Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 118 - GASOLINE DISPENSING FACILITIES VAPOR CONTROL › Appendix 096-118-A - REQUIREMENTS FOR DISCONTINUING THE USE OF A STAGE II VAPOR RECOVERY SYSTEM

Current through 2024-29, July 17, 2024
The owner or operator of a gasoline dispensing facility
				  equipped with a Stage II vapor recovery system must complete the following
				  steps when discontinuing the use of a Stage II vapor recovery system.All tests
				  are based on CARB's test requirements: ST-30: Leak Test Procedure; TP-201.3:
				  Determination of 2 inch (wc) Static Pressure Performance of Vapor Recovery
				  Systems of Dispensing Facilities; and TP-201.4: Determination of Dynamic
				  Pressure Performance of Vapor Recovery Systems of Dispensing Facilities. In all
				  cases, specifics are to be discussed with the Department's Air Bureau staff
				  prior to abandonment.
1. Provide the
				Department with a written request for approval prior to disabling the
				system.
2. Notify the Department at
				least five (5) days prior to the date of the initial test (may be verbal). All
				tests must be conducted Monday through Friday during normal business hours
				unless otherwise approved by the Department. The Department may observe the
				test at its discretion. The notification shall include the gasoline dispensing
				facility name, location, time and date of test, test company and the name of
				the tester(s) and the Maine Certified Tank Installer or inspector, if
				different, who will be present or conducting the test and performing the Stage
				II abandonment.
NOTE: Stage II abandonment shall be conducted pursuant to
Rules for Underground Oil Storage Facilities
06-096 CMR 691.
				  The Department's Policy for Abandonment of Stage II Gasoline Vapor Recovery
				  Piping at Underground Oil Storage Facilities, dated November 5, 2009 provides
				  discretion in piping removal.
3. Pressurize the entire tank and vapor line
				ullage space using nitrogen gas to a pressure of 10 inches of water column.
				Once stabilized, wait five (5) minutes and record the final pressure. Compare
				the final pressure to the allowable pressure drop found in the leak rate table
				in CARB'S ST-30: Leak Test Procedure, also available from the Department. If a
				pass is obtained, continue to step 4. If the system fails, repeat the test to
				confirm the failure, and troubleshoot for leaks. If the failure is caused by a
				leak in the underground Stage II vapor piping, the piping must be
				removed.
4. Conduct a "wet"
				blockage test undereach dispenser in accordance with CARB'S TP-201.4:
				Determination of Dynamic Pressure Performance of Vapor Recovery Systems of
				Dispensing Facilities which measures backpressure in the returning vapor line.
				This is accomplished by opening the vapor recovery poppet on the tank pad and
				pouring two gallons of gasoline directly into the dispenser end of the vapor
				line and waiting for up to 15 minutes. This is followed by flowing nitrogen at
				60 Standard Cubic Feet per Hour (scfh). A passing test shows results less than
				or equal to 0.35 inches of water column. If the test passes, proceed to step 5.
				If a fail is recorded, repeat the test to verify the failure and then flow
				nitrogen gas through the blocked vapor line for ten seconds. Check the
				backpressure again to verify the block is cleared or not. If cleared, repeat
				the wet blockage procedure to confirm results; if still blocked, the
				underground vapor piping must be removed.
5. Replace Stage II hanging hardware with
				conventional hanging hardware making sure to drain any product prior to
				disconnecting the Stage II hanging hardware from the dispenser.
6. Disconnect the vapor line from each
				dispenser and cap the end of the line at or below the base of the dispenser
				with an approved fitting. If the tank end of the vapor line is accessible, cap
				the tank end also.
7. Replace the
				Stage II pressure vacuum cap with an approved Stage I cap.
8. Providing the station has exceeded the
				100,000 gallon per month threshold beginning January 10, 2008, station
				owners/operators must ensure that all fill and vapor adaptors are designed to
				prevent overtightening or loosening by installing swivel adaptors or equivalent
				adaptors that meet the requirements of 40 CFR Part 63, Subpart
				CCCCCC.
9. Conduct a pressure decay
				test and pressure/vacuum vent valve test as described in Sections 8(A) and 8(B)
				of this Chapter.
10. Submit the
				test results to the Department within thirty (30) days of the test.