Semmaterials L.p.

What they make

Where it is

Other plants nearby

Every listed plant in San Bernardino County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold 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 BR, CA-ENVIROVIEW, EIS, NPDES, RCRAINFO, TRIS, TSCA · EPA site type STATIONARY.

• EPA Toxics Release InventoryOPERATING
  first seen DEC 2023 · last seen DEC 2024
• EPA Facility Registry ServiceEXISTENCE
  Record 110001133130 · first seen JUN 2017 · last seen AUG 2024

ALSO RECORDED ASKOCH FUELS INC KOCH MATERIALS

IN SAN BERNARDINO COUNTY77 other plants share this one’s industry (Petroleum and Coal Products Manufacturing, NAICS 3241); 4 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: SEMMATERIALS L.P. · OCT 2026

Street address

EPA: 14929 SLOVER AVENUE · OCT 2026

City

EPA: FONTANA · OCT 2026

State

EPA: CA · OCT 2026

County (FIPS code)

EPA: 06071 · OCT 2026

Coordinates

EPA: 34.06293,-117.47948 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: VSQG · OCT 2026