SAFETY--Storage, Transportation, Handling and Disposal of FORMALDEHYDE (FORMALIN) SOLUTION In Reply Refer To: Mail Stop 405 July 30, 1993 WATER RESOURCES DIVISION MEMORANDUM NO. 93.44 Subject: SAFETY--Storage, Transportation, Handling and Disposal of FORMALDEHYDE (FORMALIN) SOLUTION The purpose of this safety memorandum is to provide technical guidance in the handling, storage, transportation and disposal of the chemical formaldehyde (formalin) in solution, as provided under 29 CFR 1910.1048 and other applicable Federal and State regulations as amended. CHEMICAL CHARACTERISTICS: Formaldehyde is a colorless gas with a pungent, suffocating odor, most often used in aqueous solutions for purposes of preserving specimens. Formalin, the liquid formaldehyde solution used by the Water Resources Division, is a 30-50 percent formaldehyde by weight solution which can contain 10-15 percent methanol. Formalin, when exposed to air, will emit formaldehyde gas. Formaldehyde is a highly flammable liquid/gas and should be considered a fire hazard. It strongly oxidizes in the presence of alkalis, acids and phenols. HEALTH HAZARDS: Acute Effects A. Ingestion - concentrations greater than 10 percent causes severe irritation and inflammation of the mouth, throat, and stomach. Following ingestion, severe stomach pains, loss of consciousness and death can occur. B. Inhalation - highly irritating to the upper respiratory tract. Concentrations of .05 to 2.0 parts per million (p/m) may irritate mouth, eyes, nose and throat while 3 to 20 p/m can cause excessive tearing, difficulty in breathing and coughing that may be intolerable to some persons. At 25-30 p/m formaldehyde causes severe respiratory tract injury, pulmonary edema and pneumonitis. Formaldehyde is immediately dangerous to life and health at a concentration of 100 p/m. C. Dermal - Formalin is a severe skin irritant causing discoloration drying, cracking and scaling. Prolonged exposures can lead to numbness and hardening of skin, allergic eczematous dermatitis or hives. D. Eyes - Depending upon concentration, corneal clouding and loss of vision can occur. CHEMICAL CHARACTERISTICS: Chronic Effects A. Carcinogenicity - In humans, formaldehyde exposure has been associated with cancers of the lung, nasopharynx, oropharynx and nasal passages. Repeated and prolonged exposures increases risk. B. Mutagenicity - Formaldehyde is mutagenic in several in vitro test systems showing properties of both an initiator and a promoter. C. Toxicity - Prolonged or repeated exposure may result in respiratory impairment. Rats exposed to 2 p/m formaldehyde developed nasal tumors and change in cell structure of the nose while humans have been observed to have structural changes in the epithelial cells in the nose. Warning/Caution The perception of formaldehyde by odor and eye irritation becomes less sensitive with time and can lead to overexposure if workers are relying on formaldehyde's properties to alert them to potential danger. EXPOSURE LIMITS: The legal airborne permissible exposure limit (PEL) is 1 p/m in a 8-hour workday. Short-term exposure (15 minutes) is limited to 2 p/m while the action level for formaldehyde is 0.5 p/m. FIELD HANDLING AND USE: Transportation - Formaldehyde should be transported only in original container, fully labeled and stored properly within the vehicle to prevent shifting, spillage or breakage. Formaldehyde should never be opened, mixed or transferred to sample vials at any time inside a closed vehicle. A Materials Safety Data Sheet (MSDS) should be in the possession of the user and made available to those working with this chemical. Contingency Spills and Response - During operational use and/or during transportation where an accidental spill is likely to occur, each field unit should have as part of their required emergency equipment, sufficient absorbent material to handle small spills. Clean, 1 gallon plastic Nalgene containers with Teflon screw caps, or equivalent, clearly labeled, should be available for small spills and for transporting used formalin from the field to the laboratory for proper disposal. Care should be exercised during clean-up that no person becomes dermally exposed to formaldehyde. If, during the emergency, the spill occurs where there is insufficient ventilation to proceed with clean-up, the area should be vacated immediately and others should be prevented from entering the spill area unless properly suited and with a self- contained air supply. Proper authorities should be notified if the spill occurs on a roadway or has potential to do harm by entering a water supply or other bodies of water where there is a greater exposure potential to humans and/or an aquatic ecosystem. A record of how much of the chemical was spilled and the method of clean-up and proper disposal should be under- taken once the spill has been contained and dealt with, not during the emergency. If exposed to formaldehyde, flush exposed skin with copious amounts of water and remove contaminated clothing as quickly as possible to prevent continued exposure. PERSONAL PROTECTIVE EQUIPMENT: At all times, formaldehyde should only be handled, mixed or added to specimen containers with the upmost caution, in ventilated areas such as open air table if in the field and under an appropriate fume hood if in the laboratory. Formaldehyde should never be opened or mixed while inside a vehicle. If there is the possibility of splashing, a face shield should be worn while mixing or pouring formaldehyde. At all times, disposable gloves must be worn to prevent dermal exposure when handling and/or mixing this product. NEVER smoke or have an open flame while working with formaldehyde. STORAGE: Formaldehyde should be stored in a cool, dry, well-ventilated area and properly labeled. Formaldehyde should never be stored in vehicles except to transport to and from field during sampling operations. Used formaldehyde, either from spill clean-up or from activities generated from the process of change-out of sample containers must be stored in a properly labeled hazardous waste container and made available for recycling under Resources Conservation Recovery Act (RCRA) protocols. Storage of waste formaldehyde should be in an area not frequented by the general population or duty workers and should be in an area not subject to heat cycles and well ventilated. DISPOSAL: Spilled or used formaldehyde is considered a hazardous waste and must be handled as a solid waste under RCRA. The generator--be it in the field office or the district office--must contact a hazardous waste contractor for appropriate disposal under RCRA regulations. An Environmental protection Agency (EPA) identification number must be obtained for each site from which disposal of a regulated material or waste will be made. Instructions on how to obtain an EPA identification number were included in the "Hazardous Materials Assessment" document transmitted on May 14, 1993, by the Chief, Branch of Operational Support. Uniform Hazardous Waste Manifests (EPS form 8700-22) and records must be maintained on the amounts of waste formaldehyde, storage time, and the contractor involved in the hazardous waste recycling. William B. Mann IV Assistant Chief Hydrologist for Ops AUTHORITY 1. Section 19 of Occupational Safety and Health Act (OSHA) 1970 - Public Law 91-596. 2. Executive Order 12196, Occupational Safety and Health Programs for Federal Employees. REFERENCE REGULATIONS 1. 29 CFR 1910.1000 (OSHA) Toxic and Hazardous Substances 2. 29 CFR 1910.1048 (OSHA) Formaldehyde 3. 29 CFR 1910.1200 (OSHA) Hazard Communication 4. 29 CFR 1910.1048 (OSHA) Formaldehyde, Irritant and Potential Cancer Hazard 5. 29 CFR 1910.1450 (OSHA) Occupational Exposure to Hazardous Chemicals in Laboratories 6. 40 CFR 262 (EPA) Standards Applicable to Generators of Hazardous Wastes 7. 49 CFR 172.101 (DOT) Table of Hazardous Materials and Special Provisions This memorandum does not supersede any previous WRD Memorandum. Distribution: A,B,S,FO,PO Key Words: Hazardous Materials, Transportation, Chemical