Chapter 5, Problem 5.29P

Interpretation Introduction

(a)

Interpretation:

Theaverage Benzene concentration $C_B\left(\text{ppm}\right)$ needs to be determined.

Concept introduction:

The ideal gas equation is represented as follows:

$\begin{array}{l}PV=nRT\\ or\\ n=\frac{PV}{RT}\end{array}$

Here,

$\begin{array}{l}\text{n=Number}\text{of}\text{moles}\\ \text{P=Pressure}\text{of}\text{gas}\\ \text{V=Volume}\text{of}\text{gas}\\ \text{T=Temperature}\\ \text{R=Universal}\text{gas}\text{constant}\end{array}$

Interpretation Introduction

(b)

Interpretation:

The Time-Weighted Average Exposure (TWA) of the worker needs to be determined.

Concept introduction:

The workers TWA $\left(T^{\prime }\right)$ is equal to the product of average concentration of Benzene and time period and then dividing by the total time shift. It is given as follows:

$T^{\prime }=\frac{C_{B}t+C_B{}^{\prime }{t}^{\prime }}{T}$

Interpretation Introduction

(c)

Interpretation:

The actions taken by the company to ensure that the workers get expose to the chemical in the recommended limits needs to be determined.

Concept introduction:

NIOSH means TheNational Institute for Occupational Safety and Health, OSHA means the Federal Occupational Safety and Health Administration.

NIOSH is an education and research institution while OSHA generates and applies regulations, NIOSH focuses on the safety in theoccupational scientific field.