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 110 - Regulated Carcinogens › Appendix A to Section 5204 - Methods of Sample Analysis (Mandatory)

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
This appendix specifies the procedures for analyzing
						  air samples for respirable crystalline silica, as well as the quality control
						  procedures that employers must ensure that laboratories use when performing an
						  analysis required under Section
						  5204 (d)(5).
						  Employers must ensure that such a laboratory:
1. Evaluates all samples using the procedures specified
						  in one of the following analytical methods: OSHA ID-142; NMAM 7500; NMAM 7602;
						  NMAM 7603; MSHA P-2; or MSHA P-7;
2. Is accredited to ANS/ISO/IEC Standard 17025:2005
						  with respect to crystalline silica analyses by a body that is compliant with
						  ISO/IEC Standard 17011:2004 for implementation of quality assessment
						  programs;
3. Uses the most current National Institute of
						  Standards and Technology (NIST) or NIST traceable standards for instrument
						  calibration or instrument calibration verification;
4. Implements an internal quality control (QC) program
						  that evaluates analytical uncertainty and provides employers with estimates of
						  sampling and analytical error;
5. Characterizes the sample material by identifying
						  polymorphs of respirable crystalline silica present, identifies the presence of
						  any interfering compounds that might affect the analysis, and makes any
						  corrections necessary in order to obtain accurate sample analysis; and
6. Analyzes quantitatively for crystalline silica only
						  after confirming that the sample matrix is free of uncorrectable analytical
						  interferences, corrects for analytical interferences, and uses a method that
						  meets the following performance specifications:
6.1
Each day that samples are
						  analyzed, performs instrument calibration checks with standards that bracket
						  the sample concentrations;
6.2
Uses five or more calibration
						  standard levels to prepare calibration curves and ensures that standards are
						  distributed through the calibration range in a manner that accurately reflects
						  the underlying calibration curve; and
6.3
Optimizes methods and instruments
						  to obtain a quantitative limit of detection that represents a value no higher
						  than 25 percent of the PEL based on sample air volume.
1. New
						  Appendix A filed 10-17-2016; operative 10-17-2016 pursuant to Labor Code
						  section
						  142.3.
						  Submitted to OAL for filing and printing only pursuant to Labor Code section
						  142.3(a)(3)
						  (Register 2016, No. 43).
Note: Authority cited: Sections
							 142.3,
							 9020,
							 9030 and
							 9040, Labor
							 Code. Reference: Sections
							 142.3,
							 9004(d),
							 9009,
							 9020,
							 9031 and
							 9040, Labor
							 Code.