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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 I <br /> and Phase 2 developments combined is approximately 10,880 gpd. <br /> TABLE I <br /> KMC—SUMMARY OF ESTIMATED WASTEWATER FLOWS <br /> PHASE I <br /> Estimated <br /> ^ Development Component Wastewater <br /> Flow,gpd <br /> Automobile Fueling.Station 540 <br /> Truck Fueling Station 1,000 <br /> Truck Lube Facility 160 <br /> Restaurant No. 1 1,450 <br /> Total 3,150 <br /> TABLE2 <br /> KMC—SUMMARY OF ESTIMATED WASTEWATER FLOWS <br /> PHASE 2 <br /> Estimated <br /> Development Component Wastewater <br /> Flow,gpd <br /> 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 /> .- KMC—Wastewater Pre-Application Information 2 MTBO15600 <br /> r— September 2007 n:\mtb015600\rcportskvastewater pre appWinal 091907.doc <br />