Thornton Technology
Terminated WDID 9 37NEC006629 Oceanside, San Diego County Region 9 · San Diego
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- No Exposure Certification (NEC) · Permits and applications
- Location Evidence: facility-reported
- Oceanside, San Diego County
- Region 9 · San Diego · Location · Statewide map
- Receiving water
- Loma Alta Creek (as reported by the facility)
- Evidence: identification corroborated Loma Alta Creek Details
- Identified receiving water on the 2026 303(d) list
- Yes · 10 Appendix A decisions, category 5 Evidence: State-published
- Describes the waterbody, not this facility · Waterbody profile
- 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
- None in the current exports
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 2 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
- 33.21606, -117.26881
- 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
- 2608 Temple Heights Dr, Oceanside 92056
- Regional Water Board
- 9 — San Diego
HUC12 watershed Evidence: spatial
- Loma Alta Creek-Frontal Gulf of Santa Catalina HUC12 180703030504
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
- Thornton Technology
- Primary industry (SIC)
- 3728-Aircraft Parts and Auxiliary Equipment, NEC
- Application ID
- 517620
- NOI processed
- May 05, 2020
- Termination effective
- Oct 07, 2026
- Last certified
- Sep 26, 2023
- Facility size
- 28800 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 517620 | Industrial | Terminated | May 05, 2020 | Oct 07, 2026 | Sep 26, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Loma Alta Creek
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: identification corroborated Loma Alta Creek CAR9041000019991117145300
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 289 m. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Loma Alta Creek is on the 2026 Clean Water Act section 303(d) list (10 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Benthic Community Effects | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 126444 |
| Bifenthrin | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 111533 |
| Cyfluthrin | 5 | List on 303(d) list (TMDL required list) | 5A | 111539 |
| Cyhalothrin, Lambda | 5 | List on 303(d) list (TMDL required list) | 5A | 111541 |
| Indicator Bacteria | 5 | List on 303(d) list (TMDL required list) | 5A | 127885 |
| Nitrogen | 5 | List on 303(d) list (TMDL required list) | 5A | 132041 |
| Phosphorus | 5 | List on 303(d) list (TMDL required list) | 5A | 111526 |
| Pyrethroids | 5 | List on 303(d) list (TMDL required list) | 5A | 111532 |
| Selenium | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 111527 |
| Toxicity | 5 | Do Not Delist from 303(d) list (TMDL required list) | 5A | 111529 |
Published by the State Water Resources Control Board (2026 California Integrated Report, Appendix A). Listing status is taken from Appendix A only. State Board adoption 2026-02-03; USEPA approval not confirmed. A listing describes the waterbody, not this facility. Waterbody profile.
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 |
|---|---|---|---|
| Loma Alta Creek CAR9041000019991117145300 | 289 m | listed | 10 |
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.
No industrial monitoring results for this permit are in the current exports.
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 | 2 | 2 Violation · 0 Potential (preliminary) · 0 Dismissed | Oct 02, 2021 – Oct 02, 2025 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Oct 18, 2021 – Oct 17, 2025 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | May 15, 2023 – May 15, 2023 | Oct 21, 2026 | All inspections |
| Annual reports | 0 | certified reports (contents not shown) | — | Oct 21, 2026 | |
| 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 (6 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Oct 17, 2025 | Enforcement actions | 467235 | NOV (Notice of Violation) | Active | |
| Oct 02, 2025 | Violations | 901751 | Failure to meet NEC criteria | Violation | Report |
| May 15, 2023 | Inspections | 2060240 | NEC | Finalized | No Further Action |
| Jan 03, 2022 | Enforcement actions | 445027 | NOV (Notice of Violation) | Historical | |
| Oct 18, 2021 | Enforcement actions | 442840 | NOV (Notice of Violation) | Historical | |
| Oct 02, 2021 | Violations | 878947 | Failure to meet NEC criteria | Violation | Internal 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.