Silica in spanish

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# Silica, quartz (cont.) ## What are fire hazards and extinguishing media for silica? (cont.) Suitable Extinguishing Media: Not combustible. Use an extinguishing agent suitable for surrounding fire. Specific Hazards Arising from the Chemical: None known. Not known to generate any hazardous decomposition products in a fire. ## What are the stability and reactivity hazards of silica? - Chemical Stability: Normally stable. - Conditions to Avoid: Generation of dust. - Incompatible Materials: Increased risk of fire and explosion on contact with: oxidizing agents (e.g. peroxides). Not corrosive to metals. - Hazardous Decomposition Products: None known. - Possibility of Hazardous Reactions: None known. ## What are unintentional release measures for silica? Personal Precautions: Evacuate the area immediately. Isolate the hazard area. Keep out unnecessary and unprotected personnel. Ventilate area. Methods for Containment and Clean-up: Avoid dry sweeping. If necessary, use a dust suppressant such as water. Do not use compressed air for clean-up. Collect using a shovel/scoop or approved HEPA vacuum and place in a suitable container for disposal. ## What handling and storage practices should be used when working with silica? Handling: Before handling, it is important that all engineering controls are operating and that protective equipment requirements and personal hygiene measures are being followed. Only trained personnel should work with this product. Immediately report leaks, spills or failures of the safety equipment (e.g. ventilation system). Avoid generating dusts. Prevent unintentional contact with incompatible chemicals. Storage: Keep the amount in storage to a minimum. Empty containers may contain hazardous residue. Store separately. Keep closed. Store in an area that is: separate from incompatible materials. Silica, quartz CCOHS

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# Occupational Safety and Health Administration (cont.) meter of air (25 µg/m³) as an 8-hour time-weighted average (TWA) under any foreseeable conditions. 1910.1053(a)(3). This section does not apply if the employer complies with 29 CFR 1926.1153 and: 1910.1053(a)(3)(i) The task performed is indistinguishable from a construction task listed on Table 1 in paragraph (c) of 29 CFR 1926.1153; and 1910.1053(a)(3)(ii) The task will not be performed regularly in the same environment and conditions. - 1910.1053(b) - Definitions. For the purposes of this section the following definitions apply: Action level means a concentration of airborne respirable crystalline silica of 25 µg/m³, calculated as an 8-hour TWA. Assistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. Department of Labor, or designee. Director means the Director of the National Institute for Occupational Safety and Health (NIOSH), U.S. Department of Health and Human Services, or designee. Employee exposure means the exposure to airborne respirable crystalline silica that would occur if the employee were not using a respirator. High-efficiency particulate air [HEPA] filter means a filter that is at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 micrometers in diameter. Objective data means information, such as air monitoring data from industry-wide surveys or calculations based on the composition of a substance, demonstrating employee exposure to respirable crystalline silica associated with a particular product or material or a specific process, task, or activity. The data must reflect workplace conditions closely resembling or with a higher exposure potential than the processes, types of material, control methods, work practices, and environmental conditions in the employer's current operations. Physician or other licensed health care professional [PLHCP] means an individual whose legally permitted scope of practice (i.e., …

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# Regulated areas- (cont.) ## Demarcation. (cont.) Provision of respirators. The employer shall provide each employee and the employee's designated representative entering a regulated area with an appropriate respirator in accordance with paragraph (g) of this section and shall require each employee and the employee's designated representative to use the respirator while in a regulated area. ## 1910.1053(f) Methods of compliance- ## 1910.1053(f)(1) Engineering and work practice controls. The employer shall use engineering and work practice controls to reduce and maintain employee exposure to respirable crystalline silica to or below the PEL, unless the employer can demonstrate that such controls are not feasible. Wherever such feasible engineering and work practice controls are not sufficient to reduce employee exposure to or below the PEL, the employer shall nonetheless use them to reduce employee exposure to the lowest feasible level and shall supplement them with the use of respiratory protection that complies with the requirements of paragraph (g) of this section. ## 1910.1053(f)(2) Written exposure control plan. ## 1910.1053(f)(2)(i). The employer shall establish and implement a written exposure control plan that contains at least the following elements: 1910.1053(f)(2)(iii). 1910.1053(f)(2)(i)(A) A description of the tasks in the workplace that involve exposure to respirable crystalline silica; 1910.1053(f)(2)(i)(B) A description of the engineering controls, work practices, and respiratory protection used to limit employee exposure to respirable crystalline silica for each task; and - 1910.1053(f)(2)(i)(C) A description of the housekeeping measures used to limit employee exposure to respirable crystalline silica. Submit Feedback

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# Any recommended limitations on the employee's use of respirators; (cont.) ## (!!)(L)(!)ESOT'0T6I (cont.) Hazard communication. The employer shall include respirable crystalline silica in the program established to comply with the hazard communication standard (HCS) (29 CFR 1910.1200). The employer shall ensure that each employee has access to labels on containers of crystalline silica and safety data sheets, and is trained in accordance with the provisions of HCS and paragraph (j)(3) of this section. The employer shall ensure that at least the following hazards are addressed: Cancer, lung effects, immune system effects, and kidney effects. 1910.1053(j)(2) Signs. The employer shall post signs at all entrances to regulated areas that bear the following legend: DANGER RESPIRABLE CRYSTALLINE SILICA MAY CAUSE CANCER CAUSES DAMAGE TO LUNGS WEAR RESPIRATORY PROTECTION IN THIS AREA AUTHORIZED PERSONNEL ONLY 1910.1053(j)(3) Employee information and training. The employer shall ensure that each employee covered by this section can demonstrate knowledge and understanding of at least the following: - 1910.1053(j)(3)(i)(A) - The health hazards associated with exposure to respirable crystalline silica; 1910.1053(j)(3)(i)(B) Specific tasks in the workplace that could result in exposure to respirable crystalline silica; - Specific measures the employer has implemented to protect employees from exposure to respirable crystalline silica, including engineering controls, work practices, and respirators to be used; Submit Feedback

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# Occupational Safety and Health Administration (cont.) Regulated area means an area, demarcated by the employer, where an employee's exposure to airborne concentrations of respirable crystalline silica exceeds, or can reasonably be expected to exceed, the PEL. Respirable crystalline silica means quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particlesize-selective samplers specified in the International Organization for Standardization (ISO) 7708:1995: Air Quality-Particle Size Fraction Definitions for Health-Related Sampling. Specialist means an American Board Certified Specialist in Pulmonary Disease or an American Board Certified Specialist in Occupational Medicine. This section means this respirable crystalline silica standard, 29 CFR 1910.1053. ## 1910.1053(c) Permissible exposure limit (PEL). The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m³, calculated as an 8-hour TWA. ## 1910.1053(d) Exposure assessment.- (T)(P)ESOT'0161 General. The employer shall assess the exposure of each employee who is or may reasonably be expected to be exposed to respirable crystalline silica at or above the action level in accordance with either the performance option in paragraph (d)(2) or the scheduled monitoring option in paragraph (d)(3) of this section. ## 1910.1053(d)(2). Performance option. The employer shall assess the 8-hour TWA exposure for each employee on the basis of any combination of air monitoring data or objective data sufficient to accurately characterize employee exposures to respirable crystalline silica. ## 1910.1053(d)(3) Scheduled monitoring option. Submit Feedback

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# Regulated areas- (cont.) ## 1910.1053(g)(1) (cont.) During periods when the employee is in a regulated area. ## 1910.1053(g).(2). Respiratory protection program. Where respirator use is required by this section, the employer shall institute a respiratory protection program in accordance with 29 CFR 1910.134. ## 1910.1053(h) ## Housekeeping. ## 1910.1053(h)(1). The employer shall not allow dry sweeping or dry brushing where such activity could contribute to employee exposure to respirable crystalline silica unless wet sweeping, HEPA-filtered vacuuming or other methods that minimize the likelihood of exposure are not feasible. ## 1910.1053(h).(2). The employer shall not allow compressed air to be used to clean clothing or surfaces where such activity could contribute to employee exposure to respirable crystalline silica unless: 1910.1053(h)(2)(i) The compressed air is used in conjunction with a ventilation system that effectively captures the dust cloud created by the compressed air; or 1910.1053(h)(2)(ii) No alternative method is feasible. 1910.1053(i) Medical surveillance- 1910.1053(i)(1) General. ## 1910.1053(i)(1)(i) The employer shall make medical surveillance available at no cost to the employee, and at a reasonable time and place, for each employee who will be occupationally exposed to respirable crystalline silica at or above the action level for 30 or more days per year. 1910.1053(i)(1)(ii)

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# What is the American Conference of Governmental Industrial Hygienists (ACGIH®) recommended exposure limit for silica? ACGIH® TLV® - TWA: 0.025 mg/m³ A2 (respirable) Exposure Guideline Comments: TLV® = Threshold Limit Value. TWA = Time-Weighted Average. A2 = Suspected human carcinogen. Adapted from: 2025 TLVs® and BEls® - Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices. Cincinnati: American Conference of Governmental Industrial Hygienists (ACGIH) NOTE: In many (but not all) Canadian jurisdictions, the exposure limits are similar to the ACGIH® TLVs®. Since legislation varies by jurisdiction, contact your local jurisdiction for exact details. A list is available in the OSH Answers on Canadian Governmental Occupational Health & Safety Departments. A list of acts and regulations that cover exposure limits to chemical and biological agents is available on our website. Please note that while you can see the list of legislation for free, you will need a subscription to view the actual documentation. ## What are the engineering controls for silica? Engineering Controls: Use a local exhaust ventilation and enclosure, if necessary, to control the amount in the air. It may be necessary to use stringent control measures such as process enclosure to prevent product release into the workplace. ## What Personal Protective Equipment (PPE) is needed when working with silica? Eye/Face Protection: Safety goggles suitable for dust protection. Skin Protection: It is good practice to prevent skin contact. Respiratory Protection: Up to 0.5 mg/m³: (APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter; Any supplied air respirator operated in a continuous-flow mode. Up to 1.25 mg/m³: APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter; Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter. Up to 2.5 …