DERR-2025-006403

Wexpro Company
333 South State Street
Salt Lake City, Utah 84111
United States

August 29, 2025

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
Island Natural Gas Field, Island 203 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 Island 203 Natural Gas Production Pad in quantities greater than the
threshold planning quantity. The pad is located at the following GPS coordinates:
(39.971440°, -109.751658°). The materials referenced in the table below will be included in
the facility’s 2025 Tier II chemical inventory report submitted by March 1, 2026.
The Emergency Coordinator for the Island natural gas field located in Uintah County,
Utah is Chet Deru, who can be contacted at (307)-352-7950 or
[e-mail].

Chemical CAS # EHS Storage
Locations
WCW8975
COMBINATION
SI/FE
Methanol-67-56-1; Quaternary ammonium
compound-No CAS; Phosphonate salt-No CAS;
Sodium chloride-7647-14-5
No
330 gal Above
Ground Storage
Tanks
Wexpro Company
333 South State Street
Salt Lake City, Utah 84111
United States

August 29, 2025
Page 2

If you have any questions or require additional information, please contact Jace Capraro at
[phone] or [e-mail]

Sincerely,

Adam Plonsky
Environmental Compliance Manager

cc: BY EMAIL

Utah Department of Environmental Quality
Mr. Tom Daniels; [e-mail]

Uintah County LEPC:
Heidi Lundberg; [e-mail]

Uintah Fire District:
Jeremy Raymond; [e-mail]

Ute Tribe TERC
Felecia Cuch; [e-mail]

Enclosures: WCW8975 COMBINATION SI/FE - SDS

WCW8975 COMBINATION SI/FE
WCW8975
Special: Scale Inhibitor Iron Control.
Baker Petrolite
A Baker Hughes Company
12645 W. Airport Blvd.
Sugar Land, TX 77478
For Product Information/MSDSs Call: 800-231-3606
(8:00 a.m. - 5:00 p.m. cst, Monday - Friday) 281-276-5400
8/17/2010.
Material Safety Data Sheet
Product name
Supplier
Material Uses
Code
Validation date
Print date
In case of emergency
Product and company identification
Responsible name
:
:
:
:
:
:
:
:
1 .
8/17/2010.
Version :1
Global Regulatory Affairs - Telephone [phone] or 800-231-3606
CHEMTREC: 800-424-9300 (U.S. 24 hour)
Baker Petrolite: 800-231-3606
[phone]-5400
CANUTEC: 613-996-6666 (Canada 24 hours)
CHEMTREC Int'l 01-703-527-3887 (International 24 hour)
Dermal contact. Eye contact. Inhalation.
Emergency overview
Hazards identification
Routes of entry
Potential acute health effects
Can cause central nervous system (CNS) depression. Irritating to respiratory system.
Irritating to eyes.
Can cause central nervous system (CNS) depression. May cause blindness if
swallowed.
Moderately irritating to the skin.
Eyes
Skin
Inhalation
Ingestion
Physical state Liquid. [Clear.]
WARNING!
FLAMMABLE LIQUID AND VAPOR. INHALATION CAUSES HEADACHES,
DIZZINESS, DROWSINESS AND NAUSEA AND MAY LEAD TO
UNCONSCIOUSNESS. CAUSES RESPIRATORY TRACT AND EYE IRRITATION.
MAY CAUSE BLINDNESS IF SWALLOWED. MAY CAUSE SKIN IRRITATION.
PROLONGED OR REPEATED CONTACT MAY DRY SKIN AND CAUSE IRRITATION.
CONTAINS MATERIAL THAT MAY CAUSE TARGET ORGAN DAMAGE, BASED ON
ANIMAL DATA.
Keep away from heat, sparks and flame. Do not breathe vapor or mist. Avoid contact
with eyes, skin and clothing. Use only with adequate ventilation. Keep container tightly
closed and sealed until ready for use. Wash thoroughly after handling. Vapors may
form explosive mixtures with air. Vapors can travel to a source of ignition and flashback.
To avoid fire or explosion, dissipate static electricity during transfer by grounding and
bonding containers and equipment before transferring material.
:
:
:
:
:
:
:
Odor :Mild. [Slight]
OSHA/HCS status :This material is considered hazardous by the OSHA Hazard Communication Standard
(29 CFR 1910.1200).
2 .
Potential chronic health effects
Color :Colorless to yellow.
1/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Hazards identification2 .
See toxicological information (section 11)
Medical conditions
aggravated by over-
exposure
Pre-existing disorders involving any target organs mentioned in this MSDS as being at
risk may be aggravated by over-exposure to this product.
:
Chronic effects :Contains material that may cause target organ damage, based on animal data.
Prolonged or repeated contact can defat the skin and lead to irritation, cracking and/or
dermatitis.
Over-exposure signs/symptoms
Ingestion :None known.
Skin :irritation, redness, dryness, cracking
Eyes :pain or irritation, watering, redness
Inhalation :respiratory tract irritation, nausea or vomiting, coughing, headache, drowsiness/fatigue,
dizziness/vertigo, unconsciousness
Target organs :Contains material which may cause damage to the following organs: the nervous
system, gastrointestinal tract, upper respiratory tract, skin, central nervous system
(CNS), eye, lens or cornea.
Methanol 67-56-1 30 - 60
Quaternary ammonium compound Trade secret.5 - 10
Phosphonate salt Trade secret.5 - 10
Sodium chloride 7647-14-5 1 - 5
Composition/information on ingredients
Name CAS number % by weight
3 .
Wash out mouth with water. Do not induce vomiting unless directed to do so by medical
personnel. Never give anything by mouth to an unconscious person. Get medical
attention immediately.
Get medical attention immediately. Immediately flush eyes with plenty of water for at
least 15 minutes, occasionally lifting the upper and lower eyelids.
In case of contact, immediately flush skin with plenty of water for at least 15 minutes
while removing contaminated clothing and shoes. Wash clothing before reuse. Clean
shoes thoroughly before reuse. Get medical attention immediately.
Move exposed person to fresh air. If not breathing, if breathing is irregular or if
respiratory arrest occurs, provide artificial respiration or oxygen by trained personnel.
Loosen tight clothing such as a collar, tie, belt or waistband. Get medical attention
immediately.
First aid measures
Eye contact
Skin contact
Inhalation
Ingestion
:
:
:
:
4 .
Protection of first-aiders :No action shall be taken involving any personal risk or without suitable training. If it is
suspected that fumes are still present, the rescuer should wear an appropriate mask or
self-contained breathing apparatus. It may be dangerous to the person providing aid to
give mouth-to-mouth resuscitation.
Use dry chemical, CO2, water spray (fog) or foam.
Fire-fighting measures
Extinguishing media
Flammable liquid. In a fire or if heated, a pressure increase will occur and the container
may burst, with the risk of a subsequent explosion. The vapor/gas is heavier than air
and will spread along the ground. Vapors may accumulate in low or confined areas or
travel a considerable distance to a source of ignition and flash back. Runoff to sewer
may create fire or explosion hazard.
5 .
Do not use water jet.
Suitable :
Not suitable :
Flammability of the product :
2/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Fire-fighting measures5 .
Promptly isolate the scene by removing all persons from the vicinity of the incident if
there is a fire. No action shall be taken involving any personal risk or without suitable
training. Move containers from fire area if this can be done without risk. Use water
spray to keep fire-exposed containers cool.
Special protective
equipment for fire-fighters
Fire-fighters should wear appropriate protective equipment and self-contained breathing
apparatus (SCBA) with a full face-piece operated in positive pressure mode.
:
Special exposure hazards :
Hazardous thermal
decomposition products
:carbon dioxide,carbon monoxide,nitrogen oxides,phosphorus oxides,halogenated
compounds,metal oxide/oxides
No action shall be taken involving any personal risk or without suitable training.
Evacuate surrounding areas. Keep unnecessary and unprotected personnel from
entering. Do not touch or walk through spilled material. Shut off all ignition sources. No
flares, smoking or flames in hazard area. Do not breathe vapor or mist. Provide
adequate ventilation. Wear appropriate respirator when ventilation is inadequate. Put
on appropriate personal protective equipment (see section 8).
Stop leak if without risk. Move containers from spill area. Approach release from
upwind. Dike spill area and do not allow product to reach sewage system or surface or
ground water. Notify any reportable spill to authorities. (See section 12 for environmental
risks and 13 for disposal information.) Contain and collect spillage with non-
combustible, absorbent material e.g. sand, earth, vermiculite or diatomaceous earth and
place in container for disposal according to local regulations (see section 13). Use
spark-proof tools and explosion-proof equipment. Dispose of via a licensed waste
disposal contractor. Contaminated absorbent material may pose the same hazard as
the spilled product. Note: see section 1 for emergency contact information and section
13 for waste disposal.
Environmental precautions
Accidental release measures
:Avoid dispersal of spilled material and runoff and contact with soil, waterways, drains
and sewers.
Personal precautions :
Large spill :
6 .
Stop leak if without risk. Move containers from spill area. Absorb with an inert material.
Use spark-proof tools and explosion-proof equipment. Dispose of via a licensed waste
disposal contractor.
Small spill :
Methods for cleaning up
If RQ (Reportable Quantity) is exceeded, report to National Spill Response Office at 1-800-424-8802.
Store in accordance with local regulations. Store in a segregated and approved area.
Store in a dry, cool and well-ventilated area, away from incompatible materials (see
section 10). Eliminate all ignition sources. Separate from oxidizing materials. Keep
container tightly closed and sealed until ready for use. Containers that have been
opened must be carefully resealed and kept upright to prevent leakage. Do not store in
unlabeled containers. Use appropriate containment to avoid environmental
contamination.
Put on appropriate personal protective equipment (see section 8). Eating, drinking and
smoking should be prohibited in areas where this material is handled, stored and
processed. Workers should wash hands and face before eating, drinking and smoking.
Do not breathe vapor or mist. Do not ingest. Avoid contact with eyes, skin and clothing.
Use only with adequate ventilation. Store and use away from heat, sparks, open flame
or any other ignition source. Use explosion-proof electrical (ventilating, lighting and
material handling) equipment. Use non-sparking tools. Take precautionary measures
against electrostatic discharges. To avoid fire or explosion, dissipate static electricity
during transfer by grounding and bonding containers and equipment before transferring
material. Empty containers retain product residue and can be hazardous. Do not reuse
container.
Handling and storage
Handling
Storage
:
:
7 .
3/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Exposure controls/personal protection
If a risk assessment indicates it is necessary, use a properly fitted supplied air respirator
complying with an approved standard. Respirator selection must be based on known or
anticipated exposure levels, the hazards of the product and the safe working limits of the
selected respirator.
Wear chemical safety goggles. When transferring material wear face-shield in addition to
chemical safety goggles.
Wear long sleeves and other protective clothing to prevent repeated or prolonged skin
contact.
Personal protection
Eyes
Skin
Respiratory
Consult local authorities for acceptable exposure limits.
:
:
:
Chemical-resistant gloves: Nitrile or Neoprene gloves. 4H gloves. Butyl rubber gloves.Hands :
8 .
Engineering measures :Use only with adequate ventilation. Use process enclosures, local exhaust ventilation or
other engineering controls to keep worker exposure to airborne contaminants below any
recommended or statutory limits. Use explosion-proof ventilation equipment.
Hygiene measures :Wash hands, forearms and face thoroughly after handling chemical products, before
eating, smoking and using the lavatory and at the end of the working period. Ensure that
eyewash stations and safety showers are close to the workstation location. Take off
contaminated clothing and wash before re-use.
Recommended monitoring
procedures
:If this product contains ingredients with exposure limits, personal, workplace atmosphere
or biological monitoring may be required to determine the effectiveness of the ventilation
or other control measures and/or the necessity to use respiratory protective equipment.
Only components of this product with established exposure limits appear in the box above.
Occupational exposure limits
Ingredients:List name ppm mg/m³Other ppm mg/m³Other ppm mg/m³Other Notations
Methanol US ACGIH 200 262 -250 328 ----[1]
OSHA PEL 200 260 -------
OSHA PEL 1989 200 260 -250 325 ----[1]
TWA (8 hours)STEL (15 mins)Ceiling
[1]Absorbed through skin.
If OSHA permissible exposure levels are shown above they are the OSHA 1989 levels or are from subsequent
OSHA regulatory actions. Although the 1989 levels have been vacated the 11th Circuit Court of Appeals, Baker
Hughes recommends that these lower exposure levels be observed as reasonable worker protection.
Not available.
Liquid. [Clear.]
5.1
Not available.
0.9879 (15.6°C)
>1 [Air = 1]
Neat - without dilution.
Not available.
Mild. [Slight]
Colorless to yellow.
Boiling/condensation point
Melting/freezing point
Not available.
Physical and chemical properties
Physical state
pH
Relative density
Vapor density
Odor threshold
Evaporation rate
Odor
Color
:
:
:
:
:
:
:
:
:
:
Flash point :Closed cup: 26°C (78.8°F) [SFCC]
Not available.:Auto-ignition temperature
Flammable limits :Not available.
9 .
:
Initial Boiling Point :Not available.
8.2292 (lbs/gal):Density
4/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Physical and chemical properties9 .
Soluble
Dynamic (15.6°C): 65.5 cPViscosity
Solubility (Water)
Not available.VOC :
:
:
Vapor pressure :Not applicable.
<-42.8°C (<-45°F)Pour Point :
Not available.:Partition coefficient
(LogKow)
The product is stable.
Under normal conditions of storage and use, hazardous polymerization will not occur.
Under normal conditions of storage and use, hazardous decomposition products should
not be produced.
Avoid all possible sources of ignition (spark or flame). Do not pressurize, cut, weld,
braze, solder, drill, grind or expose containers to heat or sources of ignition. Do not
allow vapor to accumulate in low or confined areas.
Stability and Reactivity
Chemical stability
Conditions to avoid
Materials to avoid
Hazardous decomposition
products
Hazardous polymerization
:
:
:
:
:
10 .
Highly flammable in the presence of the following materials or conditions: open flames,
sparks and static discharge and heat.
Conditions of reactivity :
Possibility of hazardous
reactions
:Under normal conditions of storage and use, hazardous reactions will not occur.
Reactive or incompatible with the following materials: oxidizing materials and reducing
materials.
Methanol is incompatible and may react with acetyl bromide, alkyl aluminum solutions,
beryllium hydride, boron trichloride, nitric acid, cyanuric chloride, dichloromethane,
diethylzinc, metals (granulated forms of aluminum and magnesium – including aluminum
and zinc salts), phosphorus III oxide, and potassium tert-butoxide.
Toxicological information11 .
Acute toxicity
Methanol LD50 Dermal Rabbit 15800 mg/kg -
LD50 Oral Rabbit 14200 mg/kg -
LD50 Oral Rat 5600 mg/kg -
LC50 Inhalation
Gas.
Rat 64000 ppm 4 hours
LC50 Inhalation
Vapor
Mouse 50000 ppm 4 hours
Sodium chloride LD50 Dermal Rabbit >10000 mg/kg -
LD50 Oral Rat 3000 mg/kg -
LC50 Inhalation
Dusts and mists
Rat 42000 mg/m³1 hours
Product/ingredient name Result Species Dose Exposure
1) Methanol
Methanol is a component of this product. Because methanol is eliminated from the body more slowly than ethanol, it can
have cumulative toxicity with repeated exposures (ACGIH, 1992).
Acute dermal, oral, and inhalation exposure to methanol can cause Central Nervous System effects, optic nerve effects,
diminished vision, and brain effects (necrosis and hemorrhaging). (Bennett, I.L. et al, 1953)
Ingestion of methanol can cause Central Nervous System depression, metabolic acidosis, blurred vision and blindness,
gastrointestinal effects, and coma and death. (Clayton, G.D. and Clayton, F.E., 1982, Patty’s Industrial Hygiene and
Toxicology, Vol2C) Dermal exposure to methanol can cause Central Nervous System depression, blurred vision, and
Chronic toxicity Remarks
5/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Toxicological information11 .
gastrointestinal effects. (Downie, A et al, 1992, Occupational Medicine, 42, pp 47-9) Chronic inhalation of methanol can
cause Central Nervous System depression, blurred vision, and gastrointestinal effects. (Frederick, L.J. et al, 1984, AIHA
Journal, 45, pp 51-5) Chronic inhalation of methanol has caused liver effects in laboratory animals. (Poon, R et al, 1994,
Toxocology and Industrial Health 10: 231-245) Chronic oral exposure has caused Central Nervous System effects and eye
effects in laboratory animals. [Youssef, A. F. et al (1993) Neurotoxicology and Teratology 15: 223-227; Baumbach, G.L. et
al (1977) Archives of Ophthalmology 95: 1859-1865; Hayreh, M.S. et al (1977) Archives of Ophthalmology 95: 1851-1858;
Hayreh, M.S. et al (1980) Ocular toxicity of methanol: An experimental study – Raven Press, New York, pages 35-53; and
Martin-Amat, G. et al (1977) Archives of Ophthalmology 95: 1847-1850]
Methanol has produced in vivo mutagenicity in animal studies. (Pereira, M.A. et al, 1982) and (Ward, J. B. et al, 1983)
Methanol was mutagenic in yeast (RTECS). Methanol has caused chromosome aberrations in yeast (RTECS) and
grasshoppers (Saha & Khudabaksh, 1974).
Methanol has caused birth defects in rats exposed by the oral (Infurna et al, 1981) and inhalation (Nelson et al, 1984;
Nelson et al, 1985) routes. Exencephaly (a defect in the skull bone structure that leaves the brain exposed) and cleft
palate (a fissure or unformed bone structure in the roof of the mouth (palate), lip, or facial area, occurring during the
embryonic stage of development) were increased in fetal mice exposed to methanol at an airborne concentration of
5,000 ppm or higher for 7 hours/day on days 6 to 15 of gestation.
Embryotoxicity and fetotoxicity were seen with maternal exposure to airborne concentrations of 7,500 ppm and above, and
reduced fetal weights with concentrations of 10,000 ppm or greater. The NOAEL was 1,000 ppm. Effects similar to those
seen in the 10,000 ppm dosage group were also seen in offspring of mice given a dose of 4 g/kg orally (Rogers et al,
1993).
2) Quaternary ammonium compound
Not available.
3) Phosphonate salt
Not available.
4) Sodium chloride
Sodium chloride is a component of this product. Intake of 12.4 g/kg of sodium chloride over a period of 23 days resulted in
elevation of blood pressure in humans (RTECS, 1997). Sodium chloride caused a variety of genetic effects in E. coli
bacteria, rats, and human, hamster, and mouse cells in vitro (RTECS, 1997). When injected in mice at high doses (1900 to
2500 mg), it was embryotoxic and teratogenic in a study designed to pursue a laboratory animal teratogenicity study to its
limits (Nishimura & Miyamoto, 1969). In other studies, it was not teratogenic in rats (Grollman & Grollman, 1962); (Minor &
Becker 1971; Singh et al, 1973), hamsters (Ferm, 1965) or pigs (Rosendrantz et al, 1970). It was nontoxic when injected
into chick embryos (McLaughlin et al, 1963).
Ecological information12 .
Aquatic ecotoxicity
Conclusion/Summary :Not available.
Biodegradability
Conclusion/Summary :Not available.
6/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
The generation of waste should be avoided or minimized wherever possible. Empty
containers or liners may retain some product residues. This material and its container
must be disposed of in a safe way. Dispose of surplus and non-recyclable products via
a licensed waste disposal contractor. Disposal of this product, solutions and any by-
products should at all times comply with the requirements of environmental protection
and waste disposal legislation and any regional local authority requirements. Avoid
dispersal of spilled material and runoff and contact with soil, waterways, drains and
sewers.
Waste disposal
Disposal considerations
Disposal should be in accordance with applicable regional, national and local laws and regulations.
:
13 .
Refer to Section 7: HANDLING AND STORAGE and Section 8: EXPOSURE CONTROLS/PERSONAL PROTECTION
for additional handling information and protection of employees.
Transport information
3 -
3
F L A M M A B L E L IQ U ID
DOT Classification
TDG Classification 3
FLAMMABLE LIQUID,
N.O.S. (Contains:
Methanol)
III
UN1993 FLAMMABLE LIQUID,
N.O.S. (Contains:
Methanol)
III
IMDG Class FLAMMABLE LIQUID,
N.O.S. (Contains:
Methanol)
3 III
Regulatory
information
UN number Proper shipping
name
Classes PG*Label Additional
information
UN1993 Emergency
schedules (EmS)
F-E S-D
UN1993
-
14 .
PG* : Packing group
North-America NAERG :128
DOT Reportable
Quantity
Marine pollutant
Methanol, 1620 gal of this product.
Not applicable.
Flammable liquid
Irritating material
Target organ effects
HCS Classification
Regulatory information
U.S. Federal regulations United States inventory (TSCA 8b): All components are listed or exempted.
Clean Water Act (CWA) 307: No products were found.
Clean Water Act (CWA) 311: sodium hydrogensulphite
Clean Air Act (CAA) 112 accidental release prevention: No products were found.
SARA 302/304/311/312 extremely hazardous substances: No products were found.
SARA 302/304 emergency planning and notification: No products were found.
SARA 302/304/311/312 hazardous chemicals: sodium chloride; methanol
SARA 311/312 MSDS distribution - chemical inventory - hazard identification:
WCW8975 COMBINATION SI/FE: Fire hazard, Immediate (acute) health hazard,
Delayed (chronic) health hazard
:
:
15 .
CERCLA: Hazardous substances.: sodium hydrogensulphite: 5000 lbs. (2270 kg);
methanol: 5000 lbs. (2270 kg);
7/8WCW89758/17/2010.
WCW8975 COMBINATION SI/FE
Regulatory information15 .
Clean Air Act (CAA) 112 regulated flammable substances: No products were found.
Clean Air Act (CAA) 112 regulated toxic substances: No products were found.
WHMIS (Canada)Class B-2: Flammable liquid
Class D-1B: Material causing immediate and serious toxic effects (Toxic).
Class D-2A: Material causing other toxic effects (Very toxic).
Class D-2B: Material causing other toxic effects (Toxic).
:
SARA 313
Canada
Product name CAS number Concentration
Methanol 67-56-1 30 - 60Supplier notification :
United States inventory
(TSCA 8b)
:All components are listed or exempted.
Canada (CEPA DSL)::At least one component is not listed.
Clean Air Act Section
112(b) Hazardous Air
Pollutants (HAPs)
:Not listed
Other information
0
3
2
National Fire Protection
Association (U.S.A.)
Health
Special
Instability
Flammability
FLAMMABLE LIQUID AND VAPOR. INHALATION CAUSES HEADACHES,
DIZZINESS, DROWSINESS AND NAUSEA AND MAY LEAD TO
UNCONSCIOUSNESS. CAUSES RESPIRATORY TRACT AND EYE IRRITATION.
MAY CAUSE BLINDNESS IF SWALLOWED. MAY CAUSE SKIN IRRITATION.
PROLONGED OR REPEATED CONTACT MAY DRY SKIN AND CAUSE IRRITATION.
CONTAINS MATERIAL THAT MAY CAUSE TARGET ORGAN DAMAGE, BASED ON
ANIMAL DATA.
Label requirements :
Notice to reader
Date of printing 8/17/2010.:
:
16 .
Indicates information that has changed from previously issued version.
NOTE: The information on this MSDS is based on data which is considered to be accurate. Baker Hughes,
however, makes no guarantees or warranty, either expressed or implied of the accuracy or completeness of this
information.
The conditions or methods of handling, storage, use and disposal of the product are beyond our control and may
be beyond our knowledge. For this and other reasons, we do not assume responsibility and expressly disclaim
liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or
disposal of this product.
This MSDS was prepared and is to be used for this product. If the product is used as a component in another
product, this MSDS information may not be applicable.
8/8WCW89758/17/2010.