# Multiple poisoning, toxic, noxious, or allergenic effects at AROCK Services, LLC
> OSHA SIR `2018089047` · 8/31/2018 · WILLISTON, NORTH DAKOTA
## Severity
- **1 hospitalization**
- **Body part:** BODY SYSTEMS
- **Nature of injury:** Multiple poisoning, toxic, noxious, or allergenic effects
## Cause
- **Event:** Inhalation of harmful substance-single episode
- **Source:** Hydrogen sulfide
## Employer
- **Name:** AROCK Services, LLC
- **Location:** NJOS 157 100 28A 33-1H, WILLISTON, NORTH DAKOTA, 58801
- **NAICS:** 213112
- **Jurisdiction:** 1
## Narrative

An employee of AROCK Services, LLC, was overexposed to hydrogen sulfide gas while changing a valve on a pumper unit. The employee experienced nausea and inflammation of the throat, requiring hospitalization.

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