PW Gillibrand Co Simi Valley
Active WDID 4 56I003605 Simi Valley, Ventura County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Simi Valley, Ventura County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Tripas L Tripas Canyons (as reported by the facility)
- Evidence: not confirmed 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
- 187 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Nov 17, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 5 inspections · 8 violation records · 7 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
- 34.326396, -118.703097
- 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
- 5810 Bennet Rd, Simi Valley 93063
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Upper Arroyo Simi HUC12 180701030101
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
- Gillibrand Industrial Sands LLC
- Primary industry (SIC)
- 1442-Construction Sand and Gravel
- Application ID
- 192588
- NOI processed
- Apr 03, 1992
- Last certified
- Jun 11, 2015
- Facility size
- 1107 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 192588 | Industrial | Active | Apr 03, 1992 | — | Jun 11, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Tripas L Tripas Canyons
- 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.
187 distinct measurements across 4 parameters, most recent sample Nov 17, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 8 | 4 | 0 | Oct 14, 2025 | Nov 17, 2025 |
| 2024 | 15 | 4 | 0 | Feb 07, 2025 | Mar 13, 2025 |
| 2023 | 16 | 4 | 0 | Aug 21, 2023 | Jan 22, 2024 |
| 2022 | 16 | 4 | 0 | Nov 08, 2022 | Jan 09, 2023 |
| 2021 | 16 | 4 | 0 | Oct 25, 2021 | Mar 28, 2022 |
| 2020 | 12 | 4 | 0 | Dec 28, 2020 | Jan 29, 2021 |
| 2019 | 24 | 4 | 0 | Nov 27, 2019 | Mar 12, 2020 |
| 2018 | 24 | 4 | 0 | Nov 29, 2018 | Feb 04, 2019 |
| 2017 | 16 | 4 | 0 | Jan 08, 2018 | Jan 08, 2018 |
| 2016 | 24 | 4 | 0 | Dec 16, 2016 | Feb 17, 2017 |
| 2015 | 16 | 4 | 0 | Jan 05, 2016 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Nitrite Plus Nitrate (as N) | mg/L | 47 | 0 | Jan 05, 2016 | Nov 17, 2025 | Results |
| pH | SU | 47 | 0 | Jan 05, 2016 | Nov 17, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 47 | 0 | Jan 05, 2016 | Nov 17, 2025 | Results |
| Oil and Grease | mg/L | 46 | 33 | Jan 05, 2016 | Nov 17, 2025 | Results |
All results (187 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Nov 17, 2025 | Nitrite Plus Nitrate (as N) | .817 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1360757 | |
| Nov 17, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1360757 | |
| Nov 17, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1360757 | |
| Nov 17, 2025 | Total Suspended Solids (TSS) | 51.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1360757 | |
| Oct 14, 2025 | Nitrite Plus Nitrate (as N) | 1.44 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1355500 | |
| Oct 14, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1355500 | |
| Oct 14, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1355500 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | 43.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1355500 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | .613 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1329013 | |
| Mar 13, 2025 | Nitrite Plus Nitrate (as N) | .702 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1329013 | |
| Mar 13, 2025 | Oil and Grease | DNQ 1.62 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1329013 | |
| Mar 13, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1329013 | |
| Mar 13, 2025 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1329013 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 1050 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1329013 | |
| Mar 13, 2025 | Total Suspended Solids (TSS) | 412 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1329013 | |
| Feb 07, 2025 | Nitrite Plus Nitrate (as N) | .637 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1322891 | |
| Feb 07, 2025 | Nitrite Plus Nitrate (as N) | .313 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1322891 | |
| Feb 07, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322891 | |
| Feb 07, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1322891 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322891 | |
| Feb 07, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1322891 | |
| Feb 07, 2025 | Total Suspended Solids (TSS) | 163 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322891 | |
| Feb 07, 2025 | Total Suspended Solids (TSS) | 27.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1322891 | |
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | 1.53 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1278026 | |
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | 1.28 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1278026 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1278026 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1278026 | |
| Jan 22, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278026 | |
| Jan 22, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1278026 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 580 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278026 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 123 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1278026 | |
| Aug 21, 2023 | Nitrite Plus Nitrate (as N) | 1.44 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1267525 | |
| Aug 21, 2023 | Nitrite Plus Nitrate (as N) | 2.62 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1267525 | |
| Aug 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1267525 | |
| Aug 21, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1267525 | |
| Aug 21, 2023 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1267525 | |
| Aug 21, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1267525 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 235 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1267525 | |
| Aug 21, 2023 | Total Suspended Solids (TSS) | 322 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1267525 | |
| Jan 09, 2023 | Nitrite Plus Nitrate (as N) | .537 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1227579 | |
| Jan 09, 2023 | Nitrite Plus Nitrate (as N) | 1.76 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1227579 | |
| Jan 09, 2023 | Oil and Grease | DNQ 4.07 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1227579 | |
| Jan 09, 2023 | Oil and Grease | DNQ 2.22 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1227579 | |
| Jan 09, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1227579 | |
| Jan 09, 2023 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1227579 | |
| Jan 09, 2023 | Total Suspended Solids (TSS) | 7230 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1227579 | |
| Jan 09, 2023 | Total Suspended Solids (TSS) | 1960 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1227579 | |
| Nov 08, 2022 | Nitrite Plus Nitrate (as N) | 1.05 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1222453 | |
| Nov 08, 2022 | Nitrite Plus Nitrate (as N) | 1.02 | mg/L | Effluent | Qualifying Storm Event | A4500NE | 1222453 | |
| Nov 08, 2022 | Oil and Grease | DNQ 3.11 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1222453 |
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 | 8 | 7 Violation · 1 Potential (preliminary) · 0 Dismissed | Jul 01, 1998 – Jul 10, 2024 | Oct 21, 2026 | All violations |
| Enforcement actions | 7 | 7 issued · 0 draft · 0 withdrawn, rescinded or superseded | Oct 25, 2000 – Dec 15, 2025 | Oct 21, 2026 | All actions |
| Inspections | 5 | inspections, not findings | Oct 25, 2000 – Feb 14, 2025 | 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 (31 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 08, 2026 | Annual reports | 1335559 | Annual report 2025 | — | |
| Dec 15, 2025 | Enforcement actions | 468121 | 13383 Order (Water Code section 13383 order) | Active | R4-2025-0192 |
| Jul 11, 2025 | Annual reports | 1294384 | Annual report 2024 | — | |
| Feb 14, 2025 | Inspections | 2067934 | Enforcement Follow-up | Finalized | No Further Action |
| Jul 10, 2024 | Violations | 889256 | Enforcement Action | Potential | Internal Report |
| Jul 09, 2024 | Enforcement actions | 453560 | 13383 Order (Water Code section 13383 order) | Historical | R4-2024-0188 |
| Jun 28, 2024 | Annual reports | 1243479 | Annual report 2023 | — | |
| Jun 20, 2024 | Enforcement actions | 453516 | NOV (Notice of Violation) | Active | |
| Apr 09, 2024 | Inspections | 2064968 | B Type compliance | Finalized | Additional Info Required |
| Feb 05, 2024 | Violations | 889207 | Deficient BMP Implementation | Violation | Report |
| Jul 14, 2023 | Annual reports | 1189494 | Annual report 2022 | — | |
| Jul 06, 2022 | Annual reports | 1112889 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1068905 | Annual report 2020 | — | |
| Oct 02, 2020 | Violations | 875990 | Failure to meet NEC criteria | Violation | Report |
| Jul 06, 2020 | Annual reports | 986182 | Annual report 2019 | — | |
| Jun 28, 2019 | Annual reports | 953747 | Annual report 2018 | — | |
| Jul 10, 2018 | Annual reports | 939165 | Annual report 2017 | — | |
| Jul 10, 2017 | Annual reports | 878420 | Annual report 2016 | — | |
| Jun 30, 2016 | Annual reports | 845313 | Annual report 2015 | — | |
| Jun 07, 2012 | Enforcement actions | 409072 | SEL (Staff Enforcement Letter) | Historical | |
| Oct 06, 2010 | Violations | 848061 | Deficient BMP Implementation | Violation | Report |
| Jun 23, 2010 | Enforcement actions | 404347 | SEL (Staff Enforcement Letter) | Historical | |
| Nov 26, 2008 | Violations | 843666 | Deficient BMP Implementation | Violation | Report |
| Jul 26, 2001 | Inspections | 1736888 | Enforcement Follow-up | — | Additional Info Required |
| Mar 30, 2001 | Inspections | 1736813 | Enforcement Follow-up | — | Additional Info Required |
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.