California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 7 - General Industry Safety Orders › Group 16 - Control of Hazardous Substances › Article 109 - Hazardous Substances and Processes › Appendix A - Diacetyl Sampling and Analytical Protocol (Mandatory)

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
This appendix establishes requirements for sampling
						  protocols and the procedure for taking and analyzing air samples for diacetyl
						  including quality control procedures that must be implemented by the person
						  conducting the sampling and by the laboratories performing the analysis. All
						  employers who are required to conduct air monitoring under subsection (c) of
						  this section are required to utilize analytical laboratories that use this
						  procedure, or an equivalent method, for collecting and analyzing
						  samples.
(a) Sampling Protocols.
(1) Personal Samples
(A) 8-hour time-weighted average. Due to the limited
						  sampling time for the OSHA Method, eight-hour time-weighted average (TWA)
						  exposure estimates must be constructed for each employee. Collect sequential
						  samples as recommended by the OSHA Method or an equivalent method for periods
						  no longer than 180 minutes per sample to cover the full work-shift of the
						  employee. For an eight-hour work shift, this will include the collection of a
						  minimum of three dual-tube samples for each employee unless the full duration
						  of the employee's exposure to diacetyl or diacetyl-containing flavorings or
						  food products is less than the full work shift. Cleaning and sanitizing
						  activities must be sampled separately from production processes.
(B) Short-term exposure. Collect short term exposure
						  samples as recommended by the OSHA Method or an equivalent method, to represent
						  the highest likely potential 15 minute exposure(s) for each process. Examples
						  of activities that should be monitored for short term exposures include periods
						  of a process in which tanks or containers are opened, filled, unloaded or
						  cleaned; where process equipment is opened; and where diacetyl or
						  diacetyl-containing flavorings or food products are heated or sprayed.
(2) Monitoring for verification of enclosed processes
						  or to determine whether respirators need not be required in a regulated
						  area.
(A) Eight-hour TWA and short term exposure personal
						  samples, in accordance with section (a)(1), shall be collected for each shift
						  and each job classification for employees in the area where process vessels or
						  operations are located.
(B) Area samples shall also be collected by the
						  placement of samplers in the areas the program reviewer determines likely to
						  have the highest levels of airborne diacetyl. A minimum of four locations shall
						  be sampled for each process. The employer shall record the nature of and
						  location of the process being sampled, the location of the sampler, the time
						  and date of the sampling, the measured air concentration from the dual-tube
						  samples, the method RQL for the sample, and evidence of its accuracy, including
						  the ambient temperature and humidity.
(C) If any individual sample collected in the course of
						  testing to verify that a system is enclosed is determined to contain diacetyl
						  above the OSHA RQL, then the process shall not be deemed enclosed. If any
						  individual sample collected in the course of testing to determine if respirator
						  use must be required in a regulated area is determined to contain diacetyl
						  above the OSHA RQL, then respirator use shall be required in the regulated
						  area.
(3) This sampling protocol cannot be used as the sole
						  basis for respirator selection in a regulated area if diacetyl-containing
						  powders are used in the regulated area.
(b) Sampling Procedure.
(1) Samples shall be collected using a personal
						  sampling pump calibrated prior to and after each day of sampling, with a
						  representative sampling train attached between the pump and the calibration
						  device, to within ±5% of the recommended flow rate specified in the OSHA
						  Method or in the equivalent method selected. In the OSHA Method the tubes must
						  be wrapped in aluminum foil (or a special tube cover used) to protect the
						  sampling devices from light, especially sunlight, during sampling, storage and
						  handling.
(2) Review and follow the sampling procedures in the
						  OSHA Method or in the equivalent method selected. The sampling procedure shall
						  also include the following:
(A) Record sample air volumes (liters), sampling time
						  (minutes) and sampling rate (mL/min) for each sample, along with any potential
						  interference(s) on a sample summary form.
(B) Personal samples shall be taken in the "breathing
						  zone" of the employee (i.e., attached near the collar or lapel near the
						  worker's face). The sampler inlet shall be located outside of the respirator,
						  and outside of any personal protective equipment or clothing, and there shall
						  be no impediment to airflow into the sampler.
(C) Each set of samples taken will include 10% field
						  blanks or a minimum of one field blank, whichever is greater. These blanks must
						  come from the same lot as the tubes used for sample collection. Handle the
						  blank sample in the same manner as the other samples except draw no air through
						  it. A set consists of any sample or group of samples for which an evaluation
						  for this standard must be made. Any samples represented by a field blank having
						  an excess of the limit of detection (LOD) of the method being used shall be
						  rejected, and additional sampling conducted to represent that exposure.
(c) Analytical Procedures.
(1) All samples shall be analyzed by a laboratory
						  accredited in accordance with the program of the American Association for
						  Laboratory Accreditation, the American Industrial Hygiene Association (AIHA)
						  Laboratory Accreditation Programs, LLC or other International Laboratory
						  Accreditation Cooperation mutual recognition signatory.
(2) The laboratory shall analyze all samples using the
						  OSHA Method or an equivalent method.
(3) Each sampling tube shall be analyzed separately,
						  and the results recorded. For each sampling tube, the employer shall ensure
						  that the record includes the date, time, location and identity of the process
						  being sampled, the name and employee identifier of the employee being sampled,
						  the employee's job classification, the specific job duties of the employee, and
						  the mass collected from the tube. The records for each dual-tube sample shall
						  include the measured air concentration from the dual-tube samples, the method
						  RQL for the sample, field evidence of its accuracy, including ambient
						  temperature and humidity, and any comments from the analytical laboratory
						  pertaining to the accuracy of the sample. The record for short term exposure
						  samples shall also identify the specific activity being sampled.
(4) All laboratories as part of their accreditation
						  shall participate in an appropriate national sample testing scheme such as the
						  Proficiency Analytical Testing Program (PAT) for organics that is sponsored by
						  the AIHA.
1. New
						  Appendix A filed 11-2-2010; operative 12-2-2010 (Register 2010, No.
						  45).
2. Amendment of subsections (c)(1) and (c)(4) filed 7-1-2013;
						  operative 10-1-2013 (Register 2013, No. 27).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code.