Darko Precision Inc
Terminated WDID 2 43I021339 Santa Clara, Santa Clara 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
- Santa Clara, Santa Clara County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Indirectly San Francisco 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
- 1 waterbody; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 12 distinct results, 1 reporting year (2015 to 2015)
- Most recent sample Apr 22, 2016 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 3 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
- 37.37863, -121.9434
- Precision
- 4 decimal places
- Shared point
- 2 permits report this exact point
- Matches application record
- application not found
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 470 Gianni St, Santa Clara 95054
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- San Jose International Airport-Frontal San Francisco Bay Estuaries HUC12 180500030306
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
- Darko Precision Inc
- Primary industry (SIC)
- 3544-Special Dies and Tools, Die Sets, Jigs and Fixtures, and Industrial Molds
- Secondary SIC
- 3599-Industrial and Commercial Machinery and Equipment, NEC
- Application ID
- 337910
- NOI processed
- Dec 13, 2007
- Termination effective
- Jan 12, 2018
- Last certified
- Jan 12, 2018
- Facility size
- 0.5 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
No application records for this WDID in the general applications export.
Receiving water
- Reported by the facility Evidence: facility-reported
- Indirectly San Francisco 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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Guadalupe River CAR2054005019980928160437 | 531 m | listed | 8 |
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.
12 distinct measurements across 3 parameters, most recent sample Apr 22, 2016.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2015 | 12 | 3 | 0 | Nov 24, 2015 | Apr 22, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 4 | 0 | Nov 24, 2015 | Apr 22, 2016 | Results |
| pH | SU | 4 | 0 | Nov 24, 2015 | Apr 22, 2016 | Results |
| Total Suspended Solids (TSS) | mg/L | 4 | 0 | Nov 24, 2015 | Apr 22, 2016 | Results |
All results (12 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 22, 2016 | Oil and Grease | 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 875422 | |
| Apr 22, 2016 | pH | 7.1 | SU | Effluent | Qualifying Storm Event | A4500HB | 875422 | |
| Apr 22, 2016 | Total Suspended Solids (TSS) | 7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 875422 | |
| Mar 04, 2016 | Oil and Grease | 3.9 | mg/L | Effluent | Qualifying Storm Event | E1664A | 875422 | |
| Mar 04, 2016 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 875422 | |
| Mar 04, 2016 | Total Suspended Solids (TSS) | 129 | mg/L | Effluent | Qualifying Storm Event | A2540D | 875422 | |
| Dec 03, 2015 | Oil and Grease | 4.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 875422 | |
| Dec 03, 2015 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 875422 | |
| Dec 03, 2015 | Total Suspended Solids (TSS) | 40 | mg/L | Effluent | Qualifying Storm Event | A2540D | 875422 | |
| Nov 24, 2015 | Oil and Grease | 8.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 875422 | |
| Nov 24, 2015 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | A4500HB | 875422 | |
| Nov 24, 2015 | Total Suspended Solids (TSS) | 307 | mg/L | Effluent | Qualifying Storm Event | A2540D | 875422 |
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 | 3 | 3 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2013 – Oct 02, 2021 | Oct 21, 2026 | All violations |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | May 09, 2019 – May 09, 2019 | Oct 21, 2026 | All inspections |
| Annual reports | 3 | certified reports (contents not shown) | 2015 – 2017 | 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 (7 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Oct 02, 2021 | Violations | 879825 | Failure to meet NEC criteria | Violation | Internal Report |
| Jul 15, 2021 | Violations | 878063 | Late Report | Violation | Report |
| May 09, 2019 | Inspections | 2042580 | NEC | — | Additional Info Required |
| Sep 19, 2018 | Annual reports | 937372 | Annual report 2017 | — | |
| Jun 16, 2017 | Annual reports | 876532 | Annual report 2016 | — | |
| Jul 08, 2016 | Annual reports | 847606 | Annual report 2015 | — | |
| Jul 02, 2013 | Violations | 854275 | 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.