Tempco Engineering
Terminated WDID 4 19I025840 Sun Valley, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Sun Valley, 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 363 distinct results, 8 reporting years (2016 to 2023)
- Most recent sample Feb 01, 2024 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 11 violation records · 4 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
- 34.23036, -118.40147
- 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
- 8866 Laurel Canyon Boulevard, Sun Valley 91352
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Tujunga Wash-Los Angeles River HUC12 180701050208
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
- Terminated
- Operator
- Tempco Engineering
- Primary industry (SIC)
- 3499-Fabricated Metal Products, NEC
- Secondary SIC
- 3728-Aircraft Parts and Auxiliary Equipment, NEC
- Application ID
- 457288
- NOI processed
- Jul 17, 2015
- Termination effective
- Mar 31, 2025
- Last certified
- Jan 03, 2025
- Facility size
- 1.19 Acres
- Impervious area
- 98 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 457288 | Industrial | Terminated | Jul 17, 2015 | Mar 31, 2025 | Jan 03, 2025 |
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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Tujunga Wash (LA River to Hansen Dam) CAR4052100019990202134750 | 756 m | listed | 4 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
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 | Zinc, Total | .159 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrate, Total (as N) | 8 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite Plus Nitrate (as N) | 8 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Angeles River Nitrogen TMDL | Los Angeles River Watershed | Nitrite, Total (as N) | 1 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
4 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.
363 distinct measurements across 12 parameters, most recent sample Feb 01, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 9 | 9 | 0 | Feb 01, 2024 | Feb 01, 2024 |
| 2022 | 92 | 9 | 0 | Dec 27, 2022 | Mar 21, 2023 |
| 2021 | 54 | 9 | 0 | Oct 25, 2021 | Mar 28, 2022 |
| 2020 | 36 | 9 | 0 | Mar 10, 2021 | Mar 15, 2021 |
| 2019 | 28 | 7 | 0 | Dec 04, 2019 | Mar 10, 2020 |
| 2018 | 42 | 7 | 0 | Dec 06, 2018 | Mar 02, 2019 |
| 2017 | 42 | 7 | 0 | Jan 09, 2018 | Mar 22, 2018 |
| 2016 | 60 | 6 | 0 | Nov 21, 2016 | Feb 07, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 49 | 31 | Nov 21, 2016 | Feb 01, 2024 | Results |
| pH | SU | 49 | 0 | Nov 21, 2016 | Feb 01, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 49 | 0 | Nov 21, 2016 | Feb 01, 2024 | Results |
| Iron, Total Recoverable | mg/L | 39 | 0 | Jan 09, 2018 | Feb 01, 2024 | Results |
| Aluminum, Total Recoverable | mg/L | 37 | 0 | Jan 09, 2018 | Feb 01, 2024 | Results |
| Zinc, Total Recoverable | mg/L | 37 | 0 | Jan 09, 2018 | Feb 01, 2024 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 35 | 0 | Jan 09, 2018 | Feb 01, 2024 | Results |
| Nitrate, Total (as N) | mg/L | 19 | 0 | Mar 10, 2021 | Feb 01, 2024 | Results |
| Nitrite, Total (as N) | mg/L | 19 | 5 | Mar 10, 2021 | Feb 01, 2024 | Results |
| Aluminum, Total | mg/L | 10 | 0 | Nov 21, 2016 | Feb 07, 2017 | Results |
| Iron, Total | mg/L | 10 | 0 | Nov 21, 2016 | Feb 07, 2017 | Results |
| Zinc, Total | mg/L | 10 | 0 | Nov 21, 2016 | Feb 07, 2017 | Results |
All results (363 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 01, 2024 | Aluminum, Total Recoverable | .16 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1281241 | |
| Feb 01, 2024 | Iron, Total Recoverable | .16 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1281241 | |
| Feb 01, 2024 | Nitrate, Total (as N) | .14 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1281241 | |
| Feb 01, 2024 | Nitrite Plus Nitrate (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1281241 | |
| Feb 01, 2024 | Nitrite, Total (as N) | .062 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1281241 | |
| Feb 01, 2024 | Oil and Grease | ND 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1281241 | |
| Feb 01, 2024 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1281241 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1281241 | |
| Feb 01, 2024 | Zinc, Total Recoverable | .075 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1281241 | |
| Mar 21, 2023 | Iron, Total Recoverable | .91 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1234336 | |
| Mar 21, 2023 | Iron, Total Recoverable | .82 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1234336 | |
| Mar 21, 2023 | Oil and Grease | ND 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1234336 | |
| Mar 21, 2023 | Oil and Grease | 4.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1234336 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234336 | |
| Mar 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234336 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | 34 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234336 | |
| Mar 21, 2023 | Total Suspended Solids (TSS) | 46 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234336 | |
| Mar 14, 2023 | Aluminum, Total Recoverable | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1234335 | |
| Mar 14, 2023 | Aluminum, Total Recoverable | .21 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1234335 | |
| Mar 14, 2023 | Iron, Total Recoverable | .15 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1234335 | |
| Mar 14, 2023 | Iron, Total Recoverable | 1.3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1234335 | |
| Mar 14, 2023 | Nitrate, Total (as N) | .11 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Nitrate, Total (as N) | .38 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Nitrite Plus Nitrate (as N) | .16 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Nitrite Plus Nitrate (as N) | .44 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Nitrite, Total (as N) | .045 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Nitrite, Total (as N) | .061 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1234335 | |
| Mar 14, 2023 | Oil and Grease | 4.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1234335 | |
| Mar 14, 2023 | Oil and Grease | 5.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1234335 | |
| Mar 14, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234335 | |
| Mar 14, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1234335 | |
| Mar 14, 2023 | Total Suspended Solids (TSS) | 1.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234335 | |
| Mar 14, 2023 | Total Suspended Solids (TSS) | 8.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1234335 | |
| Mar 14, 2023 | Zinc, Total Recoverable | .066 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1234335 | |
| Mar 14, 2023 | Zinc, Total Recoverable | .093 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1234335 | |
| Mar 10, 2023 | Aluminum, Total Recoverable | .36 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1233025 | |
| Mar 10, 2023 | Aluminum, Total Recoverable | .1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1233025 | |
| Mar 10, 2023 | Iron, Total Recoverable | .41 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1233025 | |
| Mar 10, 2023 | Iron, Total Recoverable | .12 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1233025 | |
| Mar 10, 2023 | Nitrate, Total (as N) | .099 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Nitrate, Total (as N) | .2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Nitrite Plus Nitrate (as N) | .15 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Nitrite Plus Nitrate (as N) | .25 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Nitrite, Total (as N) | .05 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Nitrite, Total (as N) | .046 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1233025 | |
| Mar 10, 2023 | Oil and Grease | ND 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1233025 | |
| Mar 10, 2023 | Oil and Grease | 3.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1233025 | |
| Mar 10, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1233025 | |
| Mar 10, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1233025 | |
| Mar 10, 2023 | Total Suspended Solids (TSS) | 8.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1233025 |
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 | 11 | 11 Violation · 0 Potential (preliminary) · 0 Dismissed | Apr 18, 2018 – May 02, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 4 | 4 issued · 0 draft · 0 withdrawn, rescinded or superseded | Apr 18, 2018 – Dec 16, 2025 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Apr 18, 2025 – Apr 18, 2025 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | certified reports (contents not shown) | 2015 – 2024 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 1 | reports, by parameter | 2023-24 – 2023-24 | 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 (27 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Dec 16, 2025 | Enforcement actions | 468137 | EPL (Expedited Payment Letter) | Active | R4-2025-0074 |
| Apr 18, 2025 | Inspections | 2067683 | NOT | Finalized | No Further Action |
| Mar 26, 2025 | Annual reports | 1297426 | Annual report 2024 | — | |
| Jul 09, 2024 | Annual reports | 1246664 | Annual report 2023 | — | |
| May 09, 2024 | Water-quality-based corrective action reports | 1278370 | WQBCAR 2023-24 | — | Zinc, Total |
| May 02, 2024 | Enforcement actions | 453504 | ACL (Administrative Civil Liability) | Historical | R4-2024-0120 |
| May 02, 2024 | Violations | 889193 | Late Report | Violation | Report |
| Nov 03, 2023 | Annual reports | 1192825 | Annual report 2022 | — | |
| Oct 18, 2023 | Enforcement actions | 451146 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Oct 18, 2023 | Violations | 886216 | Late Report | Violation | Report |
| May 12, 2023 | Violations | 902667 | Late Report | Violation | Report |
| May 07, 2023 | Violations | 902668 | Late Report | Violation | Report |
| Mar 27, 2023 | Violations | 902669 | Late Report | Violation | Report |
| Feb 28, 2023 | Violations | 902670 | Late Report | Violation | Report |
| Feb 28, 2023 | Violations | 902671 | Late Report | Violation | Report |
| Jul 15, 2022 | Annual reports | 1116564 | Annual report 2021 | — | |
| May 21, 2022 | Violations | 902664 | Late Report | Violation | Report |
| Feb 11, 2022 | Violations | 902665 | Late Report | Violation | Report |
| Dec 16, 2021 | Violations | 902666 | Late Report | Violation | Report |
| Jul 19, 2021 | Annual reports | 1064732 | Annual report 2020 | — | |
| Jul 14, 2020 | Annual reports | 981766 | Annual report 2019 | — | |
| Jun 18, 2019 | Annual reports | 958093 | Annual report 2018 | — | |
| Jul 10, 2018 | Annual reports | 943539 | Annual report 2017 | — | |
| Apr 18, 2018 | Enforcement actions | 429656 | NOV (Notice of Violation) | Historical | |
| Apr 18, 2018 | Violations | 866788 | Incomplete/Insufficient SWPPP | Violation | Report |
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.