FHM TRAINING TOOLS This training presentation is part of FHM’s commitment to creating and keeping safe workplaces. Be sure to check out all the training programs that are specific to your industry. Methylene Chloride ►►► These materials have been developed based on applicable federal laws and regulations in place at the time the materials were created. The program is being provided for educational and informational purposes only and does not constitute and is not intended to provide OSHA compliance certification, regulatory compliance, a substitute for any "hands on“ training required by applicable laws and regulations, or other legal or professional advice or services. By accessing the materials, you assume all responsibility and risk arising from the use of the content contained therein. ©2010 Grainger Safety Services, Inc. Learning Objectives Objectives: ► Understand basics of methylene chloride ► Recognize exposure effects ► Understand control measures Agenda Agenda: ► Basic information ► OSHA requirements ► Medical surveillance ► Exposure control ►Section 1 Basic Information Methylene Chloride and Its Uses Methylene chloride: ► Also called dichloromethane ► Volatile and colorless ► Chloroform-like odor ► Used in various industrial processes Employee Exposure and Health Consequences Exposure information: ► Common exposure from inhalation and skin exposure ► Classified as a potential occupational carcinogen by OSHA ► Short-term exposures may cause confusion, light-headedness, nausea, vomiting and headaches ► Skin exposure may cause irritation or chemical burns Industries Covered OSHA’s standard covers: ► General industry ► Shipyard employment ► Construction Exposure Limits Permissible Exposure Limit (PEL): ► PEL of 25 parts methylene chloride per million parts (ppm) of air ► Eight-hour time-weighted average (TWA) ► Action level for airborne methylene chloride is 12.5 ppm ► Short-term exposure limit of 125ppm over 15 minutes Requirements for Regulated Areas Standard requirements: ► Established regulated area ► Regulated areas must be marked ► Multi-employer worksites keep all employers informed ► Supply of appropriate respiratory equipment Hazard Communication Requirements OSHA’s standard requires: ► Employers to inform employees ► Use of labels and material safety data sheets (MSDS) ► Informing of health hazards (cancer, cardiac effects, nervous system effects, and skin and eye irritation) ►Section 2 Exposure Monitoring Benefits Air sampling and monitoring allows: ► Better determine exposure ► Identify the source ► Select proper control methods Measuring Employee Exposures Measuring requires: ► Breathing zone air samples ► Eight-hour TWA ► Short-term 15 minutes exposure ► Employees sampled must have highest expected exposure Initial Exposure Monitoring Initial monitoring can be waived when: ► Objective data proves that methylene chloride levels can’t be released above PEL or STEL ► Employees are exposed for fewer than 30 days per year Requirements for Periodic Monitoring Monitoring requirements: ► Monitoring of all tasks with exposure levels above the action level ► Must monitor employees every three months ► Additional monitoring when workplace conditions change Requirements for Periodic Monitoring Further requirements: ► Notify employees of monitoring results ► Describe actions being taken to reduce exposures ► Allow affected employees to observe any monitoring ► Provide employees with appropriate protective equipment Summary of Monitoring Requirements Exposure Scenario Required Monitoring Activity Below the action level (12.5 ppm) and at or below the STEL (125 ppm) No eight-hour TWA or STEL monitoring required Below the action level (12.5 ppm) and above the STEL (125 ppm) No eight-hour TWA monitoring required; monitor STEL exposures every three months At or above the action level (12.5 ppm), at or below the PEL (25 ppm TWA), and at or below the STEL (125 ppm) Monitor eight-hour TWA exposures every six months At or above the action level (12.5 ppm), at or below the PEL (25 ppm TWA), and above the STEL (125 ppm) Monitor eight-hour TWA exposures every six months and monitor STEL exposures every three months Above the PEL (25 ppm TWA), and at or below the STEL (125 ppm) Monitor eight-hour exposures every three months Above the PEL (25 ppm TWA) and above the STEL (125 ppm) Monitor eight-hour TWA exposures and STEL exposures every three months ►Section 3 Medical Surveillance Employer Responsibility Employer is responsible for: ► Frequent medical exams ► Implementing medical surveillance program, unless: – Levels are only at action level 30 days or fewer a year – At PEL or STEL levels for fewer than 10 days a year Employer Responsibility Employers must provide medical surveillance: ► To any employee exposed above PEL or STEL ► All employees during an emergency ► At no cost to employee ► Without loss of pay ► At a reasonable time and place Requirements for Medical Surveillance Medical exams must include: ► Comprehensive medical and work history ► A physical exam ► Emergency exams available in emergency situations Information for Examiners Employer must provide examining physician: ► Copy of methylene chloride standard ► Description of employee’s duties ► Employee’s exposure level ► Description of personal protective equipment ► Information from previous medical surveillances Services Employers Must Arrange Employer must arrange for physician to provide: ► Written opinion regarding exam results ► Recommended limitations on exposure ► Statement about telling employee risk factors ► Statement that employee was informed of exam results ►Section 4 Control Measures How Control Measures Protect Employees Controls are used to reduce exposure: ► Must be used to reduce exposure to or below PEL and maintain these levels ► Exception when demonstrated that this is infeasible Engineering Controls Examples: ► Local exhaust ventilation ► General and special isolation devices ► Enclosures Work Practice Controls Examples: ► Keeping employee’s face out of the methylene vapor zone ► Prohibit employees from eating, drinking, smoking, taking medication, or applying cosmetics inside the work area Administrative Controls Examples: ► Scheduling operations with highest exposure risk ► Employee rotation Handling Methylene Chloride Leaks Provisions must be in place for: ► Containment ► Prompt cleaning ► Proper disposal When Respiratory Protection is Required Respirators are to be used when: ► Exposure is likely to exceed PEL and STEL ► Controls are being implemented or installed ► Controls are infeasible ► Controls are not sufficient ► During emergencies Selecting a Respirator Appropriate respiratory protection varies: ► Employers must chose atmosphere-supplying respirators approved by NIOSH ► Employers may provide gas masks for emergency escape ► Canisters must be replaced after each use Selecting a Respirator Respirator care: ► Must be fitted properly ► Employer must perform qualitative or quantitative tests ► Employees must wash faces and face pieces ► Malfunctioning respirators must be fixed before employee can return to regulated area Hygiene Facilities Employers Must Provide Employers must provide: ► Conveniently located washing facilities ► Eyewash facilities within the immediate work area Protective Clothing and Equipment Personal protective equipment: ► Employees must use protective clothing and equipment ► Employer must provide methylene chloride resistant clothing and equipment at no cost to employee Records Employers Must Keep Employer must establish and keep records of: ► All objective data ► Exposure monitoring ► Medical surveillance Objective Data Records Records must include: ► Methylene chloride-containing material in question ► Source of objective data ► Testing protocol and results ► Description of exempted operation ► Other data relevant to the operations Exposure Measurement Records Records must include: ► Date of measurement for each sample taken ► Monitored operation involving exposure ► Number, duration, and results of samples taken ► Type of personal protection equipment ► Name, social security number, job classification, and exposure monitoring data Medical Surveillance Records Records must include: ► Name, social security number, and description of duties ► Physician’s written medical opinions ► Employee medical conditions related to exposure Information and Training Employers Must Provide Employer must provide the following information: ► Requirements of the standard ► Quantity, location, manner of use, release, and storage of methylene chloride ► Where exposures may be above the eight-hour TWA PEL or STEL Information and Training Employers Must Provide The employer must: ► Retrain employees as needed ► When changes in workplace procedures could increase exposures ► Notify other employers about methylene chloride use Additional Information Sources of additional information: OSHA 3144-06-R, Methylene Chloride. NIOSH Criteria Documents: Criteria for a Recommended Standard: Occupational Exposure to Methylene Chloride. DHHS (NIOSH) Publication No. 76-138 (March 1976).