Western Pacific Storage Systems
Terminated WDID 4 19I026682 San Dimas, 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
- San Dimas, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Puddingstone Reservoir (as reported by the facility)
- Evidence: identification corroborated Puddingstone Reservoir Details
- Identified receiving water on the 2026 303(d) list
- Yes · 5 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
- 145 distinct results, 8 reporting years (2016 to 2023)
- Most recent sample Feb 19, 2024 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 1 violation record · 1 enforcement action
- 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
- 34.10214, -117.80166
- 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
- 300 E Arrow Hwy, San Dimas 91773
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Big Dalton Wash HUC12 180701060402
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
- Western Pacific Storage Systems
- Primary industry (SIC)
- 3499-Fabricated Metal Products, NEC
- Secondary SIC
- 3479-Coating, Engraving, and Allied Services, NEC
- Application ID
- 474827
- NOI processed
- Jul 11, 2016
- Termination effective
- Mar 12, 2025
- Last certified
- May 11, 2023
- Facility size
- 360000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 474827 | Industrial | Terminated | Jul 11, 2016 | Mar 12, 2025 | May 11, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Puddingstone Reservoir
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: identification corroborated Puddingstone Reservoir CAL4055200019980918113803
Receiving water reported by facility — waterbody identification corroborated by geographic evidence.
Nearest distance from the reported facility location: 1.1 km. Method receiving_water/2.
2026 Integrated Report status Evidence: State-published
Puddingstone Reservoir is on the 2026 Clean Water Act section 303(d) list (5 Appendix A decisions; category 5).
| Pollutant | Category | Listing decision | TMDL requirement | Decision ID |
|---|---|---|---|---|
| Chlordane | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19) | 136227 |
| DDT (Dichlorodiphenyltrichloroethane) | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19) | 150505 |
| Mercury | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19) | 149778 |
| Organic Enrichment/Low Dissolved Oxygen | 5 | List on 303(d) list (TMDL required list) | 5A | 70238 |
| PCBs (Polychlorinated biphenyls) | 5 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | 5B · Echo Lake, PeckRd Lake DDT/PCBs/Chlordane (19) | 136236 |
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 |
|---|---|---|---|
| Walnut Creek Wash (Drains from Puddingstone Res) CAR4053100019980918112433 | 388 m | listed | 4 |
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.
145 distinct measurements across 9 parameters, most recent sample Feb 19, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 16 | 9 | 0 | Jan 03, 2024 | Feb 19, 2024 |
| 2022 | 18 | 9 | 0 | Dec 30, 2022 | Mar 12, 2023 |
| 2021 | 18 | 9 | 0 | Dec 14, 2021 | Dec 29, 2021 |
| 2020 | 9 | 9 | 0 | Jan 29, 2021 | Jan 29, 2021 |
| 2019 | 20 | 7 | 0 | Dec 04, 2019 | Apr 06, 2020 |
| 2018 | 29 | 7 | 0 | Nov 29, 2018 | Mar 06, 2019 |
| 2017 | 7 | 7 | 0 | Jan 08, 2018 | Jan 08, 2018 |
| 2016 | 28 | 7 | 0 | Dec 16, 2016 | Jan 19, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Nitrite Plus Nitrate (as N) | mg/L | 20 | 0 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Aluminum, Total | mg/L | 19 | 0 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Iron, Total | mg/L | 19 | 4 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Oil and Grease | mg/L | 19 | 10 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 19 | 6 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Zinc, Total | mg/L | 19 | 0 | Dec 16, 2016 | Feb 19, 2024 | Results |
| pH | SU | 18 | 0 | Dec 16, 2016 | Feb 19, 2024 | Results |
| Nitrate, Total (as N) | mg/L | 6 | 0 | Jan 29, 2021 | Jan 03, 2024 | Results |
| Nitrite, Total (as N) | mg/L | 6 | 0 | Jan 29, 2021 | Jan 03, 2024 | Results |
pH results (18 distinct rows, show all)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 19, 2024 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1283183 | |
| Jan 03, 2024 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1276153 | |
| Mar 12, 2023 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1235462 | |
| Dec 30, 2022 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1226099 | |
| Dec 29, 2021 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1186422 | |
| Dec 14, 2021 | pH | 6.4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1186416 | |
| Jan 29, 2021 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1151664 | |
| Apr 06, 2020 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1105576 | |
| Mar 10, 2020 | pH | 6.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1107580 | |
| Mar 06, 2019 | pH | 6.8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1072071 | |
| Feb 14, 2019 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | A4500HB | 1072068 | |
| Feb 01, 2019 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1072065 | |
| Nov 29, 2018 | pH | 6.45 | SU | Effluent | Qualifying Storm Event | A4500HB | 1033680 | |
| Jan 08, 2018 | pH | 6.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1001309 | |
| Jan 19, 2017 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 927726 | |
| Jan 09, 2017 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 927726 | |
| Dec 21, 2016 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 911954 | |
| Dec 16, 2016 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Field | 911951 |
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 | Dec 06, 2023 – Dec 06, 2023 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 06, 2023 – Dec 06, 2023 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Apr 11, 2025 – Apr 11, 2025 | Oct 21, 2026 | All inspections |
| Annual reports | 9 | certified reports (contents not shown) | 2016 – 2024 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Apr 11, 2025 | Inspections | 2067577 | NOT | Finalized | No Further Action |
| Mar 10, 2025 | Annual reports | 1298508 | Annual report 2024 | — | |
| Jul 10, 2024 | Annual reports | 1247799 | Annual report 2023 | — | |
| Dec 06, 2023 | Enforcement actions | 451668 | NOV (Notice of Violation) | Historical | |
| Dec 06, 2023 | Violations | 886773 | Incomplete/Insufficient SWPPP | Violation | Report |
| Jul 11, 2023 | Annual reports | 1194016 | Annual report 2022 | — | |
| Jul 12, 2022 | Annual reports | 1117922 | Annual report 2021 | — | |
| Jul 09, 2021 | Annual reports | 1066173 | Annual report 2020 | — | |
| Jul 10, 2020 | Annual reports | 983308 | Annual report 2019 | — | |
| Jul 02, 2019 | Annual reports | 959683 | Annual report 2018 | — | |
| Jul 06, 2018 | Annual reports | 945114 | Annual report 2017 | — | |
| Jul 05, 2017 | Annual reports | 888881 | 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 |
| 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.