accordance with NFPA 30 with stainless steel main spring, fusible link, and
test port.
2.5
LEAK DETECTION MONITORING SYSTEM
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NOTE: Indicate panel location on drawings.
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Provide continuous surveillance leak detection system suitable for
operation in an NFPA 70, Class l, Division l, Group D environment and
located in the leak containment space between interior and exterior walls
of double-wall piping. System shall detect leakage into containment space
by monitoring interstitial pressure, vacuum variations, or sense
hydrocarbon vapors electronically. Sensor output and transmission shall be
electronic. Sensors shall be compatible with and detect leakage of
materials stored in pipe at a rate of 0.105 milliliter per second 0.1
gallons per hour with 95 percent probability of detecting this size leak
and five percent probability of declaring pipe leaking at this rate when,
in fact, it may be leaking less as well as ground water which may leak
through secondary containment. [System shall be capable of monitoring
[_____] zones through use of one central remote panel.] Panel shall be in
a NEMA enclosure suitable for the environment and have an audible and
visual alarm for each zone and include acknowledgement switch and
rechargeable battery backup capable of operating the system continuously
for a minimum of 48 hours. Panel shall incorporate self-test system which
permits operator verification of proper operation of leak detection
equipment. Mount panel as indicated. Enclose underground cable in PVC
coated conduit. Provide instructions and equipment required for
calibration of leak detection system and manufacturer's recommend
calibration maintenance schedule.
2.6
DISPENSING SYSTEM
Computer controlled dispensing system shall consist of product dispensing
units, management control systems, printers, necessary computers,
microprocessors, wiring, cabling, and accessory equipment.
2.6.1
Product Dispensing Units
Provide computer controlled, lighted, [single] [double] sided, remote type,
with [one] [two] [three] [four] [_____] hose outlets [each] suitable for
single product delivery flow rate of 0.76 liter per second 12 gallons per
minute from each nozzle. Steel frame shall be capable of resisting normal
vertical and lateral loads and secured to dispensing island with at least
two 15 mm 1/2 inch anchor bolts. Exterior panels shall be either stainless
steel or steel with baked enamel finish, or combination of the two.
Provide manufacturer's standard microprocessor which has the following
functions:
a.
Displays: Solid state liquid crystal displays (LCD'S), five-digit
cash display to 9.99, with automatic shutdown, and four-digit
volume display to 999.9 liters 999.9 gallons.
b.
Totalizer: Eight-digit (999,999.99) electronic totalization with
identification for each product volume in liters gallons.
c.
Price setting: Price-jog keyswitch on each computer housing to
enable remote price setting from management control system.
SECTION 15193N
Page 10
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