Sentinel Peak Resources California LLC
Active WDID 4 19I027143 Montebello, Los Angeles County Region 4 · Los Angeles
Watershed, receiving-water, nearby-water and TMDL information is temporarily unavailable. Permit and monitoring records below are complete.
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Montebello, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Rio Hondo (as reported by the facility)
- Evidence: identification unavailable 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
- Evidence: unavailable
- Monitoring results Evidence: facility-reported
- 114 distinct results, 8 reporting years (2017 to 2025)
- Most recent sample Feb 16, 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
34.028249, -118.080862
Coordinates as reported in the permit application; not a discharge point.
- Facility address
- 1050 N Lincoln Ave, Montebello 90640
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
Unavailable.
Permits and applications Evidence: SMARTS record
Current permit record
- Permit type
- Industrial
- Application type
- Notice of Intent (WDID code I)
- Status
- Active
- Operator
- Sentinel Peak Resources California LLC
- Primary industry (SIC)
- 1311-Crude Petroleum and Natural Gas
- Application ID
- 483074
- NOI processed
- Apr 19, 2017
- Last certified
- Jun 07, 2022
- Facility size
- 488 Acres
- Impervious area
- 5 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 483074 | Industrial | Active | Apr 19, 2017 | — | Jun 07, 2022 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Rio Hondo
Evidence: unavailable Match status unavailable.
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.
Evidence: unavailable Unavailable.
SMARTS TMDL records Evidence: SMARTS-reported
Evidence: unavailable Unavailable.
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.
114 distinct measurements across 16 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 18 | 3 | 0 | Nov 14, 2025 | Feb 16, 2026 |
| 2024 | 6 | 3 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 9 | 3 | 0 | Jan 03, 2024 | Feb 05, 2024 |
| 2022 | 9 | 3 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2021 | 3 | 3 | 0 | Mar 28, 2022 | Mar 28, 2022 |
| 2019 | 36 | 16 | 0 | Dec 04, 2019 | Apr 07, 2020 |
| 2018 | 18 | 3 | 0 | Jan 14, 2019 | Feb 05, 2019 |
| 2017 | 15 | 3 | 0 | Jan 09, 2018 | Mar 22, 2018 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 29 | 22 | Jan 09, 2018 | Feb 16, 2026 | Results |
| pH | SU | 29 | 0 | Jan 09, 2018 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 29 | 1 | Jan 09, 2018 | Feb 16, 2026 | Results |
| Ammonia, Total (as N) | mg/L | 3 | 3 | Dec 04, 2019 | Apr 07, 2020 | Results |
| Bis (2-Ethylhexyl) Phthalate | ug/L | 3 | 3 | Dec 04, 2019 | Apr 07, 2020 | Results |
| Cyanide, Total (as CN) | mg/L | 3 | 3 | Dec 04, 2019 | Apr 07, 2020 | Results |
| Dissolved Oxygen | mg/L | 3 | 0 | Dec 04, 2019 | Apr 07, 2020 | Results |
| Copper, Total | mg/L | 2 | 0 | Dec 04, 2019 | Dec 04, 2019 | Results |
| Lead, Total | mg/L | 2 | 0 | Dec 04, 2019 | Dec 04, 2019 | Results |
| Zinc, Total | mg/L | 2 | 0 | Dec 04, 2019 | Dec 04, 2019 | Results |
| Copper, Total | ug/L | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| E.coli | MPN/100 mL | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
Show 7 more parameters
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Enterococci MPN | MPN/100 mL | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Fecal Coliform | MPN/100 mL | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Hardness, Total (as CaCO3) | mg/L | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Lead, Total | ug/L | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Total Coliform | MPN/100 mL | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Turbidity | NTU | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
| Zinc, Total | ug/L | 1 | 0 | Apr 07, 2020 | Apr 07, 2020 | Results |
All results (114 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Oil and Grease | DNQ .9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1372436 | |
| Feb 16, 2026 | Oil and Grease | .2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1372436 | |
| Feb 16, 2026 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1372436 | |
| Feb 16, 2026 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1372436 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 62.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372436 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372436 | |
| Nov 21, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1361004 | |
| Nov 21, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1361004 | |
| Nov 21, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361004 | |
| Nov 21, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361004 | |
| Nov 21, 2025 | Total Suspended Solids (TSS) | 90 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361004 | |
| Nov 21, 2025 | Total Suspended Solids (TSS) | 98.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361004 | |
| Nov 14, 2025 | Oil and Grease | DNQ 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1360992 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1360992 | |
| Nov 14, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1360992 | |
| Nov 14, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1360992 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 101 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360992 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 410 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360992 | |
| Feb 13, 2025 | Oil and Grease | 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324943 | |
| Feb 13, 2025 | Oil and Grease | 1.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1324943 | |
| Feb 13, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1324943 | |
| Feb 13, 2025 | pH | 6.25 | SU | Effluent | Qualifying Storm Event | pH_Field | 1324943 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 252 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324943 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 82.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1324943 | |
| Feb 05, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1283426 | |
| Feb 05, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283426 | |
| Feb 05, 2024 | Total Suspended Solids (TSS) | 71.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1283426 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1276469 | |
| Jan 22, 2024 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1276469 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 103 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1276469 | |
| Jan 03, 2024 | Oil and Grease | 3.3 | mg/L | Effluent | Qualifying Storm Event | 1276470 | ||
| Jan 03, 2024 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | 1276470 | ||
| Jan 03, 2024 | Total Suspended Solids (TSS) | 310 | mg/L | Effluent | Qualifying Storm Event | 1276470 | ||
| Feb 24, 2023 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1230965 | |
| Feb 24, 2023 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1230965 | |
| Feb 24, 2023 | Total Suspended Solids (TSS) | 135 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1230965 | |
| Jan 10, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1226039 | |
| Jan 10, 2023 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1226039 | |
| Jan 10, 2023 | Total Suspended Solids (TSS) | 38.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1226039 | |
| Nov 08, 2022 | Oil and Grease | 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1219235 | |
| Nov 08, 2022 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1219235 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 198 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1219235 | |
| Mar 28, 2022 | Oil and Grease | DNQ 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1180334 | |
| Mar 28, 2022 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1180334 | |
| Mar 28, 2022 | Total Suspended Solids (TSS) | 474 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1180334 | |
| Apr 07, 2020 | Ammonia, Total (as N) | < .5 | mg/L | Effluent | Qualifying Storm Event | A4500NHC | 1106710 | |
| Apr 07, 2020 | Bis (2-Ethylhexyl) Phthalate | < 5 | ug/L | Effluent | Qualifying Storm Event | E625 | 1106710 | |
| Apr 07, 2020 | Copper, Total | 9.1 | ug/L | Effluent | Qualifying Storm Event | E200.8 | 1106710 | |
| Apr 07, 2020 | Cyanide, Total (as CN) | < .005 | mg/L | Effluent | Qualifying Storm Event | A4500CE | 1106710 | |
| Apr 07, 2020 | Dissolved Oxygen | 6.77 | mg/L | Effluent | Qualifying Storm Event | A4500OG | 1106710 |
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 | Jan 11, 2022 – Jan 11, 2022 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2016 – 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 (11 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 10, 2026 | Annual reports | 1339254 | Annual report 2025 | — | |
| Jul 12, 2025 | Annual reports | 1298298 | Annual report 2024 | — | |
| Jul 13, 2024 | Annual reports | 1247580 | Annual report 2023 | — | |
| Jul 12, 2023 | Annual reports | 1193785 | Annual report 2022 | — | |
| Jul 13, 2022 | Annual reports | 1117655 | Annual report 2021 | — | |
| Jan 11, 2022 | Inspections | 2055117 | B Type compliance | Finalized | No Further Action |
| Jul 14, 2021 | Annual reports | 1065886 | Annual report 2020 | — | |
| Jul 13, 2020 | Annual reports | 983003 | Annual report 2019 | — | |
| Jul 15, 2019 | Annual reports | 959366 | Annual report 2018 | — | |
| Jul 16, 2018 | Annual reports | 944801 | Annual report 2017 | — | |
| Jul 06, 2017 | Annual reports | 931541 | Annual report 2016 | — |
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 |
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.