Shamrock Materials Inc
Terminated WDID 2 21I011081 San Rafael, Marin County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- San Rafael, Marin 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
- 34 distinct results, 1 reporting year (2015 to 2015)
- Most recent sample Jan 22, 2016 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 4 inspections · 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
- 37.96523, -122.51864
- Precision
- 5 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
- 548 Du Bois St, San Rafael 94901
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Angel Island-Frontal San Francisco Bay Estuaries HUC12 180500021001
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
- Shamrock Materials
- Primary industry (SIC)
- 3273-Ready-Mixed Concrete
- Application ID
- 182148
- NOI processed
- Aug 04, 1994
- Termination effective
- Aug 27, 2018
- Last certified
- Aug 26, 2016
- Facility size
- 3.16 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 182148 | Industrial | Terminated | Aug 04, 1994 | Aug 27, 2018 | Aug 26, 2016 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- San Rafael Canal
- 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 Rafael Creek CAR2032001220000413114045 | 357 m | listed | 1 |
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.
34 distinct measurements across 4 parameters, most recent sample Jan 22, 2016.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2015 | 34 | 4 | 0 | Dec 03, 2015 | Jan 22, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 9 | 0 | Dec 03, 2015 | Jan 22, 2016 | Results |
| pH | SU | 9 | 0 | Dec 03, 2015 | Jan 22, 2016 | Results |
| Total Suspended Solids (TSS) | mg/L | 9 | 0 | Dec 03, 2015 | Jan 22, 2016 | Results |
| Oil and Grease | mg/L | 7 | 5 | Dec 03, 2015 | Jan 22, 2016 | Results |
All results (34 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Jan 22, 2016 | Iron, Total | 4.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 22, 2016 | Iron, Total | 1.2 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 22, 2016 | Iron, Total | 5.1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 22, 2016 | Oil and Grease | 3.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Jan 22, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Jan 22, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Jan 22, 2016 | pH | 7.34 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 22, 2016 | pH | 7.12 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 22, 2016 | pH | 8.85 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 22, 2016 | Total Suspended Solids (TSS) | 86 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Jan 22, 2016 | Total Suspended Solids (TSS) | 30 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Jan 22, 2016 | Total Suspended Solids (TSS) | 110 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Jan 13, 2016 | Iron, Total | 3.5 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 13, 2016 | Iron, Total | 8.8 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 13, 2016 | Iron, Total | 2.5 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Jan 13, 2016 | Oil and Grease | 2.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Jan 13, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Jan 13, 2016 | pH | 6.92 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 13, 2016 | pH | 7.81 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 13, 2016 | pH | 8.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Jan 13, 2016 | Total Suspended Solids (TSS) | 36 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Jan 13, 2016 | Total Suspended Solids (TSS) | 200 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Jan 13, 2016 | Total Suspended Solids (TSS) | 57 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Dec 03, 2015 | Iron, Total | 11 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Dec 03, 2015 | Iron, Total | 16 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Dec 03, 2015 | Iron, Total | 2.9 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 869841 | |
| Dec 03, 2015 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Dec 03, 2015 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869841 | |
| Dec 03, 2015 | pH | 7.59 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Dec 03, 2015 | pH | 7.7 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Dec 03, 2015 | pH | 9.26 | SU | Effluent | Qualifying Storm Event | A4500HB | 869841 | |
| Dec 03, 2015 | Total Suspended Solids (TSS) | 48 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Dec 03, 2015 | Total Suspended Solids (TSS) | 120 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 | |
| Dec 03, 2015 | Total Suspended Solids (TSS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869841 |
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 | May 07, 2012 – May 07, 2012 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | May 11, 2012 – May 11, 2012 | Oct 21, 2026 | All actions |
| Inspections | 4 | inspections, not findings | May 07, 2012 – Jan 16, 2019 | Oct 21, 2026 | All inspections |
| Annual reports | 3 | certified reports (contents not shown) | 2015 – 2017 | 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 |
|---|---|---|---|---|---|
| Jan 16, 2019 | Inspections | 2041133 | Inspection from Vehicle | — | No Further Action |
| Aug 27, 2018 | Annual reports | 941339 | Annual report 2017 | — | |
| Jul 11, 2017 | Annual reports | 880717 | Annual report 2016 | — | |
| Jul 06, 2016 | Annual reports | 841756 | Annual report 2015 | — | |
| Mar 27, 2013 | Inspections | 2019002 | B Type compliance | — | Follow-up Inspection Needed |
| May 23, 2012 | Inspections | 2015490 | Enforcement Follow-up | — | No Further Action |
| May 11, 2012 | Enforcement actions | 408660 | NOV (Notice of Violation) | Historical | |
| May 07, 2012 | Inspections | 2015298 | B Type compliance | — | Follow-up Inspection Needed |
| May 07, 2012 | Violations | 847867 | Deficient BMP Implementation | 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.