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HomeMy WebLinkAboutDERR-2024-010979Wexpro Company 333 South State Street Salt Lake City, Utah 84111 United States August 19, 2024 BY EMAIL Robin Keeler Utah Department of Environmental Quality 195 North 1950 West Salt Lake City, UT 84114 RE: Wexpro Company: EPCRA Section 311 Notification Horseshoe Bend Natural Gas Field, LP Federal 23 Pad Dear Robin Keeler: In accordance with Section 311 of the Emergency Planning and Community Right-to-Know Act (EPCRA), Wexpro Company is submitting safety data sheets (SDSs) for storage of new chemicals at the LP Federal 23 Natural Gas Production Pad in quantities greater than the threshold planning quantity. The pad is located at the following GPS coordinates: 40.192635°, -109.514544°. The material referenced below will be included in the facility’s 2024 Tier II chemical inventory report submitted by March 1, 2025. Please note that effective June 1, 2024 Enbridge Holdings, Inc. purchased Wexpro Company from Dominion Energy. The Emergency Coordinator for the Horseshoe Bend natural gas field located in Uintah County, Utah is Chet Deru, who can be contacted at (307)-352-7950 or chet.deru@dominionenergy.com. Chemical CAS # EHS Storage Locations Amount Onsite Produced Water No CAS # No 3 - 400 bbl above ground steel tanks inside of steel containment 437,149 lbs Produced Hydrocarbons - Natural Gas Condensate 68919-39-1 No 2 – 400 bbl above ground steel tanks inside of steel containment 210,168 lbs Wexpro Company 333 South State Street Salt Lake City, Utah 84111 United States Utah Department of Environmental Quality August 19, 2024 Page 2 If you have any questions or require additional information, please contact me at (307) 371-0966 or adam.r.plonsky@dominionenergy.com Sincerely, Adam Plonsky Environmental Compliance Manager cc: BY EMAIL Utah Department of Environmental Quality Mr. Tom Daniels; tdaniels@utah.gov Uintah County LEPC: Heidi Lundberg; hlundberg@uintah.utah.gov Uintah Fire District: Jeremy Raymond; Uintahfire@ubtanet.com Enclosures: Produced Water SDS Produced Hydrocarbons – Natural Gas Condensate SDS SAFETY DATA SHEET 1. Product and Company Identification Product Name: Produced Water Synonyms: Formation water, Brine UN Number: Not regulated Recommended Use: Process wastewater from natural gas well production Supplier Address: Dominion Energy Wexpro 333 South State Street P.O. Box 45433 Salt Lake City, UT 84145-0433 801-324-5111 Chemical Emergency Phone No.: 801-324-5111 2. Hazards Identification Produced water is a complex mixture of water and mineral salts (sodium chloride, calcium chloride, magnesium chloride, bicarbonate), the composition of which varies depending upon the formation. Produced water may contain hydrocarbons or natural gas condensate as a surface layer. Natural gas condensate is a flammable liquid and contains benzene. EMERGENCY OVERVIEW DANGER! CONTAINS BENZENE – A KNOWN HUMAN CARCINOGEN CONTAINS n-HEXANE – A REPRODUCTIVE TOXICANT MAY CONTAIN FLAMMABLE LIQUIDS Health Hazard Classification Carcinogenicity – Category 1A Reproductive Toxicity – Category 2 Physical Hazard Classification Flammable Liquids – Category 0 Potential Health Effects Primary Route of Exposure: Inhalation, skin contact Inhalation: May cause irritation to the nose and throat. Eye Contact: Contact with the eyes may cause irritation. Skin Contact: May cause irritation or reddening with prolonged exposure. May be absorbed through the skin and cause systemic toxicity with prolonged or repeated contact. Ingestion: May cause pulmonary edema or pneumonitis upon aspiration. Chronic Effects: Contains benzene, a human carcinogen. Prolonged exposure to benzene is associated with aplastic anemia and myeloid leukemia. Contains n-hexane, a reproductive toxicant. Aggravated Medical Conditions: Blood chemistry disorders September 2019 Page 1 of 7 SAFETY DATA SHEET 3. Composition/Information on Ingredients CHEMICAL CAS NO. VOLUME % Water Mixture 95 – 99% Natural Gas Condensate 68919-39-1 1 - 5 Mineral Salts Mixture 1 - 2 Benzene 71-43-2 < 1 4. First-aid Measures Inhalation: If inhaled remove affected person to fresh air, first ensuring your own safety. If experiencing breathing difficulty administer oxygen. If not breathing, administer CPR or artificial respiration. Seek medical attention immediately. Ingestion: If swallowed, DO NOT INDUCE VOMITING. If the victim is conscious, administer water by mouth. Call a physician or poison control center immediately. Eye Contact: In the case of eye contact, rinse the eyes with plenty of running water for at least 15 minutes. Obtain medical assistance. Skin Contact: Remove contaminated clothing, wash skin with plenty of running water. Obtain medical assistance if irritation persists. 5. Fire-fighting Measurements Flammable Properties: Fire is associated with flammable liquids and vapors at the surface of produced water. Suitable Extinguishing Media: Flame can be extinguished with dry chemical, CO2 or foam. Explosion Hazards: Vapors are heavier than air and may travel to a source of ignition and flash back. Vapors may ignite explosively. Liquid may float and ignite on the surface of water. Hazardous Combustion Products: Irritating gases of oxides of carbon including carbon dioxide and carbon monoxide. Special PPE & Precautions for Fire-fighters: Evacuate the area and fight the fire from a safe distance. Water may be ineffective to extinguish the fire, but should be used to keep surroundings and containers cool. If a leak or spill has not ignited, use water spray to disperse the vapors and to protect personnel attempting to stop a leak. Water spray may be used to flush spills away from areas of potential ignition. Divert run-off water away from sewers and waterways. Wear approved respiratory equipment and full protective equipment as indicated for fighting fire. September 2019 Page 2 of 7 SAFETY DATA SHEET 6. Accidental Release Measures Personal Precautions: All sparks, flames and sources of ignition must be restricted from the area, ventilate if indoors by opening doors and windows. Evacuate and clear a safe area. Wear self-contained breathing apparatus and protective clothing where warranted. Review Section 5, Fire-fighting Measures, before proceeding with containment and cleanup procedures. Environmental Precautions: Avoid washing, draining, or directing material into sewers and drainage. Containment and Cleanup: Contain spills immediately in the smallest possible area. Recover as much of the product as possible by such methods as vacuuming and return liquid to an appropriate container. Soak up residual liquid by using absorbent materials such as vermiculite, sand or clay and placing in a container along with other contaminated material, soils or debris for ultimate disposal. 7. Handling and Storage Safe Handling: Prevent eye and skin contact; do not breathe the mist or vapors. Wash hands after handling. Use in a well-ventilated area. Ground and bond all lines, containers and equipment used to prevent static sparks. Do not weld, cut, or grind on containers which have been emptied; flammable vapors and residues may remain. Safe Storage: Store in approved, labeled containers in a ventilated area; ensure containers are tightly closed. Keep containers away from flame, sparks and excessive temperatures. Keep away from incompatible chemicals including strong oxidizers. Comply with all federal, state and local regulatory requirements for handling, storage, transfer and disposal of flammable liquids. 8. Exposure Controls/Personal Protection CHEMICAL OCCUPATIONAL EXPOSURE LIMIT (OEL)1 OSHA ACGIH NIOSH Natural Gas Condensate None Established 300 ppm 500 ppm (STEL) App. A3, Confirmed Animal Carcinogen (As Gasoline)2 App. A, Potential Human Carcinogen (As Gasoline)2 n-Hexane 500 ppm 50 ppm (skin) 50 ppm 1100 ppm IDLH Benzene 1 ppm 5 ppm STEL 0.5 ppm (skin) 2.5 ppm STEL 0.1 ppm 1 ppm STEL 500 ppm IDLH September 2019 Page 3 of 7 SAFETY DATA SHEET 1OELs are 8-hour time weighted average exposure levels unless otherwise indicated as IDLH (Immediately Dangerous to Life and Health), STEL (15 minute Short Term Exposure Limit or Ceiling Limit), C (Ceiling Limit) or Peak (maximum ten minute concentration above the Ceiling Limit). Limits with a “skin” notation indicate that the substance can be absorbed through the skin. 2OEL is for Gasoline, CAS 86290-81-5. Personal Protective Measures and Controls Eye Protection: Avoid eye contact. Chemical goggles or face shield if there is a potential for sprays, mists or splashes. Skin and Body protection: Avoid skin contact. Wear chemical protective gloves. Consult manufacturer for glove specifications. Where splashing is possible, wear protective coveralls. Remove immediately if contaminated and launder before re-use. Respiratory Protection: Where necessary to maintain exposure levels below the Occupational Exposure Limits in Section 8, select appropriate NIOSH approved respiratory protection. Proper respirator selection should be determined by adequately trained personnel, and based on the contaminant(s), the potential exposure, and the published respirator protection factor. Hygiene measures: Observe good hygiene practices. Wash after handling the material, and before eating, drinking or smoking. Wear clean protective clothing; contaminated clothing should be promptly removed for laundering or replacement. Engineering and Ventilation Controls: Where applicable, adequate general or local exhaust ventilation should be used to maintain airborne concentrations below occupational exposure levels, to prevent the formation of explosive atmospheric concentrations, and to prevent the displacement of oxygen in confined areas. 9. Physical and Chemical Properties Appearance & Odor: Colorless liquid with a petroleum odor. Flash Point: Variable (Depending upon hydrocarbon content) pH: 5.2 – 8.2 Boiling Point: 212o F (water) Flammability Limits in Air: Not applicable Vapor Density: > 1 Specific Gravity: 1 – 1.04 (water = 1) Solubility in Water: Soluble with the exception of any hydrocarbon content Percent Volatile by Volume: Minimal Vapor Pressure: Not done September 2019 Page 4 of 7 SAFETY DATA SHEET 10. Stability and Reactivity Stability: Stable under normal storage and handling conditions. Conditions to Avoid and Incompatible Products: Strong oxidizers, sources of heat or ignition. Hazardous Decomposition Products; Incomplete combustion may release carbon monoxide, carbon dioxide and smoke (non-combusted hydrocarbons). Hazardous Polymerization: None. 11. Toxicological Information INHALATION ORAL/INGESTION EYE SKIN REPRODUCTIVE n-Hexane Human TCLo 190 ppm/8W (PNS) Rat oral LD50 28,710 mg/kg Rabbit - Irritation Inh Rat TCLo 10,000 pp,/17 H reproductive Inh Rat TCLo 5000 ppm Teratogenic Benzene Human TC 150 ppm/15M/8Y I (carcinogenic and blood effects) Human oral LDLo 50 mg/kg Rabbit 2 mg/24 H Severe Rabbit 15 mg/24H mild Human 10 mg/m3/11Y I Summary Comments: Acute: When hydrocarbons are present, mildly toxic and narcotic by inhalation or skin absorption; may cause irritation to the respiratory tract and cardiac arrhythmia. Liquid may be irritating to the skin. If ingested, aspiration causes severe lung irritation, coughing and pulmonary edema. Chronic: Exposure to aliphatic compounds may cause peripheral neuropathy. Chronic exposure to aromatic hydrocarbons may cause leukemia (benzene), aplastic anemia (benzene), and dysfunction of the kidney and liver. 12. Ecological Information Ecotoxicity: Mixture is harmful to aquatic organisms; the median threshold limit (TLm) is less than 100 ppm. Persistence and degradability: Mixture is expected to degrade naturally. Bioaccumulation potential: None. Mobility: The mixture will float on water with loss to air through volatilization, may foul shorelines. In soil, the mixture is expected to passively volatilize in air. September 2019 Page 5 of 7 SAFETY DATA SHEET 13. Disposal Considerations Waste Classification If disposed of in a container, may be defined as a RCRA hazardous waste by the characteristic, “ignitability” (D001) and benzene (D018) if hydrocarbons are present. Refer to Sections 7 and 8 for the safe handling and storage precautions. All disposal activities must comply with federal, state, and local regulations. 14. Transport Information Not considered a hazardous substance under D.O.T. unless a significant amount of hydrocarbon is present. UN Number: Not applicable UN Proper Shipping Name: Not applicable Hazard Class: Not applicable DOT Shipping Label Not applicable Emergency Response Guide Number: Not applicable 15. Regulatory Information United States Regulations: CERCLA Hazardous Substance List (40 CFR 302.): Benzene (CAS 71-43-2): RQ 10 lbs. SARA Title III, Section 311: Acute: Yes Chronic: Yes Fire: Yes Pressure: No Reactive: No CWA, Section 311: Benzene TSCA: None DOT: 49 CFR Parts 191-192 OSHA 29 CFR 1910.1028, Benzene 16. Other Information NFPA: Health Hazard 2 Fire Hazard 1 Instability 0 Special Hazard HMIS: Health Hazard 2 Flammability 1 Physical Hazard 0 Personal Protection Date of Issue: July 2017 Abbreviations and Acronyms: ACGIH American Conference of Governmental Industrial Hygienists CERCLA Comprehensive Environmental Response, Compensation, & Liability Act DOT U.S. Department of Transportation HMIS Hazardous Materials Information System IARC International Agency for Research on Cancer IDLH Immediately Dangerous to Life September 2019 Page 6 of 7 SAFETY DATA SHEET NIOSH National Institute of Occupational Safety and Health NFPA National Fire Protection Association OSHA Occupational Safety and Health Administration ppm parts per million SARA Superfund Amendments & Reauthorization Act STEL Short Term Exposure Limit (typically a 15-minute time weighted average) TSCA Toxic Substances Control Act TWA Time Weighted Average (typically 8 hours) Disclaimer: While proper care has been taken in the preparation of this Safety Data Sheet, this information is provided without warranty. Each individual utilizing this document should make an independent determination of the methods to be used to protect the public, workers and the environment. September 2019 Page 7 of 7 P a g e | 1 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro 1. Product and Company Identification Product Name: Natural Gas Condensate Synonyms: Casinghead Gasoline; Natural Gasoline UN Number: 1268 Recommended Use: Industrial Use Supplier Address: Dominion Energy Utah/Wyoming/Idaho Dominion Energy Wexpro 333 South State Street P.O. Box 45433 Salt Lake City, UT 84145-0433 801-324-5111 Chemical Emergency Phone No.: 1-801-324-5111 Health Hazard Classification Physical Hazard Classification Carcinogenicity – Category 1A Flammable Liquids – Category 1 Reproductive Toxicity – Category 2 Acute Toxicity (inhalation) – Category 1 Environmental Hazard Classification Acute Toxicity (oral) – Category 2 Hazardous to aquatic environment, long term Skin Irritation – Category 2 hazard – Category 2 Aspiration – Category 1 Specific target organ toxicity: • Single exposure – Category 3, narcotic effects • Repeated exposure – Category 1, hematopoietic system • Repeated exposure – Category 2, CNS 2. Hazards Identification EMERGENCY OVERVIEW DANGER! EXTREMELY FLAMMABLE LIQUID AND VAPOR – MAY CAUSE FLASH FIRE OR EXPLOSION CONTAINS BENZENE – A KNOWN HUMAN CARCINOGEN MAY BE HARMFULL OR FATAL IF INHALED, SWALLOWED OR ABSORBED THROUGH THE SKIN – MAY BE ASPIRATED INTO THE LUNGS IF SWALLOWED MAY CAUSE EYE AND SKIN IRRITATION TOXIC TO AQUATIC LIFE WITH LONG LASTING EFFECTS P a g e | 2 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro Potential Health Effects Primary Route of Exposure: Inhalation, skin contact Inhalation: Irritating to the eyes, nose and throat and narcotic at high concentrations. May act as a simple asphyxiant. Inhalation of high concentration can cause dizziness, headache, difficulty breathing and loss of consciousness. Inhalation of the concentrated vapor may cause pulmonary edema. Eye Contact: Contact with the eyes may cause irritation. Skin Contact: May cause irritation, reddening and blistering with prolonged exposure. May be absorbed through the skin. Ingestion: Moderately toxic by ingestion, may cause depression, headache, nausea, vomiting and swelling of the abdomen. May cause pulmonary edema or pneumonitis upon aspiration. Chronic Effects: Long term misuse may cause motor neuropathy and cardiac arrhythmia. Contains benzene, a human carcinogen (Group 1, IARC). Prolonged exposure to benzene is associated with aplastic anemia and myeloid leukemia. Aggravated Medical Conditions: Respiratory disorders; blood chemistry disorders; skin disorders. 3. Composition/Information on Ingredients Natural gas condensate is a complex mixture of volatile hydrocarbons, the composition of which varies depending upon the source and/or processing of natural gas. Typically, the hydrocarbons range from C3 to C10, with aromatic compounds including benzene, toluene, and xylenes. CHEMICAL CAS NO. VOLUME % Natural Gas Condensate 68919-39-1 100 Methane 74-82-8 0 – 2.5 P a g e | 3 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro Ethane 74-84-0 0 – 3.5 Propane 74-98-6 0.1 – 3.5 Butanes (n-, & iso-) 106-97-8; 78-28-5 2.0 – 5.5 Pentanes (n-, & iso-) 109-66-0; 78-78-4 3.0 – 11.5 n-Hexane 110-54-3 1.5 – 7.5 Hexane isomers Mixture 3 - 11 Heptane isomers Mixture 15.3 – 33.5 Octane isomers Mixture 15.4 - 20 C9 to C10 Hydrocarbons Mixture 15.5 - 45 Benzene 71-43-2 0.5 - 2 Ethylbenzene 100-41-4 0.6 – 0.7 Toluene 108-88-3 1.5 – 8.5 Xylene isomers 1330-20-7 1.5 – 11.5 4. First-aid Measures Inhalation: If inhaled remove affected person to fresh air, first ensuring your own safety. If experiencing breathing difficulty administer oxygen. If not breathing, administer CPR or artificial respiration. Seek medical attention immediately. Ingestion: If swallowed, DO NOT INDUCE VOMITING. If the victim is conscious, administer water by mouth. If vomiting occurs, keep head low to prevent stomach content from entering lung. Call a physician or poison control center immediately. Eye Contact: In the case of eye contact, open eyelids wide apart and rinse the eyes with plenty of running water for at least 15 minutes. Remove contact lenses if wearing. Obtain medical assistance. Skin Contact: General Information: Remove contaminated clothing, wash skin with plenty of running water and soap. Obtain medical assistance if irritation persists. If exposed or concerned, get medical attention or advice. Provide this safety data sheet (SDS) to the medical professional, and ensure they are P a g e | 4 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro aware of the precautionary measures to take to protect themselves. 5. Fire-fighting Measurements Flammable Properties: Flammable liquid. Suitable Extinguishing Media: Flame can be extinguished with dry chemical, CO2, foam or sand/earth. Explosion Hazards: Vapors are heavier than air and may travel to a source of ignition and flash back. Vapors may ignite explosively. Liquid may float and ignite on the surface of water. Hazardous Combustion Products: Irritating smokes and gases of oxides of carbon including carbon dioxide and carbon monoxide. Special PPE & Precautions for Fire-fighters: Evacuate the area and fight the fire from a safe distance. Water may be ineffective to extinguish the fire but should be used to keep surroundings and containers cool. If a leak or spill has not ignited, use water spray to disperse the vapors and to protect personnel attempting to stop a leak. Water spray may be used to flush spills away from areas of potential ignition. Divert run-off water away from sewers and waterways. Wear approved respiratory equipment and full protective equipment as indicated for fighting fire. 6. Accidental Release Measures Personal Precautions: All sparks, flames and sources of ignition must be restricted from the area, ventilate if indoors by opening doors and windows. Evacuate upwind and clear a safe area. Wear self-contained breathing apparatus and protective clothing where warranted. Review Section 5, Fire-fighting Measures, before proceeding with containment and cleanup procedures. Environmental Precautions: Avoid washing, draining, or directing material into sewers and drainage. Containment and Cleanup: Contain spills immediately in the smallest possible area. Recover as much of the product as possible by such methods as vacuuming and return liquid to an appropriate container. Soak up residual liquid by using absorbent materials such as vermiculite, sand or clay and placing in a container along with other contaminated material, soils, or debris for ultimate disposal. P a g e | 5 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro 7. Handling and Storage Safe Handling: Prevent eye and skin contact; do not breathe the mist or vapors. Wash hands after handling. Use in a well-ventilated area. Ground and bond all lines, containers and equipment used with natural gas condensate to prevent static sparks. Do not weld, cut, or grind on containers which have been emptied; flammable vapors and residues may remain. Safe Storage: Store in approved, labeled containers in a ventilated area; ensure containers are tightly closed. Keep containers away from flame, sparks, and excessive temperatures. Keep away from incompatible chemicals including strong oxidizers. Comply with all federal, state, and local regulatory requirements for handling, storage, transfer, and disposal of flammable liquids. 8. Exposure Controls/Personal Protection CHEMICAL OCCUPATIONAL EXPOSURE LIMIT (OEL)1 OSHA ACGIH NIOSH Methane Not applicable App F2, Minimal Oxygen Content Not applicable Ethane Not applicable App F2, Minimal Oxygen Content Not applicable Propane 1000 ppm App F2, Minimal Oxygen Content 1000 ppm TWA 2100 ppm IDLH Butanes (n-, & iso-) Not applicable 1000 ppm STEL 800 ppm4 TWA Pentanes (n-, & iso-) 1000 ppm5 1000 ppm 120 ppm5 610 ppm5 STEL 1500 ppm5 IDLH n-Hexane 500 ppm 50 ppm (skin) 50 ppm 1100 ppm IDLH Hexane isomers 500 ppm 1000 ppm STEL 100 ppm 510 ppm STEL Heptane isomers 500 ppm6 400 ppm 500 ppm STEL 85 ppm6 440 ppm6 STEL 750 ppm6 IDLH Octane isomers 500 ppm7 300 ppm 75 ppm7 385 ppm7 STEL 1000 ppm IDLH P a g e | 6 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro C9 – C10 Hydrocarbons 200 ppm8 200 ppm9 Benzene 1 ppm 5 ppm STEL 0.5 ppm (skin) 2.5 ppm STEL 0.1 ppm 1 ppm STEL 500 ppm IDLH Ethylbenzene 100 ppm 20 ppm 100 ppm 125 ppm STEL 800 ppm IDLH Toluene 200 ppm 300 ppm C 500 ppm Peak 20 ppm 100 ppm 150 STEL 500 ppm IDLH Xylenes 100 ppm 100 ppm 150 ppm STEL 100 ppm 150 STEL 900 ppm IDLH 1OELs are 8-hour time weighted average exposure levels unless otherwise indicated as IDLH (Immediately Dangerous to Life and Health), STEL (15-minute Short Term Exposure Limit or Ceiling Limit), C (Ceiling Limit) or Peak (maximum ten-minute concentration above the Ceiling Limit). Limits with a “skin” notation indicate that the substance can be absorbed through the skin. 2Simple asphyxiant notation in a minimal oxygen content atmosphere. 4A NIOSH REL of 800 ppm as a time weighted average exposure has been established for both butanes listed. 5OEL applies to n-Pentane. 6OEL applies to n-Heptane. 7OEL applies to n-Octane. 8OEL applies to all isomers of Nonane. 9OEL applies to n-Nonane. Personal Protective Measures and Controls Eye Protection: Hand Protection: Avoid eye contact. Chemical goggles or face shield if there is a potential for sprays, mists, or splashes. Wear appropriate chemical resistant gloves. Nitrile gloves are recommended – change frequently liquid may penetrate the glove. Consult manufacturer for glove specifications. Skin and Body protection: Avoid skin contact. Where splashing is possible, wear chemical coveralls, flame-retardant material is recommended. Remove immediately if contaminated and launder before re-use. Respiratory Protection: Where necessary to maintain exposure levels below the Occupational Exposure Limits in Section 8, select appropriate NIOSH approved respiratory protection. Proper respirator selection should be determined by adequately trained personnel, and based on the contaminant(s), the potential exposure, and the published P a g e | 7 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro respirator protection factor. Hygiene measures: Observe good hygiene practices. Wash after handling the material, and before eating, drinking, or smoking. Wear clean protective clothing; contaminated clothing should be promptly removed for laundering or replacement. Engineering and Ventilation Controls: Where applicable, adequate general or local exhaust ventilation should be used to maintain airborne concentrations below occupational exposure levels, to prevent the formation of explosive atmospheric concentrations, and to prevent the displacement of oxygen in confined areas. 9. Physical and Chemical Properties Appearance & Odor: Colorless liquid with a petroleum odor. Flash Point: As low as -50o F (-46o C) Boiling Point: 80o – 600o F (27o – 316o C) Flammability Limits in Air: LEL < 1 % UEL = 8.0 % Vapor Density: Liquid Density: > 1 ~ 6 lbs/gal Specific Gravity: 0.65 – 0.75 Solubility in Water: Insoluble Percent Volatile by Volume: Variable Vapor Pressure: 200 – 500 mmHg at 68o F (20o C) Autoignition Temperature As low as 450o F (232o C) 10. Stability and Reactivity Stability: Stable under normal storage and handling conditions. Conditions to Avoid and Incompatible Products: Strong oxidizers, sources of heat or ignition. Hazardous Decomposition Products; Incomplete combustion may release carbon monoxide, carbon dioxide and smoke (non- P a g e | 8 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro combusted hydrocarbons), and other toxic gases and vapors. Hazardous Polymerization: None. 11. Toxicological Information INHALATION ORAL/INGESTION EYE SKIN REPRODUCTIVE n-Butane Rat LC50 658 gm/m3/4H n-Pentane Rat LC50364 Mouse LD50IV 446 gm/m3/4H mg/kg Iso-Pentane Mouse LCLo 419 g/m3/2H n-Hexane Human TCLo 190 Rat oral LD50 28,710 Rabbit - Inh Rat TCLo ppm/8W (PNS) mg/kg Irritation 10,000 pp,/17 H reproductive Inh Rat TCLo 5000 ppm Teratogenic n-Heptane Human TCLo 1000 Mouse iv LD50 222 ppm/6M (CNS) mg/kg Octane Rat LC50 118 Mouse iv LDLo 428 g/m3/4H mg/kg Nonane Rat LC50 3200 Mouse iv LD50 218 ppm/4H mg/kg Benzene Human TC 150 Human oral LDLo Rabbit 2 Rabbit 15 ppm/15M/8Y I 50 mg/kg mg/24 H mg/24H (carcinogenic and Severe mild blood effects) Human 10 mg/m3/11Y I P a g e | 9 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro Ethylbenzene Rat LC50 13,367 ppm/2H & 4000 ppm/4H Rat LD50 4,769 mg/kg Human 1000 ppm mod LD50 Rabbit 15,433 mg/kg Toluene Human TCLo 100 ppm CNS Human LDLo 50 mg/kg Human 300 ppm Rabbit 435 mg Mild Xylenes TCLo 200 ppm Eye pulmonary LCLo 10,000 ppm/6H Human LDLo 50 mg/kg Human 200 ppm Rabbit 500 mg/24H mod Summary Comments: Acute: Mildly toxic and narcotic (dizziness, drowsiness, headache, nausea) by inhalation or skin absorption, may cause irritation to the respiratory tract and cardiac arrhythmia. Liquid is irritating to the skin and may cause blistering. If ingested, aspiration causes severe lung irritation, coughing and pulmonary edema. Continued inhalation may result in unconsciousness. Chronic: Exposure to aliphatic compounds may cause peripheral neuropathy. Chronic exposure to aromatic hydrocarbons may cause leukemia (benzene), aplastic anemia (benzene), and dysfunction of the kidney and liver. 12. Ecological Information Ecotoxicity: • Toluene – Acute • Toluene – Chronic • Xylenes Mixture is harmful to aquatic organisms; the median threshold limit (TLm) is less than 100 ppm. Crustacea (Daphnia magna) EC50 11.5 mg/l/48H Fish (Oncorhynchus kisutch) LC50 5.5 mg/l/96H Crustacea (Ceriodaphnia dubia) NOEC 0.74 mg/l/7D Fish (Oncorhynchus kisutch) NOEC 1.4 mg/l/40D Fish (Rainbow Trout) LC50 2/6 mg/l/96H Persistence and degradability: Mixture is expected to degrade naturally. Bioaccumulation potential: Partition coefficient n-octonol / water (log Kow): Has the potential to bioaccumulate. Benzene – 2.13 Toluene – 2.73 Xylenes – 3.12 – 3.2 Mobility: Other adverse effects: The mixture will float on water with loss to air through volatilization, may foul shorelines. In soil, the mixture is expected to passively volatilize in air. This product contains volatile organic which have a P a g e | 10 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro photochemical ozone creation potential. This product contains one or more substances identified as hazardous air pollutants (HAPs) 13. Disposal Considerations Waste Classification If disposed of in a container, may be defined as a RCRA hazardous waste by the characteristic, “ignitability” (D001) and benzene (D018). Refer to Sections 7 and 8 for the safe handling and storage precautions. All disposal activities must comply with federal, state, and local regulations. 14. Transport Information When shipping at a vapor pressure < 300 kPa (43.5 psia) at 50o C, the following shipping information applies: Special precautions for all users: DOT UN Number: Read safety instructions, SDS and emergency procedures before handling. UN1268 UN Proper Shipping Name: UN1268, Petroleum Products, n.o.s. (Complex mixture of aliphatic, aromatic, and cyclic hydrocarbons, RQ=111 lbs.), 3, PG I Hazard Class: 3 DOT Shipping Label FLAMMABLE LIQUID Emergency Response Guide Number: Marine Pollutant: IATA UN Number: UN Proper Shipping Name: Hazard Class: DOT Shipping Label: ERG Code: 128 Yes UN1268 UN1268, Petroleum Products, n.o.s. (Complex mixture of aliphatic, aromatic, and cyclic hydrocarbons), 3, PGI 3 3 3H 15. Regulatory Information United States Regulations: TSCA Section 12(b) Export Notification (40 CFR 707, Subpart D): CERCLA Hazardous Substance List (40 CFR 302.): SARA 304 Emergency release Not regulated Benzene (CAS 71-43-2): RQ 10 lbs. Toluene (CAS 108-88-3) – Listed Xylenes (CAS 1330-20-7) – Listed P a g e | 11 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro notification: SARA 302 Extremely hazardous substance: Not regulated Not regulated SARA Title III, Section 311/312: Acute: Chronic: Fire: Pressure: Reactive: Yes (skin, eye irritation, damage) Yes (germ cell mutagenicity, carcinogenicity, reproductive toxicity, specific organ toxicity) Yes No No SARA 313 (TRI reporting): Clean Air Act (CAA) 112 HAPs List: CAA 112(r) Accidental Release Prevention (40 CFR 68.130): Safe Drinking Water Act: DEA List 2, Essential Chemicals (21 CFR 1310.02(b) and 1310.04(f)(2): DEA List 1 & 2, Exempt Chemical Mixtures: DEA Exempt Chemical Mixtures: Benzene (CAS 71-43-2), 0.4-10 % by wt. Toluene ((CAS 108-88-3), 2-10 % by wt. Xylenes (CAS 1330-20-7), 1-10 % by wt. Benzene (CAS 71-43-2); Toluene (CAS 108-88-3): Xylene (CAS 1330-20-7) Not regulated. Not regulated. Toluene (CAS 108-88-3) – Chemical Code No. 6594 Toluene (CAS 108-88-3) – 35 % WV Toluene (CAS 108-88-3) – Chemical Code No. 594 DOT: 49 CFR Parts 191-192 OSHA: 29 CFR 1910.1028, Benzene 16. Other Information NFPA: Health Hazard 2 Fire Hazard 4 Instability 0 Special Hazard HMIS: Health Hazard 2 Flammability 4 Physical Hazard 0 Personal Protection Abbreviations and Acronyms: ACGIH American Conference of Governmental Industrial Hygienists CERCLA Comprehensive Environmental Response, Compensation, & Liability Act DEA DOT ERG Drug Enforcement Agency U.S. Department of Transportation Emergency Response Guide (DOT) HMIS Hazardous Materials Information System IARC IATA International Agency for Research on Cancer International Air Transportation Association P a g e | 12 Dominion Energy Utah/Wyoming/Idaho Safety Data Sheet February/2023 Dominion Energy Wexpro IDLH Immediately Dangerous to Life NIOSH National Institute of Occupational Safety and Health NFPA National Fire Protection Association OSHA Occupational Safety and Health Administration ppm parts per million SARA Superfund Amendments & Reauthorization Act STEL Short Term Exposure Limit (typically a 15-minute time weighted average) TSCA Toxic Substances Control Act TWA Time Weighted Average (typically 8 hours) Issuance Date: May 2013 Revision Date: February 2023 Version No.: 04 Disclaimer: While proper care has been taken in the preparation of this Safety Data Sheet, this information is provided without warranty. Each individual utilizing this document should make an independent determination of the methods to be used to protect the public, workers and the environment.