Campus Alert Archive
UMD

A Nitric Acid Spill, a Basement Lab Explosion, and Three Connected Buildings Evacuated at UMD

MNhazmatemergency notificationmedium confidence
Confirmed Threat

At 9:20 AM CDT on September 12, 2024, a graduate student spilled nitric acid in a basement lab in Voss-Kovach Hall at the University of Minnesota Duluth, triggering a small chemical explosion. UMD pushed a SAFE-U emergency alert at 9:58 AM CDT ordering Voss-Kovach Hall evacuated, followed by a second alert evacuating the connected Engineering and Endazhi gikinoo'amaading buildings because they share a ventilation system. The graduate student was taken to the hospital with minor injuries, and all three buildings were declared safe and reopened at 3:53 PM CDT.

Alerts
3
Response
—
Killed
0
Injured
1
Institution
University of Minnesota Duluth
Public R2 · MN
~11,500 studentsSAFE-U
Confirmed Timeline

Alert Sequence

3 messages in sequence · 2 verified verbatim

Some alert texts below are approximate reconstructions from news coverage, not confirmed verbatim transcripts. Reconstructed texts are shown in italic with a dashed border. Verified verbatim texts have a solid border and are marked accordingly.

INITIAL ALERTSMS
Verified verbatimSAFE-U alert text quoted in The Bark UMD student newspaper article on the September 12, 2024 chemical explosion177 chars
UMD Police Department, Duluth Fire, and other authorities are responding to a chemical explosion that occurred in a lab in Voss Kovach Hall. Voss Kovach Hall has been evacuated.
Sent at 9:58 AM CDT — 38 minutes after the 9:20 AM CDT nitric acid spill in the basement lab
Names three responding agencies (UMD Police, Duluth Fire, 'other authorities') in the first sentence — multi-agency framing typical for lab incidents
Uses 'chemical explosion' explicitly rather than softer 'chemical incident' — direct hazard framing
Does not name the chemical (nitric acid) or the building's basement location — kept short for the SMS-character constraint
UPDATESMS
Approximate reconstruction128 chars
SAFE-U: Evacuate Engineering Building and Endazhi gikinoo'amaading. Connected ventilation with Voss-Kovach. Move to a safe area.

This text has been reconstructed from news coverage and may not reflect the exact original wording.

Reconstructed; the second alert evacuated two additional buildings connected to Voss-Kovach Hall via shared ventilation, a critical infrastructure detail in chemical-incident response
Endazhi gikinoo'amaading is the Ojibwe-language name for UMD's Native American academic and cultural center, opened in 2024 — its inclusion in the alert reflects UMD's shared-ventilation building cluster
The decision to evacuate based on shared ventilation rather than confirmed contamination is a precautionary best practice for hazmat incidents in interconnected academic buildings
ALL CLEARSMS+5h 55m
Verified verbatimOfficial University of Minnesota Duluth Facebook page posting the SAFE-U Alert #4 all-clear verbatim on September 12, 2024181 chars
UMD SAFE-U Alert: Effective immediately, building evacuations are lifted and all campus buildings are open and safe to enter. Check the SAFE-U email for more information. (Alert #4)
Verbatim text from the official University of Minnesota Duluth Facebook page, which posted this SAFE-U Alert as Alert #4 — the all-clear issued at approximately 3:53 PM CDT
The actual text says 'all campus buildings' rather than naming Voss-Kovach Hall, the Engineering Building, and Endazhi gikinoo'amaading individually — a broader-scope all-clear than the individual-building evacuation alerts
The unusually long evacuation duration reflects the complexity of clearing nitric acid vapors from a multi-building shared-ventilation system
Context

Background

The University of Minnesota Duluth is a public R2 doctoral university with about 11,500 students. On Thursday morning, September 12, 2024, at approximately 9:20 AM CDT, a graduate student in a basement chemistry lab in Voss-Kovach Hall spilled nitric acid, causing a small chemical explosion. The student sustained minor injuries and was taken to the hospital. UMD pushed a SAFE-U alert at 9:58 AM CDT ordering Voss-Kovach Hall evacuated, then a second alert evacuating the connected Engineering Building and Endazhi gikinoo'amaading because they share a ventilation system with Voss-Kovach. Likely hundreds of people were evacuated since classes were in session. Duluth Fire's hazmat team responded and worked to ventilate the affected areas. UMD lifted all evacuations at 3:53 PM CDT — about 6.5 hours after the explosion. UMD officials announced an investigation into the incident, which was contained to a small section of one lab.
Analysis

Key Findings

The 38-minute delay from explosion to first alert reflects the time required to confirm chemical identity and ventilation contamination — longer than most active-threat alerts but appropriate for chemical incidents
The decision to evacuate three connected buildings based on shared ventilation, before contamination was confirmed in the additional buildings, illustrates a precautionary hazmat best practice
The 6.5-hour evacuation duration reflects the difficulty of clearing nitric acid vapors from a complex shared-ventilation system
Endazhi gikinoo'amaading is UMD's Indigenous academic center; its inclusion in the alert sequence reflects the integration of newer campus buildings into legacy ventilation systems
Outcome
One graduate student was transported to the hospital with minor injuries from the nitric acid explosion. UMD ordered three connected buildings (Voss-Kovach Hall, Engineering, and Endazhi gikinoo'amaading) evacuated due to a shared ventilation system. Hundreds of students, faculty, and staff were displaced during ongoing classes. Hazmat crews from Duluth Fire and the University responded; buildings were cleared and reopened at 3:53 PM CDT.
Provenance

Sources

  1. Student Paper
    Nitric Acid Spill Caused UMD Chemical Explosion (The Bark)
    thebarkumd.com
  2. News
    Student sustains minor injuries in chemical explosion at UMD (Duluth News Tribune)
    duluthnewstribune.com
  3. News
    U of M Duluth chemical explosion prompts evacuation, 1 person injured (Fox 9)
    fox9.com
  4. News
    One person injured, UMD building and two others evacuated after chemical explosion (WDIO)
    wdio.com
  5. News
    Chemical Explosion at UMD, Campus Buildings Now Safe to Enter (Fox 21 Online)
    fox21online.com
  6. News
    1 injured in chemical explosion at UMD (KSTP)
    kstp.com
  7. Source
    UMD SAFE-U Alert -- building evacuations lifted (UMN Duluth official Facebook, Alert #4)
    facebook.com
Tags
hazmatchemical-spilllab-explosionminnesotapublic-r2evacuationshared-ventilationnitric-acid
Added May 2026Updated May 2026Via ingestion