OPPT_Carbon Tetrachloride_C. Engineering

Project ID

2553

Category

OPPT REs

Added on

March 8, 2017, 8:07 a.m.

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Technical Report

Health hazard evaluation report no. HETA 93-011-2309, Tri-county North School, Lewisburg, Ohio

Burr GA et al. 1993

Abstract  In response to a request from the superintendent of the Tri-County North school system (SIC-8211), Lewisburg, Ohio, an investigation was begun into possible airborne pollutants at that site. Employees had reported respiratory difficulty, impaired concentration, nausea, and severe headaches. The two story elementary/middle/high school was completed in 1990. Approximately 1,125 students, 70 teachers, and 20 nonteaching staff were located in the building. The school used 114 heat pumps, controlled by a central computer system, to condition the air in the school. Carbon-dioxide (124389) levels consistently exceeded 1000 parts per million (ppm) throughout the building. Temperature and humidity levels were within comfort requirements. Formaldehyde (50000) levels ranged from 0.02 to 0.04ppm. No evidence of microorganisms was found. Very low levels of volatile organic compounds were measured in classrooms. Decane (124185), used in photocopiers, was detected in several areas. The authors conclude that the amount of outside air supplied was below the ventilation design criteria for classrooms. The authors recommend that the amount of outside air be increased, emissions from photocopiers be controlled, and that the ventilation system be improved.

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