Dolores Yard
Active WDID 4 19I013943 Long Beach, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Long Beach, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Dominguez Channel (as reported by the facility)
- Evidence: candidate, awaiting review Details
- 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
- None
- Monitoring results Evidence: facility-reported
- 209 distinct results, 12 reporting years (2015 to 2026)
- Most recent sample Sep 06, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 9 violation records · 9 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
- 33.83147, -118.22868
- 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
- 2442 Carson, Long Beach 90810
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Lower Dominguez Channel HUC12 180701060102
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
- Active
- Operator
- Union Pacific Railroad
- Primary industry (SIC)
- 4011-Railroads, Line-haul Operating
- Application ID
- 190629
- NOI processed
- Apr 30, 1998
- Last certified
- Dec 16, 2024
- Facility size
- 4 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 190629 | Industrial | Active | Apr 30, 1998 | — | Dec 16, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Dominguez Channel
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Why it is not confirmed (1)
- C1 name is only a prefix of official names
2 official waterbodies share this name; none is assigned without review.
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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
209 distinct measurements across 4 parameters, most recent sample Sep 06, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2026 | 3 | 3 | 0 | Sep 06, 2026 | Sep 06, 2026 |
| 2025 | 17 | 3 | 0 | Oct 15, 2025 | Apr 12, 2026 |
| 2024 | 9 | 3 | 0 | Jan 26, 2025 | Mar 13, 2025 |
| 2023 | 14 | 3 | 0 | Aug 21, 2023 | Jan 22, 2024 |
| 2022 | 24 | 3 | 0 | Nov 08, 2022 | Jan 16, 2023 |
| 2021 | 9 | 3 | 0 | Dec 14, 2021 | Mar 28, 2022 |
| 2020 | 31 | 4 | 0 | Dec 29, 2020 | Mar 12, 2021 |
| 2019 | 30 | 3 | 0 | Dec 04, 2019 | Apr 09, 2020 |
| 2018 | 15 | 3 | 0 | Nov 30, 2018 | Feb 01, 2019 |
| 2017 | 18 | 3 | 0 | Jan 10, 2018 | Mar 22, 2018 |
| 2016 | 24 | 3 | 0 | Nov 21, 2016 | Feb 20, 2017 |
| 2015 | 15 | 3 | 0 | Dec 15, 2015 | Feb 01, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Total Suspended Solids (TSS) | mg/L | 69 | 4 | Dec 15, 2015 | Sep 06, 2026 | Results |
| Oil and Grease | mg/L | 68 | 52 | Dec 15, 2015 | Sep 06, 2026 | Results |
| pH | SU | 68 | 0 | Dec 15, 2015 | Sep 06, 2026 | Results |
| Cadmium, Total | mg/L | 4 | 0 | Dec 29, 2020 | Dec 29, 2020 | Results |
All results (209 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Sep 06, 2026 | Oil and Grease | DNQ 1.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1396873 | |
| Sep 06, 2026 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1396873 | |
| Sep 06, 2026 | Total Suspended Solids (TSS) | 256 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1396873 | |
| Apr 12, 2026 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1371566 | |
| Apr 12, 2026 | Total Suspended Solids (TSS) | 113 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371566 | |
| Feb 16, 2026 | Oil and Grease | 1.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367544 | |
| Feb 16, 2026 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367544 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 195 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367544 | |
| Jan 05, 2026 | Oil and Grease | < 1.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1363837 | |
| Jan 05, 2026 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363837 | |
| Jan 05, 2026 | Total Suspended Solids (TSS) | 62.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363837 | |
| Jan 02, 2026 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1363837 | |
| Jan 02, 2026 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1363837 | |
| Jan 02, 2026 | Total Suspended Solids (TSS) | 266 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1363837 | |
| Nov 15, 2025 | Oil and Grease | < 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1358839 | |
| Nov 15, 2025 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358839 | |
| Nov 15, 2025 | Total Suspended Solids (TSS) | 88.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1358839 | |
| Oct 15, 2025 | Oil and Grease | < 1.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1357426 | |
| Oct 15, 2025 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357426 | |
| Oct 15, 2025 | Total Suspended Solids (TSS) | 37.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357426 | |
| Mar 13, 2025 | Oil and Grease | DNQ 2.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1330262 | |
| Mar 13, 2025 | pH | 8.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1330262 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 287 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1330262 | |
| Feb 06, 2025 | Oil and Grease | DNQ 1.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1325645 | |
| Feb 06, 2025 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1325645 | |
| Feb 06, 2025 | Total Suspended Solids (TSS) | 120 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1325645 | |
| Jan 26, 2025 | Oil and Grease | DNQ 2.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322765 | |
| Jan 26, 2025 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322765 | |
| Jan 26, 2025 | Total Suspended Solids (TSS) | 121 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322765 | |
| Jan 22, 2024 | Oil and Grease | DNQ 3.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1278801 | |
| Jan 22, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278801 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 904 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278801 | |
| Jan 03, 2024 | Oil and Grease | DNQ 2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1275643 | |
| Jan 03, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1275643 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 111 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1275643 | |
| Dec 21, 2023 | Oil and Grease | 6.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1274632 | |
| Dec 21, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274632 | |
| Dec 21, 2023 | Total Suspended Solids (TSS) | 121 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1274632 | |
| Nov 15, 2023 | Oil and Grease | DNQ 3.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1269945 | |
| Nov 15, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1269945 | |
| Nov 15, 2023 | Total Suspended Solids (TSS) | 168 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1269945 | |
| Aug 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1267115 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 141 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1267115 | |
| Jan 16, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1224120 | |
| Jan 16, 2023 | Oil and Grease | DNQ 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1224120 | |
| Jan 16, 2023 | pH | 7.91 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224120 | |
| Jan 16, 2023 | pH | 7.42 | SU | Effluent | Qualifying Storm Event | pH_Field | 1224120 | |
| Jan 16, 2023 | Total Suspended Solids (TSS) | 16.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1224120 | |
| Jan 16, 2023 | Total Suspended Solids (TSS) | 162 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1224120 | |
| Jan 10, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1224118 |
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 | 9 | 9 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 1999 – Apr 09, 2021 | Oct 21, 2026 | All violations |
| Enforcement actions | 9 | 7 issued · 0 draft · 2 withdrawn, rescinded or superseded | Apr 02, 2002 – Apr 09, 2021 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Apr 02, 2002 – Dec 20, 2002 | Oct 21, 2026 | All inspections |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 2025 | 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 (31 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Apr 02, 2002 | Enforcement actions | 241886 | NTC (Notice to Comply) | Historical | Field NTC |
| Apr 02, 2002 | Inspections | 1737145 | B Type compliance | — | Additional Info Required |
| Apr 02, 2002 | Violations | 204589 | Deficient BMP Implementation | Violation | Inspection |
| Apr 02, 2002 | Violations | 204592 | Deficient BMP Implementation | Violation | Inspection |
| Jul 07, 2000 | Violations | 205113 | Failure to Pay Enforcement Fee | Violation | Inspection |
| Jul 02, 1999 | Violations | 157279 | 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.