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Issue Date: April 18, 1997
Revision Date: September 11, 1998
Bell Avon,
Inc.
VIGILANT Leak Detection System
CONTINUOUS INTERSTITIAL TANK
SYSTEM MONITORING METHOD (PRESSURE/VACUUM)
| Certification |
Leak rate of 0.1
gph with PD = 100% and PFA = 0%. |
| Leak
Threshold |
System alarms
when changes in interstitial vacuum exceed a predetermined change in slope
versus time curve. |
| Applicability |
Gasoline, diesel,
aviation fuel, fuel oil #4, waste oil. |
| Tank
Capacity |
Maximum of 15,000
gallons based on interstitial volume resulting when flexible liner is
properly fitted and held in position against rigid tank wall.
No minimum product level during test. |
| Waiting
Time |
Minimum of 20
minutes between delivery and testing. |
| Test
Period |
Minimum of 40
minutes. |
| Comments |
System is located
within the interstitial space between a properly fitted and installed
flexible liner inside a rigid tank.
Flexible liner is held in position by maintaining a vacuum on interstitial
space.
Interstitial space is tested continuously.
System allows for permeation of vapor from stored substance into
interstitial space.
Vapor discharged from vacuum pump must meet applicable air quality
standards.
Vapor recovery of product vapor from interstitial space is feasible when
required.
System detects breaches in either flexible internal liner or rigid tank
walls.
This system may not be compatible with all secondarily contained tanks
and/or piping. Always consult with the tank and/or piping manufacturer and
the manufacturer’s applicable recommended installation practices before
installing this system, or damage may be caused to the tank or piping by its
use. |
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Bell Avon, Inc.
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Evaluator:
Ken Wilcox Associates
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1200 Martin Luther King,
Jr. Blvd.
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Tel: (816) 443-2494
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Picayune, MS 39466-5427
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Date of Evaluation:
11/16/95
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Tel: (601) 799-1217
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