Facility	City	Industry	Status	Distance
Otto Instrument Service, INC.	Ontario	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	ACTIVE	1.5 KM
Doble Engineering Company (Ontario, CA)	Ontario	Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513	LIKELY ACTIVE	2.0 KM
Mpm Products, INC	Ontario	Photographic Film, Paper, Plate, Chemical, and Copy Toner Manufacturing 325992	ACTIVE	2.5 KM
B a E Systems	Ontario	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	UNVERIFIED	2.6 KM
Maury Microwave, INC.	Ontario	Other Electronic Component Manufacturing 334419	ACTIVE	2.2 KM

Every listed plant in San Bernardino County

Also at this address

No other federal record shares this street address.

WHERE THIS RECORD COMES FROM — 1 FEDERAL SOURCE, 6 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 RCRAINFO · EPA site type STATIONARY.

Source	Evidence	First seen	Last seen
EPA FRS	EXISTENCE	JUN 2019	JUN 2019

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
RCRA GENERATOR STATUS	EPA ECHO	SEP 2026
STATE	EPA FRS	JUL 2026

Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

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