Interplex Nascal Inc

Terminated WDID 8 30I024652 Tustin, Orange County Region 8 · Santa Ana

At a glance

Permit Evidence: SMARTS record: Terminated Industrial; Notice of Intent (WDID code I) · Permits and applications
Location Evidence: facility-reported: Tustin, Orange County; Region 8 · Santa Ana · Location · Statewide map
Receiving water: Peters Canyon Channel (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; 0 on the 2026 303(d) list; Proximity only; not a discharge pathway · Nearby waterbodies
Monitoring results Evidence: facility-reported: 211 distinct results, 9 reporting years (2015 to 2023); Most recent sample Dec 20, 2023 · Monitoring
Compliance and enforcement records Evidence: SMARTS record: 1 inspection · 7 violation records · 8 enforcement actions; Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported: 2 records; TMDL records

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

Open this facility on the statewide map

Reported location Evidence: facility-reported

Coordinates: 33.71553, -117.8407
Precision: 4 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: 15777 Gateway Circle, Tustin 92780
Regional Water Board: 8 — Santa Ana

HUC12 watershed Evidence: spatial

Lower San Diego Creek HUC12 180702040103

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: Interplex Nascal Inc
Primary industry (SIC): 3469-Metal Stamping, NEC
Application ID: 443997
NOI processed: Jan 24, 2014
Termination effective: Apr 09, 2024
Last certified: Jan 11, 2024
Facility size: 99414 SqFt
Impervious area: 100 %

Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.

Permit history

Storm water applications for this WDID, newest first
Application	Type	Status	Processed	Terminated	Certified
443997	Industrial	Terminated	Jan 24, 2014	Apr 09, 2024	Jan 11, 2024

Every storm water application SMARTS records for this WDID, newest first (1).

Receiving water

Reported by the facility Evidence: facility-reported: Peters Canyon Channel
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.

Nearest 2026 Integrated Report waterbodies
Waterbody (2026 Integrated Report)	Distance	2026 303(d) list	Appendix A decisions
Lane Channel (Orange County) CAR8011100020210408049468	412 m	not listed	0

Waterbodies within 1.0 km of the reported facility location. Method proximity/1.

SMARTS TMDL records Evidence: SMARTS-reported

SMARTS TMDL record as reported for this facility; it is not a determination that the TMDL applies to the facility.

TMDL records SMARTS lists for this facility
TMDL	Waterbody (as reported)	Parameter	Limit	Type	Period	Due	Discharges to TMDL water
San Diego Creek and Newport Bay Toxics TMDL	San Diego Creek Watershed	Copper, Total	.027 mg/L	NEL instantaneous	FINAL	2020-07-01	Y
San Diego Creek and Newport Bay Toxics TMDL	San Diego Creek Watershed	Zinc, Total	.21 mg/L	NEL instantaneous	FINAL	2020-07-01	Y

2 records. Links between these records and specific TMDL projects or listed waterbodies have not been reviewed and are not shown.

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.

211 distinct measurements across 11 parameters, most recent sample Dec 20, 2023.

By reporting year

Distinct results by reporting year
Reporting year (July–June)	Distinct results	Parameters	First sample	Last sample
2023	12	6	Nov 15, 2023	Dec 20, 2023
2022	30	6	Nov 08, 2022	Feb 24, 2023
2021	30	6	Oct 08, 2021	Apr 22, 2022
2020	24	6	Dec 29, 2020	Mar 11, 2021
2019	24	6	Nov 20, 2019	Mar 12, 2020
2018	22	8	Nov 29, 2018	Mar 21, 2019
2017	10	10	Jan 08, 2018	Jan 08, 2018
2016	35	8	Nov 21, 2016	Feb 06, 2017
2015	24	7	Sep 09, 2015	Mar 07, 2016

By parameter

Distinct results by parameter
Parameter	Units	Measurements	Below detection	First sample	Last sample	Results
Aluminum, Total	mg/L	33	4	Sep 09, 2015	Dec 20, 2023	Results
Oil and Grease	mg/L	33	13	Sep 09, 2015	Dec 20, 2023	Results
pH	SU	33	0	Sep 09, 2015	Dec 20, 2023	Results
Zinc, Total	mg/L	33	1	Sep 09, 2015	Dec 20, 2023	Results
Total Suspended Solids (TSS)	mg/L	32	1	Sep 09, 2015	Dec 20, 2023	Results
Copper, Total	mg/L	31	1	Feb 17, 2016	Dec 20, 2023	Results
Iron, Total	mg/L	6	0	Jan 05, 2017	Jan 14, 2019	Results
Nitrite Plus Nitrate (as N)	mg/L	6	5	Jan 05, 2017	Jan 14, 2019	Results
Electrical Conductivity @ 25 Deg. C	umhos/cm	2	0	Sep 09, 2015	Sep 15, 2015	Results
Nitrate, Total (as N)	mg/L	1	0	Jan 08, 2018	Jan 08, 2018	Results
Nitrite, Total (as N)	mg/L	1	0	Jan 08, 2018	Jan 08, 2018	Results

All results (211 distinct rows)

Reported monitoring results, newest first
Sample date	Parameter	Result	Units	Location type	Event	Method	Report
Dec 20, 2023	Aluminum, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.7	1271686
Dec 20, 2023	Copper, Total	.013	mg/L	Effluent	Qualifying Storm Event	E200.7	1271686
Dec 20, 2023	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1271686
Dec 20, 2023	pH	8.1	SU	Effluent	Qualifying Storm Event	A4500HB	1271686
Dec 20, 2023	Total Suspended Solids (TSS)	.9	mg/L	Effluent	Qualifying Storm Event	A2540D	1271686
Dec 20, 2023	Zinc, Total	.031	mg/L	Effluent	Qualifying Storm Event	E200.7	1271686
Nov 15, 2023	Aluminum, Total	.12	mg/L	Effluent	Qualifying Storm Event	E200.7	1271025
Nov 15, 2023	Copper, Total	.029	mg/L	Effluent	Qualifying Storm Event	E200.7	1271025
Nov 15, 2023	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1271025
Nov 15, 2023	pH	7.5	SU	Effluent	Qualifying Storm Event	A4500HB	1271025
Nov 15, 2023	Total Suspended Solids (TSS)	10	mg/L	Effluent	Qualifying Storm Event	A2540D	1271025
Nov 15, 2023	Zinc, Total	.11	mg/L	Effluent	Qualifying Storm Event	E200.7	1271025
Feb 24, 2023	Aluminum, Total	.43	mg/L	Effluent	Qualifying Storm Event	E200.7	1229057
Feb 24, 2023	Copper, Total	.01	mg/L	Effluent	Qualifying Storm Event	E200.7	1229057
Feb 24, 2023	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1229057
Feb 24, 2023	pH	6.4	SU	Effluent	Qualifying Storm Event	A4500HB	1229057
Feb 24, 2023	Total Suspended Solids (TSS)	18	mg/L	Effluent	Qualifying Storm Event	A2540D	1229057
Feb 24, 2023	Zinc, Total	.052	mg/L	Effluent	Qualifying Storm Event	E200.7	1229057
Jan 06, 2023	Aluminum, Total	.018	mg/L	Effluent	Qualifying Storm Event	E200.7	1223726
Jan 06, 2023	Copper, Total	.0059	mg/L	Effluent	Qualifying Storm Event	E200.7	1223726
Jan 06, 2023	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1223726
Jan 06, 2023	pH	6.5	SU	Effluent	Qualifying Storm Event	A4500HB	1223726
Jan 06, 2023	Total Suspended Solids (TSS)	2	mg/L	Effluent	Qualifying Storm Event	A2540D	1223726
Jan 06, 2023	Zinc, Total	.025	mg/L	Effluent	Qualifying Storm Event	E200.7	1223726
Dec 29, 2022	Aluminum, Total	.11	mg/L	Effluent	Qualifying Storm Event	E200.7	1221685
Dec 29, 2022	Copper, Total	.03	mg/L	Effluent	Qualifying Storm Event	E200.7	1221685
Dec 29, 2022	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1221685
Dec 29, 2022	pH	7.4	SU	Effluent	Qualifying Storm Event	A4500HB	1221685
Dec 29, 2022	Total Suspended Solids (TSS)	4	mg/L	Effluent	Qualifying Storm Event	A2540D	1221685
Dec 29, 2022	Zinc, Total	.11	mg/L	Effluent	Qualifying Storm Event	E200.7	1221685
Dec 12, 2022	Aluminum, Total	.11	mg/L	Effluent	Qualifying Storm Event	E200.7	1220125
Dec 12, 2022	Copper, Total	.011	mg/L	Effluent	Qualifying Storm Event	E200.7	1220125
Dec 12, 2022	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1220125
Dec 12, 2022	pH	7.5	SU	Effluent	Qualifying Storm Event	A4500HB	1220125
Dec 12, 2022	Total Suspended Solids (TSS)	6	mg/L	Effluent	Qualifying Storm Event	A2540D	1220125
Dec 12, 2022	Zinc, Total	.053	mg/L	Effluent	Qualifying Storm Event	E200.7	1220125
Nov 08, 2022	Aluminum, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.7	1216287
Nov 08, 2022	Copper, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.7	1216287
Nov 08, 2022	Oil and Grease	ND	mg/L	Effluent	Qualifying Storm Event	E1664B	1216287
Nov 08, 2022	pH	7.1	SU	Effluent	Qualifying Storm Event	A4500HB	1216287
Nov 08, 2022	Total Suspended Solids (TSS)	10	mg/L	Effluent	Qualifying Storm Event	A2540D	1216287
Nov 08, 2022	Zinc, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.7	1216287
Apr 22, 2022	Aluminum, Total	.33	mg/L	Effluent	Qualifying Storm Event	E200.7	1186243
Apr 22, 2022	Copper, Total	.068	mg/L	Effluent	Qualifying Storm Event	E200.7	1186243
Apr 22, 2022	Oil and Grease	5.1	mg/L	Effluent	Qualifying Storm Event	E1664B	1186243
Apr 22, 2022	pH	6.5	SU	Effluent	Qualifying Storm Event	A4500HB	1186243
Apr 22, 2022	Total Suspended Solids (TSS)	26	mg/L	Effluent	Qualifying Storm Event	A2540D	1186243
Apr 22, 2022	Zinc, Total	.22	mg/L	Effluent	Qualifying Storm Event	E200.7	1186243
Dec 30, 2021	Aluminum, Total	.13	mg/L	Effluent	Qualifying Storm Event	E200.7	1180456
Dec 30, 2021	Copper, Total	.014	mg/L	Effluent	Qualifying Storm Event	E200.7	1180456

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.

Compliance and enforcement records by type
Record type	Records	As published	Dates	Retrieved	List
Violations	7	7 Violation · 0 Potential (preliminary) · 0 Dismissed	Jul 02, 2014 – Oct 08, 2021	Oct 21, 2026	All violations
Enforcement actions	8	8 issued · 0 draft · 0 withdrawn, rescinded or superseded	Jul 31, 2014 – Mar 27, 2023	Oct 21, 2026	All actions
Inspections	1	inspections, not findings	Jun 04, 2024 – Jun 04, 2024	Oct 21, 2026	All inspections
Annual reports	9	certified reports (contents not shown)	2015 – 2023	Oct 21, 2026	All reports
Water-quality-based corrective action reports	1	reports, by parameter	2021-22 – 2021-22	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 (26 records, newest first)

Compliance and enforcement records, newest first
Date	Record	ID	Type or purpose	Status as published	Detail
Jun 04, 2024	Inspections	2064552	NOT	Finalized	No Further Action
Apr 09, 2024	Annual reports	1246482	Annual report 2023	—
Jul 05, 2023	Annual reports	1192634	Annual report 2022	—
Apr 25, 2023	Water-quality-based corrective action reports	1235048	WQBCAR 2021-22	—	Copper, Total, Zinc, Total
Mar 27, 2023	Enforcement actions	449641	ACL (Administrative Civil Liability)	Historical	R8-2023-0022
Mar 27, 2023	Enforcement actions	449642	13383 Order (Water Code section 13383 order)	Historical
Jul 06, 2022	Annual reports	1116348	Annual report 2021	—
Oct 08, 2021	Violations	884721	Late Report	Violation	Report
Oct 08, 2021	Violations	884722	Effluent	Violation	Report
Jul 20, 2021	Enforcement actions	441139	SEL (Staff Enforcement Letter)	Historical
Jul 20, 2021	Violations	877193	Late Report	Violation	Report
Jul 12, 2021	Annual reports	1064506	Annual report 2020	—
Jul 13, 2020	Annual reports	981516	Annual report 2019	—
Mar 03, 2020	Enforcement actions	436456	SEL (Staff Enforcement Letter)	Historical
Feb 03, 2020	Enforcement actions	436081	SEL (Staff Enforcement Letter)	Historical
Feb 03, 2020	Enforcement actions	436087	SEL (Staff Enforcement Letter)	Historical
Feb 03, 2020	Enforcement actions	436096	SEL (Staff Enforcement Letter)	Historical
Feb 03, 2020	Violations	872479	Late Report	Violation	Report
Feb 03, 2020	Violations	872485	Late Report	Violation	Report
Feb 03, 2020	Violations	872494	Late Report	Violation	Report
Jul 11, 2019	Annual reports	957834	Annual report 2018	—
Jun 27, 2018	Annual reports	943279	Annual report 2017	—
Jun 26, 2017	Annual reports	882815	Annual report 2016	—
Jul 15, 2016	Annual reports	846863	Annual report 2015	—
Jul 31, 2014	Enforcement actions	416233	1st NNC - AR (First Notice of Non-Compliance (annual report))	Historical

Sources and provenance

Sources behind this page
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.