Four Dimensions INC.

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
Thermionics Laboratory, INC.	Hayward	Semiconductor Machinery Manufacturing 333242	● ACTIVE	0.3 KM
Ultrasil, LLC	Hayward	Semiconductor and Related Device Manufacturing 334413	● ACTIVE	0.8 KM
CNC3 Nano, Incorporated	Hayward	Semiconductor and Related Device Manufacturing 334413	◇ UNVERIFIED	1.0 KM
KCKinetic Ceramics INC	Hayward	Other Electronic Component Manufacturing 334419	◇ UNVERIFIED	0.9 KM
ETEKC Technology - Hayward Eden	Hayward	Semiconductor and Related Device Manufacturing 334413	◐ LIKELY ACTIVE	1.3 KM

Every listed plant in Alameda 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 110071519479 · first seen JAN 2019 · last seen JAN 2026

ALSO RECORDED AS4 DIMENSIONS; FOUR DIMENSIONS

IN ALAMEDA COUNTY228 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 44 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: FOUR DIMENSIONS INC. · OCT 2026

Street address

EPA: 3140 DIABLO AVE · OCT 2026

City

EPA: HAYWARD · OCT 2026

State

EPA: CA · OCT 2026

County (FIPS code)

EPA: 06001 · OCT 2026

Coordinates

EPA: 37.635701,-122.121985 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: none · OCT 2026