DERR-2025-005869

m,cee[vtrD
MAR 0 5 ?C25
Environmental Response & Remediation
Wiilffisgv
February 28,2025
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
168 North 1950 West
Salt Lake City, Utah 84116
To Whom lt May Concern:
Enclosed please find Year 2024 Iier ll Emergency Hazardous Chemical lnventories for Northwest
Pipeline LLC facilities located in Utah. Copies were forwarded to the LEPC and local Fire Departments as
indicated below.
Site Name LEPC Site Name
Cisco CS
LEPC
VernalCS Uintah County Emergency Mgmt.
Heidi Lundberg, Emerg. Mgr.
641 E.300 S. #375
Vernal, UT 84078
Fire Departments
Tier ll Department
Uintah County Fire District
495 E. Main St.
Vernal, UT 84078
Site Name Fire Department
NORTHWEST PIPELINE
Environmental Services
650 South Main St.
Salt Lake City, UT 84101
Cora Phillips,
Emerg. Mgmt.. Dir
Grand County Sheriffls Office
25 South 100 East
Moab, UT 84532
San Juan County LEPC
Tammy Gallegos, Emerg. Mngr
PO Box 9
Monticello, UT 84535
Grand County LEPC
Moab Fire Dept.
45 South 100 East
Moab, UT 84532
Site Name
VernalCS
Moab CS
Cisco CS
Moab CS
Please contact me at 281-467-1608 / [e-mail] or Derek Forsberg at 801-584-6748 I
[e-mail] if you have any questions.
Sincerely,
C*U, D,o.-c)
Cecilia Diaz
Senior Engineer, EHS
Transmission & Gulf of Mexico Operating Area
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31 ,2024
Page 1
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Vernal Gompressor Station
FACILITY NAME AND LOCATION:
Northwest Pipeline LLC - Vernal Compressor Station
Dept: Gas Pipeline
10250 East 7750 North
Vernal, Utah 84078 USA
Emergency 24-Hour Phone N umbe r: 800-97 2-77 33
County: Uintah
Fire District: Vernal City
Latitude: 40.5682
Longitude: -109.3322
MAILING ADDRESS: 650 South Main St
Salt Lake Gity, Utah 84101 USA
E All facility information (not including chemical information) is identical to last year's submission
IDENTIFICATION NUMBERS:
Dun & Bradstreet:, 06-797 -7 322
NAICS: 486210 (Pipeline Transportation of Natural Gas)
SIC: 4922 (NATURAL GAS TRANSMISSION)
State lD: UT003015
ls the facility manned? E Manned E Unmanned
Maximum No. of Occupants: 3
REGULATORY INFORMATION:
Subject to Emergency Planning under Section 302 of EPCRA (40 CFR part 355)? n yes El t',to
Subject to Chem. Accident Prevention under Section 112(r) ot CAA (40 CFR part 68, Risk Mgmt. Pgm.)? E yes E ruo
CONTACT INFORMATION
Gontrol, Gas
Job Title: Supervisor
Contact Type(s): Emergency Contact
Address:
Phones: Work: 80 1 -20 1 -937 2 24-hour: 7 1 3-21 5-2550
Email: [e-mail]
Diaz, Cecilia
Job Title: Environmental Senior Engineer
Contact Type(s): Submitter
Address: 2800 Post Oak Blvd., Houston, TEXAS 77056 USA
Phones: Mobile - Cell: 2814671608
Email: [e-mail]
Forsberg, Derek
Job Title: Env. Manager
Contact Type(s): Tier ll lnformation Contact, Owner / Operator, Emergency Contact
Address:295 Chipeta Way, Salt Lake City, UTAH 84108 USA
Phones: Work: 801 -584-67 48 24-hour'. 801 -673-1 334 24-hour: 800-97 2-77 33
Emai I : derek.forsberg@Wi I I iams.com
CH EMICAL INVENTORY IN FORIT4ATION :
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31 ,2024
Page 2
Printed: February 28, 2025
Facility: Northwest Pipeline LLC . Vernal Gompressor Station (continued)
PHYSICAL HAZARDS:
flExplosive
E] Flammable (gases, aerosols, liquids, or solids)
E Oxidizer (liquid, solid, or gas)
E Seff-reactive
E Pyrophoric (liquid or solid)
! Pyrophoric gas
E Se[-heating
E Organic peroxide
E Corrosive to metal
E Cas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
! Hazard not otherwise classified
AMOUNTS:
E Below Reporting Thresholds
Maximum Amount: Maximum Amount code: 07 (25,00049,999 pounds)
Average Daily Amount: Average Daily Amount code: 05 (5,000-9,999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS:
E Confidential
Location Description: South side of facility, adjacent to mainline
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
Mixture or Product Name: CONDENSATE PL
CAS #:
Chemical Category: E Pure E Mixture
EHS: EYes ENo
Physical State: E Solid E LiquiO n Cas
E ldentical to previous year
E Trade secret
Mixture or Product Name: Mobil Pegasus 824 O'n
CAS #:
Chemical Category: f] Pure E Mixture
EHS: EYes Et,to
Physical State: E Solid E Liquid E Cas
E ldentical to previous year
E Trade secret
PHYSICAL HAZARDS:
n Explosive
E Flammable (gases, aerosols, liquids, or solids)
fl oxidizer (liquid, solid, or gas)
HEALTH HAZARDS:
E Acute toxicity (any route of exposure)
E] St<in corrosion or irritation
E Serious eye damage or eye irritation
fl Respiratory or skin sensitization
I Germ cell mutagenicity
E Carcinogenicity
E Reproductive toxicity
E Specific target organ toxicity (single or repeated exposure)
E Aspiration hazard
E Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
E Acute toxicity (any route of exposure)
E Sfin corrosion or irritation
n Serious eye damage or eye irritation
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December31,2024
Page 3
Printed: February 28, 2025
Facility: Northwest Pipeline LLG - Vernal Gompressor Station (continued)
E Hazard not otheruuise classified
AMOUNTS:
n Below Reporting Thresholds
Maximum Amount: Maximum Amount code: 06 (10,000-24,999 pounds)
Average Daily Amount: Average Daily Amount code: 06 (10,000-24,999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS
E Confidential
Location Description: North side of auxilary Buidling
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
E Self-reactive
! Pyrophoric (liquid or solid)
! Pyrophoric gas
E Self-heating
E Organic peroxide
E Corrosive to metal
E Cas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
Mixture or Product Name: Sulfuric Acid
CAS #: 7664-93-9
Chemical Category: E Pure E Mixture
EHS: EYes Etto
Physical State: E Solid n Liquid E Gas
E ldentical to previous year
E Trade secret
PHYSICAL HAZARDS:
E Explosive
E Flammable (gases, aerosols, liquids, or solids)
flOxidizer (liquid, solid, or gas)
E Self-reactive
I Pyrophoric (liquid or solid)
! Pyrophoric gas
E Self-heating
E Organic peroxide
E Corrosive to metal
E Gas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
AMOUNTS:
n Below Reporting Thresholds
! Respiratory or skin sensitization
E Germ cell mutagenicity
n Carcinogenicity
n Reproductive toxicity
E Specific target organ toxicity (single or repeated exposure)
E Aspiration hazard
E Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
E Acute toxicity (any route of exposure)
E St<in corrosion or irritation
E Serious eye damage or eye irritation
! Respiratory or skin sensitization
E Germ cell mutagenicity
! Carcinogenicity
E Reproductive toxicity
n Specific target organ toxicity (single or repeated exposure)
n Aspiration hazard
E Simpte asphyxiant
E Hazard not otherurise classified
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1to December31,2024
Page 4
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Vernal Compressor Station (continued)
Maximum Amount: 594 pounds [\4aximum Amount code: 03 (500-999 pounds)
Average Daily Amount: 594 pounds Average Daily Amount code: 03 (500-999 pounds)
[\4ax amount in largest container:
Days on site: 365
STORAGE LOCATIONS:
E Confidential
Location Description: Auxiliary Building
Container Type: Battery Pressure: Ambient pressure
Amount:
Temperature: Ambient temperature
MIXTURE COMPONENTS
Name: De-ionized water CAS #: 7732-18-5 E eHS
Max Amt Code: 03 (500-999 pounds) Component Percentage: 50 (by volume)
Name: Sulfuric Acid CAS #: 7664-93-9 E fHS
Max Amt Code: 03 (500-999 pounds) Component Percentage: 50 (by volume)
State/local fees: None
E I have attached a site plan
n I have attached a list of site coordinate abbreviations
E I have attached a description of dikes and other safeguard measures
Certification (Read and sign after completing all sections)
I certify under penalty of law that I have personally examined and am familiar with the information in pages 1 through 4,
and that based on my inquiry of those individuals responsible for obtaining this information, I believe that the submitted
informaton is true, accurate, and complete.
02t27t2025
Signature Date signed
Cecilia Diaz I Environmental Senior Engineer
Name and official title of owner/operator OR owner/operator's authorized representative
Tier ll
Emergency and Hazardous Ghemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31,2024
Page 1
Printed: February 28, 2025
Facility: Northwest Pipeline LLG - Moab Compressor Station
FACILITY NAI\4E AND LOCATION:
Northwest Pipeline LLC - l\4oab Compressor Station
Dept: Gas Pipeline
23 Miles South of Moab on Highway 191
Moab, Utah 84532 USA
Emergency 24-Hour Phone Number: 800-97 2-77 33
County: San Juan
Fire District: Moab
Latitude: 38.3265
Longitude: -109.4321
MAILING ADDRESS: 650 South Main St.
Salt Lake City, Utah 84101 USA
E All facility information (not including chemical information) is identical to last year's submission
IDENTIFICATION NUMBERS:
Dun & Bradstreet: 06-7 97 -7 322
NAICS: 486210 (Pipeline Transportation of Natural Gas)
SIC 4922 (NATURAL GAS TRANSI\4 ISSION)
State lD: UT00'1069
ls the facility manned? E Manned E Unmanned
Maximum No. of Occupants: 8
REGULATORY INFORMATION:
Subject to Emergency Planning under Section 302 of EPCRA (40 CFR part 355)? E Yes E No
Subject to Chem. Accident Prevention under Section 112(r) of CAA (40 CFR part 68, Risk Mgmt. Pgm.)? E yes E trto
CONTACT INFORMATION:
Control, Gas
Job Title: Supervisor
Contact Type(s): Emergency Contact
Address:
Phones: Work: 80 1 -20 1 -937 2 24-hour: 7 1 3-21 5-2550
Email: [e-mail]
Diaz, Cecilia
Job Title: Environmental Senior Engineer
Contact Type(s): Submitter
Address:2800 Post Oak Blvd., Houston, TEXAS 77056 USA
Phones: Mobile - Cell:2814671608
Email: [e-mail]
Forsberg, Derek
Job Title: Env. l\4anager
Contact Type(s): Tier ll lnformation Contact, Owner / Operator, Emergency Contact
Address: 295 Chipeta Way, Salt Lake City, UTAH 84108 USA
Phones: Work: 801 -58 4-67 48 24-hour: 801 -673-1 334 24-hour: 800-97 2-77 33
Email: [e-mail]
CH EMICAL INVENTORY INFOR]VIATION
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December3l ,2024
Page 2
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Moab Compressor Station (continued)
Mixture or Product Name: Ambitrol NTF Coolant
CAS #:
Chemical Category: E Pure E tvlixture
EHS: EYes Eruo
Physical State: E Solid E Liquid E cas
E ldentical to previous year
n Trade secret
PHYSICAL HAZARDS:
E Explosive
E Flammable (gases, aerosols, liquids, or solids)
E oxidizer (liquid, solid, or gas)
flself-reactive
E Pyrophoric (liquid or solid)
I Pyrophoric gas
E Self-heating
E Organic peroxide
E Corrosive to metal
E Cas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
Mixture or Product Name: Condensate
CAS #:
Chemical Category: ! Pure E Mixture
EHS: EYes ENo
Physical State: E Solid E Liquid E Cas
E ldentical to previous year
E Trade secret
PHYSICAL HAZARDS:
E Explosive
E Flammable (gases, aerosols, liquids, or solids)
n Oxidizer (liquid, solid, or gas)
E Hazard not othenvise classified
AMOUNTS:
E Below Reporting Thresholds
Maximum Amount: [\Iaximum Amount code: 08 (50,000-74,999 pounds)
Average Daily Amount: Average Daily Amount code: 07 (25,00049,999 pounds)
Max amount in largest container:
Days on site: 365
Location Description: 50'SE of Compressor Building
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
HEALTH HAZARDS:
n Acute toxicity (any route of exposure)
E Sfin corrosion or irritation
E Serious eye damage or eye irritation
E Respiratory or skin sensitization
n Germ cell mutagenicity
E Carcinogenicity
n Reproductive toxicity
E Specific target organ toxicity (single or repeated exposure)
E Aspiration hazard
n Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
n Acute toxicity (any route of exposure)
E St<in corrosion or irritation
E Serious eye damage or eye irritation
STORAGE LOCATIONS:
E Confidential
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December31,2024
Page 3
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Moab Compressor Station (continued)
n Hazard not othenrrise classified
AMOUNTS:
! Below Reporting Thresholds
Maximum Amount: Maximum Amount code: 08 (50,000-74,999 pounds)
Average Daily Amount: Average Daily Amount code: 05 (5,000-9,999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS
E Confidential
Location Description: 100' NE of Compressor Buidling
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
E Sef-reactive
n Pyrophoric (liquid or solid)
E Pyrophoric gas
flser-heating
fl organic peroxide
E Corrosive to metal
E Gas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
Mixture or Product Name: Mobil Pegasus 490
CAS #:
Chemical Category: E Pure E Mixture
EHS: EYes Eruo
Physical State: E Solid ElLiquid E cas
E ldentical to previous year
n Trade secret
PHYSICAL HAZARDS:
E Explosive
E Flammable (gases, aerosols, liquids, or solids)
n Oxidizer (liquid, solid, or gas)
E Self-reactive
n Pyrophoric (liquid or solid)
! Pyrophoric gas
E Ser-heating
E Organic peroxide
E Corrosive to metal
n Gas under pressure (compressed gas)
E ln contact with water emits flammable gas
n Combustible dust
AMOUNTS:
E Below Reporting Thresholds
! Respiratory or skin sensitization
n Germ cell mutagenicity
n Carcinogenicity
! Reproductive toxicity
E Specific target organ toxicity (single or repeated exposure)
n Aspiration hazard
n Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
n Acute toxicity (any route of exposure)
E St in corrosion or irritation
fl Serious eye damage or eye irritation
! Respiratory or skin sensitization
E Germ cell mutagenicity
! Carcinogenicity
E Reproductive toxicity
n Specific target organ toxicity (single or repeated exposure)
n Aspiration hazard
n Simpte asphyxiant
E Hazard not othenarise classified
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31 ,2024
Page 4
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Moab Compressor Station (continued)
Maximum Amount: Maximum Amount code: 08 (50,000-74,999 pounds)
Average Daily Amount: Average Daily Amount code: 07 (25,000-49,999 pounds)
Max amount in largest container:
Days on site: 365
Location Description: 70' SE of compressor building
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
Temperature: Ambient temperature
HEALTH HAZARDS:
E Acute toxicity (any route of exposure)
E St<in corrosion or irritation
E Serious eye damage or eye irritation
E Respiratory or skin sensitization
E Germ cetl mutagenicity
E Carcinogenicity
E Reproductive toxicity
n Specific target organ toxicity (single or repeated exposure)
! Aspiration hazard
n Simpte asphyxiant
Mixture or Product Name: SULFURIC ACID, WITH NOT MORE THAN 51% ACID
CAS #:
ChemicalCategory: EPure EMixture
EHS: EYes Eno
Physical State: E Solid ! LiquiO E Cas
E ldentical to previous year
E Trade secret
PHYSICAL HAZARDS:
! Explosive
E Flammable (gases, aerosols, liquids, or solids)
E Oxidizer (liquid, solid, or gas)
E Self-reactive
fl Pyrophoric (liquid or solid)
! Pyrophoric gas
E Self-heating
E Organic peroxide
E Corrosive to metal
E Gas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
E Hazard not othenryise classified
AMOUNTS:
E Below Reporting Thresholds
Maximum Amount: 530 pounds Maximum Amount code: 03 (500-999 pounds)
Average Daily Amount: 530 pounds Average Daily Amount code: 03 (500-999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS:
E Confidential
Location Description: Engine Control Room
Container Type: Other Pressure: Ambient pressure
Amount: 430 pounds
Location Description: Turbine Control Room
Temperature: Ambient temperature
STORAGE LOCATIONS:
E Confidential
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31,2024
Page 5
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Moab Compressor Station (continued)
Container Type: Other
Amount:'100 pounds
Pressure:Ambientpressure Temperature:Ambienttemperature
State/local fees: None
I have attached a site plan
I have attached a list of site coordinate abbreviations
I have attached a description of dikes and other safeguard measures
tr
tr
tr
Certification (Read and sign after completing all sections)
I certify under penalty of law that I have personally examined and am familiar with the information in pages 1 through 5,
and that based on my inquiry of those individuals responsible for obtaining this information, I believe that the submitted
informaton is true, accurate, and complete.
02t28t2025
Signature
Cecilia Diaz I Environmental Senior Engineer
Name and official title of owner/operator OR owner/operator's authorized representative
Date signed
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31,2024
Page I
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Cisco Compressor Station
FACILITY NAME AND LOCATION:
Northwest Pipeline LLC - Cisco Compressor Station
Dept: Gas Pipeline
Section 25, I -21 -S, R-23-E
Cisco, Utah 845'15 USA
Emergency 24-Hour Phone Number: 800-97 2-77 33
County: Grand
Fire District: tvloab
Latitude: 38.9335
Longitude: -109.3524
MAILING ADDRESS:650 South Main St.
Salt Lake City, Utah 84101 USA
El All facility information (not including chemical information) is identical to last year's submission
IDENTIFICATION NUMBERS:
Dun & Bradstreet'. 06-797-7322
NAICS: 486210 (Pipeline Transportation of Natural Gas)
SIC: 4922 (NATURAL GAS TRANSMISSION)
State lD: UT001065
ls the facility manned? E tr/anned E Unmanned
Maximum No. of Occupants: 2
REGULATORY INFORMATION:
Subject to Emergency Planning under Section 302 of EPCRA (40 CFR part 355)? E Yes El No
Subject to Chem. Accident Prevention under Section 112(r) ot CAA (40 CFR part 68, Risk Mgmt. Pgm.)? n Yes E ruo
CONTACT INFORMATION:
Control, Gas
Job Title: Supervisor
Contact Type(s): Emergency Contact
Address:
Phones: Work: 80 1 -20 1 -937 2 24-hour'. 7 1 3-21 5-2550
Email: [e-mail]
Diaz, Cecilia
Job Title: Environmental Senior Engineer
Contact Type(s): Submitter
Address: 2800 Post Oak Blvd., Houston, TEXAS 77056 USA
Phones: lr/obile - Cell: 2814671608
Email: [e-mail]
Forsberg, Derek
Job Title: Env. Manager
Contact Type(s): Tier ll lnformation Contact, Owner / Operator, Emergency Contact
Address: 295 Chipeta Way, Salt Lake City, UTAH 84108 USA
Phones: Work: 801 -58 4-67 48 24-hour: 80 1 -673-1 334 24-hour: 800-972-7733
Emai I : derek.fo rsberg@Wi ll iams.com
CH ETVIICAL INVENTORY INFORMATION :
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to Decembet 31 ,2024
Page 2
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Cisco Compressor Station (continued)
Mixture or Product Name: Ambitrol NTF Coolant
CAS #:
Chemical Category: E Pure E Mixture
EHS: f]Yes Etto
Physical State: n Solid E LiquiO n cas
E ldentical to previous year
E Trade secret
PHYSICAL HAZARDS:
! Explosive
fl Flammable (gases, aerosols, liquids, or solids)
E Oxidizer (liquid, solid, or gas)
I Self-reactive
! Pyrophoric (liquid or solid)
E Pyrophoric gas
E Self-heating
E Organic peroxide
E Corrosive to metal
E Cas under pressure (compressed gas)
f] ln contact with water emits flammable gas
E Combustible dust
Mixture or Product Name: Conoco 32 Oil
CAS #:
Chemical Category: n Pure E Mixture
EHS: EYes ENo
Physical State: E Solid E Liquid n cas
E ldentical to previous year
fl Trade secret
PHYSICAL HAZARDS:
E Explosive
n Flammable (gases, aerosols, liquids, or solids)
I Oxidizer (liquid, solid, or gas)
E Hazard not othenvise classified
AMOUNTS:
n Below Reporting Thresholds
Maximum Amount: Maximum Amount code: 04 (1,000-4,999 pounds)
Average Daily Amount: Average Daily Amount code: 04 (1,000-4,999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS:
E Confidential
Location Description: tank inside building
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
HEALTH HAZARDS:
n Acute toxicity (any route of exposure)
E St<in corrosion or irritation
E Serious eye damage or eye irritation
E Respiratory or skin sensitization
E Germ cell mutagenicity
E Carcinogenicity
E Reproductive toxicity
E Specific target organ toxicity (single or repeated exposure)
E Aspiration hazard
E Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
n Acute toxicity (any route of exposure)
EI St<in corrosion or irritation
E Serious eye damage or eye irritation
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to December 31 ,2024
Page 3
Printed: February 28, 2025
Facility: Northwest Pipeline LLC - Cisco Compressor Station (continued)
E Hazard not otherwise classified
AMOUNTS:
n Below Reporting Thresholds
Maximum Amount: Maximum Amount code: 05 (5,000-9,999 pounds)
Average Daily Amount: Average Daily Amount code: 05 (5,000-9,999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS
n Confidential
Location Description: lnside Compressor Building
Container Type: Above ground tank Pressure: Ambient pressure
Amount:
E Self-reactive
E Pyrophoric (liquid or solid)
! Pyrophoric gas
flself-heating
fl organic peroxide
n Corrosive to metal
E Cas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
Mixture or Product Name: Sulfuric Acid
CAS #: 7664-93-9
Chemical Category: E Pure E Mixture
EHS: EYes Et'to
Physical State: E Solid n LiquiO I Gas
E ldentical to previous year
n Trade secret
PHYSICAL HAZARDS:
flExplosive
fl Flammable (gases, aerosols, liquids, or solids)
D Oxidizer (liquid, solid, or gas)
E Self-reactive
! Pyrophoric (liquid or solid)
! Pyrophoric gas
E Sef-heating
E Organic peroxide
E Corrosive to metal
E Gas under pressure (compressed gas)
E ln contact with water emits flammable gas
E Combustible dust
AMOUNTS:
fl Below Reporting Thresholds
E Respiratory or skin sensitization
E Germ cell mutagenicity
! Carcinogenicity
E Reproductive toxicity
n Specific target organ toxicity (single or repeated exposure)
E Aspiration hazard
n Simpte asphyxiant
Temperature: Ambient temperature
HEALTH HAZARDS:
E Acute toxicity (any route of exposure)
fl Sfin corrosion or irritation
E Serious eye damage or eye irritation
fl Respiratory or skin sensitization
E Germ cell mutagenicity
n Carcinogenicity
E Reproductive toxlcity
E Specific target organ toxicity (single or repeated exposure)
fl Aspiration hazard
E Simpte asphyxiant
ZHazard not otherwise classified
Tier ll
Emergency and Hazardous Chemical lnventory
Specific lnformation by Chemical
Reporting Period: January 1 to Decembet 31,2024
Page 4
Printed: February 28, 2025
Facility: Northwest Pipeline LLG - Cisco Gompressor Station (continued)
Maximum Amount: 520 pounds Maximum Amount code: 03 (500-999 pounds)
Average Daily Amount: 520 pounds Average Daily Amount code: 03 (500-999 pounds)
Max amount in largest container:
Days on site: 365
STORAGE LOCATIONS:
n Confidential
Location Description: Auxiliary Building
Container Type: Battery Pressure: Ambient pressure
Amount:
Temperature: Ambient temperature
MIXTURE COMPONENTS:
Name: De-ionized water CAS #: 7732-18-5 E eHS
Max Amt Code: 02 (100-499 pounds) Component Percentage: 50 (by volume)
Name: Sulfuric Acid CAS #: 7664-93-9 E eHS
Max Amt Code: 03 (500-999 pounds) Component Percentage: 50 (by volume)
State/local fees: None
n I have attached a site plan
E I have attached a list of site coordinate abbreviations
n I have attached a description of dikes and other safeguard measures
Certification (Read and sign after completing all sections)
I certify under penalty of law that I have personally examined and am familiar with the information in pages 1 through 4,
and that based on my inquiry of those individuals responsible for obtaining this information, I believe that the submitted
informaton is true, accurate, and complete.
02t27t2025
Signature
Cecilia Diaz I Environmental Senior Engineer
Name and official title of owner/operator OR owner/operator's authorized representative
Date signed