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GEO-PHASE <br /> ENVIRONMENTAL <br /> 2nd REPORT ADDENDUM <br /> Soil Suitability and Nitrate Loading Study <br /> OAK FARM WINERY,23627 N. DEVRIES RD., LODI, CA <br /> (APN 003-140-03) <br /> (PA-1200192) <br /> GPE Project No.670.1 C <br /> November 20,2013 <br /> 3.3 Existing and Proposed Septic System Usage <br /> The following table summarizes estimates of maximum daily septic sewage flow with the <br /> revision to existing residential septic system: <br /> System Personnel Number Flow Rate Total Daily Flow <br /> Existing Res. Residents 6 50 GPD 300 GPD <br /> Production/Tasting Full Time Employees 4 15 GPD per Person 60 GPD <br /> (proposed) Part Time Employees* 5 8 GPD per Person 40 GPD <br /> Tasting Room Visitors•• 100 4 GPD per Person 400 GPD <br /> MAX TANK USE 500 GPD <br /> Existing Events Full Time Em I s 4 IS GPD r Person 60 GPD <br /> Part Time Em to es• 4 8 GPD r Vers <br /> 32GPD <br /> Guests*** 150 8 GPD r Person 1 200 GPD <br /> MAX TANK USE 1,2 <br /> 92 GPD <br /> • Assumes part timers work approx.half time. <br /> •' Assumes 2 restroom visits each day at 2 gals.per use for a maximum of 100 customers. <br /> •'• Assumes 4 restroom visits each day per person at 2 gals.per use. <br /> # Req.Tank Capacity for New 5 B/R residence is 2000 Gals.but there are only 3 residents. <br /> Using the 500 GPD number as the average daily flow rate for the proposed new system, the standard design <br /> criteria established by the EHD suggests the septic tank capacity should be at least 1,200 gallons. <br /> 7.1 Input Data to the Model <br /> Flow Rates <br /> The average daily flow rates of each septic system on the site were estimated. The revised <br /> estimates are summarized in following table: <br /> 2937 Veneman Ave.,#6240 Geo-Phase Environmental Inc. Phone: (209)569-0293 <br /> Modesto,CA 95356 Fax: (209)569-0295 <br />