United States Office of Solid Waste EPA 550-B-00-001

Environmental Protection and Emergency Response January 2000

Agency (5104) www.epa.gov/ceppo/

Chemical Emergency Preparedness and Prevention Office RMP SERIES

RISK MANA RISK MANAGEMENT

PROGRAM GUID PROGRAM GUIDANCE

FOR

PROPANE STORAGE

FACILITIES CILITIES

(40 CFR P (40 CFR PART 68) ART 68) ART 68)

 Printed on recycled paper

This document provides guidance to owners and operators of stationary sources to determine if their

processes are subject to regulation under section 112(r) of the Clean Air Act and 40 CFR part 68 and to

comply with regulations. This document does not substitute for EPA’s regulations, nor is it a regulation

itself. Thus, it cannot impose legally binding requirements on EPA, states, or the regulated community,

and may not apply to a particular situation based upon circumstances. This guidance does not represent

final agency action, and EPA may change it in the future, as appropriate.

TABLE OF CONTENTS

INTRODUCTION 1

Am I Covered? 1

What Do I Have To Do? 2

PROGRAM 1 5

Eligibility 5

What Must I Do For A Program 1 Process? 6

PROGRAM 3 9

What Must I Do For A Program 3 Process? 9

What Are The Release Scenarios? 9

What Do I Have To Do For The Prevention Program? 10

What Do I Have To Do For The Emergency Response Program? 15

What Do I Have To Do For My RMP? 15

SAMPLE RMP FOR PROGRAM 1 STORAGE FACILITY 17

SAMPLE RMP FOR PROGRAM 3 STORAGE FACILITY 23

APPENDIX A: HOW DO I DETERMINE IF MY SEPARATE (NONINTERCONNECTED) PROPANE TANKS ARE CO-LOCATED

APPENDIX B: RELEASE CALCULATIONS

APPENDIX C: CHECKLISTS AND OTHER DOCUMENTS

Process Safety Information

Propane Storage Facility Checklist

Operating Procedure Requirements

Maintenance Training

Maintenance Inspection Checklist and Tests for Propane Storage Facilities

LIST OF TABLES

Table 1: Typical Water Capacity of Propane Tanks, Transports, and Railroad Tank Cars

Table 2: Distance to a 1 PSI Overpressure

Table 3: Distances to 1 PSI for Pipe Releases

Table 4: Ways to Comply with Some Prevention Elements

TABLE OF POTENTIALLY REGULATED ENTITIES

This table is not intended to be exhaustive, but rather provides a guide for readers

regarding entities likely to be regulated under 40 CFR part 68. This table lists

the types of entities that EPA is now aware could potentially be regulated by this

rule and covered by this document. Other types of entities not listed in this table

could also be affected. To determine whether your facility is covered by the risk

management program rules in part 68, you should carefully examine the

applicability criteria discussed in Chapter 1 of this guidance and in 40 CFR

68.10. If you have questions regarding the applicability of this rule to a

particular entity, call the EPCRA/CAA Hotline at (800) 424-9346 (TDD: (800)

553-7672).

Category NAICS

Codes

SIC

Codes

Examples of Potentially Regulated

Entities

Propane

manufacturers and

processors

32411

32511

2911

2865

2869

Petroleum refineries

Petrochemical Manufacturers

Propane wholesalers 42271

42272

5171

5172

Bulk stations and terminals

Other petroleum product wholesalers

January 27, 2000

INTRODUCTION

This guidance is intended for propane storage facilities, such as wholesale distribution facilities and bulk

storage terminals. This document is a revision of EPA’s October 1998 guidance for propane storage

facilities. The document has been revised to reflect changes resulting from the 1999 Chemical Safety

Information, Site Security and Fuels Regulatory Relief Act.

If you have more than 10,000 pounds of propane stored in a single vessel or in a group of vessels (tanks,

cylinders) that are connected or stored close together, you may need to comply with the Chemical

Accident Prevention rule issued by the U.S. Environmental Protection Agency (EPA) under the Clean

Air Act. The rule is codified as part 68 of Title 40 of the Code of Federal Regulations (CFR). The goal

of this rule is to prevent accidental releases that could affect the public or the environment. If you are

subject to part 68 for propane storage, you must be in compliance no later than January 5, 2000, or the

date on which you first have more than a threshold quantity of a regulated substance in a process,

whichever is later.

If you have more than 10,000 pounds of propane, you are subject to part 68 unless one of the following

applies to you:

J The propane is stored for use as a fuel at your facility.

J The propane is held for sale, and the facility is a retail facility. A retail facility is one at which

more than half of the income is obtained from direct sales to end users or at which more than half

the fuel sold, by volume, is sold through a cylinder exchange program.

If you have more than 10,000 pounds of propane and you manufacture propane, use it as a feedstock, or

store it in bulk for sale, other than to end users, or if your retail sales do not make up more than half of

your income, you are subject to part 68. If you manufacture or use propane as a feedstock or store it for

wholesale distribution and use it as a fuel, the propane used for fuel is not covered by part 68; the

propane manufactured, processed, or stored for wholesale distribution is subject to part 68 provided the

quantity is greater than 10,000 pounds. If you use propane to fuel a covered process containing other

regulated substances above their thresholds, the propane is not covered, but you will have to consider the

hazards created by the propane when you conduct your process hazard analysis or hazard review. 

For most propane storage facilities, complying with this rule will be easy because most of the

requirements are similar to those you already comply with under state or local rules based on the

National Fire Protection Association (NFPA) standard number 58 on propane. If you are complying with

NFPA-58 and implementing other safe engineering practices for propane, you should have little more to

do for this rule besides filing a report with EPA.

AM I COVERED?

The capacity of propane tanks is usually given as water capacity (this information should be on the

nameplate of the tank). Table 1 translates the water capacity (in gallons) into propane weight (in

pounds). Read the tank capacity on the nameplate and check this table. 
2

January 27, 2000

Table 1 assumes that tanks are filled to 88 percent of capacity, the maximum level allowable under

NFPA-58 at 60(F. If you always keep your tanks filled to a lower level, you should adjust these numbers

to reflect your lower inventory. If you have larger tanks, multiply the water capacity times 3.696 to

determine pounds at 88 percent capacity. 

TABLE 1

TYPICAL WATER CAPACITY OF PROPANE TANKS, 

TRANSPORTS AND RAILROAD TANK CARS

Capacity in Gallons Capacity in Pounds

Storage Tank 12,000 44,400

Storage Tank 18,000 66,500

Storage Tank 30,000 111,000

Storage Tank 40,000 148,000

Storage Tank 60,000 222,000

Storage Tank 100,000 370,000

Storage Tank 120,000 444,000

Transport (Cargo Tank) 8,000 - 11,000 30,000-41,000

Rail Car DOT Class 105J300W & 105A300W 11,000 - 34,500 41,000-128,000

Rail Car DOT Class 112J340W & 112T340W

 114J340W & 114T340W

 114J400W & 114T400W 

26,000 - 34,500 96,000-128,000

Bobtails (Delivery Cargo Tank) 750 - 3200 2,800-12,000

Also, add up the amounts of propane in tanks that are connected or close together. If you have four 750-

gallon tanks, you are subject to the rule if the tanks are connected by piping, or if you store the tanks

close enough together that they could be involved in a single accident. For example, if a fire could

spread to all the tanks, they are considered one “process,” and the propane in all the tanks must be

counted toward the 10,000-pound threshold. You should also consider whether, if one tank exploded, the

other tanks could be affected by the shrapnel or fire. If you have several groups of propane tanks, widely

separated, you may be considered to have multiple processes (see Appendix A for additional guidance on

determining whether your propane tanks are separated far enough to be considered multiple processes.)

WHAT DO I HAVE TO DO?

The first step you should take after determining that you are covered by the rule is to decide which

Program level you are in. EPA developed the rule with three Program levels to reflect different levels of

risk and levels of effort needed to prevent accidents.
3

January 27, 2000

J Program 1 is a minimal set of requirements for processes that have a very low risk of affecting

the public in the event of an accident. 

J Program 2 is a streamlined set of requirements for processes not eligible for Program 1 or

subject to Program 3.

J Program 3 applies to processes that are not eligible for Program 1 and that are either subject to

the Process Safety Management (PSM) Standard of the Occupational Safety and Health

Administration (OSHA) or in certain industrial sectors (some chemical manufacturers, all

refineries, and all pulp mills).

This document does not provide detailed guidance on Program 3. Propane storage facilities subject to

part 68 will generally either be eligible for Program 1 or subject to Program 3. The OSHA PSM standard

exempts all retail facilities, using the same definition of retail facilities given above, and fuel users, but

covers wholesalers and manufacturers that process propane. Consequently, a propane facility subject to

part 68 will generally also be subject to the OSHA PSM standard. If you are subject to the OSHA PSM

standard, you should also see EPA’s General Guidance for Risk Management Programs or OSHA’s

Process Safety Management Guidelines for Compliance (OSHA 3133).

If you can qualify a process for Program 1, it is in your best interests to do so, even if the process is

already subject to OSHA PSM. For Program 1 processes, the implementing agency will enforce only the

minimal Program 1 requirements. If you assign a process to Program 3 when it might qualify for

Program 1, the implementing agency will enforce all of the requirements of the higher program level. If,

however, you are already in compliance with the prevention elements of Program 3, you may want to use

your RMP to inform the community of your prevention efforts. 
4

January 27, 2000
5

January 27, 2000

PROGRAM 1

ELIGIBILITY

Some propane storage facilities will be eligible for Program 1, particularly those that are a considerable

distance from any other business or residence. For a process to be eligible for Program 1, it must meet

the following criteria:

J The process must not have had an accidental release of propane that led to deaths or injuries of

people offsite or response or restoration activities at environmental receptors in the last five

years. Environmental receptors are limited to national or state parks, forests, or monuments;

officially designated wildlife sanctuaries, preserves, refuges, or areas; and Federal wilderness

areas; and, 

J There are no public receptors within a distance to a 1 psi overpressure from a worst-case release.

A worst-case release is defined by the rule as the loss of the contents of the single largest vessel (or

piping) containing the regulated substance. For propane and other flammable substances, the released

substance is assumed to explode and generate a pressure wave that can damage people or structures. The

rule requires you to determine the distance to a 1 psi overpressure (at 1 psi, windows will break). This

scenario is required by the regulation, and you must adopt this scenario. Table 2 provides the worst-case

distance to a 1 psi overpressure for propane tanks.

TABLE 2

DISTANCE TO A 1 PSI OVERPRESSURE

Nominal Water Capacity

(Gallons)

Distance to Endpoint 

(Miles)

500 - 1,750 0.1

1,751 - 7,000 0.2

7,001 - 23,000 0.3

23,001 - 51,000 0.4

51,001 - 90,000 0.5

90,001 - 120,000 0.6

If you have different quantities, RMP*Comp, a software system developed by EPA and NOAA, will

allow you to calculate worst-case distances quickly. RMP*Comp can be downloaded from
6

January 27, 2000

http://epa.gov/ceppo/. You may also use other models to develop distance estimates (see 40 CFR 68.22

for the parameters you must use in estimating worst-case release distances).

Next, you must determine if there are “public receptors” within a circle whose radius is equal to this

distance. Public receptors include “offsite residences, institutions (e.g., schools and hospitals), industrial,

commercial, and office buildings, parks, or recreational areas inhabited or occupied by the public at any

time without restriction by the stationary source where members of the public could be exposed to toxic

concentrations, radiant heat, or overpressure, as a result of an accidental release.” Offsite means areas

beyond your property boundary and "areas within the property boundary to which the public has routine

and unrestricted access during or outside business hours." Public roads are not public receptors.

If there are no public receptors within the distance to a 1 psi overpressure for your largest vessel and the

process has not had an accidental release that caused any of the listed offsite impacts, your process is

eligible for Program 1. If you have questions about whether certain areas are considered public

receptors, call the Emergency Planning and Community Right-to-Know Act (EPCRA) hotline at (800)

424-9346 (for DC area (703) 412-9810; T.D. (800) 553-7672) or check EPA’s General Guidance for

Risk Management Programs (available from the hotline or electronically at http://www.epa.gov/ceppo/).

WHAT MUST I DO FOR A PROGRAM 1 PROCESS?

Because your worst-case release would not affect public receptors, you only need to do two things: 

J Coordinate emergency response with your local fire department and any other local emergency

planning and response agencies; and,

J Complete a brief Risk Management Plan (RMP), as described below.

Coordination with the fire department may consist of a discussion with them or a walk-through of your

facility. The purpose is simply to be sure that the fire department is aware of the hazards associated with

propane at your facility and ready to respond if an accident occurs. Also, contact your State Emergency

Response Commission (SERC) to identify your Local Emergency Planning Committee (LEPC). You can

get contact information for your SERC from the EPCRA hotline (noted above).

The RMP will be filed with EPA and made available to state and local agencies and the public. EPA has

developed an electronic submission system that will make filing the RMP easy. To submit your RMP

electronically, you will need to download free software, called RMP*Submit, from EPA’s Internet

website at http://www.epa.gov/ceppo. The software will provide you with all the necessary instructions

to complete your RMP. You submit the completed electronic RMP to EPA by copying it onto a 31⁄2-inch

diskette and mailing the diskette to EPA. If you do not have access to a computer to load the software

on to, you may file a paper version. The necessary submission forms for the paper version are be

available from the hotline mentioned above or EPA’s Internet website at http://www.epa.gov/ceppo.

The RMP includes registration information (basic facility information); the worst-case release scenario; a

five-year accident history (of accidents that caused deaths, injuries, or significant property damage on

site, known offsite deaths or injuries, offsite property or environmental damage, or evacuations or

shelterings in place); emergency response activities; a brief executive summary; and a certification

statement.
7

January 27, 2000

The executive summary should be a brief description of the facility, the worst-case release scenario, steps

you take to prevent accidents (e.g., complying with state and local laws), emergency response

information (e.g., your coordination with the fire department), and any steps you are planning to take to

improve safety (e.g., upgrading equipment to meet newer editions of NFPA-58). The rest of the RMP is

filling in names, addresses, and numbers, and checking appropriate boxes. You do not need to submit

supporting documentation; you need only keep it onsite for inspection. Most propane storage facilities

will not have any accidents to report on the five-year accident history. If you do not, you need not

complete that section. A sample RMP for a Program 1 propane facility is attached.
8

January 27, 2000
9

January 27, 2000

PROGRAM 3

If your process is not eligible for Program 1, the process is most likely in Program 3 because it is

probably subject to the OSHA PSM standard. Most propane storage facilities that are in commercial or

industrial areas or close to residential areas will be subject to Program 3.

WHAT MUST I DO FOR PROGRAM 3?

For Program 3, you must:

J Analyze both a worst-case release scenario and an alternative release scenario;

J Implement a prevention program;

J Implement an emergency response program if your employees will respond to a release; and

J File an RMP.

WHAT ARE THE RELEASE SCENARIOS?

Worst-Case Scenario. Part 68 defines the worst-case release scenario you must analyze. It is described

in the previous section of this guidance (regarding Program 1). You can simply use Table 2 or

RMP*Comp to define the distance to the 1 psi endpoint for your largest tank.

Alternative Release Scenario. An alternative release scenario is a scenario that is more likely to

happen. It must reach an endpoint offsite unless no such scenario exists. One of the following scenarios

may be appropriate for you.

J Pull-Away Explosion. An alternative scenario may be a hose rupture caused by a pull-away. A

pull-away can occur if the driver fails to remove the hoses between the storage tank and the

transfer vehicle before moving the vehicle. In this scenario, the failure involves a 25-foot length

of unloading hose, 4" in diameter. The active mitigation devices are assumed to work as

designed, limiting the release to the contents of the hose. The release leads to a vapor cloud

explosion (endpoint 1 psi). The quantity released is 69 pounds. The distance to the endpoint is

175 feet (report as 0.03 miles).

J Piping Break. Another alternative scenario you may want to consider is a break in propane

piping leading to a 10-minute release and explosion. The distance to the 1 psi endpoint is shown

in Table 3.

Appendix B includes release calculations for alternative scenarios as well as scenarios in addition to the

two provided above.
10

January 27, 2000

TABLE 3

DISTANCES TO 1 PSI FOR PIPE RELEASES

Pipe Size

(inches)

Quantity Released

(pounds)

Distance to 1 psi

0.5 4,738 0.1

1 18,951 0.2

2 75,804 0.3

You must estimate in the RMP residential populations within the circles defined by the endpoints for

your worst-case and alternative release scenarios (i.e., the center of the circle is the point of release and

the radius is the distance to the endpoint). You may use Census data and round to two significant digits

(e.g., 1147 becomes 1100, and 123 becomes 120). You do not need to conduct surveys or correct Census

data. In addition, you must report in the RMP whether certain types of public receptors (e.g., schools,

hospitals) and environmental receptors are within the circle. You do not need to identify specific

receptors; you simply need to check off the category.

WHAT DO I HAVE TO DO FOR THE PREVENTION PROGRAM?

The Program 3 prevention program is identical to the OSHA PSM Standard and has 12 elements:

J Safety information

J Process Hazard Analysis 

J Operating procedures

J Training

J Mechanical Integrity (Maintenance) 

J Pre-startup reviews

J Management of change

J Compliance audits

J Incident investigation

J Employee participation

J Hot work permit

J Contractors

If you are complying with NFPA-58 or state or local laws based on it, following the guidelines in the

National Propane Gas Association (NPGA) LP Gas Safety Handbook, and implementing NPGA safety

bulletins, you are probably already doing most of what you need to do to comply with these

requirements. The following sections provide additional information on how your current practices will

help you comply with the EPA rule. For a more complete discussion of the requirements, see the

General Guidance for Risk Management Programs, available at www.epa.gov/ceppo/, and OSHA’s

Process Safety Management Guidelines for Compliance (OSHA 3133).

Safety Information. You must have up-to-date information on propane and your propane equipment. 

You must have a Material Safety Data Sheet (MSDS) on propane. If you do not have one, contact your
11

January 27, 2000

supplier for a copy. You must also document your maximum intended inventory for your propane

equipment. This will generally be the capacity of your tank or tanks; see Table 1.

You need information on safe upper and lower temperatures, pressures, flows, and compositions. The

following information should meet this requirement:

J Propane is a gas at normal temperatures and pressures. It is commonly liquefied by storing it in a

closed container at pressures higher than its equilibrium vapor pressure. There is a direct

relationship between ambient temperature and the pressure inside the storage container. As the

ambient temperature increases, the pressure of the container increases proportionately. 

According to NFPA 58, 1998 Edition, Table B-1.2.1, commercial propane when heated to a

temperature of 105(F will produce a pressure of 210 pounds per square inch, gauge (psig). 

NFPA 58, 1998 Edition, Table 2-2.2.2 sets the current minimum design pressure for an ASME

tank at 250 pounds per square inch, absolute (psia). This design allows for a maximum vapor

pressure of 215 psia at 100(F. The discharge piping for pumps and compressors is currently

designed to 350 psi and vapor piping is designed for 250 psi according to NFPA 58, 1998

Edition, 3-2.10.2. The minimum temperatures are determined by the steel used in the design of

the storage tank and the piping. Liquid propane (if released at atmospheric pressure) can

refrigerate steel pipes and tanks down to temperatures of -44(F.

J Another property of propane in its liquid form is its ability to greatly expand when heated. 

Therefore, NFPA 58, 1998 Edition sets the maximum filling capacity of large tanks in Table 4-

4.2.2(b) to avoid overfilling. 

You must maintain equipment specifications for all equipment that is part of a covered process, including

your bulk storage tank(s), piping, pressure relief valves, hydrostatic relief valves, emergency shutoff

valves, temperature, pressure and level gauges, valves, pumps, compressors, and hoses. Specifications

for your bulk propane storage tank(s) are provided on the nameplate attached to the tank. If you do not

have the information, obtain it from your vendor and keep all such information on file.

You must document the codes and standards you used to design and build your propane facility and that

you follow to operate it. These codes will probably include the electrical and building codes that you

must comply with under state or local laws. Your equipment vendors will be able to provide you with

information on the codes they comply with for their products. 

The equipment specifications and lists of standards and codes will probably ensure that your process is

designed in compliance with recognized and generally good engineering practices. 

See the EPA and OSHA guidance documents cited above for more information on the elements that must

be documented as part of your safety information.

Process Hazard Analysis. You are required to conduct a process hazard analysis (PHA) to identify the

hazards associated with your equipment and propane, the possible malfunctions of equipment or human

errors that could cause a release, the safeguards needed to control hazards or prevent malfunctions or

errors, and any steps needed to detect or monitor releases. If you are required to comply with NFPA-58,

your review can focus on whether you are in compliance with that standard. You may need to consider
12

January 27, 2000

external events as well as internal failures. If you are in an area subject to earthquakes, hurricanes, or

floods, you should examine whether your system would survive these natural events without releasing

propane. You should consider the potential impacts of lightning strikes and power failures. If your

equipment could be hit by vehicles, you should examine the consequences of that. If you have anything

near the process that could burn, ask yourself what would happen if the fire affected the propane tanks or

equipment. See the EPA and OSHA guidance documents cited above for more information on analysis

techniques and issues to be considered. Appendix C provides a checklist that you can use.

When you complete the review, you must document the results and ensure and document that any

problems are addressed in a timely manner. 

Operating Procedures. Written operating procedures describe the tasks you or your operators must

perform, safe process operating parameters that must be maintained, and safety precautions for

operations and maintenance activities. These procedures tell you or your employees how to work safely

every day. Applicable portions of the National Propane Gas Association (NPGA) Certified Employee

Training Program and compliance with certain NPGA Safety Bulletins can be used to meet this

requirement. Other programs may be available that will also be acceptable. See the EPA and OSHA

guidance documents cited above for more information on the elements that must be included in the

procedures. A list of NPGA documents that may meet these requirements is included in Appendix C.

Training. You must ensure that any employee presently operating a process and any employee newly

assigned to a covered process have been trained or tested competent in the operating procedures that

pertain to their duties. For those employees already operating a process on June 21, 1999, you may

certify in writing that the employee has the required knowledge, skills, and abilities to safely carry out

the duties and responsibilities as provided in the operating procedures. You are not required to provide a

specific amount or type of training. You should develop a training approach that works for you. The

NPGA’s Certified Employee Training Program and any training you do to meet DOT requirements may

satisfy this requirement. You must provide refresher training. You must determine the frequency of

refresher training in consultation with any affected employees, but you must provide refresher training at

least once every three years. Training must be documented.

Maintenance. You must prepare and implement procedures to maintain the on-going mechanical

integrity of your propane equipment. You may use procedures or instructions provided by equipment

vendors or procedures in Federal or state regulations or industry codes as the basis for maintenance

procedures. You must also train maintenance workers in these procedures (if a contractor maintains your

equipment, the contractor’s employees should be trained as well). NPGA’s Certified Employee Training

Program covers many of the maintenance procedures for your propane equipment. 

You must establish a schedule for inspecting and testing equipment associated with your propane storage

facility. You may obtain recommendations from manufacturers, vendors, or trade associations. You

should, however, use your own experience as a basis for examining any schedules you obtain from

others. Many things may affect whether a schedule is appropriate. The manufacturer may assume a

constant rate of use. If your actual rate of use (e.g., the amount of propane pumped per hour) varies

considerably, the variations may cause additional wear on the equipment. Extreme weather conditions

may also increase wear on equipment. 
13

January 27, 2000

If you have workers that use your propane facility, talk with them as you prepare or adopt these

procedures and schedules. If their experience indicates that equipment fails more frequently than the

manufacturer expects, you should adjust the inspection schedule to reflect that experience. 

See the EPA and OSHA guidance documents cited above for more information on these requirements. 

A list of NPGA training that applies to maintenance procedures and a maintenance inspection checklist

are included in Appendix C.

Management of Change. You must prepare and implement procedures to manage changes, except

replacements in kind. The purpose of this requirement is to ensure that changes you make do not create

any new hazards and that your employees and contractors are informed of the changes and trained in any

new procedures that are needed prior to start-up. See the EPA and OSHA guidance documents cited

above for more information on these requirements. 

Pre-Startup Review. Whenever you install a new covered process or modify an existing one, you must

perform a pre-startup review to ensure that the equipment is in accordance with the design specifications,

that all procedures related to the equipment are up-to-date, and that employees have been trained in the

operation of the new or modified process. See the EPA and OSHA guidance documents cited above for

more information on these requirements. 

Compliance Audits. At least every three years, you must certify that you have evaluated compliance

with EPA’s requirements for the prevention program for each covered process. At least one person who

conducts the audit must be knowledgeable about the process. You must develop a report of the audit’s

findings, determine and document an appropriate response to each finding, and document that you have

corrected all deficiencies. You must retain compliance audit reports for five years.

Incident Investigation. You must investigate each incident that resulted in, or could have resulted in, a

“catastrophic” release of propane. A catastrophic release is one that presents an imminent and

substantial endangerment to public health and the environment. You must start the investigation no later

than 48 hours after the accident. You must create a report on the accident that includes, at least, the date

of the accident and the date the investigation began, a description of the accident, the factors that

contributed to the accident, and any recommendations that resulted from the investigation. You must

address the recommendations and share the findings with any employees whose jobs are affected by the

findings. Investigation reports must be retained for five years.

The NPGA “LP-Gas Safety Handbook,” and NPGA bulletin #202-93 “After Accident Procedure” may

help you comply with this requirement.

Employee Participation. You must develop a written plan to implement the requirements for employee

participation. See the OSHA guidance document cited above for more information on this requirement. 

Hot Work Permit. You must issue hot work permits for hot work conducted near your covered process. 

See the OSHA guidance document cited above for more information on this requirement.

Contractors. If you use contractors to perform maintenance, renovation, or specialty work on or near a

covered process, you must implement a program to ensure that your contractors are qualified to perform
14

January 27, 2000

the work and are informed of the potential hazards. See the OSHA guidance document cited above for

more information on these requirements. 

Table 4 summarizes the ways that propane facilities can comply with some of these requirements.

TABLE 4

WAYS TO COMPLY WITH SOME PREVENTION ELEMENTS

Program 3 Prevention Element How a Propane Facility Can Meet This Requirement

Safety Information - Maintain Material Safety Data Sheets on propane

- Use the information provided in this guidance

- Document NFPA-58 information

- Maintain propane equipment vendor-supplied information

- Maintain records on electrical and building codes followed

Hazard Review - Use checklist in Appendix C

- Review compliance with NFPA-58

Operating Procedures - Implement NPGA Certified Employee Training Program

- Comply with NFPA-58

- Comply with NPGA safety bulletins

- Use written operating procedures for propane systems

Training - Implement NPGA Certified Employee Training Program.

- Document training done to meet DOT requirements

- Document training done to comply with NFPA-58

- Comply with NPGA Safety Bulletins

- Provide refresher training at least every three years

Maintenance - Implement NPGA Certified Employee Training Program

- Use checklist in Appendix C

- Establish a maintenance and testing schedule

- Document inspections and maintenance done by equipment

vendors

Compliance Audits - Conduct and document a compliance audit every three years; 

respond to each finding, and document that you have corrected

any deficiencies.

Incident Investigation - Implement practices in NPGA’s LP-Gas Safety Handbook

- Implement NPGA bulletin #202-93 “After Accident Procedure”
15

January 27, 2000

WHAT DO I HAVE TO DO FOR THE EMERGENCY RESPONSE PROGRAM?

If you have at least one Program 3 process at your facility, you may be required to implement an

emergency response program, consisting of an emergency response plan, emergency response equipment

procedures, employee training, and procedures to ensure the program is up-to-date. This requirement

applies if your employees will respond to some releases involving propane. The emergency response

section of EPA's rule allows you to decide first whether the employees will respond to an accidental

release of propane and then what involvement the employees will have in the event of a release of

propane. If you choose not to have employees respond, then you must coordinate response actions with

the local fire department and have in place appropriate mechanisms to notify emergency responders when

there is a need for a response.

Some propane storage facilities will rely on local responders to handle any accident. If you plan to have

your employees respond to a propane release, you should consult EPA’s General Guidance for Risk

Management Programs to determine what you need to do to develop and implement an emergency

response program.

WHAT DO I HAVE TO DO FOR MY RMP?

The RMP for a Program 3 process will include the same sections covered in the Program 1 process, plus

a report on the alternative release scenario and the report on the prevention program. Except for the

executive summary, the RMP consists of names, numbers, and check-off boxes. If you have more than

one process, you still file only one RMP. If you have multiple Program 3 processes, but they all contain

propane, you report only one worst-case scenario and one alternative scenario to cover all of them. (If

you have multiple Program 1 processes, you must report a worst-case scenario for each Program 1

process to establish that the process is eligible for Program 1.) 

If you have one Program 3 process, your RMP will include:

J The executive summary (covering the alternative release scenario as well as worst-case)

J Registration data

J Worst-case and alternative release data

J Five-year accident history (only if you’ve had any accidents to report)

J Prevention program data

J Emergency response data

J The certification

A sample RMP and certification statement for a Program 3 propane facility is attached.
16

January 27, 2000

 
17

January 27, 2000

SAMPLE RMP for PROGRAM 1 PROPANE STORAGE FACILITY

(This sample RMP is for a fictitious facility named, “Smith Gas Company Terminal.”

Any resemblance to any actual facility is accidental).

CERTIFICATION STATEMENT

Based on the criteria in 40 CFR 68.10, the distance to the specified endpoint for the worst-case accidental release

scenario for the following processes is less than the distance to the nearest public receptor:

& Wholesale LPG facility 

Within the past five years, the process has had no accidental release that caused offsite impacts provided in the risk

management program rule (40 CFR 68.10(b)(1)). No additional measures are necessary to prevent offsite impacts

from accidental releases. In the event of fire, explosion, or a release of a regulated substance from the process,

entry within the distance to the specified endpoint may pose a danger to public emergency responders. Therefore,

public emergency responders should not enter this area except as arranged with the emergency contact indicated in

the RMP. The undersigned certifies that, to the best of my knowledge, information, and belief, formed after

reasonable inquiry, the information submitted is true, accurate, and complete.

 William R. Smith William R. Smith 

Signature Print Name

 Company Owner 6/21/99 

Title Date

EXECUTIVE SUMMARY

The accidental release prevention and emergency response policies at your facility: This facility complies with

NFPA-58 requirements for LP-Gas storage, and it is our policy to adhere to all applicable federal, state, and local

laws. If an emergency were to occur, it is our policy to notify the Garvin County Fire Department and request that

they respond to the emergency.

A description of your facility and the regulated substances handled. This facility wholesales LPG, supplying

retail outlets, primarily gas stations and cylinder filling operations at cooperatives. The facility consists of a single

18,000-gallon tank, which we fill to between 85% and 88% capacity. 

The worst-case release scenario. Our worst-case scenario is failure of the 18,000-gallon storage tank when filled

to the greatest amount allowed (88% at 60F), resulting in a vapor cloud explosion. Since this facility is located in a

relatively remote, unoccupied area, the worst-case scenario would not affect anyone beyond our property.

The general accidental release prevention program and chemical-specific prevention steps. This facility

complies with EPA’s accident prevention rule and all applicable state and local codes and regulations. The propane

system is designed, installed, and maintained in accordance with NFPA-58 and state law. 

Five-year accident history. We have never had an accident involving propane that caused deaths, injuries, property

or environmental damage, evacuations, or shelterings in place.

The emergency response program. In the event of an emergency involving our propane system, it is our policy to

notify the Garvin County Fire Department and request that they respond to the emergency. We have discussed this

policy with the fire department; members of the fire department have inspected our propane system.
18

January 27, 2000

Planned changes to improve safety. None.

1. REGISTRATION

1.1 Source Identification

1.1.a. Facility Name: Smith Gas Company

1.1.b. Parent Company #1 Name: N/A

1.1.c. Parent Company #2 Name: 

1.2. RMP Facility Identifier: [EPA will assign]

1.3. EPA Identifier:

1.4. Dun and Bradstreet Numbers (DUNS) N/A

1.4.a. Facility DUNS:

1.4.b. Parent Company #1 DUNS:

1.4.c. Parent Company #2 DUNS:

1.5 Facility Location Address

a. Street 42 Rural Rt 7

b. Street - Line 2:

c. City: Plainville d. State: OK e. Zip Code: 12345 f. County: Garvin

g. Facility Latitude (degrees, minutes, and seconds): 34 40 20

h. Facility Longitude (degrees, minutes, and seconds): -097 21 06

i. Method for determining Lat/Long : I1 (interpolation, map)

j. Description of location identified by Lat/Long : AB Storage Tank 

1.6 Owner/Operator

a. Name: William R. Smith

b. Phone: (555) 555-5555

Mailing Address:

c. Street 1: 42 Rural Rt 7

e. City: Plainville f. State: OK g. Zip: 12345

1.7. Name and title of person responsible for RMP (part 68) implementation

a. Name: William R. Smith 
19

January 27, 2000

b. Title: Company owner

1.8. Emergency Contact

a. Name: William R. Smith 

b. Title: Company owner

c. Phone: (555) 555-5555

d. 24-hour phone: (555) 555-1111 e. Ext. or PIN:

1.9. Other Points of Contact (Optional) 

a. Facility or parent company e-mail address:

b. Facility public contact phone: (555) 555-5555

c. Facility or parent company www homepage address:

1.10. LEPC (Optional): Garvin County LEPC

1.11. Number of full-time employees (FTEs) On Site: 1

1.12. Covered by (select all that apply)

a. OSHA PSM: Yes

b. EPCRA section 302:

c. CAA Title V Air Operating Permit ID: 

1.13. OSHA Star or Merit Ranking: No

1.14. Last Safety Inspection Date: 12/07/97

1.15. Last Safety Inspection Performed by (select one) Fire department

1.16. Will this RMP involve Predictive Filing? No

1.17. Process Specific Information. For each covered process fill in the following chart. Use a separate sheet for

each process

.

Process Number:

(optional to help you

track)

1

Process Description:

(optional to help you

track)

Storage tank

a. Program Level: 1

b. NAICS Code(s): 42272 
20

January 27, 2000

c. Chemical c.1. Name: c.2. CAS Number: c.3. Quantity (lbs.):

Propane 74-98-6 67,000

4. FLAMMABLES: WORST CASE

4.1. Chemical Name Propane

4.2. Results based on (select one)

c. EPA’s RMP Guidance for Propane Storage Facilities Reference Tables or Equations

4.3. Scenario: Vapor Cloud Explosion

4.4. Quantity released (lbs.) 67,000 pounds

4.5. Endpoint Used: 1 psi

4.6. Distance to endpoint (miles) 0.30 miles

4.7. Residential population within distance to endpoint 0

4.8. Public receptors within distance to endpoint (select all that apply)

a. Schools d. Prisons /Correctional facilities

b. Residences e. Recreation areas

c. Hospitals f. Commercial/industrial areas

4.9. Environmental receptors within distance to endpoint (select all that apply)

a. National or state parks, forests, or monuments

b. Officially designated wildlife sanctuaries, preserves, or refuges

c. Federal wilderness area

4.10. Passive mitigation considered (select all that apply)

a. Dikes 

b. Fire walls

c. Blast walls

d. Enclosures

e. Other (specify)

4.11. Graphics file name (Optional)
21

January 27, 2000

9. EMERGENCY RESPONSE

9.1. Emergency response (ER) plan

a. Is facility included in the written community emergency response plan? No

b. Does facility have its own written emergency response plan? No

9.2. Does facility ER plan include specific actions to be taken in response to accidental releases of regulated

substance(s)? 

9.3. Does facility ER plan include procedures for informing public and local agencies responding to accidental

release? 

9.4. Does facility ER plan include information on emergency health care?

9.5. Date of most recent review/update of facility ER plan

9.6. Date of most recent emergency response training for facility’s employees

9.7. Local agency with which the facility ER plan or response activities are coordinated

a. Name of agency Garvin County Fire Department

b. Phone number (555) 555-1000

9.8. Subject to (select all that apply)

9.8.a. OSHA 1910.38 7

9.8.b. OSHA 1910.120

9.8.c. Clean Water Act/SPCC

9.8.d. RCRA

9.8.e. OPA-90

9.8.f. State EPCRA rules/law

9.8.g. Other (specify)
22

January 27, 2000
23

January 27, 2000

SAMPLE RMP for PROGRAM 3 PROPANE STORAGE FACILITY

(This sample RMP is for a fictitious facility named “Maryland LPG.”

Any resemblance to any actual facility is accidental).

CERTIFICATION STATEMENT

To the best of the undersigned’s knowledge, information, and belief formed after reasonable inquiry, the

information submitted is true, accurate, and complete.

 Mary L. Jones Mary L. Jones 

Signature Print Name

 Company Owner 6/21/99 

Title Date

EXECUTIVE SUMMARY

The accidental release prevention and emergency response policies at your facility: This facility complies with

NFPA-58 requirements for LP-Gas storage, and it is our policy to adhere to all applicable federal, state, and

local laws. If an emergency were to occur, it is our policy to notify the Howard County Fire Department and

request that they respond to the emergency. We also maintain a fire brigade on site to handle small emergencies.

A description of your facility and the regulated substances handled. This facility is a bulk terminal storing

LPG for resale to retail propane outlets. The facility consists of four 30,000-gallon tanks and two 120,000-

gallon tanks.

The worst-case and alternative release scenarios. Our worst-case scenario is failure of one 120,000-gallon

storage tank when filled to the greatest amount allowed (88% at 60F), resulting in a vapor cloud explosion. The

resulting distance to the endpoint extends offsite, and public receptors are within the distance to the endpoint. 

Our alternative release scenario is a break in a 0.5-inch diameter pipe, leading to a 10-minute release and

explosion. The resulting distance to the endpoint extends offsite, and public receptors are within the distance to

the endpoint. 

The general accidental release prevention program and chemical-specific prevention steps. This facility

complies with EPA’s accident prevention rule, the OSHA PSM standard, and all applicable state and local codes

and regulations. The propane system is designed, installed, and maintained in accordance with NFPA-58 and

state law. 

Five-year accident history. We have never had an accident involving propane that caused deaths, injuries,

property or environmental damage, evacuations, or shelterings in place.

The emergency response program. In the event of an emergency involving our propane system, it is our policy

to notify the Howard County Fire Department and request that they help respond to the emergency. We also

have a trained fire brigade. We have coordinated our response plans with the fire department; members of the

fire department have inspected our propane system and conducted a joint exercise with us.

Planned changes to improve safety. None.
24

January 27, 2000

1. REGISTRATION

1.1 Source Identification

a. Facility Name: Maryland LPG

b. Parent Company #1 Name: N/A

c. Parent Company #2 Name: 

1.2. RMP Facility Identifier: [EPA will assign]

1.3. EPA Identifier:

1.4. Dun and Bradstreet Numbers (DUNS) N/A

a. Facility DUNS:

b. Parent Company #1 DUNS:

c. Parent Company #2 DUNS:

1.5 Facility Location Address

a. Street 238 Main Street

b. Street - Line 2:

c. City: Odenton d. State: MD e. Zip Code: 21873 f. County: Howard

g. Facility Latitude (degrees, minutes, and seconds): 39 11 15

h. Facility Longitude (degrees, minutes, and seconds): -076 50 10

i. Method for determining Lat/Long : I1 (interpolation, map)

j. Description of location identified by Lat/Long : AB Administrative Building

1.6 Owner/Operator

a. Name: Mary L. Jones

b. Phone: (410) 777-1234

Mailing Address:

c. Street 1: 238 Main St.

e. City: Odenton f. State: MD g. Zip: 21873

1.7. Name and title of person responsible for RMP (part 68) implementation

a. Mary L. Jones

b. Company Owner
25

January 27, 2000

1.8. Emergency Contact

a. Name: Mary L. Jones 

b. Title: Company owner

c. Phone: (410) 777-1234

d. 24-hour phone: (410) 777-4321 e. Ext. or PIN:

1.9. Other Points of Contact (Optional) 

a. Facility or parent company e-mail address:

b. Facility public contact phone: (410) 777-1234

c. Facility or parent company www homepage address:

1.10. LEPC (Optional): Howard County LEPC

1.11. Number of full-time employees (FTEs) On Site: 6

1.12. Covered by (select all that apply)

a. OSHA PSM: Yes

b. EPCRA section 302:

c. CAA Title V Air Operating Permit ID: 

1.13. OSHA Star or Merit Ranking: No

1.14. Last Safety Inspection Date: 10/19/98

1.15. Last Safety Inspection Performed by (select one) Fire department

1.16. Will this RMP involve Predictive Filing? No

1.17. Process Specific Information. For each covered process fill in the following chart. Use a separate sheet for

each process.

Process Number:

(optional to help you

track)

1

Process Description:

(optional to help you

track)

Storage Tanks

a. Program Level: 3

b. NAICS Code(s): 42271 Petroleum Bulk Terminal
26

January 27, 2000

c. Chemical c.1. Name: c.2. CAS Number: c.3. Quantity (lbs.):

Propane 74-98-6 1,331,000

4. FLAMMABLES: WORST CASE

4.1. Chemical Name Propane

4.2. Results based on (select one)

c. EPA’s RMP Guidance for Propane Storage Facilities Reference Tables or Equations

4.3. Scenario: Vapor Cloud Explosion

4.4. Quantity released (lbs.) 120,000 pounds

4.5. Endpoint Used: 1 psi

4.6. Distance to endpoint (miles) 0.60 miles

4.7. Residential population within distance to endpoint 200

4.8. Public receptors within distance to endpoint (select all that apply)

a. Schools 8 d. Prisons /Correctional facilities

b. Residences 7 e. Recreation areas 8

c. Hospitals 8 f. Commercial/industrial areas 8

4.9. Environmental receptors within distance to endpoint (select all that apply)

a. National or state parks, forests, or monuments

b. Officially designated wildlife sanctuaries, preserves, or refuges

c. Federal wilderness area

4.10. Passive mitigation considered (select all that apply)

a. Dikes 

b. Fire walls

c. Blast walls

d. Enclosures

e. Other (specify)

4.11. Graphics file name (Optional)
27

January 27, 2000

5. FLAMMABLES: ALTERNATIVE RELEASES [Program 2 processes only]

5.1. Chemical Name Propane

5.2. Results based on: EPA’s RMP Guidance for Propane Storage Facilities Reference Tables or Equations

5.3. Scenario Vapor cloud explosion

5.4. Quantity released (lbs.) 4,738

5.5. Endpoint used (select one) 1 psi

5.6. Distance to endpoint (miles) 0.10

5.7. Residential population within distance to endpoint 14

5.8. Public receptors within distance to endpoint (select all that apply)

a. Schools d. Prisons /Correctional facilities

b. Residences 7 e. Recreation areas

c. Hospitals f. Commercial/industrial areas 8

5.9. Environmental receptors within distance to endpoint 

a. National or state parks, forests, or monuments

b. Officially designated wildlife sanctuaries, preserves, or refuges

c. Federal wilderness area

5.10. Passive mitigation considered (select all that apply)

a. Dikes 

b. Fire walls

c. Blast walls

d. Enclosures

e. Other (specify)

5.11. Active mitigation considered (select all that apply)

a. Sprinkler system

b. Deluge system

c. Water curtain

d. Excess flow valve

e. Other (specify)
28

January 27, 2000

5.12. Graphics file name (Optional)

7. PREVENTION PROGRAM - PROGRAM 3

For each process or process unit:

7.1. NAICS Code for process: 42271

7.2. Chemical name(s):

Propane

7.3. Safety information

 Date of most recent review/revision of safety information 02/04/97

7.4. Hazard review

a.1 Date of completion of most recent PHA/update 02/04/98

a.2 Technique used Checklist

b. Expected date of completion of any changes resulting from the PHA 02/04/98

c. Major hazards identified (select at least one)

Toxic release Overpressurization 7 Earthquake

Fire 7 Corrosion Floods

Explosion 7 Overfilling 7 Tornado

Runaway reaction Contamination Hurricanes

Polymerization Equipment Failure 7 Other

Loss of cooling, heating, electricity, instrument air

7.4.d. Process controls in use (select at least one)

Vents 7 Emergency air supply

Relief valves 7 Emergency power

Check valves Backup pump

Scrubbers Grounding equipment 7

Flares Inhibitor addition

Manual shutoffs 7 Rupture disks

Automatic shutoffs 7 Excess flow device 7
29

January 27, 2000

Interlocks Quench system

Alarms and procedures 7 Purge system

Keyed bypass Other: Breakaway couplings

7.4.e. Mitigation systems (select all that apply)

Sprinkler system 7 Deluge system

Dikes Water curtain

Fire walls Enclosure

Blast walls Neutralization

Other (specify)

7.4.f. Monitoring/detection systems (select all that apply)

Process area detectors Other (specify)

Perimeter monitors

7.4.g. Changes since last PHA update (select all that apply)

Reduction in chemical inventory Installation of perimeter monitoring systems

Increase in chemical inventory Installation of mitigation systems

Change in process parameters None required/recommended

Installation of process controls 7 Other (specify) 

Installation of process detection systems

7.5. Date of most recent review/revision of operating procedures 03/01/97

7.6. Training

a. Date of most recent review/revision of training programs 03/01/97

b. Type of training provided (select at least one)

Classroom On the job 7

Other (specify)

c. Type of competency test used (select at least one)

Written test Observation 7

Oral test Other (specify) 

Demonstration 7
30

January 27, 2000

7.7. Maintenance

a. Date of most recent review/revision of maintenance procedures 04/01/97

b. Date of most recent equipment inspection/test 10/19/98

c. What equipment inspected/tested Propane tanks, valves, and piping

7.8 Management of Change

 a. Date of the most recent change that triggered management of change procedure:

 b. Date of the most recent review or revision of management of change procedures: 6/14/98

7.9 Pre-Startup Review

 The date of the most recent pre-startup review: 

7.10. Compliance audits

a. Date of most recent compliance audit

b. Expected date of completion of any changes resulting from the compliance audit

7.11. Incident investigation:

a. Date of most recent incident investigation

b. Expected date of completion of any changes resulting from the investigation

7.12 Employee participation plan

 Date of the most recent review or revision of the employee participation plan: 4/16/99

7.12 Hot work permit procedures

 Date of the most recent review or revision of the hot work permit procedures: 24/12/97

7.13 Contractor safety procedures

 a. Date of the most recent review or revision of the contractor safety procedures: 4/16/99

 b. The date of the most recent review or revision of contractor safety performance: 4/16/99
31

January 27, 2000

9. EMERGENCY RESPONSE

9.1. Emergency response (ER) plan

a. Is facility included in the written community emergency response plan? Yes

b. Does facility have its own written emergency response plan? Yes

9.2. Does facility ER plan include specific actions to be taken in response to accidental releases of regulated

substance(s)? Yes

9.3. Does facility ER plan include procedures for informing public and local agencies responding to accidental

release? Yes

9.4. Does facility ER plan include information on emergency health care? Yes

9.5. Date of most recent review/update of facility ER plan 11/06/98

9.6. Date of most recent emergency response training for facility’s employees 3/14/99

9.7. Local agency with which the facility ER plan or response activities are coordinated

a. Name of agency Howard County Fire Department

b. Phone number (410) 123-4567

9.8. Subject to (select all that apply)

9.8.a. OSHA 1910.38 7

9.8.b. OSHA 1910.120

9.8.c. Clean Water Act/SPCC

9.8.d. RCRA

9.8.e. OPA-90

9.8.f. State EPCRA rules/law

9.8.g. Other (specify)
32

January 27, 2000
January 27, 2000

APPENDIX A

HOW DO I DETERMINE IF MY SEPARATE (NONINTERCONNECTED) PROPANE TANKS ARE CO-LOCATED?
January 27, 2000
1

 Vapor cloud explosions occurring in congested or confined spaces are generally stronger due to higher flame speeds

resulting from turbulence produced in unburned gases expanding ahead of the propagating flame front. 

2

 NFPA-58 generally requires propane tanks to be located outside of buildings. 

February 24, 1999

APPENDIX A

HOW DO I DETERMINE IF MY SEPARATE (NONINTERCONNECTED) PROPANE TANKS ARE CO-LOCATED? 

For separate, above-ground, non-interconnected propane tanks, one way to determine whether the

tanks constitute a single process (i.e., in rule language are “co-located”) is to determine whether they

are close enough together for a vapor cloud explosion resulting from the release of the total contents

of one tank to cause the catastrophic failure of an adjacent tank. Table A-1 indicates estimated

separation distances based on this method.

TABLE A-1

ESTIMATED SEPARATION DISTANCES FOR CONSIDERING NONINTERCONNECTED PROPANE TANKS AS SEPARATE PROCESSES

Tank Capacity (gal) Tank Confinement Estimated Separation

Distance (ft)

500 Partial - High 61

500 Low 41

1000 Partial - High 76

1000 Low 51

2000 Partial-High 96

2000 Low 64

The estimated separation distances in Table A-1 corresponding to “Partial - High” confinement are

based on a TNT-equivalent yield factor of 10 percent. This is the same yield factor specified in the

RMP rule for conducting flammable gas worst-case scenario modeling using TNT-equivalent methods

(readers should note that the distances in Table A-1 are not intended as worst-case endpoint

distances). This yield factor is appropriate for vapor cloud explosions occurring in areas with

numerous obstructions, such as in pipe racks, between stacks of crates or pallets, or near other closely

spaced structures1

. Table A-1 distances corresponding to “Low” confinement may be used if your

propane tanks are located outdoors2 in relatively flat, open terrain with few structures nearby (these

separation distances are based on a TNT-equivalent yield factor of 3%). Otherwise, the distances

corresponding to “Partial-High” confinement should be used to give reasonably conservative

separation distance estimates.
A-2

3

 NFPA-58 generally recommends against installing fire walls, fences, earth or concrete barriers, and other similar

structures around or over non-refrigerated LP-gas containers. There are some exceptions. For example, the standard permits

such structures to partially enclose LP-gas containers, if the structure is designed in accordance with a sound fire protection

analysis.

February 24, 1999

To determine whether adjacent, non-interconnected propane tanks constitute a single process,

measure the linear distance between the tanks and compare it to the estimated separation distance in

Table A-1 for tanks of that size and with that degree of confinement. Tanks that are separated by less

than the estimated separation distance in Table A-1 should generally be considered a single process

and their quantities added together to determine if the process exceeds the RMP threshold of 10,000

pounds. Individual tanks of propane which are separated by at least the estimated separation distance

in Table A-1 for tanks of that size and with that degree of confinement may generally be considered as

separate processes and thus not subject to the RMP regulation.

The distances provided in the Table above should be treated as estimates. Other methods of

determining separation distances may provide more accurate estimates and you are free to use other

reasonable methods if you choose. Also, the separation distances provided here should be considered

in relation to any unique circumstances at your site, such as topography, the presence of structures and

obstacles, the presence of blast-mitigation features, and other site-specific factors. For example, if

engineered blast-barriers are located between tanks, or if your tanks are underground, smaller

separation distances may be appropriate3

. On the other hand, topographical features, such as a

depression between two tanks where heavier-than-air propane vapor might collect, may warrant the

use of larger separation distances. Additionally, you should evaluate whether there are potential

events other than vapor cloud explosions that could reasonably be expected to cause multiple tanks to

fail, even at distances larger than those in Table A-1. EPA believes that for most properly designed

outdoor propane installations, such events are extremely unlikely, and that separating tanks by at least

the appropriate distance in Table A-1 is sufficient to establish separate processes. However, you

should evaluate your own circumstances and maintain documentation to support your determination.

Some readers of this guidance may conclude that it will be easier to re-locate one or more of their

propane tanks to conform to the distances provided above rather than taking the steps necessary to

comply with the regulation. This is certainly permitted, and in some cases may be an appropriate riskreduction measure. However, when taking such actions, you should be careful to maintain sufficient

separation distances between your propane tanks and nearby buildings, roads, and public receptors. 

EPA recommends consulting NFPA-58 or other applicable codes or standards to identify such

distances.
February 24, 1999

APPENDIX B

RELEASE CALCULATIONS
February 24, 1999
March 4, 1999

APPENDIX B - RELEASE CALCULATIONS

The endpoints that can be considered for the alternative release scenario are explosion damage,

radiant heat effect and lower flammability limit vapor concentration. Review these potential

alternative scenarios and pick one or more that best describes a scenario that is more likely to occur

than the worst-case scenario and that has an endpoint which is beyond your facility boundary. The

following are possible alternative release scenarios that use a vapor cloud explosion and an

overpressure of 1 psi.

PULL-AWAY: (ACTIVE MITIGATION DEVICES PERFORM AS DESIGNED)

An alternative scenario for a propane storage facility may be a hose rupture caused by a pull-away. A

pull-away can occur if the driver fails to remove the hoses between the storage tank and the transfer

vehicle (bobtail or transport) before moving the vehicle. In this case, the analysis considers the failure

of a 25 foot length of unloading hose, 4" in diameter. The active mitigation devices are assumed to

work as designed, limiting the release to the contents of the hose. 

Volume of hose = cross sectional area of hose x length of hose

Volume of hose = % × (4 in / 2)2

 × 1 ft2 / 144 in2 × 25 ft = 2.182 ft3

Wf = 2.182 ft3 × .504 × 62.37 pounds/ft3 = 68.59 pounds of propane

There are three methods described in EPA's OCA that you can use to determine the distance to the

endpoint for an alternative scenario. Two of those methods are used here as an example.

PULL-AWAY EXPLOSION

You can use equation C-1 from EPA's OCA to calculate the distance exposed to greater than 1 psi

overpressure. This method results in a distance to endpoint of 175 feet and the endpoint is 1 psi

overpressure.

D = 17 ( 0.1 × Wf

 × HCf / HCTNT )a

 

Where,

Wf

 is the weight of propane in kilograms in the vapor cloud,

Hcf

 is the heat of combustion of propane from Appendix C of EPA's OCA,

HcTNT is the heat of combustion of TNT from Appendix C of EPA's OCA, and

D is the distance in meters from the explosion where overpressure exceeds 1 psi.

D = 17 (.1 × Wf × 46333/4680)a = 17 (.1 × 68.6/2.2046 × 46333/4680)a = 53.29 meters = 

D = 174.8 feet

If you use this scenario as your alternative release scenario, the distance to endpoint is 175 feet and

the endpoint used is 1 psi overpressure.
B-2

4

 See NFPA 58, 1998 Edition, Section 3-9.4.2. A breakaway device is used when dispensing LPG. It is designed so that the

breakaway device fails (instead of the piping or hose) allowing other safety devices to retain the fuel and limit the spill. Failure of the breakaway

device means that the breakage occurs somewhere else rather than at the breakaway device during a pull away, thus negating the effectiveness

of some or all of the other safety devices.

March 4, 1999

PROCESS PIPING BREAKS

Liquid propane pipe failures: 1⁄2", 1", 2", 3", 4" and 6". (Causes: liquid expansion [failure of

hydrostatic valves], a pull-away [failure of breakaway devices4

], collision, corrosion.) For long pipes,

where the length to diameter ratio is significantly greater than one, flashing (i.e., conversion of

gaseous propane to liquid) in the discharge pipe results in a two-phase release. You can estimate the

amount released from a line shear using the following equation:

QR = 0.0853 × HA × F × L / [Vgl × (T × Cp)

0.5] 

Where: QR is the release rate in pounds per minute.

HA is the cross-sectional area of the pipe in square inches.

F is the frictional factor, which is 0.85 for pipe with a length to diameter ratio of 50.

L is the heat of vaporization, which is 426,000 joules per kilogram for propane.

Vgl is the specific volume of gas minus liquid in m3

/kg, which is 0.056 for propane.

T is the temperature in Kelvins (assumed to be 298).

Cp is the heat capacity, which is 2,400 joules/kilogram/Kelvin for propane.

0.0853 is a units conversion factor.

QR can be calculated using the values in the table below for HA. Now Q (the release quantity) can be

calculated for a 10-minute release, and D (the distance to the endpoint in feet) can be calculated using

equation C-1 from EPA’s OCA. Note that Q cannot be larger than the amount of propane contained

in your storage tank (this should be considered especially for 6" pipes). 

For a 1" pipe:

QR = 512.5 pounds per minute

Q = QR × 10 minutes = 5,125 total pounds released (Q = Wf

)

D = 17 ( 0.1 × Wf

 × HCf / HCTNT)

a = 17 × (0.1 × 5,125 / 2.2046 × 46333 / 4680)a = 224

D = 224 meters = 735 feet = 0.1 mile

If you use this scenario as your alternative release scenario, the distance to endpoint is 735 feet (or

about 0.1 mile) and the endpoint used is 1 psi overpressure.
B-3

March 4, 1999

TABLE B-1

POTENTIAL DISTANCES TO ENDPOINT FOR PIPE RELEASES

(for 1 psi Overpressure)

Pipe Size (inches) HA (inches2) QR

(pounds/minute)

Q Total Amount

Released after 10

minutes (pounds)

D (Miles)

0.50 0.20 128 1,281 0.1

1 0.79 512 5,125 0.1

2 3.14 2,050 20,499 0.2

3 7.07 4,612 46,122 0.3

4 12.57 8,199 81,995 0.4

6 28.27 18,449 184,488 0.5

OVERFILL STORAGE TANK - RELIEF VALVE LIFTS

A safety relief valve lifts (causes: overpressure or overfilling [failure of your level indicator and

administrative procedures]).

A four-valve multiport relief valve has a flow capacity of 27,750 SCFM/Air at 300 psi with three of

the four valves lifting. Estimate the amount of propane discharged from one port over 5 minutes and

the distance to endpoint if the vapor cloud finds a source of ignition and explodes. The density of air

is 12.39 ft3

/lb and the density of propane is 8.66 ft3/lb. To convert SCFM (air) to SCFM (propane) multiply

by 0.808.

The release rate from one port is 27,950 SCFM (air)/ 3 = 9,250 SCFM (air)

Q(propane) = Q(air) × 0.808 / 8.66 ft3

/lb = 863 lbs/min × 5 min = 4,315lbs = 1957.4 kg

D = 17 ( 0.10 × 1957.4 × 46,333/4680)a = 211.9 meters × 3.281 ft/meter = 695.2ft / 5280ft/mile =

0.13 miles.
B-4

March 4, 1999

TABLE B-2

RELIEF VALVE DISCHARGES (FOR 1 PSI OVERPRESSURE)

Relief Valve Size

(inches)

Capacity

SCFM of

Air

Release Rate

(lbs/min)

Propane

Duration

(min)

Amount

Released

(lbs)

Distance to

Endpoint 

(Miles)

Multiport 21⁄2" 9,250 863 5 4,315 0.1

Dual Port 11⁄4" 5,250 490 5 2,449 0.08

21⁄2" 10,390 969 5 4,847 0.1

11⁄2" 6,080 567 5 2,836 0.1

11⁄4" 5,280 492 5 2,463 0.1

1 " 3,340 312 5 1,558 0.09
March 4, 1999

APPENDIX C

CHECKLISTS AND OTHER DOCUMENTS
March 4, 1999
March 4, 1999

 PROCESS SAFETY INFORMATION

Process Safety Information Worksheet: Propane Storage

Item Description

MSDS Propane

Maximum Intended Inventory

Nominal Water Capacity of Largest

Tank

Temperature Upper:

Lower:

Pressure Upper:

Lower:

Flow Rate Loading:

Unloading:

Vapor Piping

Liquid Piping

Safety Relief Valves 

RV1

RV2

RV3

RV4

Internal Valve

Excess Flow Valve 

EFV1

EFV2

EFV3

EFV4

Emergency Shutoff Valve

ESV1

ESV2
C-2

Item Description

March 4, 1999

Hydrostatic Relief Valve

HSV1

HSV2

HSV3

HSV4

HSV5

HSV6

Pump 1

Pump 2

Compressor 1

Compressor 2

Vaporizer Type: Sz. Flow:

Strainer

Check valves

Sightflow Indicator

Tank Level Indicator

Tank Temperature Indicator

Tank Pressure Indicators

Other Temperature Indicators

Other Pressure Indicators

Design Codes

State or Local Codes

Piping Design

Tank Design ASME NB# State ID#

Vaporizer Design ASME NB# State ID#

Date of Most Recent Revision Revised By:
C-3

March 4, 1999
C-4

5

 Completing the Propane Storage Facility Hazard Review Checklist does not guarantee that your facility is in complete compliance

with NFPA 58, 1998 Edition.

6

 The Propane Storage Facility Hazard Review Checklist is based on NFPA 58, 1998 Edition. Over the years, various changes

in NFPA 58 have been made to reduce the probability of a propane release. You should carefully review any change to NFPA 58 since your

facility was constructed and consider appropriate changes to ensure the safety of your facility. Document the actions that you take. You should

be ready to explain any differences between the version of NFPA 58 that you used to construct your facility and the current version. 

March 4, 1999

PROPANE STORAGE FACILITY CHECKLIST5,6

Answer the questions below by indicating "Yes", "No" or "N/A" (for not applicable). "No" responses

require further comment and a projected completion date for correcting the deficiency.

Siting Yes/No/NA Comments

1. Does the arrangement of your fixed storage tanks conform

with the minimum distances allowed in Table 3-2.2.2 of

NFPA 58, 1998 Edition?

2. Are your fixed storage tanks separated from any oxygen or

hydrogen storage by the minimum distances given in Table

3-2.2.7(f) of NFPA 58, 1998 Edition?

3. Are your transfer points separated from the exposure

points by the minimum distances given in Table 3-2.3.3 of

NFPA 58, 1998 Edition?

Piping, Equipment & Container Appurtenances Yes/No/NA Comments

1. Is your storage facility designed according to ASME

code for pressure vessels? 

 Fixed Storage Tanks ASME?

 Vaporizers ASME?

2. Is the pressure rating of your storage tanks appropriate for

the product in service?

 Storage Tanks?

 Vaporizers?

3. Is the stored product properly identified?

4. On installations with multiple tanks, are the elevations of

your storage tanks arranged to prevent unintentional

overfilling of the lowest container?
C-5

Piping, Equipment & Container Appurtenances Yes/No/NA Comments

March 4, 1999

5. On installations with stairways or ladders, are they well

anchored, supported and of slip proof construction?

6. On installations with stairways or ladders, are railings

provided and in good condition?

7. On installations with stairways or ladders, are catwalks

provided so personnel need not walk on any portion of

the container?

8. Is your piping designed according to NFPA 58, 1998

Edition, Section 3-2.10?

Are your pump and compressor discharge and liquid

transfer lines suitable for a working pressure of 350 psi?

Is your vapor piping suitable for a working pressure of

250 psi?

 On installations with vaporizers, are your vaporizers 

 designed according to 2-5.4.2 or 2-5.4.3 or 2-5.4.4 and 

 2-5.4.5 or 2-5.4.6 or 2-5.4.7 of NFPA 58, 1998 

 Edition?

9. Is the relief capacity of your pressure relief devices: 

 

 For fixed storage tanks, designed according to Sections 2- 

 3.2 and 3-2.5 or 3-2.6 of NFPA 58, 1998 Edition?

 On installation with vaporizers, are your vaporizers 

 designed according to 2-5.4.5 or 2-5.4.6 or 2-5.4.7 of 

 NFPA 58, 1998 Edition?

10. Is the capacity of your pressure relief devices designed

according to 2-3.2 and 3-2.5 or 3-2.6 of NFPA 58, 1998

Edition?

Have your relief devices been tested or replaced every ten

years according to the good practice recommended by

Section E-2.3.2 of NFPA 58, 1998 Edition? 

11. Do you have appropriate level gauges, temperature

indicators, and pressure gauges installed on your fixed

ASME storage tanks as specified in 2-3.3.2(b), 2-3.3.3,

2.3.4, 2.3.5 of NFPA 58, 1998 Edition?
C-6

Piping, Equipment & Container Appurtenances Yes/No/NA Comments

March 4, 1999

12. Do you have the appropriate hydrostatic relief valves

installed between every section of liquid piping which

can be blocked by manual or automatic valves according

to 2-4.7 and 3-2.11 of NFPA 58, 1998 Edition?

13. Do you have the appropriate corrosion protection

required by 3-2.14 of NFPA 58, 1998 Edition?

14. On installations with pumps, are they installed according

to 3-2.15.1 of NFPA 58, 1998 Edition?

On installations with automatic bypass valves, are they

installed on the discharge of your pump according to

3.2.15(b)1 and 2-5.2 of NFPA 58, 1998 Edition?

15. On installations with compressors, are they installed

according to 2-5.3 and 3-2.15.2 of NFPA 58, 1998

Edition?

On installations with compressors, is there either an

integral means of preventing liquid from entering the

compressor or a liquid suction protection trap according

to 3-2.15.2(b) of NFPA 58, 1998 Edition?

16. Do your compressor and pump motors conform with 2-

5.1.4 of NFPA 58, 1998 Edition?

17. On installations with liquid strainers, are they installed on

the suction of your pump or meter according to 3-2.15.3

and 2-5.5 of NFPA 58, 1998 Edition and capable of being

cleaned?

18. On installations with flexible connections on pumps,

compressors or loading and unloading bulkheads, are they

installed as specified by 2-4.6 of NFPA 58, 1998 Edition? 

19. Do you have either excess flow valves, backflow check

valves or internal valves as specified by 2-3.3.3 and 3-

3.3.7 of NFPA 58, 1998 Edition?

20. Do you have container appurtenance protection as

specified in 2-3.7 of NFPA 58, 1998 Edition?

21. Do you have manual valves and emergency shutoff valves

as required by 2-4.5.4, 3-2.10.11, 3-3.3.7 and 3-3.3.8 of

NFPA 58, 1998 Edition?
C-7

Piping, Equipment & Container Appurtenances Yes/No/NA Comments

March 4, 1999

22. On installations with vaporizing equipment, is it installed

according to 2-5.4 and 3-6 of NFPA 58, 1998 Edition?

Have the liquid traps, temperature controls, and

interlocks been tested per the manufacturer’s guidelines?

23. On installations with regulators, are they installed

according to 2-5.7 and 3-2.7 of NFPA 58, 1998 Edition?

24. Do you have a breakaway stanchion as required by 3-

9.4.2 of NFPA 58, 1998 Edition?

25. On installations with swivel-type piping, are they

installed as specified by 3-2.10.11(a) of NFPA 58, 1998

Edition?

26. Are all above ground lines securely fastened to structural

members of adequate strength and supported at proper

intervals?

27. Are pressure gauges located so that they will not be

exposed to physical damage?

28. Are there sufficient lines for all purposes, without

improper dual use or make-shift connections being used

for some operations?

29. Are hoses the correct type for each use? 

30. Are hose couplings of the correct type and properly

attached (fully seated on the hose)?

31. Is adequate transfer hose storage provided?

32. Are the written transfer, loading & unloading instructions

available (see § 68.52 of this model program)?

Human Factors Yes/No/NA Comments

1. Have your operators been trained on the written operating

instructions for this propane storage facility (see § 68.54

of this model program)?

2. For operators on the job on or before June 21, 1999, do

they have the required knowledge, skills and ability to

perform their duties safely?
C-8

Human Factors Yes/No/NA Comments

March 4, 1999

3. Are your operators whose job duties require the use of

the above listed equipment understand the operating

limits of the system in regards to:

Capacity? 

Pressure?

Temperature?

Adverse Weather or Natural Conditions?

4. Have your operators been trained in the correct response

to conditions which exceed the operating limits of the

system?

5. Have your operators been trained in their duties for

emergency conditions?

Fire?

LP Gas Release?

Severe Weather or Natural Conditions?

6. Are the written operating instructions available to the

operators (see § 68.52 of this model program)?

7. Do the written operating instructions reflect current

operation of the facility (see § 68.52 of this model

program)?

8. Have major modifications to your propane storage facility

taken place (see § 68.48 of this model program)?

9. Are contractors used at the facility?

10. Are safe work practices such as lock/tag, hot work and

line opening followed at the facility?
C-9

Human Factors Yes/No/NA Comments

March 4, 1999

11. Is there a written emergency response plan (see Subpart E

of this model program)?

Is it current?

Have your operators been trained?

Do you provide emergency response equipment?

Has it been checked?

General Hazards Yes/No/NA Comments

1. Does your propane storage facility have protection

against tampering as specified in under 3-3.6 of NFPA

58, 1998 Edition?

2. Does your propane storage facility have lighting as

specified in 3-3.7 of NFPA 58, 1998 Edition?

3. Is the area around your containers and transfer piping free

of all combustible material?

4. Has a fire safety analysis been performed for your

propane storage facility as suggested by 3-10.2.2 and 3-

10.2.3 of NFPA 58, 1998 Edition?

5. Has your fire safety analysis been reviewed by your local

fire authority?

6. Has your facility been required by your local fire

authority to provide special protection?

Fixed Water Sprays/Monitor Nozzles?

Insulating Coatings?

Mounding/Burial?

Other types?

7. Has a federal, state or local agency or fire authority

required:

Local Gas Detection Monitors?

Perimeter Gas Monitors and Public Alarms?

This Hazard Review was Completed by: On (Date):

The latest date by which all changes resulting from the process hazard review are expected 
C-10

March 4, 1999

to be completed is . .

 Date 

OPERATING PROCEDURES REQUIREMENTS

Procedure

Requirement

NPGA Certified Employee

Training Program

(CETP)

NPGA Bulletin

(1) Initial Startup: Distribution

Systems

Operations

“Preparing Propane Storage

Containers for Installation.”

Distribution

Systems

Operations

“Identifying Procedures Used to

Pressure Test and Leak Check

New Propane Distribution

Systems.”

(2) Normal Operations: Transfer Systems “Identifying Propane Pumps and

their Operation.”

Transfer Systems “Identifying Parts and Devices

Basic to Compressors.”

Plant Operations “Filling Propane Storage

Containers.”

Plant Operations “Unloading a Propane

Transport.”

Plant Operations “Unloading a Propane Tank

Car.”

Propane Delivery “Filling Cargo Tanks on Bulk

Delivery Vehicles.”

(3) Temporary

Operations:

Plant Operations “Removing Propane from

Stationary ASME Tanks and

DOT Cylinders.”

(4) Emergency Shutdown

and Operation:

200-89 How to Control LP-Gas

Leaks & Fires

202-81 What you should do in

case of accidents

involving LP-Gas

202-93 Steps to Take in the Event

of an Accident Involving

Propane

204-88 How to Handle LP-Gas

Fires with Portable Fire

Extinguisher

206-91 Emergency Response

Guidelines
C-11

Procedure

Requirement

NPGA Certified Employee

Training Program

(CETP)

NPGA Bulletin

March 4, 1999

207-94 Guidelines for Developing

Plant Emergency

Procedures

211-91 LP-Gas Fire Control and

HAZ MAT Training

Guide

(5) Normal (Manual)

Shutdown:

(6) Startup following a

normal or emergency

shutdown or a major

change that requires

a hazard review: See

item (1) above.

(7) Consequences of

deviations and steps

required to correct or

avoid deviations.

(8) Equipment

inspections.
C-12

March 4, 1999

 MAINTENANCE TRAINING

Module Certified Employee Training Program (CETP)

Basic Principles Identifying the Proper Use of Personal Protective Equipment

Basic Principles Identifying the Proper Use of Tools and Equipment

Basic Principles Identifying by Sight Hand Tools Commonly Used by Service Technicians

Basic Principles Identifying Pipe/Tube, Pipe/ Fittings, and Associated Tools

Transfer Systems

Operations

Identifying Propane Pumps and Their Operation

Transfer Systems

Operations

Identifying the Standards for Sizing, Installing and Inspecting Pump Protective

Devices

Transfer Systems

Operations

Troubleshooting Propane Pumps and Metered Delivery Systems

Transfer Systems

Operations

Identifying Parts and Devices Basic to Compressors

Transfer Systems

Operations

Maintaining and Troubleshooting Compressors

Distribution Systems Identifying the Operating Characteristics of Propane Vapor Regulators and

Metering Systems

Distribution Systems Installing Propane Vapor Regulating and Metering Systems

Distribution Systems Sizing Pipe for Use in Low Pressure Propane Distribution Systems

Distribution Systems Identifying Steel/Wrought Iron Piping Materials and Installing Procedures

Distribution Systems Identifying Tubing Materials and Installing Procedures

Distribution Systems Identifying and Sizing Vaporizer Systems

Distribution Systems Sizing Propane Liquid Piping Systems

Distribution Systems Identifying Installing and Servicing Procedures for Vaporizer Systems

Plant Operations Identifying the Operating Characteristics of Pressure Relief Valves

Plant Operations Identifying and Installing Gauges in Propane Storage Containers

Plant Operations Identifying the Operating Characteristics of Check Valves

Plant Operations Identifying the Operating Characteristics of Service Valves

Plant Operations Installing Valves in Propane

Plant Operations Inspecting Servicing and Maintaining Container Valves
C-13

Module Certified Employee Training Program (CETP)

March 4, 1999

Transfer Systems

Operations

Identifying the Operation and Maintenance of Withdrawal Valves

Transfer Systems

Operation

Identifying the Operation and Maintenance of Bulkheads and Emergency Shutoff

Valves (ESVs)

Distribution Systems

Operations

Installing Propane Liquid Distribution and Vaporizer Systems

Transfer Systems

Operation

Identifying the Operation and Maintenance of Hoses, Hose End Valves, and Hose

Reels

Distribution Systems

Operations

Identifying the Causes of Corrosion on Metal Surfaces

Distribution Systems

Operations

Identifying Methods and Procedures Used to Protect Metal Structures from

Corrosion

Distribution Systems

Operations

Identifying Procedures Basic to Installing Anodes and Testing Cathodic Protection

Systems

Distribution Systems

Operations

Identifying Procedures Used to Pressure Test and Leak Check New Propane

Distribution Systems
C-14

March 4, 1999

MAINTENANCE INSPECTION CHECKLIST AND TESTS FOR PROPANE STORAGE

FACILITIES

I. Construction Code Compliance Yes No and Comment

a) Check manufacturer’s data plate. Is it securely attached

and legible?

For each fixed storage vessel?

On installations with vaporizers, for each vaporizer?

b) Are the data plate(s) free of corrosion?

II. Conditions of Container(s) and Vaporizer(s) and Paint Yes No and Comment

a) Are above-ground containers properly painted?

Fixed storage tanks?

On installations with vaporizers, the vaporizers?

b) Are containers and vaporizers free of corrosion damage,

dents, gouges, or other damage?

III. Foundations Yes No and Comment

a) Are foundations in good condition?

b) Are footings free of settling which might cause

misalignment or piping strain?

c) Are containers and vaporizers free of corrosion at masonry

contact area?

d) Are saddle pads in good condition?

IV. Container Connections Yes No and Comment

a) Have excess flow and back flow check valves been recently

checked for proper operation?

V. Tank Fittings Yes No and Comment

a) Are all ACME (or other type) connectors in good condition

with good gaskets and are they plugged or capped? (See

NPGA Bulletin #134 “Care and Inspection of ACME

Threaded Hose Couplings.”)

b) Are all unused openings plugged or capped?

c) Are all fittings and hoses leak free?
C-15

a) Check manufacturer’s data plate. Is it securely attached

and legible?

For each fixed storage vessel?

On installations with vaporizers, for each vaporizer?

b) Are the data plate(s) free of corrosion?

March 4, 1999

d) Are all hoses marked "for LP-Gas service" with a pressure

rating of 350 psig (see NPGA Bulletins # 107-91 and #121-

89)?

e) Are all hoses properly secured, protected, and in

serviceable condition and are dust caps on delivery hoses

when not in use?

f) Are all hoses free from cuts or abrasions that expose the

reinforcing fabric and free from soft spots or bulges when

under pressure and without kinks, dents or flat spots?

VI. Gauges Yes No and Comment

a) Are pressure gauges in good condition and are they suitable

for 250 psig service (such as 0-400 psig)?

b) Are thermometers in good condition and checked for

accuracy?

c) On installations with vaporizers having temperature

controls, are they in good condition and have they been

tested in accordance with manufacturer’s

recommendations?

d) Are liquid level gauging devices approved for the service

involved and in good condition?

e) On installations with vaporizers having level control

devices, are they in good condition and have they been

tested in accordance with manufacturer’s

recommendations?

VII. Pressure Relief Valves Yes No and Comment

a) Is the relief valve data plate legible?

b) Do relief valves or vent stacks have protective caps or

closures to prevent entry of foreign matter?

c) Are weep holes for moisture drainage open and is gas

impingement on the container avoided?
C-16

a) Check manufacturer’s data plate. Is it securely attached

and legible?

For each fixed storage vessel?

On installations with vaporizers, for each vaporizer?

b) Are the data plate(s) free of corrosion?

March 4, 1999

d) Have the relief valves on containers larger than 2000

gallons and on vaporizers been tested or replaced within the

last 10 years as per NFPA 58, 1998 Edition

recommendation in E-2.3.2?

e) Does external visual inspection of the relief valve discharge

indicate no corrosion or obstruction?

VIII. Emergency Shut-off Valves Yes No and Comments

a) Are valves in good condition and do they shutoff tightly?

b) Does the emergency shutoff control system function

properly?

c) Are the remote shutoff controls installed in an accessible

area away from the transfer area?

d) Are the shutoff controls clearly identified?

e) On installations with vaporizers having automatic shutoff

controls, are they accessible, identified and been tested

according to manufacturer’s recommendations?

f) Are the emergency shutoff valves and manual transfer

valves on your loading or unloading stations protected from

pull away damage by a break-away-stanchion.

IX. Presence of Combustibles Yes No and Comments

a) Is the area within 10 ft. of the container(s) and vaporizers

free of weeds, long grass, rags, paper, wood or other

combustible debris?

X. Pipe (for Fixed Storage Tanks and Vaporizers) Yes No and Comments

a) Are all connections tight?

b) Are there sufficient lines for all purposes, without dual use,

or are make-shift connections being used for some

purposes?

c) Are connections labeled “liquid” or “vapor”?
C-17

a) Check manufacturer’s data plate. Is it securely attached

and legible?

For each fixed storage vessel?

On installations with vaporizers, for each vaporizer?

b) Are the data plate(s) free of corrosion?

March 4, 1999

d) Are there visible signs of exterior corrosion?

XI. Valves (for Fixed Storage Tanks and Vaporizers) Yes No and Comments

a) Are valves in good working order?

b) Do seats shut off tightly?

c) Is packing free of leaks?

d) Are necessary valve handles available at the valve location?

XII. Hydrostatic Relief Valves (for Fixed Storage Tanks and

Vaporizers)

Yes No and Comments

a) Are the valves in good working order and not leaking?

b) Are the valves fitted with protective caps?

c) Are the valve discharges positioned to avoid impinging gas

on the tank?

XII. Transfer Areas Yes No and Comments

a) Are hoses in good condition and free of deterioration, wear,

and blisters? See NPGA Bulletin #114 “Guide to Hose

Inspection.”

b) Are hoses capped or plugged when not is use?

c) Are hose couplings properly attached and fully seated on

the hose?

d) Are hose couplings worn or damaged?

e) Are coupling gaskets in good condition?

f) Are correct coupling wrenches available?

g) Are excess flow valves operating correctly?

h) Are the loading and unloading risers protected from traffic?

I) Are chock blocks provided for rail cars?

j) Have your fire extinguishers been tested and/or serviced?
C-18

a) Check manufacturer’s data plate. Is it securely attached

and legible?

For each fixed storage vessel?

On installations with vaporizers, for each vaporizer?

b) Are the data plate(s) free of corrosion?

March 4, 1999

k) Is adequate transfer hose storage available?

m) Are the written transfer instructions readily available?

XIV. Pumps and Compressors Yes No and Comments

a) Are the shafts free of leaks?

b) Are pumps equipped with a spring loaded by-pass valve

where required?

c) Is the by-pass valve functioning properly?

d) Are drive belts or couplings protected by suitable guards?

e) Is the compressor crank case oil at the proper level?

XV. Electrical Equipment Yes No and Comments

a) Do all switches, etc. function properly?

b) Are all housings properly assembled to maintain seal?

Inspected By: Inspection Date:

These procedures were last reviewed or inspected by: Date:

 

Name (signature)

Piece of Equipment Inspected: Most Recent

Date: