WAC 296-848-200 Basic Rules

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Your Responsibility

To measure and minimize employee exposure to inorganic arsenic.

IMPORTANT:

The sections listed in basic rules apply to all employers covered by the scope of this chapter, WAC 296-848-100. To find additional sections that may apply to you, go to the Scope, WAC 296-848-100, and follow Table 1.

WAC 296-848-20010    

Preventive practices

You must

1) Effectively communicate the hazards of inorganic arsenic by doing both of the following:

• Keep container labels free of statements that contradict or detract from the labels' hazard warning.

You must

• Make sure shipping containers, storage containers, and products containing inorganic arsenic are labeled, tagged, or marked with this warning:

You must

2) Establish safe and effective housekeeping and maintenance practices by doing all the following:

• Develop and keep a written housekeeping and maintenance plan that lists appropriate frequencies for:
  • - Housekeeping operations;
    and
  • - Cleaning and maintaining dust collection equipment.
• Keep surfaces free of accumulations of inorganic arsenic, to the degree feasible.
• When cleaning floors and other accessible surfaces:
  • - Use vacuuming or other cleaning methods that minimize the release of inorganic arsenic into the air.
  • - Don't use compressed air.
  • - Select vacuums that have high efficiency particulate air (HEPA) filters.
  • - Use and empty vacuums in a way that minimizes the release of inorganic arsenic back into the workplace.

You must

• Maintain ventilation systems, including dust collection equipment, to make sure they are effective. Do all of the following:
  • - Perform periodic inspections for effectiveness.
  • - Periodically clean the equipment.
  • - Keep a note of the most recent inspection for effectiveness, and
    cleaning or maintenance.

3) Prevent eye or skin contact with:

• Arsenic trichloride
  and
• Liquid or particulate forms of inorganic arsenic when contact could cause eye or skin irritation.

WAC 296-848-20025  

Washing facilities

You must

• Provide washing facilities for employees exposed to inorganic arsenic.

WAC 296-848-20060  

Exposure evaluations

IMPORTANT:

• This section applies when workplace operations create potential airborne exposure to inorganic arsenic.
• When you conduct an exposure evaluation in a workplace where an employee uses a respirator, the protection provided by the respirator isn't considered.
• Following this section will fulfill the requirements to identify and evaluate respiratory hazards found in chapter 296-841 WAC, Airborne contaminants.

You must

1) Conduct an employee exposure evaluation to accurately determine airborne concentrations of inorganic arsenic by completing Steps 1 through 5 of the Exposure Evaluation Process, each time any of the following apply:

• No evaluation has been conducted.
• Changes have occurred in any of the following areas that may result in new or increased exposures:
  • - Production
  • - Processes
  • - Exposure controls such as ventilation systems or work practices
  • - Personnel.
• You have any reason to suspect new or increased exposure may occur.

2) Provide affected employees and their designated representatives an opportunity to observe exposure monitoring during Step 4 of the Exposure Evaluation Process.

• Make sure observers don't interfere with exposure measurements.
• Make sure observers are entitled to:
  • - An explanation of your exposure measurement and monitoring procedures
  • - Observe all tasks of exposure measurement performed at the workplace
    and
  • - Receive a copy of the exposure measurement results when you obtain them or are allowed to record the exposure measurement results, if made during observations.
• Make sure observers who enter areas with inorganic arsenic exposure:
  • - Are provided with and use the same protective clothing, respirators, and other personal protective equipment (PPE) that employees working in the area are required to use
    and
  • - Follow safety and health requirements that apply.

   

Exposure Evaluation Process

IMPORTANT:

• Following the Exposure Evaluation Process isn't necessary when you have documentation conclusively demonstrating inorganic arsenic exposures for a particular operation and material, can't exceed the action level ( AL ) during any conditions reasonably anticipated.
• Documentation can be based on quantitative information such as soil test results or qualitative information such as observations of how inorganic arsenic-containing materials are handled.
  • - Retain this documentation for as long as you rely on it.

Step 1: Identify all employees who have potential airborne exposure to inorganic arsenic in your workplace.

Step 2: Select employees from those identified in Step 1 who will have their 8-hour exposures monitored.

• Make sure the exposures of the employees selected represent 8-hour exposures for all employees identified in Step 1, including each job classification, work area, and shift.

• Select and use a method that meets the following criteria for accuracy:
• - ±25%, with a confidence level of 95%, when concentrations are potentially at or above an 8-hour time-weighted average of 10 micrograms per cubic meter (Fg/m³);
  or
• - ±35%, with a confidence level of 95%, when concentrations are potentially between the eight-hour time-weighted averages of 5 µg/m³ and 10 µg/m³.

Step 4: Obtain employee exposure monitoring results by collecting air samples representing employees identified in Step 1.

• Sample at least one shift representative of the 8-hour exposure, for each employee selected in Step 2.
• Make sure samples are collected from each selected employee's breathing zone.

Step 5: Have the samples you collected analyzed to obtain monitoring results representing 8-hour exposures.

• Go to the Scope of this chapter, WAC 296-848-100, and compare employee exposure monitoring results to the values found in Step 1 and follow Step 2 to determine if additional sections of this chapter apply.

WAC 296-848-20070  

Notification

You must

• Provide written notification of exposure monitoring results, including notification about whether exposures exceed the permissible exposure limit (PEL), to employees represented by your exposure evaluation, within 5 business days after the monitoring results become known to you.
  • - In addition, when employee exposure monitoring results are above the permissible exposure limit (PEL), provide written notification of all the following within 15 business days after these exposure monitoring results become known to you.
    • Corrective actions being taken and a schedule for completion;
      and
    • Any reason why exposures can't be lowered to below the PEL.

Note: You can notify affected employees either individually or post the notifications in areas readily accessible to affected employees. When notifying employees about corrective actions, your notification may refer them to a separate document that's available and provides the required information.

WAC 296-848-20090  

Exposure records

You must

• Establish and keep complete and accurate records for all exposure monitoring conducted under this chapter. Make sure the record includes, at least:
  • - The name, Social Security number or other unique identifier, and job classification of the employee sampled and all other employees represented by the sampled employee.
  • - A description of the methods used to obtain exposure monitoring results and evidence of the method's accuracy.
  • - A description of the procedure used to obtain representative employee exposure monitoring results.
  • - The date, number, duration, location, and the result of each sample taken.
  • - Any environmental conditions that could affect exposure concentration measurements.

You must

• Keep exposure monitoring records for at least 30 years.