Crush Master Grinding Corp
Terminated WDID 4 19NEC003547 Walnut, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- No Exposure Certification (NEC) · Permits and applications
- Location Evidence: facility-reported
- Walnut, 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 83 distinct results, 7 reporting years (2019 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 1 violation record · 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
- 34.003786, -117.849159
- Precision
- 6 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 755 Penarth Avenue, Walnut 91789
- 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
- No Exposure Certification (NEC)
- Status
- Terminated
- Operator
- Crush Master Grinding Corp
- Primary industry (SIC)
- 3714-Motor Vehicle Parts and Accessories
- Secondary SIC
- 3751-Motorcycles, Bicycles, and Parts
- Application ID
- 490518
- NOI processed
- Sep 05, 2017
- Last certified
- Jul 31, 2019
- Facility size
- 20000 SqFt
- Impervious area
- 100 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 490518 | Industrial | Terminated | Sep 05, 2017 | — | Jul 31, 2019 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Diamond Bar Channel
- 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 |
|---|---|---|---|
| San Jose Creek Reach 1 (SG Confluence to Temple St.) CAR4053100019980918090950 | 994 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.
83 distinct measurements across 5 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 | 20 | 5 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 15 | 5 | 0 | Feb 07, 2025 | Jun 03, 2025 |
| 2023 | 13 | 5 | 0 | Aug 21, 2023 | Feb 01, 2024 |
| 2022 | 8 | 4 | 0 | Nov 02, 2022 | Dec 12, 2022 |
| 2021 | 8 | 4 | 0 | Oct 25, 2021 | Dec 09, 2021 |
| 2020 | 4 | 4 | 0 | Jan 29, 2021 | Jan 29, 2021 |
| 2019 | 15 | 4 | 0 | Nov 20, 2019 | Apr 06, 2020 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 19 | 2 | Nov 20, 2019 | Feb 16, 2026 | Results |
| Oil and Grease | mg/L | 19 | 19 | Nov 20, 2019 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 19 | 1 | Nov 20, 2019 | Feb 16, 2026 | Results |
| pH | SU | 18 | 0 | Nov 20, 2019 | Feb 16, 2026 | Results |
| Aluminum, Total | mg/L | 8 | 3 | Feb 01, 2024 | Feb 16, 2026 | Results |
All results (83 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367843 | |
| Feb 16, 2026 | Iron, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367843 | |
| Feb 16, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1367843 | |
| Feb 16, 2026 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367843 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367843 | |
| Nov 20, 2025 | Aluminum, Total | .444 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1358302 | |
| Nov 20, 2025 | Iron, Total | .793 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1358302 | |
| Nov 20, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1358302 | |
| Nov 20, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1358302 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1358302 | |
| Nov 14, 2025 | Aluminum, Total | .576 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1374390 | |
| Nov 14, 2025 | Iron, Total | .827 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1374390 | |
| Nov 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1374390 | |
| Nov 14, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374390 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1374390 | |
| Oct 14, 2025 | Aluminum, Total | .114 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356925 | |
| Oct 14, 2025 | Iron, Total | .307 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1356925 | |
| Oct 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1356925 | |
| Oct 14, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1356925 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1356925 | |
| Jun 03, 2025 | Aluminum, Total | .302 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332131 | |
| Jun 03, 2025 | Iron, Total | .388 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332131 | |
| Jun 03, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1332131 | |
| Jun 03, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1332131 | |
| Jun 03, 2025 | Total Suspended Solids (TSS) | 34 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1332131 | |
| Apr 26, 2025 | Aluminum, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332127 | |
| Apr 26, 2025 | Iron, Total | .136 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1332127 | |
| Apr 26, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1332127 | |
| Apr 26, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1332127 | |
| Apr 26, 2025 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1332127 | |
| Feb 07, 2025 | Aluminum, Total | .148 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1320964 | |
| Feb 07, 2025 | Iron, Total | .297 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1320964 | |
| Feb 07, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1320964 | |
| Feb 07, 2025 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1320964 | |
| Feb 07, 2025 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1320964 | |
| Feb 01, 2024 | Aluminum, Total | DNQ .076 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1288240 | |
| Feb 01, 2024 | Iron, Total | .261 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1288240 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1288240 | |
| Feb 01, 2024 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1288240 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1288240 | |
| Jan 03, 2024 | Iron, Total | DNQ .067 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1273819 | |
| Jan 03, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1273819 | |
| Jan 03, 2024 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1273819 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1273819 | |
| Aug 21, 2023 | Iron, Total | .123 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1265436 | |
| Aug 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1265436 | |
| Aug 21, 2023 | pH | 6.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 1265436 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1265436 | |
| Dec 12, 2022 | Iron, Total | .37 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1226258 | |
| Dec 12, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1226258 |
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 | 1 | 1 Violation · 0 Potential (preliminary) · 0 Dismissed | Apr 16, 2019 – Apr 16, 2019 | Oct 21, 2026 | All violations |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Apr 16, 2019 – Apr 16, 2019 | Oct 21, 2026 | All inspections |
| Annual reports | 7 | certified reports (contents not shown) | 2019 – 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 (9 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 01, 2026 | Annual reports | 1339689 | Annual report 2025 | — | |
| Jun 24, 2025 | Annual reports | 1298762 | Annual report 2024 | — | |
| Jul 02, 2024 | Annual reports | 1248061 | Annual report 2023 | — | |
| Jul 11, 2023 | Annual reports | 1194294 | Annual report 2022 | — | |
| Jul 14, 2022 | Annual reports | 1118223 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1110279 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 1076967 | Annual report 2019 | — | |
| Apr 16, 2019 | Inspections | 2042629 | NEC | — | Additional Info Required |
| Apr 16, 2019 | Violations | 870163 | Failure to meet NEC criteria | 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.