Industrial stormwater facility
9 37I014819 · Notice of Intent · National City, San Diego
Official
Hydrologic
Official facility coordinate plotted against the official 2026 impaired-water geometry.
303(d) context
Grouped by derived geographic association class.
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (3) Mercury, PAHs (Polycyclic Aromatic Hydrocarbons), PCBs (Polychlorinated biphenyls)
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Benthic Community Effects, Sediment Toxicity
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Benthic Community Effects, Sediment Toxicity
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Phosphorus, Selenium
River & Stream · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (2) Copper, Lead
Bay & Harbor · Integrated Report category 5 · TMDL required
Listed pollutants / stressors (1) Indicator Bacteria
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 |
|---|---|---|---|---|---|
| 2026-05-05 | North yard drain | Aluminum | 1.75 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard drain | Iron | 4.57 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard drain | Nitrate/Nitrite (Nitrite + Nitrate as N) | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard drain | Oil and Grease | 36 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard drain | pH | 7 | SU | Qualifying Storm Event |
| 2026-05-05 | North yard drain | Total Suspended Solids (TSS) | 50 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard drain | Zinc | 2.68 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Aluminum | .44 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Iron | 1.23 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Nitrate/Nitrite (Nitrite + Nitrate as N) | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Oil and Grease | 3 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | pH | 7 | SU | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Total Suspended Solids (TSS) | 9 | mg/L | Qualifying Storm Event |
| 2026-05-05 | North yard to Alley | Zinc | .82 | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Aluminum | .78 | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Iron | 1.88 | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Nitrate/Nitrite (Nitrite + Nitrate as N) | ND —(non-detect / est.) | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Oil and Grease | 2 | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | pH | 7 | SU | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Total Suspended Solids (TSS) | 71 | mg/L | Qualifying Storm Event |
| 2026-05-05 | South Lot by Vehicle gate | Zinc | 1.28 | mg/L | Qualifying Storm Event |
| 2026-02-15 | North yard drain | Aluminum | 1 | mg/L | Qualifying Storm Event |
| 2026-02-15 | North yard drain | Iron | 2.43 | mg/L | Qualifying Storm Event |
| 2026-02-15 | North yard drain | Nitrate/Nitrite (Nitrite + Nitrate as N) | .258 | mg/L | Qualifying Storm Event |
| 2026-02-15 | North yard drain | Oil and Grease | 2.1 | 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 | 1.474 mg/L | 0.75 mg/L | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.1.96× threshold | 12 eligible1 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 | 1.675 mg/L | 1 mg/L | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.1.68× 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) |
Nitrite Plus Nitrate (as N) nitrate_nitrite_n | Annual | 0.109 mg/L as N | 0.68 mg/L as N | At or below NALAnnual average of 12 eligible result(s) compared with the annual NAL.0.16× threshold | 12 eligible3 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) |
Oil and Grease oil_grease | Instantaneous maximum | —1 sample above | 25 mg/L | At or below NALOne 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. | 9 eligible3 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 | —0 samples above | 6 – 9 pH units | Within NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL. | 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 eligible2 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 | 0.844 mg/L | 0.26 mg/L | Above NALAnnual average of 12 eligible result(s) compared with the annual NAL.3.25× 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) |
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).
Provenance