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Industrial stormwater facility

EPZ INC

WDID 2 43NEC004274 · No Exposure Certification · Santa Clara, Santa Clara

SIC 3471 · Electroplating, Plating, Polishing, Anodizing, and Coloring · Regional Board 2 - San Francisco Bay Region

Official record — State Water Resources Control Board, Industrial General Permit

Hydrologic

Geographic context

Official facility coordinate plotted against the associated Final 2026 Integrated Report impaired-water geometry.

Loading map…
  • Facility location (official coordinate)
  • Associated impaired-water geometry (Final 2026 Integrated Report)
  • YDOS-derived geographic context
  • Loading associated 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.

Official facility point
37.40978, -121.96465
HUC12 subwatershed
San Jose International Airport-Frontal San Francisco Bay Estuaries
HUC12 code
180500030306
Impaired-water associations (derived)
2

Official

Facility record

Facility name
EPZ INC
WDID
2 43NEC004274
Application type
No Exposure Certification
City
Santa Clara
County
Santa Clara
ZIP
95054
Primary SIC code
3471
SIC description
Electroplating, Plating, Polishing, Anodizing, and Coloring
Date active
2016-10-03
Regional Water Board
Regional Board 2 - San Francisco Bay Region

303(d) context

Associated impaired waters

Grouped by derived geographic association class.

Derived

Subwatershed + nearby

1 waterbodies
San Tomas Aquino Creek (Santa Clara County)

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (4) Ammonia, Benthic Community Effects, Toxicity, Trash

Distance 0.94 km

Confidence high

Fact sheet ↗

Nearby impaired water

1 waterbodies
Guadalupe River

River & Stream · Integrated Report category 5 · TMDL required

Listed pollutants / stressors (8) Benthic Community Effects, Bifenthrin, Chlordane, Diazinon, Mercury, Pyrethroids +2 more

Distance 0.31 km

Confidence medium

Fact sheet ↗

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.

TMDL requirements

Water Board-stated TMDL waste load allocations applied to this industrial permit in SMARTS.

Official record — SMARTS TMDL dataset, State Water Board

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

SMARTS monitoring

Self-reported industrial stormwater sampling results as submitted by the discharger to SMARTS.

Official record — SMARTS parameter data, State Water Board
Reported results
54
Sample events
6
Distinct parameters
9
Reporting years
2016 – 2017
First sample
2016-10-28
Latest sample
2018-03-12
Source regional dataset
Region 2 - San Francisco Bay
Source retrieved
Sep 16, 2026

Official SMARTS public reports ↗

Parameters reported

Reported results over time

Loading reported results…

Most recent reported results

Latest 25 of 54
Sample dateLocationParameterResultUnitsEvent
2018-03-12Monitoring LocationAluminum.3mg/LQualifying Storm Event
2018-03-12Monitoring LocationCopper.025mg/LQualifying Storm Event
2018-03-12Monitoring LocationIron.0133mg/LQualifying Storm Event
2018-03-12Monitoring LocationNickel.027mg/LQualifying Storm Event
2018-03-12Monitoring LocationNitrate/Nitrite (Nitrite + Nitrate as N).38mg/LQualifying Storm Event
2018-03-12Monitoring LocationOil and GreaseND —(non-detect / est.)mg/LQualifying Storm Event
2018-03-12Monitoring LocationpH7.2SUQualifying Storm Event
2018-03-12Monitoring LocationTotal Suspended Solids (TSS)24.6mg/LQualifying Storm Event
2018-03-12Monitoring LocationZinc.1426mg/LQualifying Storm Event
2018-01-25Monitoring LocationAluminum.082mg/LQualifying Storm Event
2018-01-25Monitoring LocationCopper.021mg/LQualifying Storm Event
2018-01-25Monitoring LocationIron.15mg/LQualifying Storm Event
2018-01-25Monitoring LocationNickel.02mg/LQualifying Storm Event
2018-01-25Monitoring LocationNitrate/Nitrite (Nitrite + Nitrate as N).25mg/LQualifying Storm Event
2018-01-25Monitoring LocationOil and GreaseND —(non-detect / est.)mg/LQualifying Storm Event
2018-01-25Monitoring LocationpH7.4SUQualifying Storm Event
2018-01-25Monitoring LocationTotal Suspended Solids (TSS)5mg/LQualifying Storm Event
2018-01-25Monitoring LocationZinc.18mg/LQualifying Storm Event
2017-11-16Monitoring LocationAluminum.19mg/LQualifying Storm Event
2017-11-16Monitoring LocationCopper.007mg/LQualifying Storm Event
2017-11-16Monitoring LocationIron.507mg/LQualifying Storm Event
2017-11-16Monitoring LocationNickelND —(non-detect / est.)mg/LQualifying Storm Event
2017-11-16Monitoring LocationNitrate/Nitrite (Nitrite + Nitrate as N).12mg/LQualifying Storm Event
2017-11-16Monitoring LocationOil and GreaseND —(non-detect / est.)mg/LQualifying Storm Event
2017-11-16Monitoring LocationpH7.5SUQualifying 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

Numeric Action Level comparison

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).

Derived
Reporting years evaluated
2
Years with an NAL exceedance
0
Most recent evaluated year
RY 2017
Ruleset
igp_nal_ruleset_v1 / igp_nal_v1
ParameterNAL typeCalculated valueNALResultSamples usedMethod

Aluminum, Total

aluminum_total

Annual0.191 mg/L0.75 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.25× threshold3 eligiblearithmetic 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)

Copper, Total

copper_total

Annual0.018 mg/L0.033 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.53× threshold3 eligiblearithmetic 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

Annual0.223 mg/L1 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.22× threshold3 eligiblearithmetic 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)

Nickel, Total

nickel_total

Annual0.024 mg/l1.02 mg/lAt or below NALAnnual average of 2 eligible result(s) compared with the annual NAL.0.02× threshold2 eligible1 excludedarithmetic 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

Annual0.25 mg/L as N0.68 mg/L as NAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.37× threshold3 eligiblearithmetic 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 above25 mg/LNot evaluatedNo eligible analytical results for this reporting year; every reported result was excluded with a stated reason.0 eligible3 excludedcount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

pH

ph

Instantaneous maximum—0 samples above6 – 9 pH unitsWithin NAL rangeNo eligible result in this reporting year was outside the instantaneous maximum NAL.3 eligiblecount 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 above400 mg/LAt or below NALNo eligible result in this reporting year was outside the instantaneous maximum NAL.3 eligiblecount of eligible effluent results outside the instantaneous maximum NAL within the July 1 - June 30 reporting year

Zinc, Total

zinc_total

Annual0.141 mg/L0.26 mg/LAt or below NALAnnual average of 3 eligible result(s) compared with the annual NAL.0.54× threshold3 eligiblearithmetic 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).

Documents

Documents on file

Attachment inventory recorded in the State Water Board SMARTS public attachment workflow for this permit.

Source inventory — SMARTS public attachments. Documents are operator-submitted.

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 records

Enforcement actions as recorded by the State Water Board for this permit, in the source system's own terminology.

Source record — SMARTS enforcement data

Structured enforcement records are not yet connected for this site. The absence of a record is not a finding about this facility.

Reporting

Reporting and ERA records

Annual report and Exceedance Response Action information as stated by the source system, distinguished from what is inferred from document metadata.

Source record — SMARTS reporting data

Structured reporting and ERA records are not yet connected for this site.

Recent activity

Recent source changes

New or changed source records this platform detected for this permit, newest first.

Derived

No source change has been detected for this permit yet. Change detection begins from the date each dataset was first indexed.

Provenance

Source & provenance

Source agency
California State Water Resources Control Board
Source dataset
Industrial General Permit — permitted facilities (statewide GIS layer)
WDID
2 43NEC004274
Source feature ID
1018
Application type
No Exposure Certification
Regional board derivation
WDID region prefix
Geometry status
valid
Last successful facility import
Sep 16, 2026, 10:48 PM UTC

Official IGP permitted facilities feature layer ↗