# PROPOSED December 19, 2013

4621 - 1 Proposed Amendments to Rule 4621 RULE 4621 GASOLINE TRANSFER INTO ST ATIONARY STORAGE CONTAINERS, DELIVERY VESSELS, AND BULK PL ANTS (Adopted April 11, 1991; Amended September 19, 1991; Amended December 17, 1992; Amended May 20, 1993; Amended June 18; 1998; Amended Decem ber 20, 2007; Amended [ rule adoption date ])

1.0 Purpose

The purpose of this rule is to limit VOC emi ssions from stationary storage containers, delivery vessels, and bulk plants and to pr ovide the administrative requirements for determining compliance with this rule.

2.0 Applicability

This rule applies to storage containers located at bulk plants with capacities greater than 250 gallons and less than 19,800 gallons; to other stationary storage containers with capacities greater than 250 gallons; and to thos e storage containers that are not subject to the control requirements of Rule 4623 (Sto rage of Organic Liqui ds) Section 5.0. The rule also applies to gasoline delivery vessels.

3.0 Definitions

3.1 APCO: as defined in Rule 1020 (Definitions).

3.2 ARB: California Air Resources Board.

3.3 ARB Certified: a vapor recovery system, equipment, or any component thereof, for which the ARB has evaluated its performance and issued a valid Executive Order pursuant to California H ealth and Safety C ode Section 41954. Each component of a system that is a separate ARB certified item cannot be replaced with a non-certified item or othe r items that are not certified for use with the particular syst em. Except for qualified repairs, an ARB certified component shall be as supplied by the qualified manufacturer. A rebuilt component shall not be deemed as AR B certified unless the person who rebuilds the component is authorized by ARB to rebuild the designated ARB certified

component.

3.4 ARB Certified Phase I Vapor Recovery System: a vapor recovery system that has been certified by ARB pursuant to Section 41954 of the California Health and Safety Code.

3.5 Aviation Gasoline: gasoline used as fuel for aircraft that cannot be legally used

as fuel for motor vehicles.

# PROPOSED December 19, 2013

4621 - 2 Proposed Amendments to Rule 4621 3.6 Background: the ambient concentrati on of organic compounds determined at least two (2) meters upwind from any co mponent to be inspected and which is uninfluenced by any specific emission permit unit.

3.7 Bulk Plant: any loading rack and asso ciated unloading racks, storage containers and vapor recovery system(s) used to load less than 20,000 gallons of gasoline in any one day, to delivery vessels.

3.8 Business Day: a weekday, including Monday, Tuesday, Wednesday, Thursday, or Friday.

3.9 Component: includes, but is not lim ited to, any valve, fitting, threaded connection, pump, pressure relief device, pipe, flange, hatch, sight-glass, meter, or seal of a fluid system in VOC service.

3.10 Delivery Vessel: any car go container having a volumet ric capacity in excess of 120 gallons that is used fo r the transportation of gasoline or aviation gasoline. This term includes pumps, meters, va lves, fittings, pipings, and other appurtenances attached to a gasoline stor age container on a ve hicle and used in connection with the gasoline/aviation gaso line being transported. Containers used exclusively for aviati on gasoline in agricultural operations, with an annual throughput of 1,000 gallons or less, will not be considered delivery vessels for the purpose of this rule.

3.11 Emergency: a fire, flood, eart hquake, or other similar catastrophe.

3.12 EPA: United States Envi ronmental Protection Agency.

3.13 Excess Organic Liquid Drainage: more than 10 milliliters li quid drainage which is not contained by an ARB certified spill container. Such liquid drainage for disconnect operations shall be determined by computing the average drainage from three consecutive disconnects at any one loading arm.

3.14 Gasoline: any petroleu m distillate, petroleum distilla te/alcohol blend or alcohol having a Reid vapor pressure of four (4) pounds per square inch absolute or greater, which is used as a motor vehicle fuel, or any fuel wh ich is commonly or commercially known or sold as gaso line, including aviation gasoline.

3.15 Gasoline Vapors: VOCs in the disp laced vapors of gaso line, including any entrained liquids.

3.16 Highway: a way or place of whatever nature, publicly main tained and open to the use of the public for purposes of vehi cular travel. Highway includes street.

# PROPOSED December 19, 2013

4621 - 3 Proposed Amendments to Rule 4621 3.17 ICC: Interna tional Code Council.

3.18 Implement of Husbandry: a vehicle th at is used primarily in the conduct of agricultural operations pursuant to S ection 36000 of the California Vehicle

Code.

3.19 Leak: one of the following –

3.19.1 For delivery vessels, the dripping of VOC-containing liquid at a rate of more than three drops per minute, or a reading of greater than 100 percent of the lower explosive limit (21,000 ppm measured as equivalent propane) when measured in accordance with the te st method in Section

6.4.3 6.4.2.

3.19.2 For all other operations, the dri pping of VOC-containing liquid at a rate of more than three (3) drops per minute, or the detection of any gaseous or vapor emissions with a concen tration of total organic compound greater than 10,000 ppmv, as me thane, above background when

measured in accordance w ith the test method in Section 6.4.3 6.4.2. Any liquid or gas coming from a component undergoing repair or replacement, or during sa mpling of process fluid from a component or equipment into a container is not c onsidered sampling of a leak, provided such activities are done as expeditious ly as possible and with minimal spillage of material and VOC emissions to the atmosphere.

3.20 Leak-free: a condition wit hout a leak, as defined above.

3.21 Loading Operation: any aggregate or combination of gasoline loading and vapor control equipment from the connecti on at the inlet of the gasoline pump to and including the hose end connector at the portable delivery tanks and the discharge of the vapor control device(s).

3.22 Loading Rack: as defined in Rule 1020 (Definitions)

3.23 Major Modification: one of the following –

3.23.1 The addition, replacement, or removal of an underground storage container, or a modification that cau ses the container top to be unburied, is considered a major modification, or

3.23.2 The replacement of an aboveground st orage container. The installation of an aboveground storage container after retrofitting with standing loss controls or the exchange of an aboveground storage container for a standing loss control re trofitted aboveground storag e container of equal

# PROPOSED December 19, 2013

4621 - 4 Proposed Amendments to Rule 4621 capacity to comply with the requi rements of CP-206 is not a major

modification.

3.24 Mobile Fueler: any gasoline delivery ve ssel with an attached container that is used to transport and dispense gasoline from an onboard storage container into any motor vehicle fuel tank.

3.25 Motor Vehicle: a vehicl e that is self propelled.

3.26 Normal Business Hours: Monday through Friday, 8:00 am to 5:00 pm.

3.27 Operator: any person that owns, leases , or operates a facility that dispenses or transfers gasoline or that owns, leases, or operates a delivery vessel that dispenses or transfers gasoline.

3.28 Portable Hydrocarbon Detection Instru ment: a hand-held hydrocarbon analyzer that meets the criteria sp ecified in US EPA Method 21, 40 CFR Part 60. The

instrument shall be calibrated with methane.

3.29 Pressure Vacuum Relief Valve: a valv e that is installed on the gasoline storage container or the vent pipes of gasoline storage containers to relieve pressure or vacuum build-up at preset valu es of pressure or vacuum.

3.30 Retail Gasoline Outlet: any establishment at which gasolin e is sold or offered for sale to the general public for use in motor vehicles.

3.31 Submerged Fill Pipe: any fill pipe, th e discharge opening of which is entirely submerged when the liquid level is si x (6) inches above the bottom of the container. "Submerged fill pipe" when a pplied to a containe r which is loaded

from the side is defined as any fill pipe the disc harge opening of which is entirely submerged when the liquid level is 18 inches above the bottom of the

container.

3.32 Switch Loading: the transfer of dies el fuel into a delivery vessel or storage container with a capacity over 250 gallons which previously contained gasoline.

3.33 Vehicle: a device by wh ich any person or property may be propelled, moved, or drawn upon a highway, excepting a device moved exclusively by human power or used exclusively upon stationary rails or tracks.

3.34 VOC: as defined in Rule 1020 (Definitions).

# PROPOSED December 19, 2013

4621 - 5 Proposed Amendments to Rule 4621 4.0 Exemptions

Except for the requirements of Sections 6.1.1 and 6.1.4, the require ments of this rule shallThe requirements of Section 5.2.1 and 5.2.2 do not apply to the following operations:

4.1 The transfer of gasoline into any stati onary storage container with a capacity of 550 gallons or less used primarily for the fueling of implements of husbandry, if such container is equipped with a permanent submerged fill pipe.

4.2 The transfer of gasoline into any sta tionary storage contai ner having a capacity of 2,000 gallons or less wh ich was installed prior to July 1, 1975, if such container is equipped with a permanent submerged fill pipe, and provided no major modification is ma de on the container.

4.3 The transfer of gasoline into any stationary storage container in existence prior to July 1, 1975, which is equipped with an offset fill pipe if such container is equipped with a permanent submerge d fill pipe, and provided no major

modification is made on the container.

4.4 Mobile fuelers used exclusively for fueling emergency motor vehicles while on location at an emergency.

5.0. Requirements

5.1 Loading equipment and vapor collec tion equipment shall be installed, maintained, and operated such that it is leak-free, with no excess organic liquid drainage at disconnect.

5.2 Gasoline Storage and Loading

5.2.1 In addition to the re quirements of Section 5.1 no person shall transfer or permit the transfer of gasoline from any delivery vessel into any stationary storage container subject to requirements of this rule unless:

5.2.1.1 Such container, except thos e used for aviation gasoline, is equipped with an ARB certified permanent submerged fill pipe

and utilizes an ARB certified Ph ase I vapor recovery system that is maintained and opera ted according to manufacturer specifications and the applicab le ARB Executive Order; or

5.2.1.2 Containers used for avia tion gasoline are equipped with a permanent submerged fill pipe and a Phase I vapor recovery

# PROPOSED December 19, 2013

4621 - 6 Proposed Amendments to Rule 4621 system that is certified (or was previously certified) to meet a
minimum volumetric control of 95%.

5.2.2 Any vent pipe on a stationary gasoline storage container shall be equipped with a pressure-vacuum re lief valve in acco rdance with the requirements set forth in Sections 5.3 and 5.4, as applicable.

5.2.3 Vent pipes may be manifolded, as per the applicable ARB Executive Order, to a single pressure-vacuum relief valve. The pressure-vacuum relief valve shall be properly inst alled and maintained according to manufacturer specifications and the applicable ARB Executive Order.

5.2.4 Operators shall have all undergr ound storage container installations and all underground piping conf igurations inspected by the APCO prior to backfilling. The operator shall notif y the District by telephone or other District-approved method a nd obtain a confirmation number at least three business days prior to the backfilling.

5.3 Underground Storage Containers

5.3.1 Unless otherwise specified in th e applicable ARB Ex ecutive Order, for an underground storage container that c ontains gasoline and is located at a bulk plant, the container shall be equipped with an ARB certified pressure-vacuum relief valve set at 3.0±0.5 inches water column pressure relief and 8.0±2.0 inch es water column vacuum relief.

5.3.2 Unless otherwise specified in th e applicable ARB Ex ecutive Order, for an underground storage container that contains aviation gasoline and is located at a bulk plant, the containe r shall be equipped with a pressurevacuum relief valve set at 3.0±0.5 in ches water column pressure relief
and 8.0±2.0 inches water column vacuum relief.

5.3.3 For an underground storage containe r that contains gasoline and is not located at a bulk plant, the contai ner shall be equipped with an ARB certified Phase I vapor recovery syst em that is certified to have a minimum volumetric control efficiency of 98%.

5.3.4 For an underground storage containe r that contains av iation gasoline and is not located at a bulk plant, the container shall be equipped with a permanent submerged fill pipe and a Ph ase I vapor recovery system that is certified (or was previously certif ied) to meet a minimum volumetric
control of 95%.

# PROPOSED December 19, 2013

4621 - 7 Proposed Amendments to Rule 4621 5.3.5 Operators of underground storage c ontainers not located at bulk plants shall conduct and pass the applicable performance tests specified in

Sections 6.4.5 6.4. 4 through 6.4.8 6.4.7 to determine compliance at least once every 36 months, (no more than 30 days before or after the required performance test date) unless otherwise required under ARB Executive Order or Rule 4622 (Gasolin e Transfer into Motor Vehicle Fuel Tanks).

5.4 Aboveground Storage Containers

5.4.1 All aboveground storage containers shall be cons tructed and maintained

in a leak-free condition.

5.4.2 Until December 31, 2008, aAll a boveground storage containers that contain gasoline shall be equipped with pressure re lief valves set at eight (8) ounces per square inch, unless:

5.4.2.1 Otherwise specified in the applicable ARB Executive Order, or

5.4.2.2 Such setting will exceed the vessel’s maximum pressure rating.

5.4.3 5.4.2 On and af ter January 1, 2009, aAll aboveground storage containers that contain gasoline sha ll be equipped with an ARB certified pressure vacuum relief valve set 3.0± 0.5 inches water column pressure
relief and 8.0±2.0 inches water column vacuum relief, unless:

5.4.2.1 Otherwise specified in the applicable ARB Executive Order, or

5.4.2.2 Such setting will exceed the vessel’s maximum pressure rating.

5.4.4 5.4.3 All aboveground storage contai ners that contain aviation gasoline shall be equipped with pressure relie f valves set at eight (8) ounces per square inch, unless:

5.4.4.1 5.4.3.1 Otherwise speci fied in the applicable ARB

Executive Order or

5.4.4.2 5.4.3.2 Such setting w ill exceed the vessel’s maximum pressure rating.

5.4.5 5.4.4 On and afte r June 20, 2008, oOpera tors of an aboveground storage container not located at a bulk plant shall conduct and pass the performance test specified in S ection 6.4.9 6.4.8 to determine compliance at least once every 36 mont hs, (no more than 30 days before

# PROPOSED December 19, 2013

4621 - 8 Proposed Amendments to Rule 4621 or after the required performance te st date) unless otherwise required

under ARB Executive Order.

5.5 All Phase I vapor recovery system s shall be inspected according to the frequency specified in Table 1. The pe rson conducting the inspections shall, at a minimum, verify the following:

5.5.1 That the fill caps and vapor caps are not missing, damaged, or loose;

5.5.2 That the fill cap gasket and vapor cap gaskets are not missing or damaged;

5.5.3 That the fill adapter and vapor adapte r are securely attached to the risers;

5.5.4 That, where applicab le, the spring-loaded submerged fill tube seals properly against the coaxial tubing, and the dry break (poppet-valve) is not missing or damaged; and

5.5.5 That the submerged fill t ube is not missing or damaged.

Table 1 – Schedule of Maintenance Inspection Gasoline dispensed by the operation during largest monthly throughput of previous year Frequency of Inspections

A. Retail Gasoline Outlets 1. Less than 25,000 gallons One day per week 2. 25,000 gallons or greater Five days per week

B. Non-Retail Gasoline Outlets and ot her gasoline dispensing operations 1. Less than 2,500 gall ons One day per month
2. 2,500 to less than 25,000 gallons One day per week 3. 25,000 gallons or greater Five days per week

5.6 Bulk Plants and Loadi ng Racks at Bulk Plants

5.6.1 All bulk plants shall meet one of the following requirements:

5.6.1.1 Bulk plants not involved with aviation gasoline loading shall be equipped with an ARB certified vapor recovery system for loading operations (loading rack).

5.6.1.2 Bulk plants involved with aviation gasoline loading shall be equipped with a vapor recovery system that meets a minimum
volumetric control of 90% when measured in accordance with the test method specified in Section 6.4.9.

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4621 - 9 Proposed Amendments to Rule 4621 5.6.2 The loading rack vapor recovery sy stem shall not create a back pressure in excess of the pressure limits of the delivery vessel certification leak test (18 inches water column).

5.6.3 Operators shall store or dispos e of gasoline in closed, non-leaking

containers. The containe rs shall remain closed at all times except when depositing or removing the contents of the containers or when the container is empty.

5.6.4 Bulk Plant Leak Inspections

5.6.4.1 All bulk plants shall be construc ted and maintained in a leak-free

condition.

5.6.4.2 All bulk plants shall be inspect ed for leaks at l east once in every six-month period (from four to eight months apart) in accordance with the test procedur e specified in Section 6.4.3

6.4.2.

5.6.4.3 All loading racks located at bulk plants shall be inspected for leaks during product transfer at the frequency required in

Section 5.6.4.25.6.5.2.

5.6.4.4 If any storage container, storage container component, or loading rack component is found to leak during an inspection, the inspection frequency shall be changed to quarterly until the unit has successfully passed five consecutive quarterly inspections. Thereafter, the quart erly inspection may revert to the applicable inspection frequenc y specified in Section 5.6.4.2.

5.6.5 Bulk Plant Leak Repair

5.6.5.1 Upon detection of a leaking component, th e operator shall affix to that component a weatherproof readily visible tag with the

date and time of leak detecti on, the date and time of leak measurement, and for gas leaks, the leak concentration in

ppmv.

5.6.5.2 The tag shall remain affi xed to the component until all the conditions specified in Sections 5.6.5.3 and 5.6. 5.4 have been

met.

# PROPOSED December 19, 2013

4621 - 10 Proposed Amendments to Rule 4621 5.6.5.3 All leaking components shall be repaired or replaced within seven (7) business days after th e leak is detected. If the component cannot be repaired w ithin seven days, the operator must remove the leaking component(s) from VOC service.

5.6.5.4 Upon returning a leaking co mponent to service, the following

conditions must be met.

5.6.5.4.1 The component must be re-inspected using the test method specified in Sec tion 6.4.3 6.4.2; and

5.6.5.4.2 The component must be found to be in compliance with the requirements of this rule.

5.7 Delivery Vessels

5.7.1 All delivery vessels shall have an ARB certified vapor recovery system for cargo containers. Cargo containe r vapor recovery systems shall be

maintained and tested in accordance with manufacturer specifications and any applicable ARB Executive Orders.

5.7.2 No person shall operate, or a llow the operation of a delivery vessel

unless valid State of California decals which attest to the vapor integrity of the container are displayed.

5.7.3 No person shall store gasoline in, otherwise use, or operate any gasoline delivery vessel unless such vessel is de signed and maintain ed to be leakfree. Any delivery vessel into which gasoline vapors have been transferred shall be filled only from loading racks or other delivery vessels that are equipped with an AR B certified vapor recovery system.

5.7.4 The hatch on a delivery vessel sha ll be equipped with a leak-free cover

and the hatch shall not be opened for visual inspection unless at least three minutes have elapsed since lo ading or unloading has stopped. The dome hatch, once opened, shall not be held open longer than three minutes, except as directed by local, state, or federal agencies having jurisdiction.

5.7.5 Gasoline vapors shall not be purged into the atmosphere. This includes relieving container pre ssure by manually “popping” the poppet valve on the truck-mounted vapor return line.

5.7.6 Switch loading shall not be conducte d unless such transfer is made using a permanently installed ARB cer tified vapor recovery system.

# PROPOSED December 19, 2013

4621 - 11 Proposed Amendments to Rule 4621 5.7.7 During loading of the delivery ve ssel, the truck-mounted vapor return line shall be connected to a vapor recovery system that meets the requirements of this rule for the vapor recovery systems.

6.0 Administrative Requirements

6.1 Recordkeeping

6.1.1 All data necessary to demonstr ate qualifications for the exemptions

allowed in this rule shall be mainta ined on the premise at all times and shall be submitted for District, ARB, or EPA review upon request. Such

records shall include ex emption status and volume delivered to each stationary storage container serviced.

6.1.2 Bulk Plants and Loading Racks: A record of all inspections and all actions conducted on any pa rt of the storage cont ainer or loading racks shall be maintained in chronological order showing date of inspection, description and location of any equipment replaced , and a description of the problem which required repair.

6.1.3 Effective December 20, 2007, aAll bulk plants shall maintain daily gasoline throughput records.

6.1.4 All records required to demonstrat e compliance with the requirements of this rule shall be retained on the pr emises for a minimum of five years

and made available on site during normal business hours to the APCO, ARB, or EPA, and submitted to the APCO, ARB, or EPA upon request.

6.2 Testing Requirements

6.2.1 Operators shall conduct all perf ormance tests required by ARB Executive Order and facility insta llation and operations manua l as per the frequency outline therein or as designated by the APCO.

6.2.2 Each ARB certified Phase I vapor r ecovery system shall be performance tested within 60 days of completi on of installation or modification.

6.2.3 Bulk plants involved with aviati on gasoline loading subject to Section 5.6.1.2 shall be performance tested within 60 days of completion of

installation or modification.

6.2.36.2.4 Operators shall notify the District at least seven days prior to any performance testing.

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4621 - 12 Proposed Amendments to Rule 4621 6.2.46.2.5 Operators shall s ubmit all performance test results to the District within 30 days of test completion.

6.3 Certification Requirements

6.3.1 Installation and mainte nance contractors shall:

6.3.1.1 On and after J une 20, 2008, bBe certifie d by the ICC for Vapor Recovery System Installati on and Repair (VI) and make available onsite proof of ICC certification for VI, and

6.3.1.2 Have and make available on site pr oof of any and all certifications required by the a pplicable ARB Executive Order and installation and operation ma nual in order to install or maintain specific systems, or

6.3.1.3 Work under the direct and pe rsonal supervision of an individual physically present at the work site who possesses and makes

available onsite a current certificat e from the ICC, indicating he or she has passed the VI exam and all certifica tions required by the applicable ARB Executive Order.

6.3.2 All ICC certifications shall be renewed every 24 m onths by passing the appropriate exam specific to the certification being sought.

6.3.3 Effective on and after March 21, 2008, Gasoline Dispensing Fac ility Testers wishing to conduct vapor recovery system testing and repair at

facilities located within the District , shall be in fu ll compliance with District Rule 1177 (Gasoline Dispensi ng Facility Tester Certification).

6.4 Test Methods

6.4.1 The Reid Vapor Pressure of gaso line shall be determ ined in accordance

with ASTM D 5191-01.

6.4.2 The soap bubble method shall not be used by operato rs on and after March 1, 2008 for those operators th at use the soap bubble method to detect vapor leaks prior to Decembe r 20, 2007. On a nd after March 1, 2008, operators shall use the method in Section 6.4.3 to detect leaks.

6.4.3 6.4.2 Measurements of leak c oncentrations, excepting delivery vessels, shall be conducted according to EP A Method 21 using an appropriate portable hydrocarbon detection instrume nt calibrated with methane.

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4621 - 13 Proposed Amendments to Rule 4621 6.4.3.1 6.4.2.1 The instrument shall be calibra ted in accordance with the procedures specifi ed in EPA Method 21 or the manufacturer’s instruction, as appropriate, not more than 30 days prior to its use.

6.4.3.2 6.4.2.2 The operator shall record the calibration date of

the instrument.

6.4.4 6.4.3 Measurements of leak concen trations for delivery vessels shall be conducted according to the ARB Test Procedure for Determination of Leaks, TP-204.3.

6.4.5 6.4.4 Static Leak Test for Un derground Tanks: ARB Test Procedure

TP-201.3.

6.4.6 6.4.5 Static Torque of Rota table Phase I Adaptors: ARB Test

Procedure TP 201.1B.

6.4.7 6.4.6 Leak Rate of Drop Tube/Drain Valve Assembly: ARB Test

Procedure TP 201.1C.

6.4.8 6.4.7 Leak Rate of Drop Tube Overfill Pr otection Devices and Spill

Container Drain Valves: ARB Test Procedure TP 201.1D.

6.4.9 6.4.8 Static Leak Test for Above ground Tanks: ARB Test Procedure TP206.3 or ARB Test Procedure TP-201.3B as applicable.

6.4.9 Determination of Em ission Factor of Vapor Recovery Systems of Bulk

Plants: ARB Test Procedure TP-202.1.

6.5 Versions of Test Methods

All test procedures shall be conducted in accordance with the la test version of the test procedures, or their equivalents as approved in writing by the APCO and EPA.

7.0 Compliance Schedule

Except as specified in this rule , all provisions of this rule shall remain in effect on and after December 20, 2007.

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