MECS Inc
Terminated WDID 2 07I029972 Martinez, Contra Costa County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Terminated Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Martinez, Contra Costa County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Hastings Slough/Suisun Bay (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
- 104 distinct results, 3 reporting years (2022 to 2024)
- Most recent sample Mar 12, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 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
- 38.02288, -122.05487
- 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
- 1778 Mosanto Way, Martinez 94553
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Mount Diablo Creek-Frontal Suisun Bay Estuaries HUC12 180500010302
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
- Terminated
- Operator
- MECS Inc
- Primary industry (SIC)
- 2899-Chemicals and Chemical Preparations, NEC
- Application ID
- 554831
- NOI processed
- Oct 17, 2022
- Termination effective
- Jan 05, 2026
- Last certified
- Jun 29, 2023
- Facility size
- 10.96 Acres
- Impervious area
- 39 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 554831 | Industrial | Terminated | Oct 17, 2022 | Jan 05, 2026 | Jun 29, 2023 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Hastings Slough/Suisun Bay
- 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.
104 distinct measurements across 16 parameters, most recent sample Mar 12, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2024 | 24 | 12 | 0 | Nov 11, 2024 | Mar 12, 2025 |
| 2023 | 21 | 12 | 0 | Feb 01, 2024 | Feb 20, 2024 |
| 2022 | 59 | 15 | 0 | Dec 01, 2022 | Mar 09, 2023 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Aluminum, Total | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Iron, Total | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Nitrate, Total (as N) | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Nitrite, Total (as N) | mg/L | 8 | 4 | Dec 01, 2022 | Mar 12, 2025 | Results |
| pH | SU | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Vanadium, Total | mg/L | 8 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Nitrate, Total (as NO3) | mg/L | 7 | 0 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Nitrite, Total (as NO2) | mg/L | 7 | 4 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Oil and Grease | mg/L | 7 | 5 | Dec 01, 2022 | Mar 12, 2025 | Results |
| Cesium 137 | PCi/L | 4 | 1 | Dec 01, 2022 | Mar 09, 2023 | Results |
Show 4 more parameters
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Potassium, Total Recoverable | mg/L | 4 | 0 | Dec 01, 2022 | Mar 09, 2023 | Results |
| Silica, Dissolved (as SiO2) | mg/L | 4 | 0 | Dec 01, 2022 | Mar 09, 2023 | Results |
| Sulfate, Total (as S) | mg/L | 4 | 1 | Dec 01, 2022 | Mar 09, 2023 | Results |
| Zinc, Total | mg/L | 3 | 0 | Feb 20, 2024 | Mar 12, 2025 | Results |
All results (104 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Mar 12, 2025 | Aluminum, Total | 4.6 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Mar 12, 2025 | Iron, Total | 7.8 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Mar 12, 2025 | Nitrate, Total (as N) | .7 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Mar 12, 2025 | Nitrate, Total (as NO3) | 3.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1343708 | |
| Mar 12, 2025 | Nitrite Plus Nitrate (as N) | .74 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Mar 12, 2025 | Nitrite, Total (as N) | .044 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Mar 12, 2025 | Nitrite, Total (as NO2) | .15 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1343708 | |
| Mar 12, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1343708 | |
| Mar 12, 2025 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1343708 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 6.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1343708 | |
| Mar 12, 2025 | Vanadium, Total | .36 | mg/L | Effluent | Qualifying Storm Event | EPA 200.8 (Metal) | 1343708 | |
| Mar 12, 2025 | Zinc, Total | 3.9 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Nov 11, 2024 | Aluminum, Total | 1.4 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Nov 11, 2024 | Iron, Total | 2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Nov 11, 2024 | Nitrate, Total (as N) | .22 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Nov 11, 2024 | Nitrate, Total (as NO3) | .99 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1343708 | |
| Nov 11, 2024 | Nitrite Plus Nitrate (as N) | .22 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Nov 11, 2024 | Nitrite, Total (as N) | ND .044 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1343708 | |
| Nov 11, 2024 | Nitrite, Total (as NO2) | ND .15 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1343708 | |
| Nov 11, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1343708 | |
| Nov 11, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1343708 | |
| Nov 11, 2024 | Total Suspended Solids (TSS) | 18.4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1343708 | |
| Nov 11, 2024 | Vanadium, Total | 5.6 | mg/L | Effluent | Qualifying Storm Event | EPA 200.8 (Metal) | 1343708 | |
| Nov 11, 2024 | Zinc, Total | 5.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343708 | |
| Feb 20, 2024 | Aluminum, Total | 4.3 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1290326 | |
| Feb 20, 2024 | Iron, Total | 7.5 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1290326 | |
| Feb 20, 2024 | Nitrate, Total (as N) | .46 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290326 | |
| Feb 20, 2024 | Nitrate, Total (as NO3) | 2.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1290326 | |
| Feb 20, 2024 | Nitrite Plus Nitrate (as N) | .46 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290326 | |
| Feb 20, 2024 | Nitrite, Total (as N) | ND .096 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290326 | |
| Feb 20, 2024 | Nitrite, Total (as NO2) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1290326 | |
| Feb 20, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1290326 | |
| Feb 20, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1290326 | |
| Feb 20, 2024 | Total Suspended Solids (TSS) | 27 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1290326 | |
| Feb 20, 2024 | Vanadium, Total | 2.7 | mg/L | Effluent | Qualifying Storm Event | EPA 200.8 (Metal) | 1290326 | |
| Feb 20, 2024 | Zinc, Total | 7 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1290326 | |
| Feb 01, 2024 | Aluminum, Total | 5.1 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1290371 | |
| Feb 01, 2024 | Iron, Total | 11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1290371 | |
| Feb 01, 2024 | Nitrate, Total (as N) | .41 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290371 | |
| Feb 01, 2024 | Nitrite Plus Nitrate (as N) | .506 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290371 | |
| Feb 01, 2024 | Nitrite, Total (as N) | .096 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1290371 | |
| Feb 01, 2024 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1290371 | |
| Feb 01, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1290371 | |
| Feb 01, 2024 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1290371 | |
| Feb 01, 2024 | Vanadium, Total | 4.2 | mg/L | Effluent | Qualifying Storm Event | EPA 200.8 (Metal) | 1290371 | |
| Mar 09, 2023 | Aluminum, Total | .73 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1232264 | |
| Mar 09, 2023 | Cesium 137 | 4.79 | PCi/L | Effluent | Qualifying Storm Event | 1232264 | ||
| Mar 09, 2023 | Iron, Total | 2.2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1232264 | |
| Mar 09, 2023 | Nitrate, Total (as N) | 2.5 | mg/L | Effluent | Qualifying Storm Event | E300.1 | 1232264 | |
| Mar 09, 2023 | Nitrate, Total (as NO3) | 11 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1232264 |
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 | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 4 | certified reports (contents not shown) | 2022 – 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 (4 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jan 05, 2026 | Annual reports | 1341452 | Annual report 2025 | — | |
| Jul 11, 2025 | Annual reports | 1300666 | Annual report 2024 | — | |
| Jul 15, 2024 | Annual reports | 1250005 | Annual report 2023 | — | |
| Jul 07, 2023 | Annual reports | 1214809 | Annual report 2022 | — |
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.