LK Lehman Trucking Inc AL Ready Mix
Active WDID 5S55I021933 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
- 288 distinct results, 9 reporting years (2017 to 2025)
- Most recent sample Feb 25, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 8 inspections · 12 violation records · 16 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
- 37.97336, -120.31872
- 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
- 19333 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
- LK Lehman Trucking Inc
- Primary industry (SIC)
- 3273-Ready-Mixed Concrete
- Application ID
- 355302
- NOI processed
- Nov 21, 2008
- Last certified
- Jun 30, 2015
- Facility size
- 2 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 355302 | Industrial | Active | Nov 21, 2008 | — | Jun 30, 2015 |
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 / 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
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 | 335 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.
288 distinct measurements across 5 parameters, most recent sample Feb 25, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 32 | 4 | 0 | Oct 14, 2025 | Feb 25, 2026 |
| 2024 | 40 | 4 | 0 | Nov 11, 2024 | Feb 04, 2025 |
| 2023 | 32 | 4 | 0 | Dec 18, 2023 | Feb 15, 2024 |
| 2022 | 32 | 4 | 0 | Dec 01, 2022 | Mar 09, 2023 |
| 2021 | 32 | 4 | 0 | Nov 09, 2021 | Apr 16, 2022 |
| 2020 | 32 | 4 | 0 | Nov 18, 2020 | Mar 06, 2021 |
| 2019 | 32 | 5 | 0 | Nov 27, 2019 | Mar 23, 2020 |
| 2018 | 32 | 4 | 0 | Nov 28, 2018 | Feb 13, 2019 |
| 2017 | 24 | 5 | 0 | Nov 09, 2017 | Mar 01, 2018 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 72 | 46 | Nov 09, 2017 | Feb 25, 2026 | Results |
| pH | SU | 72 | 0 | Nov 09, 2017 | Feb 25, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 72 | 0 | Nov 09, 2017 | Feb 25, 2026 | Results |
| Iron, Total | mg/L | 64 | 1 | Nov 09, 2017 | Feb 25, 2026 | Results |
| Iron, Total Recoverable | ug/L | 8 | 0 | Jan 19, 2018 | Mar 23, 2020 | Results |
All results (288 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Dec 12, 2024 | Oil and Grease | 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1315421 | |
| Dec 12, 2024 | Oil and Grease | DNQ 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1315421 | |
| Dec 12, 2024 | pH | 10.66 | SU | Effluent | Qualifying Storm Event | pH_Field | 1315421 | |
| Dec 12, 2024 | pH | 7.79 | SU | Effluent | Qualifying Storm Event | pH_Field | 1315421 | |
| Dec 12, 2024 | Total Suspended Solids (TSS) | 722 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1315421 | |
| Dec 12, 2024 | Total Suspended Solids (TSS) | 286 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1315421 | |
| Nov 23, 2024 | Iron, Total | .315 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317384 | |
| Nov 23, 2024 | Iron, Total | .434 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317384 | |
| Nov 23, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1317384 | |
| Nov 23, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1317384 | |
| Nov 23, 2024 | pH | 9.29 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317384 | |
| Nov 23, 2024 | pH | 9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317384 | |
| Nov 23, 2024 | Total Suspended Solids (TSS) | 16 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317384 | |
| Nov 23, 2024 | Total Suspended Solids (TSS) | 22 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317384 | |
| Nov 11, 2024 | Iron, Total | 8.73 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317387 | |
| Nov 11, 2024 | Iron, Total | 3.34 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1317387 | |
| Nov 11, 2024 | Oil and Grease | 3.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1317387 | |
| Nov 11, 2024 | Oil and Grease | DNQ 1.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1317387 | |
| Nov 11, 2024 | pH | 11.28 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317387 | |
| Nov 11, 2024 | pH | 10.46 | SU | Effluent | Qualifying Storm Event | pH_Field | 1317387 | |
| Nov 11, 2024 | Total Suspended Solids (TSS) | 804 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317387 | |
| Nov 11, 2024 | Total Suspended Solids (TSS) | 208 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1317387 | |
| Feb 15, 2024 | Iron, Total | 8.79 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1278117 | |
| Feb 15, 2024 | Iron, Total | 1.76 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1278117 | |
| Feb 15, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1278117 | |
| Feb 15, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1278117 | |
| Feb 15, 2024 | pH | 8.86 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278117 | |
| Feb 15, 2024 | pH | 9.09 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278117 | |
| Feb 15, 2024 | Total Suspended Solids (TSS) | 200 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278117 | |
| Feb 15, 2024 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278117 | |
| Feb 01, 2024 | Iron, Total | 7.74 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1278117 | |
| Feb 01, 2024 | Iron, Total | 3.25 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1278117 | |
| Feb 01, 2024 | Oil and Grease | DNQ 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1278117 | |
| Feb 01, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1278117 | |
| Feb 01, 2024 | pH | 9.19 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278117 | |
| Feb 01, 2024 | pH | 9.01 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278117 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 77 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278117 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 67 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278117 | |
| Jan 03, 2024 | Iron, Total | 9.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1271746 | |
| Jan 03, 2024 | Iron, Total | 1.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1271746 | |
| Jan 03, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1271746 | |
| Jan 03, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1271746 | |
| Jan 03, 2024 | pH | 8.87 | SU | Effluent | Qualifying Storm Event | pH_Field | 1271746 | |
| Jan 03, 2024 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1271746 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 66 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1271746 | |
| Jan 03, 2024 | Total Suspended Solids (TSS) | 150 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1271746 | |
| Dec 18, 2023 | Iron, Total | 11.6 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1271744 | |
| Dec 18, 2023 | Iron, Total | 4.69 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1271744 | |
| Dec 18, 2023 | Oil and Grease | DNQ 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1271744 | |
| Dec 18, 2023 | Oil and Grease | DNQ 1.3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1271744 |
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 | 12 | 12 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2009 – Dec 08, 2016 | Oct 21, 2026 | All violations |
| Enforcement actions | 16 | 16 issued · 0 draft · 0 withdrawn, rescinded or superseded | Jul 23, 2009 – Mar 06, 2017 | Oct 21, 2026 | All actions |
| Inspections | 8 | inspections, not findings | Sep 08, 2010 – Mar 08, 2018 | 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 (47 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Aug 16, 2013 | Enforcement actions | 413566 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2013 | Violations | 852051 | Late Report | Violation | Report |
| Oct 23, 2012 | Enforcement actions | 412526 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Oct 16, 2012 | Inspections | 2017707 | B Type compliance | — | Follow-up Inspection Needed |
| Aug 31, 2012 | Enforcement actions | 410238 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2012 | Violations | 849398 | Late Report | Violation | Report |
| Apr 13, 2012 | Enforcement actions | 408587 | 13267 Letter/Order (Water Code section 13267 letter or order) | Historical | |
| Dec 02, 2011 | Violations | 847778 | Deficient BMP Implementation | Violation | Report |
| Nov 01, 2011 | Enforcement actions | 407066 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Aug 24, 2011 | Enforcement actions | 407065 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2011 | Violations | 846401 | Late Report | Violation | Report |
| Feb 15, 2011 | Enforcement actions | 404502 | Verbal Communication | Active | |
| Feb 15, 2011 | Inspections | 2010675 | B Type compliance | — | Follow-up Inspection Needed |
| Feb 15, 2011 | Inspections | 2010742 | B Type compliance | — | Follow-up Inspection Needed |
| Feb 15, 2011 | Violations | 843787 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Nov 19, 2010 | Inspections | 2009447 | B Type compliance | — | Follow-up Inspection Needed |
| Sep 08, 2010 | Enforcement actions | 402593 | Verbal Communication | Active | |
| Sep 08, 2010 | Inspections | 2008605 | B Type compliance | — | Follow-up Inspection Needed |
| Sep 08, 2010 | Violations | 842416 | Deficient BMP Implementation | Violation | Inspection |
| Sep 03, 2009 | Enforcement actions | 400932 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Jul 23, 2009 | Enforcement actions | 400813 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2009 | Violations | 840660 | 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.