Industrial stormwater facility
WDID 2 41I003737 · Notice of Intent · Redwood City, San Mateo
SIC 3479 · Coating, Engraving, and Allied Services, NEC · Regional Board 2 - San Francisco Bay Region
Hydrologic
Official facility coordinate plotted against the associated Final 2026 Integrated Report impaired-water geometry.
Geometry shown is limited to waterbodies geographically associated with this facility. Geographic association does not establish a discharge connection, receiving-water connectivity, or causation.
Intelligence summary
What is available for this facility across the connected datasets.
Official
303(d) context
Grouped by derived geographic association class.
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (1) Toxicity
Lake & Reservoir · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Oxygen, Dissolved, Trash
Coastal & Bay Shoreline · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (1) Indicator Bacteria
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (10) Chlordane, DDT (Dichlorodiphenyltrichloroethane), Dieldrin, Dioxin compounds (including 2,3,7,8-TCDD), Furan Compounds, Invasive Species +4 more
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (4) Ammonia, Benthic Community Effects, Toxicity, Trash
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (7) Aluminum, Benthic Community Effects, Diazinon, Temperature, water, Toxicity, Trash +1 more
Associations are calculated from official facility coordinates, USGS HUC12 boundaries, and official 2026 impaired-water geometry. They do not establish a discharge connection or causation.
Water Board-stated TMDL waste load allocations applied to this industrial permit in SMARTS.
No SMARTS TMDL requirement is recorded for this WDID. In the statewide TMDL export only permits in Regions 4, 8 and 9 currently carry industrial TMDL requirements, so an absence here is not a statement that the facility discharges to an unimpaired water.
Official monitoring
Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.
Loading reported results…
| Sample date | Location | Parameter | Result | Units | Event |
|---|---|---|---|---|---|
| 2024-03-29 | North spout bldg #1 | Aluminum | .17 | mg/L | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | Iron | .12 | mg/L | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | Nitrate/Nitrite (Nitrite + Nitrate as N) | .17 | mg/L | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | pH | 6.37 | SU | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | Total Suspended Solids (TSS) | 4 | mg/L | Qualifying Storm Event |
| 2024-03-29 | North spout bldg #1 | Zinc | .16 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Aluminum | .21 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Iron | .19 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Nitrate/Nitrite (Nitrite + Nitrate as N) | .21 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | pH | 6.24 | SU | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Total Suspended Solids (TSS) | 7 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 1&2 | Zinc | .13 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Aluminum | DNQ .086(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Iron | DNQ .058(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Nitrate/Nitrite (Nitrite + Nitrate as N) | .21 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Oil and Grease | DNQ 2.38(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | pH | 6.54 | SU | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Total Suspended Solids (TSS) | 2 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 3&4 | Zinc | .13 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 4&5 | Aluminum | .28 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 4&5 | Iron | DNQ .15(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 4&5 | Nitrate/Nitrite (Nitrite + Nitrate as N) | .2 | mg/L | Qualifying Storm Event |
| 2024-03-29 | south spout unit 4&5 | Oil and Grease | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
Monitoring rows are official self-reported SMARTS submissions, joined to this facility by WDID. California Stormwater Intelligence does not restate, correct, average or evaluate reported values, and no benchmark comparison or violation determination is made.
YDOS-derived
Reported SMARTS analytical results compared against the Numeric Action Levels of the Industrial General Permit version in effect for each reporting year (July 1 – June 30).
| Parameter | NAL type | Calculated value | NAL | Result | Samples used | Method |
|---|---|---|---|---|---|---|
Aluminum, Total aluminum_total | Annual | 0.789 mg/L | 0.75 mg/L | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.1.05× threshold | 12 eligible4 non-detect as zero | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
Iron, Total iron_total | Annual | 0.456 mg/L | 1 mg/L | At or below NALAnnual average of 12 eligible result(s) compared with the annual NAL.0.46× threshold | 12 eligible6 non-detect as zero | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
Nitrite Plus Nitrate (as N) nitrate_nitrite_n | Annual | 0.991 mg/L as N | 0.68 mg/L as N | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.1.46× threshold | 12 eligible | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
Oil and Grease oil_grease | Instantaneous maximum | —0 samples above | 25 mg/L | At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 12 eligible12 non-detect as zero | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
pH ph | Instantaneous maximum | —1 sample above | 6 – 9 pH units | Within NAL rangeOne eligible result in this reporting year was outside the instantaneous maximum NAL. The Order states the condition as two or more results in one reporting year. | 12 eligible | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
Total Suspended Solids (TSS) tss | Instantaneous maximum | —0 samples above | 400 mg/L | At or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 12 eligible4 non-detect as zero | count of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year |
Zinc, Total zinc_total | Annual | 0.302 mg/L | 0.26 mg/L | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.1.16× threshold | 12 eligible | arithmetic mean of all eligible effluent results in the July 1 - June 30 reporting year (censored results assigned zero only where MDL and ML were both reported) |
YDOS-derived overlap
Parameters where this facility has an NAL exceedance in at least one reporting year and the geographically associated waterbody carries a 303(d) listing for the same pollutant.
AluminumMonitoringAbove NAL303(d) impairmentStevens Creek
3 reporting years above the annual NAL, most recently RY 2023 · 1 303(d) listing · association: derived watershed association (low confidence)
Overlap is informational co-occurrence between a derived NAL comparison and an official 303(d) listing. It is not evidence that this facility caused or contributed to the impairment.
An NAL exceedance is a permit-defined condition that triggers Exceedance Response Actions under the Industrial General Permit. It is not a violation, an enforcement action, or a Water Board compliance determination. Annual values use the arithmetic average of eligible results with non-detects treated as zero; instantaneous maximum NALs (total suspended solids, oil and grease, pH) are exceeded when two or more eligible results in a reporting year fall outside the level. Rules transcribed from 2014-0057-DWQ as amended by 2015-0122-DWQ ↗ (effective 2015-07-01, superseded 2020-06-30); 2014-0057-DWQ as amended by 2018-0028-DWQ ↗ (effective 2020-07-01).
Documents
Attachment inventory recorded in the State Water Board SMARTS public attachment workflow for this permit.
No document inventory has been indexed for this permit yet. The statewide document index is being built out; coverage is reported on the data-freshness panel.
Attachments for this permit remain viewable in the source system. Open the SMARTS public workflow ↗
Enforcement
Enforcement actions as recorded by the State Water Board for this permit, in the source system's own terminology.
Structured enforcement records are not yet connected for this site. The absence of a record is not a finding about this facility.
Reporting
Annual report and Exceedance Response Action information as stated by the source system, distinguished from what is inferred from document metadata.
Structured reporting and ERA records are not yet connected for this site.
Recent activity
New or changed source records this platform detected for this permit, newest first.
No source change has been detected for this permit yet. Change detection begins from the date each dataset was first indexed.
Provenance