School LaboratoryChemical Hygiene & Safety Plan

Presented by thePresented by the

Office of Environmental Health and SafetyOffice of Environmental Health and Safety

Los Angeles Unified School DistrictLos Angeles Unified School District

Chemical Hygiene and Safety Plan(CHSP)

• To comply with Title 8, California Code of Regulations (CCR), Section 5191

• To protect employees who work in laboratories from health hazards associated with hazardous chemicals

Definitions

• PEL: Permissible Exposure Limit. The highest concentration of a PEL: Permissible Exposure Limit. The highest concentration of a chemical that an individual can be exposed to, averaged over the chemical that an individual can be exposed to, averaged over the duration of an 8-hour work shift.duration of an 8-hour work shift.

• TLV: Threshold Limit Value. The highest concentration of a TLV: Threshold Limit Value. The highest concentration of a chemical that an individual can be exposed to at any time during chemical that an individual can be exposed to at any time during his/her work shift.his/her work shift.

• LD50: A measure of toxicity involving the use of laboratory animals LD50: A measure of toxicity involving the use of laboratory animals to determine the dose of a given chemical at which death will occur to determine the dose of a given chemical at which death will occur in half of the test population.in half of the test population.

• PPE: Personal Protective Equipment. Examples include respirators PPE: Personal Protective Equipment. Examples include respirators and air purifying cartridges, gloves, chemical splash goggles, and air purifying cartridges, gloves, chemical splash goggles, boots/shoe covers, and Tyvek coveralls.boots/shoe covers, and Tyvek coveralls.

Chemical Hygiene & Safety Plan Organization Chart

Principal/Site Administrator

Science TeacherPlant Manager

Chemical SafetyCoordinator

Office ofEnvironmental

Health and Safety

Responsibilities

Principal/Site Administrator• Ensure implementation of the Chemical Hygiene & Safety Plan in school

laboratories• Assign Chemical Safety Coordinator to train affected staff on CHSP

requirements

Chemical Safety Coordinators (CSCs)• Provide training to affected staff on CHSP and Hazard Communication

requirements• Perform health and safety inspections monthly• Conduct chemical inventory annually• Maintain Material Safety Data Sheets (MSDS)• Attend three training meetings per fiscal year• Arrange for removal of outdated chemicals• Maintain documents such as training sign-in sheets, chemical inventory,

CSC activity checklist and monthly inspection checklist

Responsibilities

Science Teachers• Plan and conduct each laboratory operation/activity in accordance with

the District’s CHSP• Maintain an annual inventory of laboratory chemicals and their MSDS• Provide regular chemical hygiene, safety and housekeeping

inspections• Observe proper chemical hygiene and safety work practices• Instruct students in safe work practices and procedures

Office of Environmental Health and Safety (OEHS)• Work with school principals, CSCs, and teachers to help implement

school chemical hygiene & safety plans• Provide training to CSCs• Provide technical assistance to schools and employees on the CHSP

Routes of Entry

There are three main routes by which chemical substances

can enter the body:• Inhalation by breathing dusts, fumes, mists or vapors• Ingestion by eating or drinking with contaminated hands

or in a contaminated laboratory• Absorption through the skin or eye by contact with liquid,

dusts, fumes, mists or vapors.

Requirements

• Develop and implement CHSP in school laboratories• Inform and train affected employees in: º Hazard recognition and classification º Standard operating procedures º Minimization and control of hazards by engineering and administrative controls º Proper labeling and disposal of hazardous materials and wastes º Recordkeeping requirements of chemical inventories

Hazard Recognition and Classification

• Physical Safety Hazards • Chemical Health Hazards• Chemical Classes and Their Effects

Physical Safety Hazards

• Compressed gas – High pressure gas or mixture of gases in the container• Combustible liquid – Flash point above 100º F but below 200º F• Explosive – A chemical that causes a sudden release of pressure, gas and heat• Flammable liquid – Flash point below 100º F• Flammable solid – Liable to cause fire through friction, absorption of moisture, or spontaneous change• Oxidizer – A chemical that initiates or promotes combustion in other materials• Reactive – A chemical that will vigorously polymerize, decompose, condense, or will become self-reactive under conditions of shock, pressure or temperature• Water-reactive – A chemical that reacts with water to release a gas that is either flammable or presents a health hazard

Chemical Health Hazards

• Carcinogen – A chemical that is capable of causing cancer

• Corrosive – A chemical that causes visible destruction of living

tissue by chemical action at the site of contact

• Toxic – A substance with the potential of having the effect of a

poison or something harmful to the body

• Irritant – A chemical that causes a reversible inflammatory

effect on living tissue, skin or eyes by chemical action

at the site of contact

• Sensitizer – A chemical that causes an allergic reaction in normal

tissue after repeated exposure to the chemical

Chemical Classes and Their Effects

• Acids – Corrosive to skin and mucous membranes• Alcohols – Blindness and central nervous system (CNS) depressants• Aldehydes and ketones – Irritate and have narcotic effects• Aliphatic – Central nervous system depressants and asphyxiants. Some are neurotoxins• Alkalies – Severe tissue burns and bronchial spasms• Asphyxiants – Reduces the oxygen carrying capacity of the blood or displaces atmospheric oxygen• Compounds of sulfur, – Corrosive to the skin and destructive to respiratory phosphorus, nitrogen tissues• Halogens – Corrosive and highly irritating to tissues • Metal fumes/vapors - Systemic poisoning

Standard Operating Procedures

• General safe work practices º Familiarize with the potential hazards of various chemical substances º Avoid unnecessary exposure to chemicals by any route º Wash areas of exposed skin before leaving the laboratory º Do not eat, drink, smoke , gum chew, or apply of cosmetics in laboratory º Do not keep food and drink in the laboratory º Do not use laboratory glassware or utensils for food or beverages º Do not allow practical jokes º Confine long hair and loose clothing º Avoid wearing open-toed shoes º Wear protective clothing and goggles º Do not work alone in the laboratory º Never leave an experiment unattended º Do not use mouth suction for piping or starting a siphon• Work safely with laboratory equipment and chemicals• Store chemicals properly• Warning signs and labels

Hazard Controls

• Minimize all chemical exposures• Engineering controls º General laboratory ventilation º Fume hoods• Personal protective equipment º Use appropriate PPE such as aprons, laboratory coats, laboratory aprons, gloves, goggles, face shields• Administrative controls º Use only those chemicals in quantities whose chemical concentrations can be controlled by the existing ventilation system º Order should not exceed what is expected to be used in one year

Handling of Chemicals

• Labeling1. Identity of contents.2. Date chemical was acquired3. Disposal date (for unstable chemicals).4. Responsible person.5. Hazardous characteristics.6. Other pertinent safety information.

• Storage 1. MSDS sheets must be available for all chemicals.2. All chemicals must be properly labeled and inventoried.3. Do not store chemicals on top of lab benches, out in open, or above eye label.4. Storage in hoods is not recommended.5. Keep incompatible chemicals separated.6. Flammables stored in flammable storage cabinet.7. All cabinets containing chemicals must be labeled.

DisposalAll hazardous waste containers must be properly labeled with the name and address of

the school, composition and physical state of the waste, and accumulation date.

Fill-out this form and fax to OEHS at (213) 241-6816

Spills

• Clean-up minor spills of diluted chemicals, nonvolatile or toxic using procedures listed on the MSDS

• Wear appropriate protective apparel such as gloves and aprons

• Evacuate the area if a volatile, flammable, toxic and/or concentrated material is spilled.

• Notify OEHS at (213) 241-3199 immediately.

Chemical Inventory Records

• An inventory of all chemicals stored in each school An inventory of all chemicals stored in each school

building shall be conducted annually and chemical building shall be conducted annually and chemical

usage determined. usage determined.

• Inventory information shall include the chemical name, Inventory information shall include the chemical name,

quantity, hazard information, and storage location.quantity, hazard information, and storage location.

• Inventory and chemical order records are to be Inventory and chemical order records are to be

maintained by the Chemical Safety Coordinator, Site maintained by the Chemical Safety Coordinator, Site

Administrator, or Science Chairperson, with a copy sent Administrator, or Science Chairperson, with a copy sent

to OEHS.to OEHS.

“ “ A commitment to purchase a A commitment to purchase a chemical is a commitment to chemical is a commitment to handle and store the chemical handle and store the chemical safely and to dispose of the safely and to dispose of the chemical in an environmentallychemical in an environmentallyacceptable fashion.”acceptable fashion.”

Chemical Safetywhat’s the big deal?