DIVISION OF OCCUPATIONAL SAFETY AND HEALTH
POLICY AND PROCEDURES MANUAL
Crystalline Silica Inspection Guidelines
with emphasis on exposure to concrete and masonry dust in construction per 8 CCR section 1530.1
Issue Date: 4/23/09
AUTHORITY: California Labor Code Sections 6300 et seq and Title 8, California Code of Regulations (CCR) Sections 1513,1530, 1530.1, 1538, 5141, 5143, 5144, 5155, and 5194
POLICY: It is the policy of the Division of Occupational Safety and Health to implement an emphasis program and uniformly conduct inspections to identify and reduce or eliminate the health hazards associated with occupational exposure to crystalline silica.
The purpose of this document is to implement in California procedures for DOSH personnel to focus attention on potentially hazardous exposures to crystalline silica in the course of enforcement activities. Particular emphasis will be given to enforcement of the standard for control of dust exposures from work on concrete and masonry materials in construction (Title 8, section 1530.1).
The procedures below are intended to serve as the California response to and incorporation of the Federal OSHA National Emphasis Program for Crystalline Silica detailed in CPL 03-00-007 http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=DIRECTIVES&p_id=3790
As noted in the OSHA CPL (pg A-4) excessive exposure to crystalline silica is recognized to be the cause of pulmonary silicosis. In addition, there is evidence that it may be associated with the following serious diseases: lung cancer, tuberculosis, chronic obstructive pulmonary disease (COPD), immunologic disorders, renal disease, and stomach and other cancers. Because of the seriousness of these conditions, and the potential for excessive exposures in a wide range of industries, it is important that workplace operations which can cause exposure be recognized and evaluated by the Division in the course of enforcement inspections, and appropriate steps taken to develop evidence to sustain citations for violative conditions observed and obtain abatement of violations and hazardous levels of exposure.
Inspection procedures for the Title 8 1530.1 emphasis program
The particular operations within these industries which would generally be subject to the provisions of section 1530.1 for use of dust control systems, and which are the focus of this emphasis program include:
Note: as specified in section 1530.1, the following operations are exempted and should be covered under the other part of the SEP:
Also, dust reduction systems are not required by section 1530.1 for the following:
|Exception No. 1:||A dust-reduction system is not required if the operation, without considering any protection provided by personal protective equipment, does not result in employee exposure exceeding the Permissible Exposure Limits for applicable particulates listed in Section 5155 including, but not limited to, crystalline silica, as demonstrated reliably by air sampling data applicable to the specific operation being performed.|
|Exception No. 2:||A dust reduction system is not required for rooftop operations with roofing tile, roofing pavers, or similar materials.|
|Exception No. 3:||During the first 24 hours of an operation undertaken in response to an emergency, a dust reduction system is not required where it can reasonably be demonstrated or foreseen that use of a dust reduction system will materially impair the timely progress of the operation. For the purposes of this exception, "emergency" means an unexpected occurrence requiring immediate action to prevent or mitigate loss of, or damage to, life, health, property, or essential public services. "Emergency" includes, but is not limited to, a fire, flood, earthquake or other soil or geologic movement, structural collapse, damage to a subsurface installation, terrorist act, or sabotage.|
Section 1530.1 and directly related inspection elements
Title 8 Section 1530.1 is a new regulation requiring, with certain stated exceptions, use of dust control systems employing water or local exhaust ventilation whenever cutting, grinding, coring or drilling is performed on concrete or masonry materials. The requirement is not limited to only those operations which have been shown to exceed an applicable particulate PEL. Rather the requirement applies to all such operations, subject to a number of specific exceptions including where the employer can show by reliable air sampling data that the operation will not result in exceedance of an applicable particulate PEL.
The emphasis program will focus on enforcing this new requirement, and directly related requirements for control of exposures to airborne contaminants through the following:
Inspection of roofing operations
In section 1530.1, there is an exception to the requirement for use of dust control systems during rooftop operations, i.e. cutting, grinding, coring and drilling of concrete or masonry material actually conducted on rooftops (not just on the ground for an adjacent roofing operation). This exception was made not because it was believed there is no risk, for example, from exposure to dust from cutting of roofing tiles and similar material, but rather because of concern with safety issues from falls in use of local exhaust ventilation or water in rooftop operations.
It is important to note that rooftop operations covered by 1530.1 are still covered by the training requirements of the new standard.
CSHO’s shall evaluate roofing operations for conduct of work of the type covered by section 1530.1. Where such work is conducted on the rooftop it is to be evaluated under the previously existing requirements for control of dust exposure in sections 5141, 5145, and 5155 and will generally require a showing of PEL exceedance to sustain a citation other than for section 5155(e) for failure to monitor the operation.
In roofing operations, CSHOs shall be mindful of use of dry sweeping and compressed air to clean cuttings dust off of roofs and to include these elements of the work in air sampling.
Inspection of workplaces and operations not covered by section 1530.1
When an inspection is conducted in a situation not covered by section 1530.1 but believed to have potential for significant dust exposure, Division staff shall be mindful of, and where appropriate inquire of the employer as to, work activities which could give rise to harmful exposures to crystalline silica. Control of silica exposure would be covered like other hazardous substances in sections 5141, 5144, 5145, and 5155 and will require air sampling and a showing of PEL exceedance.
Examples of specific operations that may not be covered by section 1530.1 but with potential for exposure to crystalline silica which, because of their sometime seasonal or intermittent nature, may not be immediately apparent in the course of inspection walk-throughs include:
Air Sampling Procedures
Air sampling for crystalline silica will be consistent with Chapter 1 of the DOSH Technical Manual. Collection of a bulk sample of settled dust for silica analysis will be consistent with Chapter 3 of the DOSH Technical Manual.
Title 8 section 5155 includes PELs for both total and respirable crystalline silica. It is important to collect a large enough air sample especially for respirable dust to enable determination of a result that is relevant to the PEL. When doing short term sampling or possibly collecting minimal concentrations of silica, contact the analytical lab for advice on using total, respirable or both sampling methods for silica dust. When possible collect two samples, one for total silica and one for respirable silica, to compare with both PELs.
Generally, analysis should always be requested for both quartz and cristobalite, and for additional specific crystalline silica species where they are known or suspected to be present. Check with our contract analytical lab for current recommendations. When using cyclones for respirable samples, check with Calico staff for current recommendations on types of cyclones, calibration and leak testing methods.
Referral Procedures for Air Sampling
CSHOs whose primary expertise is not industrial hygiene shall discuss with their district manager workplaces where they have identified potential for hazardous exposure to crystalline silica, based for example on first-hand observation of dusty operations involving mineral materials, or based upon information obtained from the employer, employees, or other credible sources of information. In such situations the district manager shall make appropriate assignments of staff with industrial hygiene expertise for further assessment.
Other related inspection elements for all industries covered and not covered by section 1530.1
Consistent with the OSHA National Emphasis Program document, in the course of inspections related to both section 1530.1 and other silica inspections, CSHO’s shall:
Title 8 Sections to keep in mind, including but not limited to:
Consideration should also be given to other possible violations related to operations inspected where applicable e.g. Noise, flying object protection, electrical safety (especially where water is used for dust reduction), machine guarding etc.
CSHO’s shall consider and provide for their personal safety and silica exposure minimization during air sampling and other inspection activities. CSHO’s should avoid entry into areas of dusty operations when possible, and when not possible to avoid they are expected to provide for their safety and set a proper example by wearing appropriate respirators, protective clothing, and other PPE (e.g. hearing protection). CSHOs whose primary expertise is not industrial hygiene shall consult with their district manager on appropriate protective equipment and its use.
IMIS Coding - Forms 1 and 1B
Form 1 - Inspection Report - Optional Information
Inspections conducted where we sample for crystalline silica, code S 06 CRYS SILICA
Form 1B - Violation Documentation - Substance Codes
If a citation is a result of sampling please enter the applicable substance code. Some examples of crys silica include:
(Note: There is a search feature (F7) on the substance code line 25 of the 1B data entry screen)
Cyclone maintenance and leak testing: Contact CALICO staff for parts, calibration, repair and assistance.
Air sampling and analysis: Contact analytical lab or senior health staff in your region or in the Research & Standards Health Unit.
Engineering controls for cutting and grinding of concrete or masonry material: Contact senior health staff in your region or in the Research & Standards Health Unit. Also see the NIOSH publications page for silica including control measures: http://www.cdc.gov/niosh/topics/silica/industry.html and the DOSH Silica Hazard Alert for Construction
Engineering controls for Granite countertop fabrication: Contact senior health staff in your region or in the Research & Standards Health Unit. Also see DOSH Hazard Alert: http://www.dir.ca.gov/dosh/dosh_publications/GraniteHazardAlert.doc