Valla Yard
Active WDID 4 19I028582 Santa Fe Springs, 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
- Santa Fe Springs, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- North Fork Coyote Creek via Sorensen Ave drain (as reported by the facility)
- Evidence: not confirmed 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
- 95 distinct results, 7 reporting years (2020 to 2026)
- Most recent sample Sep 06, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 5 violation records · 3 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
- 33.95917, -118.06196
- 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
- 8636 Sorensen Street, Santa Fe Springs 90670
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- La Mirada Creek HUC12 180701060602
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
- 518017
- NOI processed
- Mar 24, 2020
- Last certified
- Dec 16, 2024
- Facility size
- 28 Acres
- Impervious area
- 80 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 518017 | Industrial | Active | Mar 24, 2020 | — | Dec 16, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- North Fork Coyote Creek via Sorensen Ave drain
- Discharges directly / indirectly
- N / Y (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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
SMARTS TMDL records Evidence: SMARTS-reported
SMARTS TMDL record as reported for this facility; it is not a determination that the TMDL applies to the facility.
| TMDL | Waterbody (as reported) | Parameter | Limit | Type | Period | Due | Discharges to TMDL water |
|---|---|---|---|---|---|---|---|
| R4 - San Gabriel River Metals and Selenium TMDL | R4 - Coyote Creek and its tributary/ies | Copper, Total | .027 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| R4 - San Gabriel River Metals and Selenium TMDL | R4 - Coyote Creek and its tributary/ies | Zinc, Total | .158 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
2 records. Links between these records and specific TMDL projects or listed waterbodies have not been reviewed and are not shown.
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.
95 distinct measurements across 6 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 | 5 | 5 | 0 | Sep 06, 2026 | Sep 06, 2026 |
| 2025 | 20 | 5 | 0 | Oct 14, 2025 | Apr 12, 2026 |
| 2024 | 10 | 5 | 0 | Feb 13, 2025 | Mar 13, 2025 |
| 2023 | 10 | 5 | 0 | Feb 20, 2024 | Mar 06, 2024 |
| 2022 | 20 | 5 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2021 | 15 | 5 | 0 | Oct 26, 2021 | Mar 28, 2022 |
| 2020 | 15 | 6 | 0 | Dec 29, 2020 | Mar 11, 2021 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 20 | 11 | Dec 29, 2020 | Sep 06, 2026 | Results |
| pH | SU | 20 | 0 | Dec 29, 2020 | Sep 06, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 20 | 1 | Dec 29, 2020 | Sep 06, 2026 | Results |
| Copper, Total | mg/L | 17 | 0 | Mar 11, 2021 | Sep 06, 2026 | Results |
| Zinc, Total | mg/L | 17 | 0 | Mar 11, 2021 | Sep 06, 2026 | Results |
| Copper, Dissolved | mg/L | 1 | 0 | Mar 11, 2021 | Mar 11, 2021 | Results |
All results (95 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Sep 06, 2026 | Copper, Total | .274 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1396881 | |
| Sep 06, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1396881 | |
| Sep 06, 2026 | pH | 8.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1396881 | |
| Sep 06, 2026 | Total Suspended Solids (TSS) | 84 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1396881 | |
| Sep 06, 2026 | Zinc, Total | .992 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1396881 | |
| Apr 12, 2026 | Copper, Total | .02 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372669 | |
| Apr 12, 2026 | Oil and Grease | 1.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1372669 | |
| Apr 12, 2026 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1372669 | |
| Apr 12, 2026 | Total Suspended Solids (TSS) | 29.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372669 | |
| Apr 12, 2026 | Zinc, Total | .08 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372669 | |
| Feb 16, 2026 | Copper, Total | .022 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367499 | |
| Feb 16, 2026 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367499 | |
| Feb 16, 2026 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367499 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 23.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367499 | |
| Feb 16, 2026 | Zinc, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367499 | |
| Nov 14, 2025 | Copper, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1358993 | |
| Nov 14, 2025 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1358993 | |
| Nov 14, 2025 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358993 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 12.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1358993 | |
| Nov 14, 2025 | Zinc, Total | .34 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1358993 | |
| Oct 14, 2025 | Copper, Total | .016 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357492 | |
| Oct 14, 2025 | Oil and Grease | 4.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1357492 | |
| Oct 14, 2025 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357492 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357492 | |
| Oct 14, 2025 | Zinc, Total | .53 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357492 | |
| Mar 13, 2025 | Copper, Total | .0036 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330269 | |
| Mar 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1330269 | |
| Mar 13, 2025 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1330269 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | DNQ 2.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1330269 | |
| Mar 13, 2025 | Zinc, Total | .29 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330269 | |
| Feb 13, 2025 | Copper, Total | .01 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327014 | |
| Feb 13, 2025 | Oil and Grease | ND 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1327014 | |
| Feb 13, 2025 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1327014 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 14.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1327014 | |
| Feb 13, 2025 | Zinc, Total | .27 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327014 | |
| Mar 06, 2024 | Copper, Total | .0097 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1283206 | |
| Mar 06, 2024 | Oil and Grease | DNQ 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1283206 | |
| Mar 06, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283206 | |
| Mar 06, 2024 | Total Suspended Solids (TSS) | 8.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283206 | |
| Mar 06, 2024 | Zinc, Total | .27 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1283206 | |
| Feb 20, 2024 | Copper, Total | .0093 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1283202 | |
| Feb 20, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1283202 | |
| Feb 20, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283202 | |
| Feb 20, 2024 | Total Suspended Solids (TSS) | 11.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283202 | |
| Feb 20, 2024 | Zinc, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1283202 | |
| Feb 24, 2023 | Copper, Total | .0078 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1233237 | |
| Feb 24, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1233237 | |
| Feb 24, 2023 | pH | 7.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1233237 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 11.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1233237 | |
| Feb 24, 2023 | Zinc, Total | .29 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1233237 |
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 | 5 | 5 Violation · 0 Potential (preliminary) · 0 Dismissed | Jan 01, 2022 – Jul 25, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | May 06, 2022 – Jul 25, 2024 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 7 | certified reports (contents not shown) | 2019 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 3 | reports, by parameter | 2021-22 – 2022-23 | Oct 21, 2026 | All reports |
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 (18 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 10, 2026 | Annual reports | 1340518 | Annual report 2025 | — | |
| Jul 03, 2025 | Annual reports | 1299662 | Annual report 2024 | — | |
| Sep 20, 2024 | Water-quality-based corrective action reports | 1313364 | WQBCAR 2022-23 | — | Copper, Total, Zinc, Total |
| Aug 16, 2024 | Water-quality-based corrective action reports | 1292451 | WQBCAR 2021-22 | — | Copper, Total, Zinc, Total |
| Jul 25, 2024 | Enforcement actions | 453729 | ACL (Administrative Civil Liability) | Historical | R4-2024-0290 |
| Jul 25, 2024 | Violations | 889424 | Effluent | Violation | Report |
| Jul 07, 2024 | Annual reports | 1249027 | Annual report 2023 | — | |
| Feb 19, 2024 | Water-quality-based corrective action reports | 1276684 | WQBCAR 2021-22 | — | Copper, Total, Zinc, Total |
| Dec 20, 2023 | Enforcement actions | 452538 | ACL (Administrative Civil Liability) | Historical | R4-2023-0407 |
| Dec 20, 2023 | Violations | 887717 | Effluent | Violation | Report |
| Dec 20, 2023 | Violations | 887718 | Effluent | Violation | Report |
| Dec 20, 2023 | Violations | 887719 | Late Report | Violation | Report |
| Jul 13, 2023 | Annual reports | 1195323 | Annual report 2022 | — | |
| Jul 09, 2022 | Annual reports | 1118940 | Annual report 2021 | — | |
| May 06, 2022 | Enforcement actions | 446476 | NOV (Notice of Violation) | Historical | |
| Jan 01, 2022 | Violations | 881690 | Late Report | Violation | Report |
| Jul 15, 2021 | Annual reports | 1110507 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 1102124 | Annual report 2019 | — |
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.