# Major tears to muscles, tendons, ligaments at Aberdeen Proving Ground
> OSHA SIR `2018077222` · 7/17/2018 · ABERDEEN PROVING GROUND, MARYLAND
## Severity
- **1 hospitalization**
- **Body part:** Upper extremities, unspecified
- **Nature of injury:** Major tears to muscles, tendons, ligaments
## Cause
- **Event:** Explosion of nonpressurized vapors, gases, or liquids
- **Source:** Multiple chemicals or chemical mixtures, n.e.c.
- **Secondary source:** Dioxane
## Employer
- **Name:** Aberdeen Proving Ground
- **Location:** 1119 Morgan Road, ABERDEEN PROVING GROUND, MARYLAND, 21005
- **NAICS:** 336999
- **Jurisdiction:** 0
## Narrative

An employee was mixing lithium aluminum hydride with dioxane when a reaction occurred, causing an explosion. He suffered a torn tendon in his upper extremities among other injuries.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*