Facility	City	Industry	Status	Distance
Contractors Materials LLC - Heald Street	Wilmington	Asphalt Paving Mixture and Block Manufacturing 324121	UNVERIFIED	0.1 KM
Tilcon Delaware, INC. - Terminal Avenue	New Castle	Asphalt Paving Mixture and Block Manufacturing 324121	UNVERIFIED	1.0 KM
International Petroleum CORP	Wilmington	Petroleum Refineries 324110	LIKELY ACTIVE	1.2 KM
Corrado Construction CO LLC	New Castle	Asphalt Paving Mixture and Block Manufacturing 324121	UNVERIFIED	2.1 KM
Edgemoor Materials INC	Wilmington	Asphalt Paving Mixture and Block Manufacturing 324121	UNVERIFIED	2.6 KM

Every listed plant in New Castle County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold this plant, and 6 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 AIR, AIRS/AFS, DEN, EIS, ICIS · EPA site type STATIONARY.

EPA ECHO compliance recordsOPERATING
first seen JUN 2026 · last seen JUN 2026
EPA Facility Registry ServiceEXISTENCE
Record 110028232990 · first seen JAN 2015 · last seen JUN 2017

IN NEW CASTLE COUNTY14 other plants share this one’s industry (Petroleum and Coal Products Manufacturing, NAICS 3241); 1 of them has 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: DIAMOND MATERIALS LLC · OCT 2026
Street address: EPA: 924 S. HEALD ST. · OCT 2026
City: EPA: WILMINGTON · OCT 2026
State: EPA: DE · OCT 2026
County (FIPS code): EPA: 10003 · OCT 2026
Coordinates: EPA: 39.72257,-75.54829 · OCT 2026

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