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Introduction <br /> .General Information <br /> Located in Lodi California, The Crusader North Valley School consists of a <br /> self-contained day school. Treatment . and disposal of wastewater is <br /> accomplished by an onsite treatment facility. Treatment is comprised of a <br /> single Raptor package treatment plant. Treated wastewater is disposed of in <br /> a Drywell percolation field. Final disposal into the ground is accepted <br /> practice by the local regulatory agencies. Crusader North Valley School staff <br /> manages the day-to-day operation & maintenance of the facility, while 7-H <br /> Technical Services Group can perform wastewater treatment management by <br /> contractual agreement with Crusader Management. <br /> Definition of Flow . <br /> Wastewater flow is described as any water that has left the business or <br /> residence via a sewer line connection. Based-on standard flow rates, the <br /> calculated flow for the Crusader school is 6,000 gpd. <br /> Facility Design <br /> The North Valley School wastewater treatment plant (WWTP) is a modified <br /> trickling filter plant. This plant has a rated capacity of 6,000 gpd. Stable <br /> plant operations will allow the plant to consistently meet water quality <br /> permit requirements for effluent biochemical oxygen demand (BOD) and <br /> total suspended solids (TSS). North Valley School WWTP.has design criteria <br /> specific to the.operation of this facility with the following parameters: <br /> Treatment Plant Parameters <br /> Capacity: <br /> Raptor 6,000 gpd total <br /> BioFilter Media 512 cubic feet <br /> Loading: <br /> BOD mg/l 300 mg/1 <br /> BOD Loading Lbs./day 15 lbs./day <br /> TSS mg/1 300 mg/1 <br /> TSS Loading Lbs/day 151bs./day <br /> Lbs. BOD/1000cuft 30 <br /> Removal efficiency 85% <br /> Raptor: <br /> No. of Units 1 Unit <br /> 7H Technical Services Group Operation &Maintenance Manual <br /> Introduction Page 4 of 26 <br /> 991215 <br />