Keystone Engineering Company
1600 Excise Ave, Ontario, CA 91761
UNVERIFIED1 SOURCELAST SIGNAL —
Present in a source dataset, with no recent operating signal.
Location
ADDRESS
1600 Excise Ave
Ontario, CA 91761
Ontario, CA 91761
COORDINATES
34.04413, -117.57822
COUNTY
METRO AREA
Industry
PRIMARY NAICS
EMPLOYMENT
Not reported
Sources
| SOURCE | EVIDENCE | FIRST SEEN | LAST SEEN |
|---|---|---|---|
| EPA FRS | EXISTENCE | JAN 2019 | JAN 2019 |
| 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.