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Veeder=Root • <br />m tusk* sat• vain Housing . <br />serviceable Fitter <br />Active Carbon Bed <br />41nch plenum, Bottom & Top <br />• Installs on the vent -stack <br />• Vertically -mounted cylindrical container with activated <br />carbon <br />• Inlet to carbon chamber at bottom of canister from <br />vent pipe <br />• Outlet from carbon chamber to atmosphere at top of <br />canister via solenoid controlled valve and fixed -sized <br />orifice <br />• Valve & control module has intrinsically -safe electrical <br />connection to TLS <br />• TLS monitors containment ullage space pressure BENEFITS <br />• When pressure is positive (nighttime low or no <br />dispensing), TLS opens valve to reduce pressure ® Balance s1v <br />stem <br />• Vapor/air mix flows into canister <br />• Fewer permit concerns <br />• HC's adsorb (load) onto carbon <br />• Cleansed air is vented to atmosphere Quicker EVR installation <br />• When pressure is negative (daytime dispensing), TLS <br />holds valve open to purge HC's from carbon ® Lower equipment cost <br />■ Air from atmosphere flows into top of canister <br />• HC's desorbs (purge) from carbon Lower installation cost <br />■ NC's return to ullage space in UST's <br />L713 —' '10 -11 <br />C <br />