Facility	City	Industry	Status	Distance
Systron Donner Inertial Divisi	Walnut Creek	Other Electronic Component Manufacturing 334419	UNVERIFIED	3.1 KM
Systron Donner Inertial	Concord	Other Electronic Component Manufacturing 334419	UNVERIFIED	2.9 KM
Calex Mfg. Co., INC.	Concord	Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334515	ACTIVE	3.5 KM
P T Systems INC	Concord	Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220	UNVERIFIED	5.0 KM
Odumakinde Olusoji	Pleasant Hill	Computer Storage Device Manufacturing 334112	LIKELY ACTIVE	4.8 KM

Every listed plant in Contra Costa County

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 CARB-TCH, EIS · EPA site type STATIONARY.

Source	Evidence	First seen	Last seen
EPA FRS	EXISTENCE	AUG 2024	AUG 2024

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.

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