Safety Incidents OSHA Severe Injury Reports · 2015–2025
5,189,992Inspections Most recent open 2026-07-18 Last loaded 2026-07-22

OSHA Inspection: 4 DIAMOND CONSTRUCTION INC.

Complaint inspection · Safety discipline

On , OSHA opened a complaint safety inspection of 4 DIAMOND CONSTRUCTION INC. in 4425 TREAT BLVD, CONCORD, CA 94521 (NAICS 236220). OSHA activity number 344113410.

What this inspection record means

OSHA opens inspections for many reasons — routine scheduling under a national or local emphasis program, an employee complaint or referral, or a follow-up after a reported injury. Opening or conducting an inspection is not itself an allegation or a finding that this employer broke any rule; any findings appear as the citations listed below, and citations can be contested, reduced, or withdrawn.

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Site address
4425 TREAT BLVD
City
CONCORD
State
CA
ZIP
94521
Mailing
800 S STOCKTON AVE #4, RIPON, CA 95366
Inspection type
Complaint (B)
Scope
Partial (B)
Discipline
Safety
Advance notice
No
Union status
B
Opened
Closing conference
Case closed
Last modified
Data loaded
NAICS code
236220
Employees
9
Ownership type
A

2 citations on file for this inspection.

1670(A)

Other-than-serious Gravity 10 1 instance 2 exposed
Issued
Dec 2, 2019
Penalty
Initial $500 · Current $500
Recent events (1)
  • — Z (O) $500

3276(E)(15)(E)

Other-than-serious Gravity 10 1 instance 2 exposed
Issued
Dec 2, 2019
Penalty
Initial $500 · Current $500
Recent events (1)
  • — Z (O) $500

This record is reproduced from the U.S. Department of Labor Open Data API (OSHA inspection dataset). The original IMIS detail view is available at OSHA's Establishment Search for activity number 344113410.

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