Laserfiche WebLink
§ 8.30 <br /> <br />Page 248 <br /> <br /> 3. The size of the effluent dose shall be determined by design of <br /> the soil treatment ~,n~t, but in no case shall the dosing <br /> chamber be sized to provide a dose of less th~n 75 gallons. <br /> <br />b. Do~_'ng Devices For Gravity Distribution. <br /> <br />A pump or siphon shall deliver the dose to the soil treatment <br />unit for gravity distribution over the soil treatment area. <br /> <br />For systems for dwellings, the dosing device shall discharge <br />at least 600 gallons per hour, but no more than 2,700 gallons <br />per hour. <br /> <br />For other establishments, the dosing device should discharge <br />at a rate at least 10% greater than the water supply flow rate, <br />but no faster than the rate at which effluent will flow out of <br />the distribution device. <br /> <br />If the dosing device is a siphon, a maintenance inspection <br />shall be made every six months and a report shall be filed <br />with the administrator. The siphon shall be maintained in <br />proper operating condition. <br /> <br />If the dosing device is a p, mp, it sha]] be cast iron or bronze <br />fitted and with St~r~less steel screws or constructed of other <br />sou_nd, durable and corrosion-resistant materials. <br /> <br />Where the soft treatment area is at a higher elevation than <br />the p,mp, sufficient dynsm~c head shall be pro¼ded for both <br />the elevation difference and friction loss. <br /> <br />Where the dosing device is a p,~r~p, an alarm device shall be <br />installed to warn of pump failure. For dwellings, there <br />should be reserve storage volume equal to one day's sewage <br />flow based on the amo~mts specified for n~mber of bedrooms <br />in §$.30.04 Subd. 3c. For other establishments, reserve <br />capacity shouJd be based on the nature, of the facility, but in <br />no case shall it be less than 25% of the daffy sewage flow. <br /> <br />D~s~ng Devices For Pressure Distributions. <br /> <br />The dosing device shall be a pump which is cast iron or <br />bronze fitted and with stainless steel screws or constructed of <br />sound, durable and corrosion-resistant materials. <br /> <br />The p~mp discharge capacity shall be at least 7-1/2 gallons <br />per m/nute for each 100 square feet of soil treatment area. <br /> <br />The pz=mp discharge head shalI be at least 5 feet ~eater than <br />the head required to overcome pipe friction losses and the <br />elevation difference between the pump and the distribution <br />de~-ice. <br /> <br /> I <br /> <br />I <br />I: <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br />Printed 12/28/90 <br /> <br />I <br />I <br /> <br /> <br />