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LOGE 1013: PONDL Septic Capacity Page 2 <br /> August 5, 2010 <br /> Two employees per day <br /> (Dayworkers = 30 gallons per day per person) <br /> Up to 20 customers per day <br /> (Bar&Cocktail Lounges=20 gallons per day per person) <br /> ADF =(2 *30) +(20 "'20) <br /> ADF= 460 gallons ! ' <br /> BTC= 1,200 <br /> CTC = BTC + ADF <br /> CTC = 460 + 1,200 <br /> v; T CTC=1,660 gallons (minimum tank size needed) <br /> The use levels indicated above are probably not the average use but represent the peak use at <br /> the facility. During the off-season months, use levels at the winery will most likely be much <br /> lower. <br /> Since the CTC falls between 1,600 gallons and 2,000 gallons, which are the standard <br /> production tanks sizes produced in the area,we would recommend using the 2,000 gallon' <br /> tank."This size would accommodate the required CTC and allow an extra 340 gallons of <br /> Volume (about 20 percent) over what is required. The extra volume of the tank will increase the <br /> septic tank retention time, which is often considered the most important single step to improve <br /> overall water quality in septic tanks. <br /> `Based on the results of our report with the recommended tank capacity discussed above, we <br /> ado not believe the proposed winery facility will cause a buildup of nitrates in the groundwater <br /> above 10 mg/L-N.f <br /> Please feel free to contact me with any additional t9 —but this project. <br /> Sincerely, JPO 'i' WF��, N <br /> Li;Z7GEOLOGIST <br /> entaf, Inc. W Q�' lyo. 2151 4 <br /> ENGMEERNG <br /> =Q <br /> David J. Welch, CEG, CHG, PGP, Owner TEOFCA�-,���� <br /> CC: Patrick O'Neill,, 1330 Hester Ave., San Jose, CA 95126 <br /> Mike Smith, Mike Smith Engineering, 4 N. Main St., Lodi, CA 95240 <br /> a <br />