Portola Minerals Company dba Blue Mountain Minerals
Active WDID 5S55I004132 Columbia, Tuolumne County Region 5S · Central Valley (Sacramento)
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Columbia, Tuolumne County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- Receiving water
- Stanislaus 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
- None
- Monitoring results Evidence: facility-reported
- 45 distinct results, 6 reporting years (2015 to 2024)
- Most recent sample Feb 13, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 2 inspections · 3 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
- 38.057, -120.4179
- Precision
- 3 decimal places low precision
- Shared point
- No
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 24599 Marble Quarry Road, Columbia 95310
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Mormon Creek-Stanislaus River HUC12 180400100605
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
- Blue Mountain Minerals
- Primary industry (SIC)
- 1422-Crushed and Broken Limestone
- Application ID
- 202787
- NOI processed
- Apr 06, 1992
- Last certified
- Jul 08, 2026
- Facility size
- 230 Acres
- Impervious area
- 95 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 202787 | Industrial | Active | Apr 06, 1992 | — | Jul 08, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Stanislaus 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
5 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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
45 distinct measurements across 3 parameters, most recent sample Feb 13, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2024 | 3 | 3 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2022 | 3 | 3 | 0 | Feb 27, 2023 | Feb 27, 2023 |
| 2018 | 6 | 3 | 0 | Feb 20, 2019 | Feb 20, 2019 |
| 2017 | 6 | 3 | 0 | Dec 20, 2017 | Jan 22, 2018 |
| 2016 | 24 | 3 | 0 | Jan 08, 2017 | Mar 21, 2017 |
| 2015 | 3 | 3 | 0 | Mar 11, 2016 | Mar 11, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 15 | 10 | Mar 11, 2016 | Feb 13, 2025 | Results |
| pH | SU | 15 | 0 | Mar 11, 2016 | Feb 13, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 15 | 1 | Mar 11, 2016 | Feb 13, 2025 | Results |
All results (45 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 13, 2025 | Oil and Grease | 3.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1325227 | |
| Feb 13, 2025 | pH | 8.21 | SU | Effluent | Qualifying Storm Event | pH_Field | 1325227 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 21 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1325227 | |
| Feb 27, 2023 | Oil and Grease | 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1233035 | |
| Feb 27, 2023 | pH | 7.95 | SU | Effluent | Qualifying Storm Event | pH_Field | 1233035 | |
| Feb 27, 2023 | Total Suspended Solids (TSS) | < 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1233035 | |
| Feb 20, 2019 | Oil and Grease | 0 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1061998 | |
| Feb 20, 2019 | Oil and Grease | 0 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1061998 | |
| Feb 20, 2019 | pH | 8.05 | SU | Effluent | Qualifying Storm Event | pH_Field | 1061998 | |
| Feb 20, 2019 | pH | 8.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1061998 | |
| Feb 20, 2019 | Total Suspended Solids (TSS) | 1.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1061998 | |
| Feb 20, 2019 | Total Suspended Solids (TSS) | 4.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1061998 | |
| Jan 22, 2018 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 993578 | |
| Jan 22, 2018 | pH | 8.33 | SU | Effluent | Qualifying Storm Event | pH_Field | 993578 | |
| Jan 22, 2018 | Total Suspended Solids (TSS) | 38 | mg/L | Effluent | Qualifying Storm Event | A2540D | 993578 | |
| Dec 20, 2017 | Oil and Grease | 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 990516 | |
| Dec 20, 2017 | pH | 8.21 | SU | Effluent | Qualifying Storm Event | pH_Field | 990516 | |
| Dec 20, 2017 | Total Suspended Solids (TSS) | 77 | mg/L | Effluent | Qualifying Storm Event | A2540D | 990516 | |
| Mar 21, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 931681 | |
| Mar 21, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 931681 | |
| Mar 21, 2017 | pH | 8.34 | SU | Effluent | Qualifying Storm Event | pH_Field | 931681 | |
| Mar 21, 2017 | pH | 7.87 | SU | Effluent | Qualifying Storm Event | pH_Field | 931681 | |
| Mar 21, 2017 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 931681 | |
| Mar 21, 2017 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 931681 | |
| Feb 16, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 928419 | |
| Feb 16, 2017 | pH | 8.43 | SU | Effluent | Qualifying Storm Event | pH_Field | 928419 | |
| Feb 16, 2017 | Total Suspended Solids (TSS) | 25 | mg/L | Effluent | Qualifying Storm Event | A2540D | 928419 | |
| Feb 03, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 928416 | |
| Feb 03, 2017 | pH | 8.24 | SU | Effluent | Qualifying Storm Event | pH_Field | 928416 | |
| Feb 03, 2017 | Total Suspended Solids (TSS) | 31 | mg/L | Effluent | Qualifying Storm Event | A2540D | 928416 | |
| Jan 10, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 918422 | |
| Jan 10, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 918422 | |
| Jan 10, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 918422 | |
| Jan 10, 2017 | pH | 8.16 | SU | Effluent | Qualifying Storm Event | pH_Field | 918422 | |
| Jan 10, 2017 | pH | 8.01 | SU | Effluent | Qualifying Storm Event | pH_Field | 918422 | |
| Jan 10, 2017 | pH | 8.11 | SU | Effluent | Qualifying Storm Event | pH_Field | 918422 | |
| Jan 10, 2017 | Total Suspended Solids (TSS) | 316 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918422 | |
| Jan 10, 2017 | Total Suspended Solids (TSS) | 46 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918422 | |
| Jan 10, 2017 | Total Suspended Solids (TSS) | 79 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918422 | |
| Jan 08, 2017 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 918422 | |
| Jan 08, 2017 | pH | 7.52 | SU | Effluent | Qualifying Storm Event | pH_Field | 918422 | |
| Jan 08, 2017 | Total Suspended Solids (TSS) | 111 | mg/L | Effluent | Qualifying Storm Event | A2540D | 918422 | |
| Mar 11, 2016 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 869352 | |
| Mar 11, 2016 | pH | 8.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 869352 | |
| Mar 11, 2016 | Total Suspended Solids (TSS) | 29 | mg/L | Effluent | Qualifying Storm Event | A2540D | 869352 |
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 | 3 | 3 Violation · 0 Potential (preliminary) · 0 Dismissed | Nov 10, 1999 – Oct 14, 2010 | Oct 21, 2026 | All violations |
| Enforcement actions | 3 | 3 issued · 0 draft · 0 withdrawn, rescinded or superseded | Dec 09, 1999 – Oct 14, 2010 | Oct 21, 2026 | All actions |
| Inspections | 2 | inspections, not findings | Oct 06, 2010 – Jan 27, 2021 | Oct 21, 2026 | All inspections |
| 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 (19 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 15, 2026 | Annual reports | 1334648 | Annual report 2025 | — | |
| Jul 15, 2025 | Annual reports | 1293438 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1242469 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1188435 | Annual report 2022 | — | |
| Jul 12, 2022 | Annual reports | 1111738 | Annual report 2021 | — | |
| Jul 13, 2021 | Annual reports | 1067705 | Annual report 2020 | — | |
| Jan 27, 2021 | Inspections | 2050345 | B Type compliance | Performed | No Further Action |
| Jul 15, 2020 | Annual reports | 984898 | Annual report 2019 | — | |
| Jun 24, 2019 | Annual reports | 952414 | Annual report 2018 | — | |
| Jun 27, 2018 | Annual reports | 937827 | Annual report 2017 | — | |
| Jun 27, 2017 | Annual reports | 877017 | Annual report 2016 | — | |
| Jun 07, 2016 | Annual reports | 847766 | Annual report 2015 | — | |
| Oct 14, 2010 | Enforcement actions | 403021 | SEL (Staff Enforcement Letter) | Historical | |
| Oct 14, 2010 | Violations | 842774 | Deficient BMP Implementation | Violation | Report |
| Oct 06, 2010 | Inspections | 2008853 | B Type compliance | — | No Further Action |
| May 10, 2000 | Enforcement actions | 232459 | NTC (Notice to Comply) | Historical | UNKNOWN |
| May 10, 2000 | Violations | 173360 | Deficient BMP Implementation | Violation | Inspection |
| Dec 09, 1999 | Enforcement actions | 232336 | SEL (Staff Enforcement Letter) | Historical | UNKNOWN |
| Nov 10, 1999 | Violations | 172643 | 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.