Soils Plus
Active WDID 2 49I016029 Sonoma, Sonoma 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
- Sonoma, Sonoma 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
- None
- Monitoring results Evidence: facility-reported
- 588 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample May 11, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 0 violation records · 0 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
- 38.254497, -122.478779
- Precision
- 6 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
- 4343 Stage Gulch Road, Sonoma 95476
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Fowler Creek HUC12 180500020302
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
- Soiland Co Inc
- Primary industry (SIC)
- 1429-Crushed and Broken Stone, NEC
- Application ID
- 184892
- NOI processed
- Aug 15, 2000
- Last certified
- Jun 08, 2015
- Facility size
- 50 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 184892 | Industrial | Active | Aug 15, 2000 | — | Jun 08, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Champlin Creek
- 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.
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.
588 distinct measurements across 12 parameters, most recent sample May 11, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 29 | 9 | 0 | Dec 22, 2025 | May 11, 2026 |
| 2024 | 72 | 9 | 0 | Nov 13, 2024 | Apr 11, 2025 |
| 2023 | 102 | 11 | 0 | Nov 27, 2023 | Apr 03, 2024 |
| 2022 | 37 | 9 | 0 | Nov 15, 2022 | Mar 08, 2023 |
| 2021 | 36 | 9 | 0 | Nov 09, 2021 | Apr 22, 2022 |
| 2020 | 36 | 9 | 0 | Dec 29, 2020 | Mar 18, 2021 |
| 2019 | 45 | 9 | 0 | Nov 27, 2019 | Apr 06, 2020 |
| 2018 | 71 | 9 | 0 | Oct 02, 2018 | Feb 08, 2019 |
| 2017 | 45 | 9 | 0 | Nov 16, 2017 | Mar 21, 2018 |
| 2016 | 90 | 9 | 0 | Oct 25, 2016 | Mar 24, 2017 |
| 2015 | 25 | 10 | 0 | Dec 23, 2015 | Feb 17, 2017 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 69 | 14 | Jan 13, 2016 | Feb 17, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 68 | 14 | Jan 13, 2016 | May 11, 2026 | Results |
| pH | SU | 64 | 0 | Dec 23, 2015 | May 11, 2026 | Results |
| Oil and Grease | mg/L | 63 | 39 | Dec 23, 2015 | Feb 17, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 63 | 10 | Dec 23, 2015 | Feb 17, 2026 | Results |
| Iron, Total | mg/L | 61 | 16 | Jan 13, 2016 | Feb 17, 2026 | Results |
| Lead, Total | mg/L | 61 | 40 | Jan 13, 2016 | Feb 17, 2026 | Results |
| Zinc, Total | mg/L | 61 | 36 | Jan 13, 2016 | Feb 17, 2026 | Results |
| Chemical Oxygen Demand (COD) | mg/L | 60 | 9 | Oct 25, 2016 | Feb 17, 2026 | Results |
| Copper, Total | mg/L | 8 | 8 | Nov 27, 2023 | Feb 17, 2024 | Results |
| Gasoline | mg/L | 8 | 8 | Nov 27, 2023 | Feb 17, 2024 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 2 | 0 | Dec 23, 2015 | Jan 05, 2016 | Results |
All results (588 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| May 11, 2026 | Nitrite Plus Nitrate (as N) | DNQ .094 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1373611 | |
| May 11, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373611 | |
| Feb 17, 2026 | Aluminum, Total | DNQ .018 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367751 | |
| Feb 17, 2026 | Chemical Oxygen Demand (COD) | 26 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1367751 | |
| Feb 17, 2026 | Iron, Total | DNQ .064 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1367751 | |
| Feb 17, 2026 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367751 | |
| Feb 17, 2026 | Nitrite Plus Nitrate (as N) | DNQ .043 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1367751 | |
| Feb 17, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1367751 | |
| Feb 17, 2026 | pH | 6.75 | SU | Effluent | Qualifying Storm Event | pH_Field | 1367751 | |
| Feb 17, 2026 | Total Suspended Solids (TSS) | 2.8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1367751 | |
| Feb 17, 2026 | Zinc, Total | DNQ .0061 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1367751 | |
| Feb 12, 2026 | Aluminum, Total | DNQ .011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1366473 | |
| Feb 12, 2026 | Chemical Oxygen Demand (COD) | 39 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1366473 | |
| Feb 12, 2026 | Iron, Total | .14 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1366473 | |
| Feb 12, 2026 | Lead, Total | DNQ .000039 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1366473 | |
| Feb 12, 2026 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1366473 | |
| Feb 12, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5520B | 1366473 | |
| Feb 12, 2026 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1366473 | |
| Feb 12, 2026 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1366473 | |
| Feb 12, 2026 | Zinc, Total | DNQ .0074 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1366473 | |
| Dec 22, 2025 | Aluminum, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364039 | |
| Dec 22, 2025 | Chemical Oxygen Demand (COD) | 11 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1364039 | |
| Dec 22, 2025 | Iron, Total | .16 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1364039 | |
| Dec 22, 2025 | Lead, Total | DNQ .000044 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364039 | |
| Dec 22, 2025 | Nitrite Plus Nitrate (as N) | DNQ .029 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1364039 | |
| Dec 22, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | A5520B | 1364039 | |
| Dec 22, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1364039 | |
| Dec 22, 2025 | Total Suspended Solids (TSS) | 2.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364039 | |
| Dec 22, 2025 | Zinc, Total | DNQ .013 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1364039 | |
| Apr 11, 2025 | Aluminum, Total | .13 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Apr 11, 2025 | Aluminum, Total | .12 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Apr 11, 2025 | Chemical Oxygen Demand (COD) | DNQ 20 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1330421 | |
| Apr 11, 2025 | Chemical Oxygen Demand (COD) | DNQ 24 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1330421 | |
| Apr 11, 2025 | Iron, Total | DNQ .04 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1330421 | |
| Apr 11, 2025 | Iron, Total | DNQ .04 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1330421 | |
| Apr 11, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Apr 11, 2025 | Lead, Total | ND | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Apr 11, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1330421 | |
| Apr 11, 2025 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | A4500F | 1330421 | |
| Apr 11, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1330421 | |
| Apr 11, 2025 | Oil and Grease | DNQ 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1330421 | |
| Apr 11, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1330421 | |
| Apr 11, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1330421 | |
| Apr 11, 2025 | Total Suspended Solids (TSS) | 1.1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1330421 | |
| Apr 11, 2025 | Total Suspended Solids (TSS) | 1.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1330421 | |
| Apr 11, 2025 | Zinc, Total | DNQ .004 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Apr 11, 2025 | Zinc, Total | DNQ .003 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1330421 | |
| Mar 17, 2025 | Aluminum, Total | .18 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326798 | |
| Mar 17, 2025 | Aluminum, Total | .19 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1326798 | |
| Mar 17, 2025 | Chemical Oxygen Demand (COD) | 7.6 | mg/L | Effluent | Qualifying Storm Event | E410.4 | 1326798 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | Jan 11, 2011 – Jan 11, 2011 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1336340 | Annual report 2025 | — | |
| Jul 10, 2025 | Annual reports | 1295202 | Annual report 2024 | — | |
| Jul 11, 2024 | Annual reports | 1244334 | Annual report 2023 | — | |
| Jul 12, 2023 | Annual reports | 1190384 | Annual report 2022 | — | |
| Jul 05, 2022 | Annual reports | 1113861 | Annual report 2021 | — | |
| Jul 12, 2021 | Annual reports | 1069925 | Annual report 2020 | — | |
| Jul 08, 2020 | Annual reports | 987278 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 954883 | Annual report 2018 | — | |
| Jul 11, 2018 | Annual reports | 940301 | Annual report 2017 | — | |
| Jul 14, 2017 | Annual reports | 879622 | Annual report 2016 | — | |
| Jul 15, 2016 | Annual reports | 840500 | Annual report 2015 | — | |
| Jan 11, 2011 | Inspections | 2010445 | B Type compliance | — | Follow-up Inspection Needed |
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.