Facility	City	Industry	Status	Distance
West Chester Branch 28	West Chester	Industrial Gas Manufacturing 325120	LIKELY ACTIVE	0.3 KM
Chem Service Inc	West Chester	All Other Basic Organic Chemical Manufacturing 325199	LIKELY ACTIVE	3.2 KM
Cookson Matthey/west Chester	West Chester	Basic Chemical Manufacturing 325100	UNVERIFIED	6.8 KM
Shannon Chemical Corporation	Exton	Other Basic Inorganic Chemical Manufacturing 325180	ACTIVE	7.9 KM
Veltek Associates, Inc. - CW	Exton	All Other Basic Organic Chemical Manufacturing 325199	LIKELY ACTIVE	8.5 KM

Every listed plant in Chester County

Also at this address

No other federal record shares this street address.

WHERE THIS RECORD COMES FROM — 4 FEDERAL SOURCES, 7 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 AIR, AIRS/AFS, BR, EIS, ICIS, NCDB, NPDES, PA-EFACTS, RCRAINFO, TRIS, TSCA · EPA site type STATIONARY.

Source	Evidence	First seen	Last seen
EPA ECHO	OPERATING	FEB 2026	FEB 2026
OSHA ITA	OPERATING	DEC 2025	DEC 2025
EPA TRI	OPERATING	DEC 2023	DEC 2023
EPA FRS	EXISTENCE	JUL 2020	JUL 2020

FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT

FIELD	SOURCE	SIGNAL
ADDRESS LINE1	EPA FRS	JUL 2026
CITY	EPA FRS	JUL 2026
EMPLOYEE BAND	OSHA ITA	DEC 2025
GEOM	CENSUS GEOCODER	JUL 2026
GEOM	EPA FRS	JUL 2026
NAME	EPA FRS	JUL 2026
RCRA GENERATOR STATUS	EPA ECHO	AUG 2026
STATE	EPA FRS	JUL 2026

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

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