GCP Applied Technologies Inc
Active WDID 8 30I026390 Santa Ana, Orange County Region 8 · Santa Ana
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Santa Ana, Orange County
- Region 8 · Santa Ana · Location · Statewide map
- Receiving water
- Santa Ana Dehli Channel Reach 1 (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
- 202 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Oct 14, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 0 inspections · 1 violation record · 1 enforcement action
- 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
- 33.71353, -117.87468
- 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
- 2502 S Garnsey St, Santa Ana 92707
- 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
- Active
- Operator
- GCP Applied Technologies Inc
- Primary industry (SIC)
- 3275-Gypsum Products
- Application ID
- 468165
- NOI processed
- Jan 14, 2016
- Last certified
- Apr 06, 2022
- Facility size
- 121000 SqFt
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 468165 | Industrial | Active | Jan 14, 2016 | — | Apr 06, 2022 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Santa Ana Dehli Channel Reach 1
- 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.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Santa Ana Delhi Channel, Reach 2 CAR8011100020210408053333 | 180 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.
202 distinct measurements across 4 parameters, most recent sample Oct 14, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 8 | 4 | 0 | Oct 14, 2025 | Oct 14, 2025 |
| 2024 | 8 | 4 | 0 | Feb 13, 2025 | Feb 13, 2025 |
| 2023 | 8 | 4 | 0 | Feb 05, 2024 | Feb 05, 2024 |
| 2022 | 20 | 4 | 0 | Nov 08, 2022 | Apr 21, 2023 |
| 2021 | 8 | 4 | 0 | Dec 14, 2021 | Dec 14, 2021 |
| 2020 | 16 | 4 | 0 | Jan 29, 2021 | Mar 10, 2021 |
| 2019 | 24 | 4 | 0 | Nov 27, 2019 | Mar 12, 2020 |
| 2018 | 32 | 4 | 0 | Nov 29, 2018 | Jan 17, 2019 |
| 2017 | 24 | 4 | 0 | Jan 09, 2018 | Mar 22, 2018 |
| 2016 | 42 | 4 | 0 | Dec 21, 2016 | Feb 17, 2017 |
| 2015 | 12 | 4 | 0 | Mar 07, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Iron, Total | mg/L | 52 | 3 | Mar 07, 2016 | Oct 14, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 52 | 5 | Mar 07, 2016 | Oct 14, 2025 | Results |
| Oil and Grease | mg/L | 49 | 36 | Mar 07, 2016 | Oct 14, 2025 | Results |
| pH | SU | 49 | 0 | Mar 07, 2016 | Oct 14, 2025 | Results |
All results (202 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Oct 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365507 | |
| Oct 14, 2025 | Iron, Total | < .08 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1365507 | |
| Oct 14, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365507 | |
| Oct 14, 2025 | Oil and Grease | < 5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1365507 | |
| Oct 14, 2025 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365507 | |
| Oct 14, 2025 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | pH_Field | 1365507 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365507 | |
| Oct 14, 2025 | Total Suspended Solids (TSS) | < 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1365507 | |
| Feb 13, 2025 | Iron, Total | .1 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1333621 | |
| Feb 13, 2025 | Iron, Total | .09 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1333621 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1333621 | |
| Feb 13, 2025 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1333621 | |
| Feb 13, 2025 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1333621 | |
| Feb 13, 2025 | pH | 8.05 | SU | Effluent | Qualifying Storm Event | pH_Field | 1333621 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 63 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1333621 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1333621 | |
| Feb 05, 2024 | Iron, Total | 1.06 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1287080 | |
| Feb 05, 2024 | Iron, Total | .01 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1287080 | |
| Feb 05, 2024 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287080 | |
| Feb 05, 2024 | Oil and Grease | 4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1287080 | |
| Feb 05, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287080 | |
| Feb 05, 2024 | pH | 6.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1287080 | |
| Feb 05, 2024 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287080 | |
| Feb 05, 2024 | Total Suspended Solids (TSS) | 2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1287080 | |
| Apr 21, 2023 | Iron, Total | .61 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237975 | |
| Apr 21, 2023 | Iron, Total | .15 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237975 | |
| Apr 21, 2023 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237975 | |
| Apr 21, 2023 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237975 | |
| Apr 21, 2023 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237975 | |
| Apr 21, 2023 | pH | 7.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237975 | |
| Apr 21, 2023 | Total Suspended Solids (TSS) | 17 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237975 | |
| Apr 21, 2023 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237975 | |
| Jan 05, 2023 | Iron, Total | .3 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237975 | |
| Jan 05, 2023 | Iron, Total | .33 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237975 | |
| Jan 05, 2023 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237975 | |
| Jan 05, 2023 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237975 | |
| Jan 05, 2023 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237975 | |
| Jan 05, 2023 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237975 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 11 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237975 | |
| Jan 05, 2023 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237975 | |
| Nov 08, 2022 | Iron, Total | .38 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1237756 | |
| Nov 08, 2022 | Oil and Grease | < 3 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1237756 | |
| Nov 08, 2022 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1237756 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | 1 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237756 | |
| Dec 14, 2021 | Iron, Total | .06 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1179694 | |
| Dec 14, 2021 | Iron, Total | .05 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1179694 | |
| Dec 14, 2021 | Oil and Grease | < 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1179694 | |
| Dec 14, 2021 | Oil and Grease | 1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1179694 | |
| Dec 14, 2021 | pH | 8.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1179694 | |
| Dec 14, 2021 | pH | 8.06 | SU | Effluent | Qualifying Storm Event | pH_Field | 1179694 |
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 | 1 | 1 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 16, 2023 – Jul 16, 2023 | Oct 21, 2026 | All violations |
| Enforcement actions | 1 | 1 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 01, 2023 – Aug 01, 2023 | Oct 21, 2026 | All actions |
| Inspections | 0 | inspections, not findings | — | Oct 21, 2026 | |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 2025 | 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 (13 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 09, 2026 | Annual reports | 1338791 | Annual report 2025 | — | |
| Jun 28, 2025 | Annual reports | 1297807 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1247060 | Annual report 2023 | — | |
| Aug 02, 2023 | Annual reports | 1193247 | Annual report 2022 | — | |
| Aug 01, 2023 | Enforcement actions | 450246 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 16, 2023 | Violations | 885459 | Late Report | Violation | Report |
| Jul 13, 2022 | Annual reports | 1117042 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1065238 | Annual report 2020 | — | |
| Jul 09, 2020 | Annual reports | 982309 | Annual report 2019 | — | |
| Jul 11, 2019 | Annual reports | 958646 | Annual report 2018 | — | |
| Jul 09, 2018 | Annual reports | 944083 | Annual report 2017 | — | |
| Jul 13, 2017 | Annual reports | 883565 | Annual report 2016 | — | |
| Jul 07, 2016 | Annual reports | 860223 | Annual report 2015 | — |
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.