Olson Steel
Active WDID 2 01I022123 San Leandro, Alameda County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Leandro, Alameda County
- Region 2 · San Francisco Bay · 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
- 400 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Apr 10, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 1 violation record · 2 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
- 37.71766, -122.18145
- 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
- 1941 Davis St, San Leandro 94577
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Sausal Creek-Frontal San Francisco Bay Estuaries HUC12 180500040805
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
- Active
- Operator
- OLSON STEEL
- Primary industry (SIC)
- 3441-Fabricated Structural Metal
- Application ID
- 364283
- NOI processed
- Apr 24, 2009
- Last certified
- Jul 25, 2018
- Facility size
- 86000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 364283 | Industrial | Active | Apr 24, 2009 | — | Jul 25, 2018 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Unidentified Water
- Discharges directly / indirectly
- N / Y (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 Leandro Creek, Lower CAR2042001219990218140451 | 848 m | listed | 6 |
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.
400 distinct measurements across 7 parameters, most recent sample Apr 10, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 52 | 7 | 0 | Nov 13, 2025 | Apr 10, 2026 |
| 2024 | 28 | 7 | 0 | Jan 03, 2025 | Feb 04, 2025 |
| 2023 | 42 | 7 | 0 | Dec 20, 2023 | Jan 23, 2024 |
| 2022 | 28 | 7 | 0 | Jan 05, 2023 | Feb 03, 2023 |
| 2021 | 28 | 7 | 0 | Oct 22, 2021 | Mar 28, 2022 |
| 2020 | 28 | 7 | 0 | Jan 04, 2021 | Jan 28, 2021 |
| 2019 | 28 | 7 | 0 | Dec 18, 2019 | Jan 16, 2020 |
| 2018 | 42 | 7 | 0 | Feb 13, 2019 | May 21, 2019 |
| 2017 | 42 | 7 | 0 | Nov 16, 2017 | Feb 26, 2018 |
| 2016 | 40 | 7 | 0 | Dec 15, 2016 | Apr 12, 2017 |
| 2015 | 42 | 7 | 0 | Nov 09, 2015 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 58 | 2 | Nov 09, 2015 | Apr 10, 2026 | Results |
| Iron, Total | mg/L | 58 | 2 | Nov 09, 2015 | Apr 10, 2026 | Results |
| Oil and Grease | mg/L | 58 | 35 | Nov 09, 2015 | Apr 10, 2026 | Results |
| Zinc, Total | mg/L | 58 | 1 | Nov 09, 2015 | Apr 10, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 57 | 1 | Nov 09, 2015 | Apr 10, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 57 | 1 | Nov 09, 2015 | Apr 10, 2026 | Results |
| pH | SU | 54 | 0 | Nov 09, 2015 | Jan 05, 2026 | Results |
All results (400 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 10, 2026 | Aluminum, Total | .54 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372119 | |
| Apr 10, 2026 | Aluminum, Total | DNQ .043 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372119 | |
| Apr 10, 2026 | Iron, Total | 1.7 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372119 | |
| Apr 10, 2026 | Iron, Total | DNQ .078 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1372119 | |
| Apr 10, 2026 | Nitrite Plus Nitrate (as N) | .28 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1372119 | |
| Apr 10, 2026 | Nitrite Plus Nitrate (as N) | DNQ .068 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1372119 | |
| Apr 10, 2026 | Oil and Grease | ND 0 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1372119 | |
| Apr 10, 2026 | Oil and Grease | DNQ 1.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1372119 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 26 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372119 | |
| Apr 10, 2026 | Total Suspended Solids (TSS) | 1.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1372119 | |
| Apr 10, 2026 | Zinc, Total | DNQ .044 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372119 | |
| Apr 10, 2026 | Zinc, Total | .071 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1372119 | |
| Feb 18, 2026 | Aluminum, Total | .066 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369590 | |
| Feb 18, 2026 | Aluminum, Total | 1.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369590 | |
| Feb 18, 2026 | Iron, Total | DNQ .086 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1369590 | |
| Feb 18, 2026 | Iron, Total | 1.3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1369590 | |
| Feb 18, 2026 | Nitrite Plus Nitrate (as N) | .87 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1369590 | |
| Feb 18, 2026 | Nitrite Plus Nitrate (as N) | .69 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1369590 | |
| Feb 18, 2026 | Oil and Grease | DNQ 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369590 | |
| Feb 18, 2026 | Oil and Grease | DNQ 2.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369590 | |
| Feb 18, 2026 | Total Suspended Solids (TSS) | 1.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369590 | |
| Feb 18, 2026 | Total Suspended Solids (TSS) | 21 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369590 | |
| Feb 18, 2026 | Zinc, Total | .1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369590 | |
| Feb 18, 2026 | Zinc, Total | .25 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369590 | |
| Jan 05, 2026 | Aluminum, Total | .075 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365095 | |
| Jan 05, 2026 | Aluminum, Total | 1.6 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365095 | |
| Jan 05, 2026 | Iron, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365095 | |
| Jan 05, 2026 | Iron, Total | 2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365095 | |
| Jan 05, 2026 | Nitrite Plus Nitrate (as N) | .68 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1365095 | |
| Jan 05, 2026 | Nitrite Plus Nitrate (as N) | .77 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1365095 | |
| Jan 05, 2026 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365095 | |
| Jan 05, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365095 | |
| Jan 05, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1365095 | |
| Jan 05, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1365095 | |
| Jan 05, 2026 | Total Suspended Solids (TSS) | 3.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365095 | |
| Jan 05, 2026 | Total Suspended Solids (TSS) | 31 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365095 | |
| Jan 05, 2026 | Zinc, Total | .06 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365095 | |
| Jan 05, 2026 | Zinc, Total | .17 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365095 | |
| Nov 13, 2025 | Aluminum, Total | .076 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361957 | |
| Nov 13, 2025 | Aluminum, Total | .47 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1361957 | |
| Nov 13, 2025 | Iron, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361957 | |
| Nov 13, 2025 | Iron, Total | 1.1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1361957 | |
| Nov 13, 2025 | Nitrite Plus Nitrate (as N) | .34 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1361957 | |
| Nov 13, 2025 | Nitrite Plus Nitrate (as N) | .48 | mg/L | Effluent | Qualifying Storm Event | A4500NOH | 1361957 | |
| Nov 13, 2025 | Oil and Grease | 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361957 | |
| Nov 13, 2025 | Oil and Grease | 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1361957 | |
| Nov 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361957 | |
| Nov 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1361957 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 2.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361957 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 14 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1361957 |
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 | Jul 02, 2010 – Jul 02, 2010 | Oct 21, 2026 | All violations |
| Enforcement actions | 2 | 2 issued · 0 draft · 0 withdrawn, rescinded or superseded | Sep 30, 2010 – Sep 30, 2010 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 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 (14 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 24, 2026 | Annual reports | 1335064 | Annual report 2025 | — | |
| Jul 14, 2025 | Annual reports | 1293864 | Annual report 2024 | — | |
| Jun 13, 2024 | Annual reports | 1242934 | Annual report 2023 | — | |
| Jun 30, 2023 | Annual reports | 1188923 | Annual report 2022 | — | |
| Jun 28, 2022 | Annual reports | 1112268 | Annual report 2021 | — | |
| Jul 15, 2021 | Annual reports | 1068266 | Annual report 2020 | — | |
| Jun 24, 2020 | Annual reports | 985497 | Annual report 2019 | — | |
| Jul 01, 2019 | Annual reports | 953033 | Annual report 2018 | — | |
| Sep 20, 2018 | Annual reports | 938448 | Annual report 2017 | — | |
| Oct 03, 2017 | Annual reports | 877666 | Annual report 2016 | — | |
| Jun 20, 2016 | Annual reports | 844141 | Annual report 2015 | — | |
| Sep 30, 2010 | Enforcement actions | 402968 | NOV (Notice of Violation) | Active | |
| Sep 30, 2010 | Enforcement actions | 402969 | EPL (Expedited Payment Letter) | Historical | R2-2011-0107 |
| Jul 02, 2010 | Violations | 842719 | Late Report | 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.