Proto-works Machining LLC

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
3L3D Lettering Corp.	Simi valley (simi)	Commercial Printing (except Screen and Books) 323111	◇ UNVERIFIED	0.4 KM
Thales & CO LLC	Simi Valley	All Other Miscellaneous Manufacturing 339999	● ACTIVE	1.4 KM
Civilian Lab LLC	Simi Valley	Sporting and Athletic Goods Manufacturing 339920	● ACTIVE	7.0 KM
Abundant Solutions LLC	Simi Valley	Sign Manufacturing 339950	● ACTIVE	7.4 KM
Visible Graphics, INC.	Simi Valley	Sign Manufacturing 339950	● ACTIVE	8.5 KM

Every listed plant in Ventura County

Also at this address

No other federal record shares this street address.

Where this record comes from

1 source holds this plant, and 7 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in RCRAINFO · EPA site type STATIONARY.

• EPA Facility Registry ServiceEXISTENCE
  Record 110071052497 · first seen JUL 2021 · last seen JUL 2021

IN VENTURA COUNTY57 other plants share this one’s industry (Other Miscellaneous Manufacturing, NAICS 3399); 10 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name

EPA: PROTO-WORKS MACHINING LLC · OCT 2026

Street address

EPA: 4615 INDUSTRIAL ST UNIT 1U · OCT 2026

City

EPA: SIMI VALLEY · OCT 2026

State

EPA: CA · OCT 2026

County (FIPS code)

EPA: 06111 · OCT 2026

Coordinates

EPA: 34.273297,-118.703984 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: none · OCT 2026