Keystone Engineering Company
Active WDID 4 19I000310 Long Beach, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Long Beach, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Los Cerritos Channel (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
- 2 waterbodies; 1 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 335 distinct results, 4 reporting years (2022 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 15 violation records · 14 enforcement actions
- Counts as published in SMARTS; not a compliance determination · Details
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
Reported location Evidence: facility-reported
- Coordinates
- 33.81885, -118.14192
- Precision
- 5 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
- 4401 Donald Douglas, Long Beach 90808
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Alamitos Bay HUC12 180701060702
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
- Active
- Operator
- Keystone Engineering Company
- Primary industry (SIC)
- 3499-Fabricated Metal Products, NEC
- Application ID
- 188586
- NOI processed
- Mar 06, 1992
- Last certified
- Jul 10, 2026
- Facility size
- 111000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 188586 | Industrial | Active | Mar 06, 1992 | — | Jul 10, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Los Cerritos Channel
- Discharges directly / indirectly
- Y / N (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 (2)
- C3 facility HUC12 not corroborated
- C4 candidate has no geometry
1 official waterbody shares 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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Spring Street Channel CAR4051500020210715071088 | 83 m | listed | 3 |
| Keynote Street Channel CAR4051500020210715070707 | 876 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 | Waterbody (as reported) | Parameter | Limit | Type | Period | Due | Discharges to TMDL water |
|---|---|---|---|---|---|---|---|
| Los Cerritos Channel TMDL | Los Cerritos Channel | Copper, Total | .0098 mg/L | NEL instantaneous | FINAL | 2020-07-01 | Y |
| Los Cerritos Channel TMDL | Los Cerritos Channel | Zinc, Total | .0956 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.
335 distinct measurements across 14 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 76 | 13 | 0 | Oct 14, 2025 | Feb 16, 2026 |
| 2024 | 71 | 12 | 0 | Feb 07, 2025 | Mar 13, 2025 |
| 2023 | 140 | 10 | 0 | Dec 21, 2023 | Feb 20, 2024 |
| 2022 | 48 | 8 | 0 | Nov 08, 2022 | Mar 29, 2023 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 33 | 33 | Nov 08, 2022 | Feb 16, 2026 | Results |
| pH | SU | 33 | 0 | Nov 08, 2022 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 33 | 13 | Nov 08, 2022 | Feb 16, 2026 | Results |
| Aluminum, Total | mg/L | 31 | 13 | Feb 27, 2023 | Feb 16, 2026 | Results |
| Iron, Total | mg/L | 31 | 11 | Feb 27, 2023 | Feb 16, 2026 | Results |
| Nitrite Plus Nitrate (as N) | mg/L | 31 | 4 | Feb 27, 2023 | Feb 16, 2026 | Results |
| Zinc, Total | mg/L | 30 | 3 | Feb 27, 2023 | Feb 16, 2026 | Results |
| Copper, Total | mg/L | 26 | 2 | Dec 21, 2023 | Feb 16, 2026 | Results |
| Nickel, Total | mg/L | 26 | 20 | Dec 21, 2023 | Feb 16, 2026 | Results |
| Phosphorus, Total (as P) | mg/L | 26 | 11 | Dec 21, 2023 | Feb 16, 2026 | Results |
| Nitrate, Total (as N) | mg/L | 12 | 0 | Feb 07, 2025 | Feb 16, 2026 | Results |
| Nitrite, Total (as N) | mg/L | 12 | 6 | Feb 07, 2025 | Feb 16, 2026 | Results |
Show 2 more parameters
pH results (33 distinct rows, show all)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | pH | 8.86 | SU | Effluent | Qualifying Storm Event | pH_Field | 1374664 | |
| Dec 24, 2025 | pH | 8.51 | SU | Effluent | Qualifying Storm Event | A4500HB | 1364918 | |
| Nov 20, 2025 | pH | 7.26 | SU | Effluent | Qualifying Storm Event | pH_Field | 1362285 | |
| Nov 20, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1362285 | |
| Oct 14, 2025 | pH | 6.56 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357363 | |
| Oct 14, 2025 | pH | 6.97 | SU | Effluent | Qualifying Storm Event | pH_Field | 1357363 | |
| Mar 13, 2025 | pH | 6.67 | SU | Effluent | Qualifying Storm Event | pH_Field | 1344046 | |
| Mar 13, 2025 | pH | 6.93 | SU | Effluent | Qualifying Storm Event | pH_Field | 1344046 | |
| Feb 13, 2025 | pH | 7.49 | SU | Effluent | Qualifying Storm Event | pH_Field | 1344036 | |
| Feb 13, 2025 | pH | 7.22 | SU | Effluent | Qualifying Storm Event | pH_Field | 1344036 | |
| Feb 07, 2025 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 1344009 | |
| Feb 07, 2025 | pH | 7.2 | SU | Effluent | Qualifying Storm Event | pH_Field | 1344009 | |
| Feb 20, 2024 | pH | 7.64 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282029 | |
| Feb 20, 2024 | pH | 7.36 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282029 | |
| Feb 20, 2024 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282029 | |
| Feb 20, 2024 | pH | 6.93 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282029 | |
| Feb 05, 2024 | pH | 7.46 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282020 | |
| Feb 05, 2024 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282020 | |
| Feb 05, 2024 | pH | 8.01 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282020 | |
| Feb 05, 2024 | pH | 7.08 | SU | Effluent | Qualifying Storm Event | pH_Field | 1282020 | |
| Jan 22, 2024 | pH | 7.76 | SU | Effluent | Qualifying Storm Event | pH_Field | 1281384 | |
| Jan 22, 2024 | pH | 7.22 | SU | Effluent | Qualifying Storm Event | pH_Field | 1281384 | |
| Jan 22, 2024 | pH | 6.76 | SU | Effluent | Qualifying Storm Event | pH_Field | 1281384 | |
| Dec 21, 2023 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274028 | |
| Dec 21, 2023 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274028 | |
| Dec 21, 2023 | pH | 6.9 | SU | Effluent | Qualifying Storm Event | pH_Field | 1274028 | |
| Mar 29, 2023 | pH | 8.66 | SU | Effluent | Qualifying Storm Event | pH_Field | 1250501 | |
| Mar 29, 2023 | pH | 7.92 | SU | Effluent | Qualifying Storm Event | pH_Field | 1250501 | |
| Mar 29, 2023 | pH | 7.57 | SU | Effluent | Qualifying Storm Event | pH_Field | 1250501 | |
| Feb 27, 2023 | pH | 9.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1227289 | |
| Feb 27, 2023 | pH | 9.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1227289 | |
| Nov 08, 2022 | pH | > 7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1227085 | |
| Nov 08, 2022 | pH | > 8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1227085 |
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.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 15 | 15 Violation · 0 Potential (preliminary) · 0 Dismissed | Jan 29, 2002 – Jul 22, 2026 | Oct 21, 2026 | All violations |
| Enforcement actions | 14 | 14 issued · 0 draft · 0 withdrawn, rescinded or superseded | Mar 14, 2002 – Jul 22, 2026 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Jan 29, 2002 – Feb 08, 2023 | Oct 21, 2026 | All inspections |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 1 | reports, by parameter | 2023-24 – 2023-24 | 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 (44 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Nov 13, 2020 | Enforcement actions | 439081 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Nov 13, 2020 | Violations | 875278 | Late Report | Violation | Report |
| Sep 07, 2020 | Annual reports | 955632 | Annual report 2018 | — | |
| Oct 17, 2019 | Enforcement actions | 434310 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Sep 17, 2019 | Enforcement actions | 434139 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Sep 17, 2019 | Violations | 871013 | Late Report | Violation | Report |
| Oct 22, 2018 | Annual reports | 941054 | Annual report 2017 | — | |
| Oct 03, 2018 | Enforcement actions | 430746 | 2nd NNC - AR (Second Notice of Non-Compliance (annual report)) | Historical | |
| Aug 28, 2018 | Enforcement actions | 430320 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Aug 28, 2018 | Violations | 867415 | Late Report | Violation | Report |
| Jul 14, 2017 | Annual reports | 880418 | Annual report 2016 | — | |
| Jul 06, 2016 | Annual reports | 845599 | Annual report 2015 | — | |
| Feb 26, 2015 | Enforcement actions | 418603 | NTC (Notice to Comply) | Historical | |
| Feb 26, 2015 | Inspections | 2025202 | B Type compliance | — | Follow-up Inspection Needed |
| Feb 26, 2015 | Violations | 856817 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Mar 14, 2002 | Enforcement actions | 241195 | NTC (Notice to Comply) | Historical | NTC |
| Jan 29, 2002 | Inspections | 1734372 | B Type compliance | — | Additional Info Required |
| Jan 29, 2002 | Violations | 203892 | Deficient BMP Implementation | Violation | Inspection |
| Jan 29, 2002 | Violations | 203893 | Deficient BMP Implementation | Violation | Inspection |
Sources and provenance
| 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.