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There are a total of 36 toilets and 13 urinals listed on the fixture count document: <br /> Wastewater volume and usage calculations: <br /> Volume: <br /> 36 toilets x 2 flushes/toilet/hr x 20 hrs/work day x 2 gals/flush (incl.hand washing)=2,880 gpd <br /> 13 urinals x 4 flushes/urinal/hr x 20 hrs/work day x 1.5 gals/flush(incl.hand washing)= 1,560 gpd <br /> 2,880+ 1,560=4,440 gpd=Average Daily Flow(ADF) <br /> 4,440 gpd x 6 work days/wk x 50 work wks/yr= 1,332,000 gals/yr <br /> 1,332,000 gals/yr_365 d/yr=3,649 gals effluent generated on average, every day of the year. <br /> Usage: <br /> 4,440 gpd_500 employees=8.9 gals/emp/day <br /> Wastewater Characteristics <br /> The domestic wastewater generated from the facility will be composed of blackwater from toilets <br /> and greywater from hand washing. There will be no high organic loading from wine waste, break <br /> room use, etc. Additional wastewater constituents may consist of other liquids to the system, such <br /> as coffee,juices, low-strength cleaning liquids, etc. any food waste products must be handled as <br /> solid wastes. <br /> No wastewater generated from the on-site winery laboratory is introduced into the OWTS. Any <br /> laboratory waste is classified as winery waste and managed under the aforementioned Waste <br /> Discharge Requirements (WDRs). It is imperative that low strength and low volumes of cleaners <br /> are used in the restrooms since they can disrupt septic tank biology. <br /> To utilize accurate nitrogen concentrations in the nitrate loading'calculations, a septic tank effluent <br /> sample was retrieved from the second compartment of the 2,000 gallon tank which serves the <br /> Administration Building. The test results are summarized below in Table 5 and found in Appendix F. <br /> TABLE 5 <br /> ADMINISTRATION BUILDING SEPTIC TANK EFFLUENT SAMPLING' <br /> TEST RESULTS <br /> SAMPLE BIOCHEMICAL TOTAL TOTAL AMMONIA ORGANIC TOTAL pH .t <br /> ID OXYGEN SUSPENDED KJELDAHL NITROGEN NITROGEN ALKALINITY <br /> DEMAND SOLIDS NITROGEN NH, (Calc.) <br /> (BOD,) (TSS) (TKN) <br /> Admin 250 mg/I. 100 mg/1' 176 mg/I, 119 mg/L 57 mg/l. 522 mg/L 7.0 <br /> S.T. <br /> The TKN value will be used in the nitrate loading calculations below. Typically, organic nitrogen <br /> concentrations in septic tank effluent are 25%to 33%of the Total Kjeldahl Nitrogen(TKN) <br /> concentrations,which was observed from the test results. <br /> Page -7- <br /> Chesney Consulting <br />