DERR-2025-006092

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

August 15, 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 Unit 18

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 Unit 18 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
WRXSOL-NH-WYO Hydrochloric acid 7647-01-0;
Xylene 1330-20-7 No Above Ground
Chemical Totes

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

August 15, 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: WRXSOL-NH-WYO SDS

WRXSOL-NH-WYO
Safety Data Sheet
Product Identifier WRXSOL-NH-WYO
Other Means of
Identification
None known
PureChem Services, 5 Km South on HWY 9, Carlyle, SK, S0C 0R0, 306-453-4414
Recommended Use
Emergency Phone No.
SECTION 1. IDENTIFICATION
Manufacturer/Supplier
Identifier
Acid Stimulation.
For Transport Emergencies Contact CANUTEC, 1-888-CAN-UTEC (226-8832), 613-996-6666
or *666 on a cellular phone, 24hr / 7 days
Emergency Contact, 587-233-4220, Monday - Friday 8 am -5 pm MT
Restrictions on Use None known.
Date of Preparation December 10, 2020
Label Elements
SECTION 2. HAZARD IDENTIFICATION
Signal Word:
Danger
Hazard Statement(s):
H227 Combustible liquid.
H290 May be corrosive to metals.
H314 Causes severe skin burns and eye damage.
H335 May cause respiratory irritation.
H361 Suspected of damaging fertility or the unborn child.
Precautionary Statement(s):
Prevention:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P234 Keep only in original packaging.
P260 Do not breathe dusts or mists.
P264 Wash hands and skin thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves, protective clothing, eye protection, face protection.
Classification
Flammable liquid - Category 4; Corrosive to metals - Category 1; Skin corrosion - Category 1; Serious eye damage -
Category 1; Reproductive toxicity - Category 2; Specific target organ toxicity (single exposure) - Category 3
Classified according to Canada's Hazardous Products Regulations (WHMIS 2015) and the US Hazard Communication
Standard (HCS 2012).
Date of Preparation:
Page of 0801
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
P280 Wear protective gloves, protective clothing, eye protection, face protection.
Response:
P301 + P330 + P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303 + P361 + P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or
shower.
P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present
and easy to do. Continue rinsing.
P308 + P313 IF exposed or concerned: Get medical advice or attention.
P310 Immediately call a POISON CENTER or doctor.
P363 Wash contaminated clothing before reuse.
P370 + P378 In case of fire: Use appropriate foam, carbon dioxide, dry chemical powder, water spray or fog to
extinguish.
P390 Absorb spillage to prevent material damage.
Storage:
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P406 Store in corrosion resistant container with a resistant inner liner.
Disposal:
P501 Dispose of contents and container in accordance with local, regional, national and international regulations.
Other Hazards
None known.
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Chemical Name CAS No.Other Identifiers%
Mixture:
Other Names
Hydrochloric acid 7647-01-0 Aqueous
hydrogen chloride
7 - 13*HCl
Xylene 1330-20-7 Xylol0.1 - 1*Dimethylbenzene
Notes
Concentrations are expressed in % weight/weight.
*The actual concentration or concentration range is withheld as a trade secret.
Inhalation
Remove source of exposure or move to fresh air. Keep at rest in a position comfortable for breathing. If
experiencing respiratory symptoms (e.g. coughing, shortness of breath, wheezing), call a Poison Center or doctor. If
breathing is difficult, trained personnel should administer emergency oxygen if advised to do so by Poison Center or
doctor. If breathing has stopped, trained personnel should begin rescue breathing. Avoid mouth-to-mouth contact by
using a barrier device. If the heart has stopped, trained personnel should start cardiopulmonary resuscitation (CPR)
or automated external defibrillation (AED). Call a Poison Center or doctor.
Skin Contact
Take off contaminated clothing, shoes and leather goods (e.g. watchbands, belts). Immediately rinse skin with
lukewarm, gently flowing water for at least 30 minutes. DO NOT INTERRUPT FLUSHING. If it can be done safely,
continue flushing during transport to hospital. Immediately call a Poison Center or doctor. Thoroughly clean
clothing, shoes and leather goods before reuse or dispose of safely.
Eye Contact
Immediately rinse the contaminated eye(s) with lukewarm, gently flowing water for at least 30 minutes, while
holding the eyelid(s) open. Remove contact lenses, if present and easy to do. Take care not to rinse contaminated
water into the unaffected eye or onto the face. Immediately call a Poison Center or doctor.
SECTION 4. FIRST-AID MEASURES
First-aid Measures
Date of Preparation:
Page of 0802
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
Eye Contact
Immediately rinse the contaminated eye(s) with lukewarm, gently flowing water for at least 30 minutes, while
holding the eyelid(s) open. Remove contact lenses, if present and easy to do. Take care not to rinse contaminated
water into the unaffected eye or onto the face. Immediately call a Poison Center or doctor.
Ingestion
Immediately call a Poison Center or doctor. Rinse mouth with water. Never give anything by mouth if person is
rapidly losing consciousness, or is unconscious or convulsing. Do not induce vomiting. If vomiting occurs, have
victim lean forward to reduce the risk of aspiration. If breathing is difficult, trained personnel should administer
emergency oxygen if advised to do so by the Poison Center or doctor. If breathing has stopped, trained personnel
should immediately begin rescue breathing. If the heart has stopped, trained personnel should start
cardiopulmonary resuscitation (CPR) or automated external defibrillation (AED). Avoid mouth-to-mouth contact by
using a barrier device.
Special Instructions
Not applicable.
Immediate Medical Attention and Special Treatment
Medical Conditions Aggravated by Exposure
None known.
Target Organs
Eyes, skin, reproductive system, respiratory system.
Most Important Symptoms and Effects, Acute and Delayed
If on skin: contact can cause pain, redness, burns, and blistering. Permanent scarring can result.
If in eyes: may cause serious eye damage. May irritate or burn the eyes. Permanent damage including blindness may
result.
Can irritate the nose and throat.
May cause reproductive effects.
Extinguishing Media
Suitable Extinguishing Media
Carbon dioxide, dry chemical powder, appropriate foam, water spray or fog. Use water to keep non-leaking, fire-
exposed containers cool.
Unsuitable Extinguishing Media
Do not use direct streams of large volumes of water as this may spread the fire.
Specific Hazards Arising from the Product
Combustible liquid. Can ignite if heated. Releases vapor that can form explosive mixture with air at or above the flash
point. May travel a considerable distance to a source of ignition and flash back to a leak or open container. Can ignite
if strongly heated. Contact with water causes violent frothing and spattering.
In a fire, the following hazardous materials may be generated: Carbon oxides. Oxides of nitrogen. Sulfur oxides.
Formaldehyde. Hydrogen chloride, chlorinated compounds.
Special Protective Equipment and Precautions for Fire-fighters
Evacuate area. Firefighters should wear appropriate breathing apparatus and protective clothing. Approach fire from
upwind to avoid hazardous vapors or gases. Containers may rupture from gas generation in a fire situation. Use water
spray only to cool fully closed containers. Before entry, especially into confined areas, use an appropriate monitor to
check for: toxic gases or vapors. Dike and recover contaminated water for appropriate disposal.
When fighting chemical fires, emergency responders should wear NIOSH approved self contained breathing apparatus
and appropriate protective clothing.
SECTION 5. FIRE-FIGHTING MEASURES
Personal Precautions, Protective Equipment, and Emergency Procedures
Evacuate the area immediately. Isolate the hazard area. Keep out unnecessary and unprotected personnel. Do not
touch damaged containers or spilled product unless wearing appropriate protective equipment. Use the personal
protective equipment recommended in Section 8 of this safety data sheet. Increase ventilation to area or move leaking
SECTION 6. ACCIDENTAL RELEASE MEASURES
Date of Preparation:
Page of 0803
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
protective equipment recommended in Section 8 of this safety data sheet. Increase ventilation to area or move leaking
container to a well-ventilated and secure area. Eliminate all ignition sources. Use grounded, explosion-proof equipment.
Remove or isolate incompatible materials as well as other hazardous materials.
Environmental Precautions
If the spill is inside a building, prevent product from entering drains, ventilation systems and confined areas. Prevent
product from entering drains, soil, ditches, sewers, waterways and/or groundwater.
Methods and Materials for Containment and Cleaning Up
Small spills or leaks: stop or reduce leak if safe to do so. Eliminate all ignition sources. Contain and soak up spill with
absorbent that does not react with spilled product. Do NOT use combustible materials such as sawdust. Place used
absorbent into suitable, covered, labelled containers for disposal.
Large spills or leaks: eliminate all ignition sources. Isolate the spill area and restrict access. Dike spilled product to
prevent runoff. Vapor suppressing foams may be used to reduce vapor. Contain and soak up spill with absorbent that
does not react with spilled product. Place used absorbent into suitable, covered, labelled containers for disposal.
Precautions for Safe Handling
Obtain special instructions before use. Do not handle until all safety precautions have been read and understood.
Eliminate heat and ignition sources such as sparks, open flames, hot surfaces and static discharge. Post "No Smoking"
signs. Keep only in original packaging. Do not breathe in this product. Avoid generating vapors or mists. Do not get in
eyes, on skin or on clothing. Do not ingest product. Do NOT eat, drink or store food in work areas. Wash hands
thoroughly after handling this product and before eating, using the washroom or leaving work area. Only use where
there is adequate ventilation. Wear personal protective equipment to avoid direct contact with this chemical. See
Section 8 for appropriate Personal Protective Equipment (PPE). Keep containers tightly closed when not in use or
empty. Avoid release to the environment. Take off contaminated clothing and wash it before reuse.
Conditions for Safe Storage
Store in an area that is: cool, temperature-controlled, dry, well-ventilated. Store in a closed container. No smoking
around storage area. Store in corrosive resistant container with a resistant inner liner. Store locked up.
SECTION 7. HANDLING AND STORAGE
SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ACGIH® TLV®Alberta
Chemical Name TWA STEL [C]OEL STEL
Control Parameters
SASK
OEL STEL
Hydrochloric acid Not
established
2 ppm Not
established
2 ppm C Not
established
2 ppm C
Xylene 100 ppm A4 150 ppm 100 ppm 150 ppm 100 ppm 150 ppm
Appropriate Engineering Controls
Individual Protection Measures
Skin Protection
Eye/Face Protection
ACGIH® = American Conference of Governmental Industrial Hygienists.
TLV® = Threshold Limit Value.
TWA = Time-Weighted Average.
STEL = Short-term Exposure Limit.
C = Ceiling limit.
OEL = Occupational Exposure Limit
A4 = Not classifiable as a human carcinogen.
Wear gloves with appropriate chemical resistance, see manufacturers specifications for suitability. Wear chemical
protective clothing e.g. gloves, aprons, boots.
Wear chemical safety goggles. Wear chemical safety goggles and face shield when contact is possible.
Use local exhaust ventilation, if general ventilation is not adequate to control amount in the air. Do not allow product to
accumulate in the air in work or storage areas, or in confined spaces. Control static electricity discharges which
includes bonding of equipment to ground. An eyewash and safety shower should be within acceptable distance to the
work area. While handling product do not eat or drink, wash hands before breaks and at the end of workday.
Date of Preparation:
Page of 0804
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
Skin Protection
Respiratory Protection
If conditions exist above the OEL wear a NIOSH approved air-purifying respirator with an organic vapor cartridge.
Wear gloves with appropriate chemical resistance, see manufacturers specifications for suitability. Wear chemical
protective clothing e.g. gloves, aprons, boots.
pH < 1
Appearance Cloudy colourless - yellow.
Partition Coefficient, n-
Octanol/Water (Log Kow)
Not available
Odour Chlorine
Vapour Pressure Not available
Odour Threshold Not available
Vapour Density (air = 1)Not available
Boiling Range Not available
Evaporation Rate Not available
Flash Point 66 ºC (151 ºF) (PMCC)
Melting Point/Freezing Point Not available (melting); Not available (freezing)
Relative Density (water = 1)1.04 at 15 ºC (59 ºF)
Upper/Lower Flammability or
Explosive Limit
Not available (upper); Not available (lower)
Solubility Soluble in water; Not available (in other liquids)
Auto-ignition Temperature Not available
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Not availableDecomposition Temperature
Viscosity Not available (kinematic); Not available (dynamic)
Basic Physical and Chemical Properties
Flammability (solid, gas)Not applicable (liquid).
100 ºC (212 ºF)Boiling point/Initial boiling point
Chemical Stability
Stable under normal conditions.
Conditions to Avoid
Open flames, sparks, static discharge, heat and other ignition sources.
Incompatible Materials
Strong bases (e.g. sodium hydroxide), oxidizing agents (e.g. peroxides), strong reducing agents (e.g. hydrides), metals.
Hydroxides, amines, carbonates, alkalis, sulphides, formaldehyde.
Corrosive effect on metals.
Hazardous Decomposition Products
Carbon oxides. Oxides of nitrogen. Oxides of sulphur. Formaldehyde. Hydrogen chloride. Chlorinated compounds.
Possibility of Hazardous Reactions
None expected under normal conditions of storage and use.
SECTION 10. STABILITY AND REACTIVITY
Reactivity
Not reactive under normal conditions of use.
Date of Preparation:
Page of 0805
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
Skin Corrosion/Irritation
May burn the skin. Permanent scarring may result. Contact can cause pain, redness, burns, and blistering. Permanent
scarring can result.
Serious Eye Damage/Irritation
Corrosive. Contact causes severe burns with redness, swelling, pain and blurred vision. Permanent damage including
blindness can result.
SECTION 11. TOXICOLOGICAL INFORMATION
STOT (Specific Target Organ Toxicity) - Single Exposure
Inhalation
Material is irritating to mucous membranes and upper respiratory tract.
Ingestion
May cause irritation of the mouth, throat and stomach.
Can cause effects as described for inhalation.
No information was located.
STOT (Specific Target Organ Toxicity) - Repeated Exposure
Respiratory and/or Skin Sensitization
Not known to be a respiratory sensitizer. Not known to be a skin sensitizer.
Carcinogenicity
Not known to cause cancer.
Key to Abbreviations
ACGIH® = American Conference of Governmental Industrial Hygienists.
A4 = Not classifiable as a human carcinogen.
IARC = International Agency for Research on Cancer.
Group 3 = Not classifiable as to its carcinogenicity to humans.
NTP = National Toxicology Program.
OSHA = US Occupational Safety and Health Administration.
Acute Toxicity
Not known to be an aspiration hazard.
Aspiration Hazard
Inhalation; skin contact; skin absorption; eye contact; ingestion.
Likely Routes of Exposure
ATE (Inhalation)
ATE (Oral)
ATE (Dermal)
LC50 inhalation ATE (mix) = >20 mg/L
0% of the mixture consists of an ingredient or ingredients of unknown acute toxicity (inhalation)
LD50 oral ATE (mix) = >5000 mg/kg
0% of the mixture consists of an ingredient or ingredients of unknown acute toxicity (oral)
LD50 dermal ATE (mix) = >5000 mg/kg
0% of the mixture consists of an ingredient or ingredients of unknown acute toxicity (dermal)
Chemical Name LC50 LD50 (oral)LD50 (dermal)
Hydrochloric acid 4.65 mg/L (rat) (4-hour
exposure)
900 mg/kg (rat) 5010 mg/kg (rabbit)
Xylene 29 mg/L (rat) (4-hour
exposure) (vapor)
3287 mg/kg (rat)Not applicable
Chemical Name IARC ACGIH®NTP OSHA
Hydrochloric acid Group 3 A4 Not Listed Not Listed
Xylene Group 3 A4 Not Listed Not Listed
Date of Preparation:
Page of 0806
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
Development of Offspring
Xylene (mixed isomers) causes developmental toxicity (fetotoxic). Reduced fetal weight, delayed ossification and
persistent behavioural effects have been observed in the absence of maternal toxicity. Other developmental effects
have been observed in the presence of maternal toxicity.
Reproductive Toxicity
Conclusions cannot be drawn from the limited studies available.
Germ Cell Mutagenicity
No information was located.
Interactive Effects
No information was located.
OSHA = US Occupational Safety and Health Administration.
Sexual Function and Fertility
Effects on or via Lactation
No information was located.
No information was located.
No information was located.
No information was located.
SECTION 12. ECOLOGICAL INFORMATION
Do not allow product to contaminate domestic or irrigation water supplies, lakes, streams, ponds or rivers.
No information was located.
Ecotoxicity
Persistence and Degradability
Mobility in Soil
Bioaccumulative Potential
Acute Aquatic Toxicity
Chemical Name LC50 Fish EC50 Crustacea ErC50 Aquatic
Plants ErC50 Algae
Hydrochloric acid 24.6-30.9 mg/L
(Lepomis
macrochirus
(bluegill); 96-hour;
flow-through)
Not available Not available 0.0492 mg/L
(Selenastrum
capricornutum
(algae); 72-hour)
Xylene 13.5 (Lepomis
macrochirus
(bluegill); 96-hour;
static)
3.82 mg/L (Daphnia
magna (water flea);
48-hour; flow-
through)
Not available Not available
SECTION 13. DISPOSAL CONSIDERATIONS
This product and its container must be disposed of as hazardous waste. Do NOT dump into any sewers, on the ground
or into any body of water. Dispose of unused product in accordance with local environmental and public health
regulations. Empty containers retain product residue. Follow label warnings even if container appears to be empty. The
container for this product can present explosion or fire hazards, even when emptied. Do not cut, puncture, or weld on or
near this container. Dispose of or recycle empty containers through an approved waste management facility.
Disposal Methods
Date of Preparation:
Page of 0807
December 10, 2020
Product Identifier:WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision:
SECTION 14. TRANSPORT INFORMATION
UN No.Proper Shipping Name Packing
Group
Transport Hazard
Class(es)Regulation
UN1760 Corrosive Liquid, N.O.S. (Hydrochloric acid)8 IICanadian TDG
UN1760 Corrosive Liquid, N.O.S. (Hydrochloric acid)8 IIUS DOT
Proof of Dangerous Goods Classification
Corrosive Liquid, N.O.S (Hydrochloric acid)
Date of Classification
Technical Name
March 26, 2020
Amount of ingredient, corrositex, Schedule 1
Classification Class 8, PG II
Classification Method
SECTION 15. REGULATORY INFORMATION
Canada
Domestic Substances List (DSL) / Non-Domestic Substances List (NDSL)
All ingredients are listed on the DSL or are not required to be listed.
USA
Toxic Substances Control Act (TSCA) Section 8(b)
All ingredients are exempt from TSCA Inventory requirements.
Safety, Health and Environmental Regulations
Disclaimer The information contained in this document (Safety Data Sheet) was obtained from current and
reliable sources. However, the data is provided without any warranty, expressed or implied,
regarding its correctness, or accuracy. Since the conditions, handling, storage, and disposal of
this product are beyond the control of the manufacturer/supplier, they are not held responsible
for any loss, injury, damage, liability or expense arising out of the product’s use. No warranty,
expressed, implied, or inferred, regarding the product described in this document (Safety Data
Sheet) shall be created or inferred by any statement in this document (Safety Data Sheet).
SECTION 16. OTHER INFORMATION
SDS Prepared By HSE Department
Phone No.403-269-2800
Date of Preparation December 10, 2020
December 10, 2020Date of Last Revision
Date of Preparation:
Page of 0808
December 10, 2020
Product Identifier: WRXSOL-NH-WYO - Ver. 1.00
December 10, 2020Date of Last Revision: