Shamrock Processed Base CO
Diamond Bar, CA 91765
UNVERIFIEDLAST SEEN IN FEDERAL DATA — · 1 SOURCE
Present in a source dataset, with no recent operating signal.
What they make
Ready-Mix Concrete Manufacturing327320Where it is
33.99926, -117.83146 · CENSUS TIGER
COUNTY
METRO AREA
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Cemex Construction Materials LP | Walnut | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 1.9 KM |
| Holliday Rock Co., INC | City of Industry | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 3.9 KM |
| Pomona Plant 5 | Pomona | Ready-Mix Concrete Manufacturing 327320 | LIKELY ACTIVE | 7.3 KM |
| Robertson's Ready Mix INC | Pomona | Ready-Mix Concrete Manufacturing 327320 | UNVERIFIED | 7.3 KM |
| R F Herrera Concrete Construction | San Dimas | Concrete Block and Brick Manufacturing 327331 | UNVERIFIED | 11.2 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 1 FEDERAL SOURCE, 5 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
EPA cross-references this facility in EIS · EPA site type STATIONARY.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| EPA FRS | EXISTENCE | JUN 2017 | JUN 2017 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| CITY | EPA FRS | JUL 2026 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| STATE | EPA FRS | JUL 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.