Certifications

Documentation is organized by material. Request the current version for your project — we provide certs specific to the source and delivery date.

No. 57 Granite Aggregate (3/4" Clean)

Graded 1" – No. 4 · commonly specified as 3/4" Clean
  • Gradation
  • State DOT approval letter
  • Alkali-reactivity testing
  • Wet electrical resistivity testing
  • Additional technical documentation

No. 67 Granite Aggregate

Graded 3/4" – No. 4
  • Gradation
  • State DOT approval letter
  • Alkali-reactivity testing
  • Wet electrical resistivity testing

No. 789 Granite Aggregate

Graded 1/2" – No. 8
  • Gradation
  • Minus No. 200
  • Los Angeles abrasion
  • State DOT approval letter

1" Clean Granite

Clean 1" — washed, no fines
  • Gradation
  • Wet electrical resistivity testing
  • State DOT approval letter