aireaquatanksecologicalvirginiacompartment ECOLOGICAL TANKS, INC. AQUA AIRE ® Concrete Class I Wastewater Treatment Plants OWNER’S MANUAL Patent Pending Model AA500 Model AA500-32 Model AA500-3575 Model AA500T Model AA500-35 Model AA500-4050 Model AA750 Model AA750T Model AA500-4075 “Copy...