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i <br /> i 1.1 Necessary Capacity <br /> In preliminary discussions regarding conceptual design of KMC wastewater facilities, SJCEHD <br /> staff provided input regarding design flows. SJCEHD recommended using water consumption <br /> data for existing truck stop and restaurant facilities within San Joaquin County as a basis for <br /> estimating KMC wastewater flows. To facilitate the flow estimates, County staff provided <br /> potable water use data for the Flag City commercial development near Lodi. The Flag City data <br /> are presented in Appendix B. <br /> Wastewater generation rates and flow calculations for Phase 1 and Phase 2 are presented in <br /> Appendix C. Calculations were based on Flag City data where practicable, and other references <br /> (including the USEPA Onsite Wastewater Treatment Systems Manual, February 2002 [1]) were <br /> used as needed. Summaries of the estimated wastewater flows for Phase 1 and Phase 2 are <br /> presented in Table 1 and Table 2, respectively. The total estimated wastewater flow from Phase 1 <br /> and Phase 2 developments combined is approximately 10,880 gpd. <br /> { TABLE 1 <br /> KMC—SUMMARY OF ESTIMATED WASTEWATER FLOWS <br /> PHASE 1 <br /> Estimated <br /> Development Component Wastewater <br /> Flow,gpd <br /> Automobile Fueling Station 540 <br /> kTruck Fueling Station 1,000 <br /> Truck Lube Facility 160 i <br /> 1 Restaurant No, 1 1,450 <br /> Total 3,150 <br /> TABLE 2 a <br /> KMC—SUMMARY OF ESTIMATED WASTEWATER FLOWS <br /> ` PHASE 2 <br /> Estimated <br /> F Development Component Wastewater <br /> i <br /> Flow,gpd s <br /> j Restaurant No.2 2,880 <br /> Hotel 4,850 <br /> Total 7,730 <br /> { 1.2 Parallel Treatment Units <br /> Raw wastewater will be collected and directed into treatment units. Elevated groundwater nitrate <br /> concentrations are a concern locally, and a nitrate loading study for the proposed KMC site was <br /> conducted in 2006 [2]. To address this concern, design criteria for the wastewater treatment units <br /> will include a maximum effluent nitrate concentration of 10 mg/L as nitrogen. Pre-packaged, <br /> 1 <br /> I <br /> KMC—Wastewater Pre-Application Information 2 MT13015600 <br /> September 2007 nimtb0156001reportslwastewater pre applfinal 091907.doc <br /> l <br />