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Check sand filter overall 30-80 psi <br /> pressure <br /> Check sand filter 5-17 psi <br /> differential pressure <br /> Check flow meter on the Approx. 500 gpm max <br /> sand filter <br /> Check influent water pH between 6.5-8.5 pH Turbidity <br /> quality <br /> and Turbidity <br /> Check effluent water pH between (.5 from background) pH Turbidity <br /> quality <br /> Turbidity < 5 NTU from <br /> background, NTE 10 <br /> Record treatment system Record the total volume of Total Vol. <br /> process volume processed water on the discharge <br /> flow meter and record the value. <br /> City of Everett <br /> EVERETT Reviewed for Permit 10/20/2021 <br /> 17 <br />