Petrochem Materials Innovation LLC
Active WDID 4 19I024998 South Gate, 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
- South Gate, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Los Angeles River (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
- 208 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Feb 17, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 0 violation records · 0 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
- 33.96165, -118.19326
- 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
- 4242 Santa Ana Street, South Gate 90280
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Chavez Ravine-Los Angeles River HUC12 180701050401
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
- Petrochem Materials Innovation LLC
- Primary industry (SIC)
- 2951-Asphalt Paving Mixtures and Blocks
- Application ID
- 448593
- NOI processed
- Aug 07, 2014
- Last certified
- Sep 30, 2020
- 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 |
|---|---|---|---|---|---|
| 448593 | Industrial | Active | Aug 07, 2014 | — | Sep 30, 2020 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Los Angeles River
- 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
7 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
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 |
|---|---|---|---|---|---|---|---|
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Copper, Total | .06749 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Lead, Total | .094 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Metals TMDL | Los Angeles River and Los Angeles River Tributaries | Zinc, Total | .159 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
3 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.
208 distinct measurements across 6 parameters, most recent sample Feb 17, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 18 | 6 | 0 | Nov 15, 2025 | Feb 17, 2026 |
| 2024 | 12 | 6 | 0 | Feb 13, 2025 | Mar 13, 2025 |
| 2023 | 12 | 6 | 0 | Feb 01, 2024 | Feb 20, 2024 |
| 2022 | 30 | 6 | 0 | Nov 08, 2022 | Mar 21, 2023 |
| 2021 | 6 | 6 | 0 | Dec 14, 2021 | Dec 14, 2021 |
| 2020 | 24 | 6 | 0 | Jan 29, 2021 | Mar 15, 2021 |
| 2019 | 24 | 6 | 0 | Nov 27, 2019 | Apr 13, 2020 |
| 2018 | 30 | 6 | 0 | Nov 29, 2018 | Feb 13, 2019 |
| 2017 | 18 | 6 | 0 | Jan 09, 2018 | Mar 22, 2018 |
| 2016 | 24 | 6 | 0 | Oct 17, 2016 | Jan 20, 2017 |
| 2015 | 10 | 6 | 0 | Sep 15, 2015 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Copper, Total | mg/L | 35 | 8 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Lead, Total | mg/L | 35 | 26 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Oil and Grease | mg/L | 35 | 30 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 35 | 2 | Sep 15, 2015 | Feb 17, 2026 | Results |
| pH | SU | 34 | 0 | Sep 15, 2015 | Feb 17, 2026 | Results |
| Zinc, Total | mg/L | 34 | 1 | Jan 05, 2016 | Feb 17, 2026 | Results |
Copper, Total results (35 distinct rows, show all)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Copper, Total | .0041 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1368345 | |
| Nov 21, 2025 | Copper, Total | DNQ .0021 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1362493 | |
| Nov 15, 2025 | Copper, Total | DNQ .0018 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1359603 | |
| Mar 13, 2025 | Copper, Total | .01 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1327682 | |
| Feb 13, 2025 | Copper, Total | .016 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1324133 | |
| Feb 20, 2024 | Copper, Total | .0032 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1280641 | |
| Feb 01, 2024 | Copper, Total | DNQ .0022 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1277002 | |
| Mar 21, 2023 | Copper, Total | DNQ .0011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1233793 | |
| Feb 28, 2023 | Copper, Total | .0039 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1230032 | |
| Jan 10, 2023 | Copper, Total | DNQ .00071 | mg/L | Effluent | Qualifying Storm Event | 1224550 | ||
| Jan 05, 2023 | Copper, Total | DNQ .0019 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1224547 | |
| Nov 08, 2022 | Copper, Total | DNQ .0089 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1217555 | |
| Dec 14, 2021 | Copper, Total | .0095 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1176498 | |
| Mar 15, 2021 | Copper, Total | .011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1147881 | |
| Mar 10, 2021 | Copper, Total | .007 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1147877 | |
| Mar 03, 2021 | Copper, Total | .013 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1145684 | |
| Jan 29, 2021 | Copper, Total | .007 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1143243 | |
| Apr 13, 2020 | Copper, Total | .0048 | mg/L | Effluent | Non-Qualifying Storm Event | E200.8 | 1109023 | |
| Dec 23, 2019 | Copper, Total | DNQ .0014 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1096499 | |
| Dec 04, 2019 | Copper, Total | .0134 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1093640 | |
| Nov 27, 2019 | Copper, Total | .0271 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1092353 | |
| Feb 13, 2019 | Copper, Total | .0236 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1044650 | |
| Jan 31, 2019 | Copper, Total | .00731 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1040918 | |
| Jan 14, 2019 | Copper, Total | .0057 | mg/L | Effluent | Non-Qualifying Storm Event | E200.8 | 1036564 | |
| Dec 06, 2018 | Copper, Total | .00734 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1030701 | |
| Nov 29, 2018 | Copper, Total | .016 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1029844 | |
| Mar 22, 2018 | Copper, Total | .0105 | mg/L | Effluent | Non-Qualifying Storm Event | E200.8 | 998001 | |
| Mar 03, 2018 | Copper, Total | .021 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 996324 | |
| Jan 09, 2018 | Copper, Total | .0191 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 993460 | |
| Jan 20, 2017 | Copper, Total | .00732 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 932610 | |
| Jan 12, 2017 | Copper, Total | .00531 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 932609 | |
| Jan 09, 2017 | Copper, Total | .00442 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 932608 | |
| Oct 17, 2016 | Copper, Total | .0202 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 929488 | |
| Jan 05, 2016 | Copper, Total | .0027 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 870656 | |
| Sep 15, 2015 | Copper, Total | .0012 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 856552 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Apr 04, 2024 – Apr 04, 2024 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2015 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 1 | reports, by parameter | 2020-21 – 2020-21 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 15, 2026 | Annual reports | 1339186 | Annual report 2025 | — | |
| Jun 04, 2025 | Annual reports | 1298222 | Annual report 2024 | — | |
| Jun 26, 2024 | Annual reports | 1247496 | Annual report 2023 | — | |
| Apr 04, 2024 | Inspections | 2063985 | B Type compliance | Performed | Additional Info Required |
| Jul 10, 2023 | Annual reports | 1193697 | Annual report 2022 | — | |
| Aug 17, 2022 | Water-quality-based corrective action reports | 1203253 | WQBCAR 2020-21 | — | Zinc, Total |
| Jul 11, 2022 | Annual reports | 1117548 | Annual report 2021 | — | |
| Jun 18, 2021 | Annual reports | 1065773 | Annual report 2020 | — | |
| Jul 02, 2020 | Annual reports | 982891 | Annual report 2019 | — | |
| Jul 02, 2019 | Annual reports | 959247 | Annual report 2018 | — | |
| Jul 12, 2018 | Annual reports | 944683 | Annual report 2017 | — | |
| Dec 21, 2016 | Annual reports | 839553 | Annual report 2015 | — |
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.