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PROJECT : Ahern Road Fueling Station February 28 , 2022 <br /> Job No : 20 -544 Ross P. Shoaf, Civil Engineer <br /> 3225 gpd ( average daily flow ) / . 786 g/sf = 4, 103 sf of disposal area . For final design 4 , 320 sf of <br /> trench will be used . The disposal field will consist of 6 alternately dosed zones each containing <br /> 360 lineal feet of 2 ' trench . ( 6x360' x2' = 4, 320 sf) <br /> The system flow is as follows : Effluent from the building will enter either the grease trap or the <br /> Septic tank directly. The flow will then go into a pre-Anoxic tank where it will be mixed with <br /> primarily treated effluent and any needed Alkalinity before entering the First Recirculation <br /> Tank . The Effluent in the First Recirculation Tank is recirculated over the Primary Filter bank <br /> until the level reaches the required height and then is shunted to the Post-Anoxic Tank . The <br /> Post-Anoxic tank them feeds the Secondary Recirculation Tank which in turn recirculates the <br /> effluent over the Secondary Filter Bank . The treated Effluent is then shunted to the Dosing <br /> Chamber that Doses the treated effluent into the Leach Filed area through a flow meter and <br /> indexing valve . <br /> Page 4 Of 11 <br />