### UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 1



### Janmy 

### 22, 19'JJ

Jeff Crawford JOHN F. KENNEDY FEDERAL BUILDING BOSTON, MASSACHUSETIS 02203-0001



### Bureau of Air Quality Control Department of Environmental Protection State House, Station No. 17 

### Augusta, ME 04333 

### Dear Mr. Crawford: Previously, the Maine Department of Environmental Protection (DEP) proposed revisions to its Chapter 111 

### "Petroleum Liquid Storage Vapor Control" regulation and EPA provided comments to DEP 1n a letter dated August 14, 1998. 

### DEP is currently conducting an additional 30 

### day comment period on a revised draft of Chapter 111. 

### EPA has reviewed the revised draft rule and does not have any comments. If you have any questions on this issue, please contact Anne Arnold at (617) 918-1047. 

### Sincerely, 

# b -J''L·J

# &**~.** Conr y,

# Man~r Air Quality Planning Unit

cc: Carolyn Wheeler, ME DEP

lntemet Address (URL) • http://www.epa.gov Recycled/Recyclable • Printed with Vegetable OU Based Inks on Recycled Paper (Minimum 25% PostconsumeryJAN-07-1999 09=10 06-096 

### Chapter lll:

1. 

### Scope 77826 " 207 287 764 P.02/04 

### .r¥-RTMENTOF ENVIRONMENTAL

## PR~CTION PETROLEUMLIQUID STORAGE VAPOR CONTROL SUMMARY: This regulation requires 

### all owners of fixed roof storage tanks, storing gasoline, crude oil or any petroleum liquid whose vapor pressure is greater than 1.52 psia (10.5 kilo pascals) to install floating roofs to reduce the hydrocarbon vapors losttothe atmosphere. ·

A. This regulation shall be applicable applies in all ambient air quality regions of the State of Maine_ B. This regulation shall a13ply applies to all fixed roof storage vessels with capacities greater than 150,000 liters (39,000 gallons) containingvolatile petroleum liquidswhose truevaporpressure is greater than 10.5 kilo pascals (1.52 psia) or a Reid vapor pressure of 4 psi. Such fixed roof storage vessels are subjecttoNew Source Performance Standards as of

### the dates specified in and in accordance withtherequirements contained in

### 40 CFR, Part 60, Subparts K, Ka, and Kb. C. Section 5(B) ofthis regulation shall apply to all fixed roofstorage vessels with capacities greater than 150,000 liters (39,000 gallons) containing volatile petroleum liquids whose true vapor pressure is b'Teaterthan l.O psiabutless than 1.52 psia. 2. Prohibition. No owner or operator ofa fixed roof storage vessel shall permit or suffer the use of such vessels unless: A. The vessels have been retrofitted with an internal floating roofequipped with a closure seal, or seals, to reduce the visual space between the roofedge and tank wall; or the vessels have been retrofitted with equally effective alternative control as approved by the Commissioner and the United StatesEnvironmental Protection Agency; 

### B. 

### The vessel is maintained such that there are no visible holes, tears, or other openings in the 

### seal orany seal fabric ormaterials; C. All openings except stub drains areequipped with covers, lids, or seals such that: (1) the cover, lid, or seal is in the closedposition atall times exceptwhen

### in actual use; 

### aOO- (2) automatic bleeder vents are closed at all times except when the roofis being floated off or beinglanded onthe roofleg supports; and (3) rim vents, ifprovided, are set to open only when the roof is being floated offthe roof leg supports or atthemanufacturer's recommended setting; D. Routine visual inspections are conducted through roofhatches once every**~months** month; and E. A complete inspection ofcover and seal is soF.Jtlt:teted at least 

### eflee per yeaF performed at least every ten (10)years and each time the vessel is emptied and degassed. Floatingroof**in.~pections**JAN-07-1999 09=10 06-096 77826 , 207 287 764 P.03/04 

### pt.(RTMENTOfENVIRONMENTAL

### PRdllf::TION

shall be conducted by visually inspectingthe floating roofdeck. deck fittings. and rim seals from within the storage vessel. The inspection may be performed entirely from the top side ofthe floating roof, as long as there is visual**~~cess** to all deck**component~** 3. Emission Testing. The determination of compliance under this section may be made by visual inspection of the floating cover through the roof hatches by Department staff or other qualified representatives oftheDepartment. The source shall be found in compliance if: A. The seal has no visible holes, tears., or other openings and is uniformly in plac:e around the circumference ofthe coverbetweenthe cover and tank**well~** B. The cover is uniformly floating on or above the liquid and there are no visible holes, tears, or otheropenings in the surface ofthe cover and no liquid is accumulated on the cover; and C. All records are beingproperly maintained. 4. Transition Schedule. The owner or operator oft1xed-roofpetroleum storage vessels located in Air Quality Control Regions Ill, IV and V shall have until July l, 1991, to complywith tht: requirements under subsection 2, paragraph A. In Air Quality Control Regions III, IV and V, the owner or operator ofa fixed-roofpetroleum storage vessel without a :floating roofor other acCCJptable volatile organic compound emission control equipment shall adhere to the increments ofprogress contained in the following schedule and shall reportto the departmentwithin 

### 15 days ofthe prescribed deadline the status ofcompliance with 

### the each increment ofprogress. A. Final plans for the floating roo(. other necessary modifications or other acceptable volatile organic compound emission control equipment shall be submitted beforeNovember 1, 1989. B. Contracts for installation of the floating roof, other modifications or other acceptable volatile organic compound emission control equipment or purchase orders for component parts shall be issued before March 1, 1990- C. Initiation ofon-site construction or installation ofacceptable volatile organic compound emission control equipment shall begin before July 1, 1990. ]). Final compliance shall be achieved beforeJuly I, 1991. 5. Records A. The owner or operator ofa fixed roofstorage vessel eo¥ereel 

### ttBder the**seo~e** of**~wemed** by this regulation shall assure the following records are maintained for a minimum oftw.:> years_ These records shall be available for inspection during normal business hours and copies shall be providedto the Commissionerorhis representative upon request: (1) Reports oftheresults ofinspections conducted underparagraphs (2)(D) and (2)(E); (2) A record ofthe monthly throughput quantities and types of volatile petrolc:um liquids for each storage vessel and period ofstorage; and

Chapter I11: Petrolewn Liquid Storage Vapor Control

- 2-JRN-07-1999 09:11 

### 06-096 ' 77826 ' 207 287 764 p.04/04**~RTMENT** 

### OF ENVIRONMENTAL**PR~TlON** 

### (3) Records ofthe**averag~** 

### monthly storage temperatures and true vapor pressures of volatile petroleum I

### iquids stored. B. The owner or operator of a tixed roof storage vessel with capacity greater than**~50,000** 

### liters (39,000 gallons) containing volatile petroleum liquids whose true vapor pressure is greater than 1.0 psia but less than 1.52 psia. shall assure the following records are maintained for a minimum oftwo years. These records shall be available for inspection during normal busin,ess hours and copies shall beprovided tothe Commissionerorhisrepresentative upon request: (1) Records of the average monthly storage temperatures, the type of petroleum liquid, and maximum true vapor pressures ofvolatile petroleum liquids stored.

AUTHORITY: 38 M.R.S.A., Section 585, 585-A EFFECTIVEDATE: May 7, 1979 Amended: September21, 1988 Amended: October 3, 1989 Amended: November3, 1990 Amended:

BASIS STATEMENT Gasoline is a hydrocarbon vapor that aids the formation ofozone in the atmosphere. lt is necessary to control such hydrocarbon vapors present in the atmosphere because Maine is violatingthe federal ozone ambient air quality standard. This regulation controls the maximum amount ofgasoline emissions so to reduce the ozone formed. BASIS STATEMENTFORAMENDMENT OFAUGUST 10, 1988 This amendment expanded the scope of the regulation to include all Ambient Air Quality Control Regions in the State. Uncontrolled gasoline storage terminals in the Downeast and Central Maine Ambient Air Quality Control Regions have been estimated as emitting over 800 tons ofhydrocarbons annually. The use oftloating roofs and vapor control systems (Chapters 111 and 112) for bulk gasoline terminals is considered BestPractical Treatment and will reduce emissions by about 94 percent. BASIS STATEMENTFORAMENDMENT OF SEPTEMBER27, 19891 

### This amendment corrected certain minor deficiencies identified by the U.S. Environmental Protection Agency in the State implementation Plan and for consistencywith State statute. The U.S. Environmental Protection Agency also commented on requiring facilities which store more than 39,000 gallons of petroleum products with a true vapor pressure greater than 1.0 psi to maintain records of the average monthly temperature and the maximum true vapor pressure. The Department agrees with the comment. This will 

### enable the Departmentto determine ifstorage tanks storing liquids with vapor pressure closeto l.52 psi are subjectto the regulation.

Chapter 111: PetroleumLiquid Storage Vapor Control

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