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1 • © <br /> Appendix 2A: Example Design for a Campground (Application Type 2) <br /> Standard AdvanTex Treatment for Removal of Organics With cB0D5 and TSS Discharge Limits <br /> Example: Campground with 5 RV spaces and dump station,40 camping spaces,a shower house with restroom facility,a separate restroom only <br /> building,and living quarters for a camp host.System is to be discharged to a pressurized drainfield and permit requirements include organic <br /> (cBOD5 and TSS)discharge limits. <br /> Establishing a Design Basis <br /> Flows <br /> • List Contributing Sources,Anticipated Flows and Corresponding Waste Strengths <br /> • Waste strengths are provided after primary tankage and are listed as primary-treated effluent(PTE) <br /> Table 2A-1: Flows <br /> Source Design Maximum Day Flow' (gpd) BODS(mg/L) TSS(mg/L) TKN(mg/L) <br /> RV Dump Station2 250 1,800 800 160 <br /> Shower House w/Restrooms3 4,500 225 75 80 <br /> Restrooms4 1,800 300 100 120 <br /> Camp Host Living Quarters 150 150 60 60 <br /> Total Flow(QM) 6,700 3025 1085 935 <br /> 'For Average Day Design Flow(QA),assume 50%of Maximum Day Design Flow(QM);QA=3350 gpd <br /> 2 Dump station flow calculated using 50 gallons/RV per day <br /> 3 Typically equals Number of Sites x Usage per Site or Number of Visitors x Usage per Visitor(45 sites x 4 users per site x 25 gpcd) <br /> °Typically equals Number of Sites x Usage/Site or Number of Visitors x Usage per Visitor(45 sites x 4 users per site x 10 gpcd) <br /> 5 Total Waste Strength is determined by mass balance calculation using the volume and strength of each contributing source;see Equation B2 in Appendix B and example below <br /> Determine the mass balance for the blended concentration of BOD51B using Equation 132 from Appendix B: <br /> (250 gal*1800 mg/L) + (4500 gal*225 mg/L) + (1800 gal*300 mg/L) + (150 gal*150 mg/L) <br /> 6700 gal <br /> Using the calculations,the blended concentration of BOD56=302 mg/L(approximately 300 mg/L). <br /> Discharge Type <br /> Pressurized drainfield. <br /> Influent(Primary Treated Effluent) and Permit Parameters <br /> Table 2A-2: Influent and Permit Parameters <br /> 11301135(mg/L) TSS(mg/L) <br /> Primary Treated Effluent(Ave/Max) 302 108 <br /> Discharge Permit Requirement(30-day Average) 20 20 <br /> Other Design Considerations <br /> Seasonal use <br /> Some camps are only used seasonally and flows may vary wildly during this period. For those with highly variable flow fluctuations with lim- <br /> ited full occupancy,flow equalization and a corresponding downsizing of the treatment facility may be in order. <br /> Temperature effects <br /> Seasonally low temperatures may impact performance of a treatment system. For camps that are to be used during the winter <br /> months,there may be a need to address waste stream temperature effects.AX-Max systems are constructed within insulated vessels <br /> and are preferred for cold environments,though AX100 with external insulation added in the field can also be utilized. <br /> Orenco Systems°•800-348-9843•+1 541-459-4449•www.orenco.com NDA-ATX-1 <br /> Rev.8,©10/20 <br /> Page 31 of 38 <br />