Such exposure shall be compensated for by exposures to concentrations less than 10 ppm so that the cumulative exposure for the entire 8-hour work shift does not exceed a weighted average of 10 ppm. If a substance is preceded by S, an employer shall take the necessary precautions to prevent a person from absorbing a contaminant through his or her skin. R 325.51104 Computation formulae. T where the concentration remains constant. C is the concentration of a particular contaminant.
L is the exposure limit for that substance specified.
R 325.51105 Methods of compliance. To achieve compliance with the provisions of R 325.51103 and R 325.51104, administrative or engineering controls shall first be determined and implemented when feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in these rules. Any equipment and technical measures used for this purpose shall be approved for each particular use by a competent industrial hygienist or other technically qualified person. Stay of enforcement.