Tamco

Terminated WDID 8 36I002257 Rancho Cucamonga, San Bernardino 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: Rancho Cucamonga, San Bernardino County; Region 8 · Santa Ana · Location · Statewide map
Receiving water: Santa Ana River (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: 1 waterbody; 0 on the 2026 303(d) list; Proximity only; not a discharge pathway · Nearby waterbodies
Monitoring results Evidence: facility-reported: 573 distinct results, 7 reporting years (2015 to 2021); Most recent sample Dec 23, 2021 · Monitoring
Compliance and enforcement records Evidence: SMARTS record: 10 inspections · 3 violation records · 4 enforcement actions; Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported: 0 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: 34.09905, -117.53397
Precision: 5 decimal places
Shared point: 2 permits report this exact point
Matches application record: same

Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.

Facility address: 12459 B Arrow Rte, Rancho Cucamonga 91739
Regional Water Board: 8 — Santa Ana

HUC12 watershed Evidence: spatial

East Etiwanda Creek-Santa Ana River HUC12 180702030804

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: Tamco
Primary industry (SIC): 3312-Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills
Application ID: 213131
NOI processed: Mar 31, 1992
Termination effective: Feb 07, 2022
Last certified: Jan 30, 2020
Facility size: 85 Acres
Impervious area: 59 %

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
213131	Industrial	Terminated	Mar 31, 1992	Feb 07, 2022	Jan 30, 2020

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

Receiving water

Reported by the facility Evidence: facility-reported: Santa Ana River
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 (1)

C1 name is only a prefix of official names

6 official waterbodies share 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.

Nearest 2026 Integrated Report waterbodies
Waterbody (2026 Integrated Report)	Distance	2026 303(d) list	Appendix A decisions
Day Canyon Creek (Valley Reach) CAR8012100019991013171811	679 m	not listed	0

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.

573 distinct measurements across 11 parameters, most recent sample Dec 23, 2021.

By reporting year

Distinct results by reporting year
Reporting year (July–June)	Distinct results	Parameters	First sample	Last sample
2021	36	9	Dec 14, 2021	Dec 23, 2021
2020	27	9	Jan 29, 2021	Jan 29, 2021
2019	99	11	Dec 26, 2019	Apr 06, 2020
2018	143	11	Nov 29, 2018	Mar 06, 2019
2017	55	11	Jan 09, 2018	Mar 21, 2018
2016	88	11	Dec 16, 2016	Jan 09, 2017
2015	125	11	Sep 15, 2015	Jan 05, 2016

By parameter

Distinct results by parameter
Parameter	Units	Measurements	Below detection	First sample	Last sample	Results
Aluminum, Total	mg/L	54	0	Sep 15, 2015	Dec 23, 2021	Results
Cadmium, Total	mg/L	54	15	Sep 15, 2015	Dec 23, 2021	Results
Copper, Total	mg/L	54	1	Sep 15, 2015	Dec 23, 2021	Results
Iron, Total	mg/L	54	0	Sep 15, 2015	Dec 23, 2021	Results
Lead, Total	mg/L	54	9	Sep 15, 2015	Dec 23, 2021	Results
pH	SU	54	0	Sep 15, 2015	Dec 23, 2021	Results
Total Suspended Solids (TSS)	mg/L	54	0	Sep 15, 2015	Dec 23, 2021	Results
Zinc, Total	mg/L	54	0	Sep 15, 2015	Dec 23, 2021	Results
Oil and Grease	mg/L	48	27	Sep 15, 2015	Dec 23, 2021	Results
Chromium (Total)	mg/L	47	3	Sep 15, 2015	Apr 06, 2020	Results
Manganese, Total	mg/L	46	1	Sep 15, 2015	Apr 06, 2020	Results

All results (573 distinct rows)

Reported monitoring results, newest first
Sample date	Parameter	Result	Units	Location type	Event	Method	Report
Dec 23, 2021	Aluminum, Total	.9	mg/L	Effluent	Qualifying Storm Event	E200.7	1174545
Dec 23, 2021	Cadmium, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.8	1174545
Dec 23, 2021	Copper, Total	.014	mg/L	Effluent	Qualifying Storm Event	E200.8	1174545
Dec 23, 2021	Iron, Total	.87	mg/L	Effluent	Qualifying Storm Event	E200.7	1174545
Dec 23, 2021	Lead, Total	DNQ .0052	mg/L	Effluent	Qualifying Storm Event	E200.8	1174545
Dec 23, 2021	Oil and Grease	11	mg/L	Effluent	Qualifying Storm Event	E1664B	1174545
Dec 23, 2021	pH	7	SU	Effluent	Qualifying Storm Event	pH_Field	1174545
Dec 23, 2021	Total Suspended Solids (TSS)	48	mg/L	Effluent	Qualifying Storm Event	A2540D	1174545
Dec 23, 2021	Zinc, Total	.048	mg/L	Effluent	Qualifying Storm Event	E200.8	1174545
Dec 14, 2021	Aluminum, Total	1.3	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Aluminum, Total	.64	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Aluminum, Total	1.8	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Cadmium, Total	DNQ .00027	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Cadmium, Total	DNQ .0003	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Cadmium, Total	DNQ .00028	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Copper, Total	.014	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Copper, Total	.01	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Copper, Total	.016	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Iron, Total	1.1	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Iron, Total	.78	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Iron, Total	2.5	mg/L	Effluent	Qualifying Storm Event	E200.7	1176138
Dec 14, 2021	Lead, Total	DNQ .0086	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Lead, Total	DNQ .0079	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Lead, Total	DNQ .0097	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Oil and Grease	6.2	mg/L	Effluent	Qualifying Storm Event	E1664B	1176138
Dec 14, 2021	Oil and Grease	6.6	mg/L	Effluent	Qualifying Storm Event	E1664B	1176138
Dec 14, 2021	Oil and Grease	6.5	mg/L	Effluent	Qualifying Storm Event	E1664B	1176138
Dec 14, 2021	pH	8	SU	Effluent	Qualifying Storm Event	pH_Field	1176138
Dec 14, 2021	pH	8.3	SU	Effluent	Qualifying Storm Event	pH_Field	1176138
Dec 14, 2021	pH	7.1	SU	Effluent	Qualifying Storm Event	pH_Field	1176138
Dec 14, 2021	Total Suspended Solids (TSS)	36	mg/L	Effluent	Qualifying Storm Event	A2540D	1176138
Dec 14, 2021	Total Suspended Solids (TSS)	20	mg/L	Effluent	Qualifying Storm Event	A2540D	1176138
Dec 14, 2021	Total Suspended Solids (TSS)	61	mg/L	Effluent	Qualifying Storm Event	A2540D	1176138
Dec 14, 2021	Zinc, Total	.063	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Zinc, Total	.095	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Dec 14, 2021	Zinc, Total	.12	mg/L	Effluent	Qualifying Storm Event	E200.8	1176138
Jan 29, 2021	Aluminum, Total	1.7	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Aluminum, Total	.39	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Aluminum, Total	.9	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Cadmium, Total	ND	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Cadmium, Total	DNQ .0002	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Cadmium, Total	DNQ .00074	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Copper, Total	.013	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Copper, Total	DNQ .0093	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Copper, Total	.021	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Iron, Total	1.4	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Iron, Total	.57	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Iron, Total	1.4	mg/L	Effluent	Qualifying Storm Event	E200.7	1141875
Jan 29, 2021	Lead, Total	DNQ .0034	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875
Jan 29, 2021	Lead, Total	DNQ .0069	mg/L	Effluent	Qualifying Storm Event	E200.8	1141875

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	3	3 Violation · 0 Potential (preliminary) · 0 Dismissed	Dec 15, 2004 – Nov 22, 2011	Oct 21, 2026	All violations
Enforcement actions	4	4 issued · 0 draft · 0 withdrawn, rescinded or superseded	Mar 31, 1992 – Jun 26, 2012	Oct 21, 2026	All actions
Inspections	10	inspections, not findings	Dec 15, 2004 – Apr 18, 2017	Oct 21, 2026	All inspections
Annual reports	7	certified reports (contents not shown)	2015 – 2021	Oct 21, 2026	All reports
Water-quality-based corrective action reports	0	reports, by parameter	—	Oct 21, 2026

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 (24 records, newest first)

Compliance and enforcement records, newest first
Date	Record	ID	Type or purpose	Status as published	Detail
Feb 07, 2022	Annual reports	1110729	Annual report 2021	—
Jul 09, 2021	Annual reports	1066645	Annual report 2020	—
Jun 29, 2020	Annual reports	983773	Annual report 2019	—
Jul 12, 2019	Annual reports	951264	Annual report 2018	—
Jul 12, 2018	Annual reports	936670	Annual report 2017	—
Jul 14, 2017	Annual reports	875793	Annual report 2016	—
Apr 18, 2017	Inspections	2033466	B Type compliance	—	No Further Action
Jul 15, 2016	Annual reports	840968	Annual report 2015	—
Oct 27, 2014	Inspections	2024097	B Type compliance	—	Follow-up Inspection Needed
Jun 26, 2012	Enforcement actions	408938	Verbal Communication	Historical
Feb 15, 2012	Inspections	2014518	B Type compliance	—	Additional Info Required
Dec 01, 2011	Inspections	2014512	Enforcement Follow-up	—	Additional Info Required
Nov 22, 2011	Enforcement actions	408146	Verbal Communication	Historical
Nov 22, 2011	Inspections	2014510	B Type compliance	—	Additional Info Required
Nov 22, 2011	Violations	847458	Deficient BMP Implementation	Violation	Inspection
May 19, 2009	Inspections	1784810	Non-compliance Follow-up	—	Additional Info Required
Mar 31, 2009	Inspections	2001261	B Type compliance	—	Follow-up Inspection Needed
Mar 22, 2005	Inspections	1691850	Non-compliance Follow-up	—	Follow-up Inspection Needed
Mar 22, 2005	Inspections	1691851	Non-compliance Follow-up	—	Follow-up Inspection Needed
Mar 22, 2005	Violations	435732	Incomplete/Insufficient SWPPP	Violation	Inspection
Dec 15, 2004	Inspections	791854	B Type compliance	—	Violation
Dec 15, 2004	Violations	435722	Incomplete/Insufficient SWPPP	Violation	Inspection
Mar 31, 1992	Enforcement actions	311668	SEL (Staff Enforcement Letter)	Historical	97-03DWQ
Mar 31, 1992	Enforcement actions	311672	SEL (Staff Enforcement Letter)	Historical	97-03DWQ

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.