Unit 3 Scholarly Activity

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Columbia Southern University *

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6302

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Industrial Engineering

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Apr 3, 2024

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docx

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4

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Sampling Methods Thomas Rios Columbia Southern University OSH 6302 Advanced Industrial Hygiene Danielle Reid 9.30.2023
Now that I have completed my initial review of Acme Automotive Parts operations and safety data sheets(SDS), I have determined that I will be sampling for hazards in the welding area, paint area and the metal working fluids area as well as sampling for noise in different areas of the plant. In the welding area we will be sampling for Manganese fumes using the NIOSH 7302 method. The sampling media we will be using with the NIOSH 7302 method is a filter comprised of a mixed cellulose ester membrane(MCE) that is 37 mm in diameter and has a pore size of 0.8 um(NIOSH Manual of Analytical Methods, Fifth Edition). The flow rate we will be sampling at is 2 L/min after calibrating each personal sampling pump with a representative sampler connected to the pump. I feel collecting personal samples will give us more accurate data as to how much of this hazard the employees are exposed to compared to sampling an area. When using a flow rate of 4 L /min and using the equations below, we can calculate the required time for sampling PEL - 5mg/m3 Limit of Detection for Method - 0.02 μg Flow Rate - 4 L/min 5mg/m3 = (0.00002 mg)/[Volume required (L)](1 m3/1,000L) Volume required (L) = (0.00002 mg)/[(5 mg/m3)(1 m3/1,000L)] Volume required (L) = (0.00002 mg)/(0.005mg/L) Volume required (L) = 0.004(L) (0.004L)/(4L/min) =0.001min. 0.001 min With the use of capped digestion containers, the use of other acids such as perchloric acids in combination with nitric acid should be avoided as this combination could result in a violent reaction. There are no special requirements for shipping and storage. For the paint area, the hazard that has me concerned is Toluene which affects the central nervous system(OSHA.gov). We will be conducting personal sampling using the OSHA 111 method at a flow rate of 50 ml/min for a max time of 240 min. or less. Personal samples are taken with personal sampling pumps that have been calibrated with sampling devices attached. The personal samples are collected by drawing air with a personal pump as close to the workers breathing zone using glass tubes packed with two sections of coconut shell charcoal and analyzed by gas chromatography using a flame ionization detector. Personal samples are used to evaluate the hazard risk associated with personal
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