Westak
Active WDID 2 43I006896 Sunnyvale, Santa Clara County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Sunnyvale, Santa Clara County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- Calabazas 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
- 3 waterbodies; 3 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 142 distinct results, 5 reporting years (2015 to 2025)
- Most recent sample Apr 21, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 1 violation record · 1 enforcement action
- 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
- 37.409307, -121.992035
- 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
- 1272 thru 1276 Forgewood Ave, Sunnyvale 94089
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Calabazas Creek-Frontal San Francisco Bay Estuaries HUC12 180500030405
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
- Westak
- Primary industry (SIC)
- 3672-Printed Circuit Boards
- Application ID
- 183947
- NOI processed
- May 07, 1992
- Last certified
- Jul 14, 2025
- Facility size
- 56000 SqFt
- Impervious area
- 60 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 183947 | Industrial | Active | May 07, 1992 | — | Jul 14, 2025 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Calabazas 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 (2)
- C3 facility HUC12 not corroborated
- C4 candidate more than 5 km away
1 official waterbody shares 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 |
|---|---|---|---|
| Calabazas Creek (Santa Clara County) CAR2055004020120423095155 | 460 m | listed | 1 |
| San Tomas Aquino Creek (Santa Clara County) CAR2055004020080624165713 | 874 m | listed | 4 |
| Guadalupe Slough CAR2051000020110829223355 | 966 m | listed | 1 |
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.
142 distinct measurements across 10 parameters, most recent sample Apr 21, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 48 | 8 | 0 | Nov 13, 2025 | Apr 21, 2026 |
| 2024 | 30 | 5 | 0 | Dec 14, 2024 | Feb 13, 2025 |
| 2022 | 40 | 5 | 0 | Dec 01, 2022 | Feb 28, 2023 |
| 2021 | 10 | 5 | 0 | Dec 28, 2021 | Dec 28, 2021 |
| 2015 | 14 | 7 | 0 | Jan 06, 2016 | Jan 06, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Copper, Total | mg/L | 24 | 0 | Jan 06, 2016 | Apr 21, 2026 | Results |
| Nickel, Total | mg/L | 24 | 6 | Jan 06, 2016 | Apr 21, 2026 | Results |
| Oil and Grease | mg/L | 24 | 20 | Jan 06, 2016 | Apr 21, 2026 | Results |
| pH | SU | 24 | 0 | Jan 06, 2016 | Apr 21, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 24 | 6 | Jan 06, 2016 | Apr 21, 2026 | Results |
| Ammonia, Total (as N) | mg/L | 6 | 0 | Nov 13, 2025 | Apr 21, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 6 | 0 | Nov 13, 2025 | Apr 21, 2026 | Results |
| Phosphorus, Total (as P) | mg/L | 6 | 0 | Nov 13, 2025 | Apr 21, 2026 | Results |
| Electrical Conductivity @ 25 Deg. C | umhos/cm | 2 | 0 | Jan 06, 2016 | Jan 06, 2016 | Results |
| Total Organic Carbon (TOC) | mg/L | 2 | 0 | Jan 06, 2016 | Jan 06, 2016 | Results |
All results (142 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Apr 21, 2026 | Ammonia, Total (as N) | .1 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1373878 | |
| Apr 21, 2026 | Ammonia, Total (as N) | .108 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1373878 | |
| Apr 21, 2026 | Copper, Total | .084 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373878 | |
| Apr 21, 2026 | Copper, Total | .082 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373878 | |
| Apr 21, 2026 | Nickel, Total | .007 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373878 | |
| Apr 21, 2026 | Nickel, Total | .0072 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1373878 | |
| Apr 21, 2026 | Nitrite Plus Nitrate (as N) | .427 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1373878 | |
| Apr 21, 2026 | Nitrite Plus Nitrate (as N) | .463 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1373878 | |
| Apr 21, 2026 | Oil and Grease | ND 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1373878 | |
| Apr 21, 2026 | Oil and Grease | ND .1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1373878 | |
| Apr 21, 2026 | pH | 6.11 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373878 | |
| Apr 21, 2026 | pH | 6.03 | SU | Effluent | Qualifying Storm Event | pH_Field | 1373878 | |
| Apr 21, 2026 | Phosphorus, Total (as P) | .54 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1373878 | |
| Apr 21, 2026 | Phosphorus, Total (as P) | .58 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1373878 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373878 | |
| Apr 21, 2026 | Total Suspended Solids (TSS) | 7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1373878 | |
| Dec 31, 2025 | Ammonia, Total (as N) | .729 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1365494 | |
| Dec 31, 2025 | Ammonia, Total (as N) | .322 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1365494 | |
| Dec 31, 2025 | Copper, Total | .26 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365494 | |
| Dec 31, 2025 | Copper, Total | .08 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365494 | |
| Dec 31, 2025 | Nickel, Total | .078 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365494 | |
| Dec 31, 2025 | Nickel, Total | .019 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1365494 | |
| Dec 31, 2025 | Nitrite Plus Nitrate (as N) | 1.6 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1365494 | |
| Dec 31, 2025 | Nitrite Plus Nitrate (as N) | .955 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1365494 | |
| Dec 31, 2025 | Oil and Grease | < 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365494 | |
| Dec 31, 2025 | Oil and Grease | < 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1365494 | |
| Dec 31, 2025 | pH | 6.13 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365494 | |
| Dec 31, 2025 | pH | 6.47 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365494 | |
| Dec 31, 2025 | Phosphorus, Total (as P) | .65 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365494 | |
| Dec 31, 2025 | Phosphorus, Total (as P) | .04 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365494 | |
| Dec 31, 2025 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365494 | |
| Dec 31, 2025 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365494 | |
| Nov 13, 2025 | Ammonia, Total (as N) | .693 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1362189 | |
| Nov 13, 2025 | Ammonia, Total (as N) | .478 | mg/L | Effluent | Qualifying Storm Event | A4500NH | 1362189 | |
| Nov 13, 2025 | Copper, Total | .2 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1362189 | |
| Nov 13, 2025 | Copper, Total | .11 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1362189 | |
| Nov 13, 2025 | Nickel, Total | .011 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1362189 | |
| Nov 13, 2025 | Nickel, Total | .0065 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1362189 | |
| Nov 13, 2025 | Nitrite Plus Nitrate (as N) | .558 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1362189 | |
| Nov 13, 2025 | Nitrite Plus Nitrate (as N) | .34 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1362189 | |
| Nov 13, 2025 | Oil and Grease | > 1.2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1362189 | |
| Nov 13, 2025 | Oil and Grease | > 1.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1362189 | |
| Nov 13, 2025 | pH | 7.37 | SU | Effluent | Qualifying Storm Event | pH_Field | 1362189 | |
| Nov 13, 2025 | pH | 7.52 | SU | Effluent | Qualifying Storm Event | pH_Field | 1362189 | |
| Nov 13, 2025 | Phosphorus, Total (as P) | .34 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1362189 | |
| Nov 13, 2025 | Phosphorus, Total (as P) | .19 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1362189 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 18.9 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1362189 | |
| Nov 13, 2025 | Total Suspended Solids (TSS) | 4.29 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1362189 | |
| Feb 13, 2025 | Copper, Total | .039 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343754 | |
| Feb 13, 2025 | Copper, Total | .034 | mg/L | Effluent | Qualifying Storm Event | E200.8 | 1343754 |
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 | 1 | 1 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 02, 2012 – Jul 02, 2012 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 27, 2012 – Aug 27, 2012 | Oct 21, 2026 | All actions |
| Inspections | 1 | inspections, not findings | Mar 14, 2023 – Mar 14, 2023 | 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 | 2 | reports, by parameter | 2022-23 – 2023-24 | Oct 21, 2026 | All reports |
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 (16 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 29, 2026 | Annual reports | 1336433 | Annual report 2025 | — | |
| Jul 15, 2025 | Annual reports | 1295296 | Annual report 2024 | — | |
| Jul 14, 2024 | Annual reports | 1244431 | Annual report 2023 | — | |
| Aug 15, 2023 | Annual reports | 1190490 | Annual report 2022 | — | |
| Mar 14, 2023 | Inspections | 2059644 | B Type compliance | Finalized | Additional Info Required |
| Aug 05, 2022 | Annual reports | 1113975 | Annual report 2021 | — | |
| Jul 15, 2021 | Annual reports | 1070045 | Annual report 2020 | — | |
| Jul 07, 2020 | Annual reports | 987402 | Annual report 2019 | — | |
| Aug 06, 2019 | Annual reports | 955012 | Annual report 2018 | — | |
| Aug 21, 2018 | Annual reports | 940430 | Annual report 2017 | — | |
| Sep 26, 2017 | Annual reports | 879758 | Annual report 2016 | — | |
| Jul 12, 2016 | Annual reports | 845587 | Annual report 2015 | — | |
| Aug 27, 2012 | Enforcement actions | 411007 | EPL (Expedited Payment Letter) | Historical | R2-2012-0093 |
| Jul 02, 2012 | Violations | 849985 | Late Report | Violation | Report |
| — | Water-quality-based corrective action reports | 1287758 | WQBCAR 2023-24 | — | Copper, Total, Nickel, Total |
| — | Water-quality-based corrective action reports | 1287764 | WQBCAR 2022-23 | — | Copper, Total, Nickel, Total, Oil and Grease, pH, Total Organic Carbon (TOC), Total Suspended Solids (TSS) |
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.