Cal Sierra Transfer Station
Active WDID 5S55I014753 Sonora, 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
- Sonora, Tuolumne County
- Region 5S · Central Valley (Sacramento) · Location · Statewide map
- Receiving water
- Curtis Creek (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
- 1 waterbody; 0 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 328 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Apr 02, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 8 inspections · 10 violation records · 8 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
- 37.972901, -120.319487
- 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
- 19309 Industrial Dr, Sonora 95370
- Regional Water Board
- 5S — Central Valley (Sacramento)
HUC12 watershed Evidence: spatial
- Curtis Creek HUC12 180400091101
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
- Cal Sierra Disposal
- Primary industry (SIC)
- 4212-Local Trucking Without Storage
- Application ID
- 202798
- NOI processed
- Nov 17, 1998
- Last certified
- Nov 19, 2024
- Facility size
- 3 Acres
- Impervious area
- 66 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 202798 | Industrial | Active | Nov 17, 1998 | — | Nov 19, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Curtis Creek
- Discharges directly / indirectly
- N / — (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
2 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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Curtis Creek unnamed tributary (Tuolumne County) CAR5363102020101214114836 | 349 m | not listed | 0 |
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.
328 distinct measurements across 8 parameters, most recent sample Apr 02, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 32 | 8 | 0 | Oct 14, 2025 | Apr 02, 2026 |
| 2024 | 40 | 8 | 0 | Nov 15, 2024 | Feb 06, 2025 |
| 2023 | 32 | 8 | 0 | Nov 18, 2023 | Feb 13, 2024 |
| 2022 | 40 | 8 | 0 | Nov 08, 2022 | Feb 24, 2023 |
| 2021 | 40 | 8 | 0 | Nov 09, 2021 | Mar 28, 2022 |
| 2020 | 28 | 4 | 0 | Nov 18, 2020 | Mar 19, 2021 |
| 2019 | 20 | 4 | 0 | Nov 27, 2019 | Jan 16, 2020 |
| 2018 | 16 | 4 | 0 | Nov 28, 2018 | Feb 02, 2019 |
| 2017 | 36 | 4 | 0 | Nov 09, 2017 | Apr 16, 2018 |
| 2016 | 28 | 4 | 0 | Oct 28, 2016 | Mar 05, 2017 |
| 2015 | 16 | 4 | 0 | Oct 01, 2015 | Jan 13, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 59 | 0 | Oct 01, 2015 | Apr 02, 2026 | Results |
| Oil and Grease | mg/L | 59 | 30 | Oct 01, 2015 | Apr 02, 2026 | Results |
| pH | SU | 59 | 0 | Oct 01, 2015 | Apr 02, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 59 | 0 | Oct 01, 2015 | Apr 02, 2026 | Results |
| Chemical Oxygen Demand (COD) | mg/L | 23 | 3 | Nov 09, 2021 | Apr 02, 2026 | Results |
| Copper, Total | mg/L | 23 | 0 | Nov 09, 2021 | Apr 02, 2026 | Results |
| Lead, Total | mg/L | 23 | 1 | Nov 09, 2021 | Apr 02, 2026 | Results |
| Zinc, Total | mg/L | 23 | 0 | Nov 09, 2021 | Apr 02, 2026 | Results |
All results (328 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 02, 2026 | Chemical Oxygen Demand (COD) | 44 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1371665 | |
| Apr 02, 2026 | Copper, Total | .00993 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1371665 | |
| Apr 02, 2026 | Iron, Total | .59 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1371665 | |
| Apr 02, 2026 | Lead, Total | .00264 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1371665 | |
| Apr 02, 2026 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1371665 | |
| Apr 02, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1371665 | |
| Apr 02, 2026 | Total Suspended Solids (TSS) | 4.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1371665 | |
| Apr 02, 2026 | Zinc, Total | .065 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1371665 | |
| Feb 16, 2026 | Chemical Oxygen Demand (COD) | 190 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1369279 | |
| Feb 16, 2026 | Copper, Total | .0126 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369279 | |
| Feb 16, 2026 | Iron, Total | 3.9 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1369279 | |
| Feb 16, 2026 | Lead, Total | .00727 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369279 | |
| Feb 16, 2026 | Oil and Grease | 3.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1369279 | |
| Feb 16, 2026 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1369279 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 60 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1369279 | |
| Feb 16, 2026 | Zinc, Total | .079 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1369279 | |
| Nov 05, 2025 | Chemical Oxygen Demand (COD) | 84 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1357133 | |
| Nov 05, 2025 | Copper, Total | .0123 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357133 | |
| Nov 05, 2025 | Iron, Total | 1.9 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1357133 | |
| Nov 05, 2025 | Lead, Total | .00683 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357133 | |
| Nov 05, 2025 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1357133 | |
| Nov 05, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1357133 | |
| Nov 05, 2025 | Total Suspended Solids (TSS) | 55 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1357133 | |
| Nov 05, 2025 | Zinc, Total | .1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1357133 | |
| Oct 14, 2025 | Chemical Oxygen Demand (COD) | 27 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1354577 | |
| Oct 14, 2025 | Copper, Total | .0177 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1354577 | |
| Oct 14, 2025 | Iron, Total | 2.8 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1354577 | |
| Oct 14, 2025 | Lead, Total | .0111 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1354577 | |
| Oct 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1354577 | |
| Oct 14, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1354577 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 44 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1354577 | |
| Oct 14, 2025 | Zinc, Total | .11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1354577 | |
| Feb 06, 2025 | Chemical Oxygen Demand (COD) | 43 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1322346 | |
| Feb 06, 2025 | Copper, Total | .0245 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322346 | |
| Feb 06, 2025 | Iron, Total | 7.6 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1322346 | |
| Feb 06, 2025 | Lead, Total | .014 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322346 | |
| Feb 06, 2025 | Oil and Grease | 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1322346 | |
| Feb 06, 2025 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1322346 | |
| Feb 06, 2025 | Total Suspended Solids (TSS) | 110 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322346 | |
| Feb 06, 2025 | Zinc, Total | .138 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322346 | |
| Feb 01, 2025 | Chemical Oxygen Demand (COD) | 79 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1322162 | |
| Feb 01, 2025 | Copper, Total | .0102 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322162 | |
| Feb 01, 2025 | Iron, Total | .73 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1322162 | |
| Feb 01, 2025 | Lead, Total | .0024 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322162 | |
| Feb 01, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1322162 | |
| Feb 01, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1322162 | |
| Feb 01, 2025 | Total Suspended Solids (TSS) | 63 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322162 | |
| Feb 01, 2025 | Zinc, Total | .102 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1322162 | |
| Jan 03, 2025 | Chemical Oxygen Demand (COD) | 48 | mg/L | Effluent | Qualifying Storm Event | A5220D | 1319469 | |
| Jan 03, 2025 | Copper, Total | .0183 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1319469 |
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 | 10 | 10 Violation · 0 Potential (preliminary) · 0 Dismissed | Mar 27, 2000 – Jul 01, 2014 | Oct 21, 2026 | All violations |
| Enforcement actions | 8 | 8 issued · 0 draft · 0 withdrawn, rescinded or superseded | Mar 27, 2000 – Dec 10, 2014 | Oct 21, 2026 | All actions |
| Inspections | 8 | inspections, not findings | Sep 08, 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 (37 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 14, 2026 | Annual reports | 1334651 | Annual report 2025 | — | |
| Jul 01, 2025 | Annual reports | 1293441 | Annual report 2024 | — | |
| Jul 04, 2024 | Annual reports | 1242472 | Annual report 2023 | — | |
| Jul 05, 2023 | Annual reports | 1188438 | Annual report 2022 | — | |
| Jul 01, 2022 | Annual reports | 1111741 | Annual report 2021 | — | |
| Jun 29, 2021 | Annual reports | 1067708 | Annual report 2020 | — | |
| Jan 27, 2021 | Inspections | 2050257 | B Type compliance | Performed | Additional Info Required |
| Jul 07, 2020 | Annual reports | 984901 | Annual report 2019 | — | |
| Jul 12, 2019 | Annual reports | 952417 | Annual report 2018 | — | |
| Jul 06, 2018 | Annual reports | 937830 | Annual report 2017 | — | |
| Mar 08, 2018 | Inspections | 2037305 | B Type compliance | — | No Further Action |
| Jul 13, 2017 | Annual reports | 877020 | Annual report 2016 | — | |
| Dec 08, 2016 | Inspections | 2032269 | B Type compliance | — | No Further Action |
| Nov 18, 2016 | Annual reports | 847778 | Annual report 2015 | — | |
| Dec 10, 2014 | Enforcement actions | 417236 | 13267 Letter/Order (Water Code section 13267 letter or order) | Active | |
| Jul 01, 2014 | Violations | 855485 | Deficient BMP Implementation | Violation | Report |
| Jul 01, 2013 | Violations | 855486 | Deficient BMP Implementation | Violation | Report |
| Oct 16, 2012 | Inspections | 2017704 | B Type compliance | — | No Further Action |
| Jul 01, 2012 | Violations | 855487 | Deficient BMP Implementation | Violation | Report |
| Apr 13, 2012 | Enforcement actions | 408578 | 13267 Letter/Order (Water Code section 13267 letter or order) | Historical | |
| Sep 21, 2011 | Inspections | 2012865 | B Type compliance | — | Follow-up Inspection Needed |
| Jun 21, 2011 | Violations | 847769 | Deficient BMP Implementation | Violation | Report |
| Feb 15, 2011 | Inspections | 2010671 | B Type compliance | — | Follow-up Inspection Needed |
| Nov 19, 2010 | Inspections | 2009452 | B Type compliance | — | Follow-up Inspection Needed |
| Oct 14, 2010 | Enforcement actions | 403019 | SEL (Staff Enforcement Letter) | Historical |
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.