california air resources board workshop november 3, 2004 1927 13th street, room 202

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

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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).

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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

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OverviewA S T

Examples

1000 Gallon Single Wall AST

250 Gallon AST on Stand

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Overview

2000 Gallon Protected Tank

A S T Examples

12,000 Gallon Protected Tank

4,000 Gallon Single Wall with Processor

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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.

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Overview

Previous Inventory Efforts

• Revisited inventory in response to industry concerns – Tank population inventory– Emission inventory

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Overview

Status of AST EVR

• Conducting further studies on:– Tank population inventory– Emissions inventory – Controls– Cost

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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

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Overview

Questions

?

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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

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Tank Population Inventory

• Size distribution• Location• Control level• Type of tank

Desired Information

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Tank Population Inventory

• Districts• Water Board• Board of Equalization• Energy Commission• AST Manufacturers• Fuel Carriers

Approach to Acquire Information

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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

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Tank Population Inventory

• With California Independent Oil Marketers Association (CIOMA)– Develop pilot survey

• Randomly select carriers– 32 carriers received pilot survey

Pilot Survey

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Tank Population Inventory

• 32 companies received survey• 15 companies returned survey• 8 companies returned survey with

tank information• 466 tanks identified

Pilot Survey Summary

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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

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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

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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

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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

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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

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Tank Population Inventory

• Changes to survey need to be submitted by November 10, 2004 to:

CARB - MLDAttn: LaMar MitchellP.O. Box 2815Sacramento, CA 95812

• lmitchel@arb.ca.gov• PHONE: 916-445-9371• FAX: 916-324-4457

Timeline

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Tank Population Inventory

• Survey mailed to all fuel carriers with AST accounts by mid November

• Survey returned by mid December

Timeline

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Tank Population Inventory

Questions

?

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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?

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Emissions Inventory(Baseline Emissions Estimate)

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<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

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• 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

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• 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

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• 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

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– 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

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Emissions Inventory (Preliminary Data from a Single-Wall Tank)

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Day (2004)

Tem

pera

ture

(F

) AmbientTemp(°F)

GasolineSurfaceTemp(°F)

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Emissions Inventory(Preliminary Data from a Protected Tank)

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Day (2004)

Tem

pera

ture

(F

) AmbientTemp(°F)

GasolineSurfaceTemp(°F)

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• Emission factor stakeholder review– Assemble Stakeholder Review

Team– Summarize preliminary data and

emission factors– Schedule meeting (early 2005)

Emissions Inventory

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Emissions Inventory

Questions

?

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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

jguerrer@arb.ca.gov• Stephanie Connelly (916) 445-9308 saconnel@arb.ca.gov

Tank Population• LaMar Mitchell (916) 445-9371

lmitchel@arb.ca.gov

Emission Inventory• Jim Watson (916) 327-1282

jwatson@arb.ca.gov

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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

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Aboveground Storage TankEnhanced Vapor Recovery

Workshop Agenda

• Welcome and Introductions

• Overview

• Tank Population Inventory

• Emissions Inventory

• Rulemaking Timeline

• Contact Information

• Open Discussion47