024 | Violations | 890552 | Late Report | Violation | Report |
| Jun 28, 2023 | Annual reports | 1189196 | Annual report 2022 | — | |
| Jul 14, 2022 | Annual reports | 1112564 | Annual report 2021 | — | |
| Jul 12, 2021 | Annual reports | 1068568 | Annual report 2020 | — | |
| Jul 07, 2020 | Annual reports | 985819 | Annual report 2019 | — | |
| Jul 10, 2019 | Annual reports | 953370 | Annual report 2018 | — | |
| Mar 27, 2019 | Annual reports | 938786 | Annual report 2017 | — | |
| Nov 16, 2018 | Enforcement actions | 431819 | NOV (Notice of Violation) | Historical | |
| Sep 26, 2018 | Inspections | 2040138 | B Type compliance | — | Additional Info Required |
| Sep 26, 2018 | Violations | 868897 | Deficient BMP Implementation | Violation | Inspection |
| Jul 09, 2018 | Annual reports | 878015 | Annual report 2016 | — | |
| Nov 21, 2017 | Enforcement actions | 427901 | NOV (Notice of Violation) | Historical | |
| Jun 01, 2017 | Inspections | 2034109 | B Type compliance | — | No Further Action |
| Jun 01, 2017 | Violations | 864951 | Deficient BMP Implementation | Violation | Inspection |
| Jun 01, 2017 | Violations | 864952 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Jul 13, 2016 | Annual reports | 841196 | Annual report 2015 | — | |
| Mar 20, 2014 | Inspections | 2022179 | Enforcement Follow-up | — | Additional Info Required |
| Jan 13, 2014 | Enforcement actions | 414657 | NOV (Notice of Violation) | Historical | |
| Oct 24, 2013 | Inspections | 2020709 | B Type compliance | — | Follow-up Inspection Needed |
| Oct 24, 2013 | Violations | 853162 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Oct 24, 2013 | Violations | 853163 | Deficient BMP Implementation | Violation | Inspection |
| Oct 24, 2013 | Violations | 853164 | Deficient Report | Violation | Inspection |
Sources and provenance
| Information | Source | Retrieved or published |
|---|---|---|
| Permit, location, receiving-water text | SMARTS Industrial Application Specific Data | Oct 20, 2026 |
| Permit history | SMARTS Storm Water Applications | Oct 20, 2026 |
| Monitoring results | SMARTS Industrial Parameter Data | Oct 20, 2026 |
| Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12) | USGS | 2026-10-22 |
| 2026 California Integrated Report, Appendix A: 2026 303(d) List (final) | SWRCB | 2026-10-22 |
| Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0) | SWRCB GIS | 2026-10-22 |
| SMARTS TMDL requirements | SMARTS | 2026-10-21 |
Relationships computed 2026-10-22 with methods facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1; proximity threshold 1.0 km.
How to read the evidence labels
- Evidence: SMARTS record Evidence: facility-reported Information as published in SMARTS or reported by the discharger.
- Evidence: identification corroborated The reported receiving-water name identifies one official waterbody and the facility's location is consistent with it. It does not establish a discharge pathway.
- Evidence: candidate, awaiting review Evidence: not confirmed The reported name could match one or more official waterbodies, but no identification has been confirmed; nothing is assigned without review.
- Evidence: spatial Evidence: geographic proximity Derived from the reported location only.
- Evidence: SMARTS-reported Source records whose links to official references are not yet reviewed.
- Evidence: unavailable The information could not be loaded or is not in the sources.
Records are shown as published and are not compliance determinations. How geographic context is derived.