Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good Montana Mill Works Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good Contents Objectives........................................................................................................................................ 3 1 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good Agents of Interest ........................................................................................................................... 3 Facility and Operations Description ................................................................................................ 4 Employee Demographics ................................................................................................................ 4 Sampling Strategy ........................................................................................................................... 5 Sampling Methodology ................................................................................................................... 6 Results Interpretation ..................................................................................................................... 7 Recommendations and Conclusions ............................................................................................... 7 References ...................................................................................................................................... 7 2 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good Objectives The primary objective of the Montana Mill Works 2020 Exposure Monitoring Plan is to XXXX. Additional supporting objectives include XX, and developing future sampling strategies. Agents of Interest The agents of interest, and associated health effects, captured in this exposure monitoring plan are summarized in Table 1. Applications and process considerations are outlined in the Facility and Operations Description section of this plan. Additional physical hazards associated with the agents of interest include process related noise, XX. Metal Working Fluid (MWF) must be adequately maintained and replaced to prevent microbial growth, which can introduce biological contaminants of concern (“CDC - Metalworking Fluids - NIOSH Workplace Safety and Health Topic”, 2013). Table 1: Summary of Agents of Interest Agent Hexavalent Chromium (CrVI) • • • • • • Carbon Black 3 • • • OEL PEL: 0.005 mg/m3 AL: 0.0025 mg/m3 REL: 0.0002 mg/m3 REL-STEL: TLV: 0.0002 mg/m3 (I) TLV-STEL: 0.0005 mg/m3 (I) PEL: 3.5 mg/m3 REL: 3.5 mg/m3 TLV: 3 mg/m3 (I) Application Component in Paint used in Painting Area • Target Organs Respiratory System Lung and Sinonasal cancer Asthma • Respiratory System Component in Paint used in Painting Area • • 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good OEL: Occupational Exposure Limit REL: National Institute of Occupational Safety and Health (NIOSH) Time Weighted Average (TWA) Recommended Exposure Limit PEL: Occupational Safety and Health Administration (OSHA) TWA Permissible Exposure Limit STEL: Short Term Exposure Limit TLV: American Conference of Governmental Industrial Hygienists (ACGIH) TWA Threshold Limit Value R: Respirable fraction I: Inhalable fraction AL: OSHA Action Level XX system effects are associated with XX. Because the XX system is the target organ for all agents, consideration XXX. Facility and Operations Description The milling process is broken into XXX The milling facility also contains a break room and supervisors’ office on the processing floor. The managers’ office is located in a separate building area. The break room door is often left open, allowing the potential for contaminants to migrate into the space. Figure 1: Montana Mill Works Plant Layout, 2020 Employee Demographics The mill operates on three shifts with a total of 4 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good . The total number of employees and respective job titles are presented in Table 2. Table 2: Number of Employees at Montana Mill Works by Process Step and Shift 1st Shift 2nd Shift 3rd Shift Process Step (0800-1630) (1600-0030) (0000-0830) Machine Area 1 Machine Area 2 Hand Finishing Painting Maintenance Supervisor Manager Sampling Strategy Prior to the collection of quantitative exposure monitoring data, qualitative industrial hygiene risk assessments including XXX Employees of Montana Mill Works will be broken into Similar Exposure Groups (SEGs) based on the job tasks assigned and agents of concern. The sampling strategy for each SEG is outlined in Table 3. Table 3: Overview of 2020 Exposure Monitoring Plan Sampling Strategy by SEG SEG Machine Area Operators Hand Finishing Painting Maintenance Supervision Number of Employees Number of Samples* Task Descriptions & Sampling Considerations Agent(s) of Concern • • TBD TBD *Number of samples based on XXXXX NA: Not Applicable. Quantitative monitoring will not be captured during this monitoring event TBD: To Be Determined. Specific agents of concern have not been identified. Qualitative evaluation of job tasks, controls, and potential exposures must be completed prior to quantitative sampling 5 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good This sampling strategy will focus on the three main production steps, additional monitoring will be performed based on qualitative exposure assessment. A total of XX personal breathing zone air samples will be collected during this exposure monitoring event. Sampling Methodology Sampling methodology is based on the applicable analytical method. The methodology for each agent of concern including applicable SEG, required sampling equipment, flow rates, sample duration and area, and reference method are presented in Table 4. Flow rate and sample duration were calculated to ensure compliance with the flow rate and volumes specified in the applicable method. A total of XX blanks will be submitted for laboratory analysis for each agent of interest. Table 4: Sampling Methodology for the Montana Mill Works 2020 Exposure Monitoring Plan Agent of Interest SEG Hexavalent Chromium (air) Painting Hexavalent Chromium (wipe) Painting/ Facility Wide Painting Carbon Black Equipment Needed • NaOH coated binderless quartz filter • Sampling Pump • 37mm PVC filter Flow rate 2 L/min Sample Duration 240 min NA • 2 L/min Sample area: 100 cm2 240 min • Tared 5µm PVC membrane Sampling pump Analytical Method Mod. OSHA ID-215 Mod. OSHA W4001 Mod. NIOSH 5000 *Aluminum is not listed in NIOSH method 9102 however, confirmation has been received from Galson Laboratory (American Industrial Hygiene Association (AIHA) accredited) for analysis PTFE: Polytetrafluoroethylene MCE: Mixed Cellulose Ester Membrane NaOH: Sodium hydroxide PVC: Polyvinyl Chloride 6 2/24/2020 Homework 5: Exposure Monitoring Plan IH5286: Sampling and Evaluation of Health Hazards Student B Good Results Interpretation Results of personal breathing zone samples will be compared to XX. An exposure rating will be applied XX. Recommendations and Conclusions Based on the preliminary XX References 7 2/24/2020 Excellent 10 Report format and proper citation thoughout the document, proper captions and lables 10% Objective clearly stated as well as assumptions. Plan designed to meet objectives 5% SEG. Possible SEG identified, SEGs are logical based on assumptions or SEGs are not feasible based on assumptions 10% Health hazard evaluation. Agent, OELs , relevant physical properties, target organs, relevant GHS information summarized 20% Above Ave 9 Good 8 Below Ave 7 Fair 6 Poor 5 Sample No. Number of workers selected and method used to select the # of workers is clear. Number of samples per worker identified 20% Sample Period. Sample time determine using the method sample volume min and max. Sample time notes for each agent. Flow rate for each agent provided 20% Methods identified correctly. 5% Other concerns. Other possible hazards or concerns noted 5% Follow-on strategy Based on the findings, how will risk be determined 5% 10% deducted per day if late Industrial Hygiene Sampling Scenario – MT Mill Works Tasks • • Develop an exposure monitoring plan considering chemical and physical hazards o Define the objectives of the sampling strategy o Research hazardous materials ▪ Develop a health hazard evaluation o Develop your scope of work ▪ SEGs ▪ Sampling flow rate, sample time, number of media, expected sample volume, number of workers, number of samples per worker o Determine a strategy for follow-up based on the results using a risk rating Prepare a detailed sampling plan in a report format citing all references appropriately Assumptions: • • • You are a new hire at Montana Mill Works. The previous sampling data are vague and therefore you don’t feel confident using the past IH survey as a baseline. You do not have a strict budget, however, consider cost when you determine the sampling strategy. You can freely select employees Description: Major work areas on the shop floor • Machine area one • Machine area two • Hand finish area one • Painting • Supervisor Office Machine area one contains 4 (four) open bed SNK bridge mills. A large-scale bridge mill is seen in the video. A bridge mill shapes metal through a cutting process. Metal Working Fluids (MWF) is used to cool the cutting tool during milling. Disregard the individual components in the MWF when developing the sampling protocol. • Video of large-scale bridge mill https://www.youtube.com/watch?v=KIJpWjD_gWY Machine area one mills are similar to the machine seen in the previous video one but use Metal Working Fluids as seen in this video https://www.youtube.com/watch?v=r_2zbtLuHFo Because the mill bed is open, a fine mist of Metal Working Fluids is generated. The mist level changes with the cutting program. Rough in work (first cuts) tend to produce higher noise and more mist. Eleven people work in this area, four on first and second shift and two on third shift. The last worker fills in where need, primarily on day shift. Machine area two is the same as machine area one. The hand finishers wipe the parts down to remove the dust with isopropyl alcohol 99% throughout the process of removing burrs and imperfections from the machined part. The process of finishing the product is similar to the one seen in the video https://www.youtube.com/watch?v=LFcQubS_S-g. The hand finish work is preformed within an environmental booth (dust collection booth). http://www.hydrotron.net/products/booths/. The booth is a designated a hearing conservation zone. Aluminum metal dust is generated during the hand finish process. 12 hand finishers work days only. The painting occurs after the part is assembled. The painting is preformed with a small paint brush. The work is ‘touch up work’; paint is not sprayed. Fifteen workers are in this area all on day shift. They perform other tasks in addition to painting but paint every day. The painting task has an average duration of 4 hours. The area has dilution ventilation. The painters clean with a solvent, Methyl Ethyl Ketone. Disregard the painting process for this evaluation. Four maintenance personal work at the facility, two on days and one on both second and third shift. Each shift has a supervisor and a manager, supervisor offices are on the shop floor where as manager offices are not. Disregard their exposure for this survey. The lunch room is separated from the industrial area by a door that is often left open. All workers wear safety glasses, steel toed shoes and gloves. The gloves for the machinist are cut and fluid resistant. The gloves for the hand finishers are cut and flash resistant. Painters do not wear goves. o First shirt: 8AM-4:30PM; o Second shift: 4PM:12:30AM o Third shift: 12AM -8:30AM o 
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