Sentinel Management INC
3000 Leavitt Rd Unit 1, Lorain, OH 44052
Operating signal within 12 months from two or more independent sources.
What they make
Machine Shops332710Semco Carbon Graphite Machining performs custom machining of carbon and graphite materials, offering graphite machining, bulk material sales, recycling services, and treatment services. The company serves industries including chemical process and heat exchangers, diamond tool manufacturing, electroplating, heat treatment, induction furnaces, metal casting, precious metals, and solar and crystal applications. The company holds ISO 9001:2015 certification.
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Duray Machine Company, INC. | Lorain | Machine Shops 332710 | UNVERIFIED | 4.8 KM |
| Nelson Stud Welding, INC. | Elyria | Bolt, Nut, Screw, Rivet, and Washer Manufacturing 332722 | ACTIVE | 7.7 KM |
| SEF - Nelson Stud Welding - Liberty | Elyria | Bolt, Nut, Screw, Rivet, and Washer Manufacturing 332722 | LIKELY ACTIVE | 7.3 KM |
| K & L Sales LLC | Vermilion | Precision Turned Product Manufacturing 332721 | UNVERIFIED | 7.2 KM |
| Duffin Mfg CO | Elyria | Machine Shops 332710 | UNVERIFIED | 9.1 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 8 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 OSHA-OIS.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| SAM GOV | OPERATING | DEC 2025 | DEC 2025 |
| EPA FRS | EXISTENCE | SEP 2018 | SEP 2018 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| ADDRESS LINE1 | SAM GOV | DEC 2025 |
| CAGE CODE | SAM GOV | DEC 2025 |
| CITY | EPA FRS | JUL 2026 |
| CITY | SAM GOV | DEC 2025 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| NAME | SAM GOV | DEC 2025 |
| REGISTRATION EXPIRATION | SAM GOV | DEC 2025 |
| STATE | EPA FRS | JUL 2026 |
| STATE | SAM GOV | DEC 2025 |
| WEBSITE | SAM GOV | DEC 2025 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.