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California Air Resources Board
Workshop
November 3, 2004
1927 13th Street, Room 202
1:30 - 3:30 p.m.
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda• Welcome and Introductions
• Overview
• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline
• Contact Information
• Open Discussion
Aboveground Storage TankEnhanced Vapor Recovery
2
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda
• Welcome and Introductions• Overview
• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline
• Contact Information
• Open Discussion 3
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda• Welcome and Introductions
• Overview• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline
• Contact Information
• Open Discussion 4
Purpose of Enhanced Vapor Recovery (EVR) for Aboveground
Storage Tanks (ASTs)
• To seek additional emission reductions from gasoline marketing operations by increasing the stringency of standards and specifications
• To improve the performance and reliability of vapor recovery equipment
Overview
5
Overview
In 2000, the Board approved EVR regulations for underground gasoline storage tanks (USTs).
A new rulemaking is required to implement EVR for aboveground gasoline storage tanks (ASTs).
6
Overview
EVR for ASTs is necessary to:
• Ensure maximum feasible emissions reductions are achieved
• Improve quality, reliability and durability of AST vapor recovery systems
• Provide consistency with the UST EVR program
7
OverviewA S T
Examples
1000 Gallon Single Wall AST
250 Gallon AST on Stand
8
Overview
2000 Gallon Protected Tank
A S T Examples
12,000 Gallon Protected Tank
4,000 Gallon Single Wall with Processor
9
Overview
Proposed AST EVR Performance Standards and Specifications
• Draft Certification and Test Procedures are available on the ARB Vapor Recovery website, but will be revised pending further testing and monitoring data.
10
Overview
Previous Inventory Efforts
• Revisited inventory in response to industry concerns – Tank population inventory– Emission inventory
11
Overview
Status of AST EVR
• Conducting further studies on:– Tank population inventory– Emissions inventory – Controls– Cost
12
Overview
Status of AST EVR •Focus of today’s workshop
– Tank population inventory– Emissions inventory
•AST proposed regulation and cost analysis will be discussed in future workshops
13
Overview
Questions
?
14
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda
• Welcome and Introductions
• Overview
• Tank Population Inventory• Emissions Inventory
• Rulemaking Timeline
• Contact Information
• Open Discussion15
Tank Population Inventory
• Desired information• Our approach to acquire information• Pilot Survey & Summary• Survey timeline
Overview
16
Tank Population Inventory
• Size distribution• Location• Control level• Type of tank
Desired Information
17
Tank Population Inventory
• Districts• Water Board• Board of Equalization• Energy Commission• AST Manufacturers• Fuel Carriers
Approach to Acquire Information
18
Tank Population Inventory
• Identify fuel carriers– 473 carriers identified by CARB– each carrier was contacted
• Identify gasoline carriers to AST– 188 carriers deliver gasoline to AST
Approach to Acquire Information
19
Tank Population Inventory
• With California Independent Oil Marketers Association (CIOMA)– Develop pilot survey
• Randomly select carriers– 32 carriers received pilot survey
Pilot Survey
20
Tank Population Inventory
• 32 companies received survey• 15 companies returned survey• 8 companies returned survey with
tank information• 466 tanks identified
Pilot Survey Summary
21
Tank Population Inventory
350 or less 72351 to 500 54501 to 750 213
751 to 1000 671001 to 2000 24
> 2000 36Total 466
Tank size in gallons
Number of ASTs
Pilot Survey Summary
22
Tank Population Inventory
farm marina other unknown
350 or less 59 0 13 0351 to 500 32 0 22 0501 to 750 172 0 41 0751 to 1000 46 0 21 0
1001 to 2000 9 0 15 0> 2000 18 6 9 3Totals 336 6 121 3
Tank LocationTank size in gallons
Pilot Survey Summary
23
Tank Population Inventory
350 or less 9 0 63351 to 500 19 4 31501 to 750 43 19 151751 to 1000 18 15 341001 to 2000 9 14 1
> 2000 17 18 1Totals 115 70 281
Tank size in gallons
Phase I unknownPhase II
Pilot Survey Summary
24
Tank Population Inventory
350 or less 59 0 13351 to 500 33 5 16501 to 750 161 21 31751 to 1000 41 15 11
1001 to 2000 9 14 1> 2000 11 17 8
Totals 314 72 80
unknowndbl wall or insulated
single wall
Tank size in gallons
Pilot Survey Summary
25
Tank Population Inventory
Fuel Carrier:Contact Name:Phone Number: April 2003 & October 2003FAX: November 2003 & March 2004email: Or the total gallons delivered in 2003
on ground
on stand (gravity
dispensing)
farm marina other
350 or less351 to 500501 to 750751 to 1000
1001 to 20002001 or greater
2For this survey a tank encased in concrete is an insulated tank.
Number of gallons of gasoline you delivered to all AST's between:
Tank Location
1You can use a block on the form to group the AST(s) by the city or county where they are located or use a separate block for each tank.
The following information is needed for gasoline deliveries to aboveground storage tanks (AST)
An Aboveground Storage Tank (AST) is a tank not covered by dirt or other fill. An AST can have many different looks and configurations. But the common factor in all AST's is that they are not buried, the sides and tops have air touching them not dirt or fill.
City (or county)
where the AST(s) is/are
located1
Tank size in gallons
number of ASTs
Phase I vapor
recovery only
Phase I & Phase II
vapor recovery
Single WallInsulated2
or double wall (such
as concrete)
Survey Form
26
Tank Population Inventory
• Changes to survey need to be submitted by November 10, 2004 to:
CARB - MLDAttn: LaMar MitchellP.O. Box 2815Sacramento, CA 95812
• [email protected]• PHONE: 916-445-9371• FAX: 916-324-4457
Timeline
27
Tank Population Inventory
• Survey mailed to all fuel carriers with AST accounts by mid November
• Survey returned by mid December
Timeline
28
Tank Population Inventory
Questions
?
29
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda
• Welcome and Introductions
• Overview
• Tank Population Inventory
• Emissions Inventory• Rulemaking Timeline
• Contact Information
• Open Discussion30
Emission Inventory
• Build a population picture– Use picture to develop emission
inventory
What are we going to do with the tank population
information?
31
Emissions Inventory(Baseline Emissions Estimate)
32
<350 gal
Single-Wall Tank Emissions(# tanks * emission factor)
351-500 gal
AST Population
Protected Tank
<350 gal
Location (i.e. county)
Protected Tank Emissions(# tanks * emission factor)
351-500 gal
Single-Wall Tank
Statewide Baseline Emissions Estimate
Location (i.e. county)
Location (i.e. county)
Location (i.e. county)
Location (i.e. county)
Location (i.e. county)
• AST Emission Factor Approach– Determine AST emission
factors using the U.S. EPA Tanks Emissions Estimation Program (AP-42)
– Suggested by industry
Emissions Inventory
33
• U.S. EPA Tanks Emissions Estimation Program (AP-42) – Emission estimating equations
were developed by the American Petroleum Institute (API)
– Estimates emissions from organic liquid storage tanks
– http://www.epa.gov/ttn/chief/ap42/ index.html
Emissions Inventory
34
• U.S. EPA Tanks Emissions Estimation Program (AP-42) – Designed for single-wall tank
application– Can be used for protected tank
application• Requires fuel surface temperature
measurements
Emissions Inventory
35
• AP-42 Data Collection – In August 2004, ARB installed
monitoring equipment on 5 ASTs– Parameters measured include:
• fuel surface temperature,• ullage pressure and temperature,• barometric pressure, and• ambient temperature.
Emissions Inventory
36
– AST Monitoring status:•5 ASTs monitored
– 4 protected (500-8,000 gallon capacities, different manufacturers, different insulation characteristics)
– 1 single-wall (250 gallon capacity, on stands, no vapor recovery, open vent)
•Data collected from August through November 2004
•Preliminary data analyses in January 2005
Emissions Inventory
37
Emissions Inventory (Preliminary Data from a Single-Wall Tank)
50
60
70
80
90
100
110
9/1
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9/7
9/7
9/7
Day (2004)
Tem
pera
ture
(F
) AmbientTemp(°F)
GasolineSurfaceTemp(°F)
38
Emissions Inventory(Preliminary Data from a Protected Tank)
60
65
70
75
80
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90
95
100
105
110
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9/1
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9/6
9/6
9/6
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9/7
9/7
9/7
9/7
Day (2004)
Tem
pera
ture
(F
) AmbientTemp(°F)
GasolineSurfaceTemp(°F)
39
• Emission factor stakeholder review– Assemble Stakeholder Review
Team– Summarize preliminary data and
emission factors– Schedule meeting (early 2005)
Emissions Inventory
40
Emissions Inventory
Questions
?
41
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda
• Welcome and Introductions
• Overview
• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline• Contact Information
• Open Discussion42
Rulemaking Timeline
• Future AST EVR Workshops– Spring 2005 – Summer 2005
• Board Hearing Scheduled for Early 2006
• Staff Report Release Date: 45 days prior to Board Hearing43
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda• Welcome and Introductions
• Overview
• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline
• Contact Information• Open Discussion
44
Contact InformationGeneral AST Information• Joe Guerrero (916) 324-9487
[email protected]• Stephanie Connelly (916) 445-9308 [email protected]
Tank Population• LaMar Mitchell (916) 445-9371
Emission Inventory• Jim Watson (916) 327-1282
45
Contact Information
Need More Information?
• ARB Vapor Recovery Website:– www.arb.ca.gov/vapor/vapor.htm
• ARB Aboveground Storage Tank Website:– www.arb.ca.gov/vapor/ast/ast.htm
46
Aboveground Storage TankEnhanced Vapor Recovery
Workshop Agenda
• Welcome and Introductions
• Overview
• Tank Population Inventory
• Emissions Inventory
• Rulemaking Timeline
• Contact Information
• Open Discussion47