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OAR Box 1147 

Prepped by Ollie Stewart 

Document Number: 

144)IV-E-17 

Docket Number: 

A-87-11 

Printed 4/22/2008 2:42:55 PM Sheet 144 of 242 
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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

ANN ARBOR. MICHIGAN 48105 

OFFICE OF 

AIR AND RADIATION 

JAN 51988 

MEMORANDUM 

SUBJECT: Meeting with Glenn Moore, OPW 

FROM: John W. Mueller, Mechanical Engineer 

Standards Development and Support Branch 

TO: 

THRU: 

Public Docket A-87-11 

John F. Anderson, Senior Project Manager 

Standards Development and Support Branch UL_ 

On November 16, 1987 Kathy Steilen, John Anderson and I 

met with Glenn Moore, Vice President-Technical Liaison of OPW 

to discuss a variety of topics related to service stations and 

Stage II vapor recovery equipment. To open this meeting Mr. 

Moore provided Kathy with some data on 1984 California service 

station fires. Following this was a lengthy discussion on 

certification of Stage II systems in California and an 

explanation of OPW's vapor recovery nozzle operation. 

Concerning California certification of Stage II systems, 

Mr. Moore explained that there are three organizations which 

generally get involved in the certification process. The 

first, the State Fire Marshal's office, will generally approve 

of a piece of equipment if it is approved by the Underwriters 

Lab and meets the National Fire Protection Association's (NFPA) 

code 30A. Underwriters Lab tests such things as the automatic 

shutoff, pressure shutoff and insertion 

correction operation and durability and will 

up with in-use testing about four times a year. 

Service Station Code," is a set of 

many aspects of service station design 

and equipment. This code is designed to provide guidelines 

through which explosion and fire hazards may be minimized. 

interlocks for 

generally follow 

NFPA code 30A, 

"Automotive and Marine 

specifications covering 
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The second organization involved in certification is the 

Division of Measurement Standards (of the California Department 

of Food and Agriculture) which runs two tests on a Stage II 

system. The first test, known as the 10 click test, involves a 

simulated gas tank which is filled up to the nozzle sensing 

port triggering automatic shutoff. After the shutoff has been 

triggered on attempt is made to turn on the nozzle 10 times. 

No more than 0.10 gallons of fuel is allow to flow during these 

ten "clicks". The second test performed by the Division of 

Measurement Standards is performed on a random sampling of 300 

vehicles. After each vehicle is refueled the vapor line is 

drained to determine how much liquid fuel is left in it. The 

amount of fuel left in the vapor line after each refueling 

event cannot exceed 0.20 percent of the total fuel dispensed to 

that vehicle and the total amount of fuel left for all 300 

vehicles cannot exceed 0.02 percent of the total dispensed to 

them. 

The last group to test a Stage II system is the California 

Air Resources Board which performs a test to evaluate the 

efficiency of the system at capturing refueling emissions. 

The primary purpose for Mr. Moore's visit was to explain 

how the various features of the OPW 11-V vapor recovery nozzle 

functioned. For this purpose he had a cutaway nozzle which 

clearly displayed the moving parts of the pressure shutoff and 

portions of the insertion interlock. This nozzle made it much 

easier to visualize the operation of these features. Glenn 

stated that we could borrow this nozzle if we felt it would be 

useful for presentations.