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Soil Suitability/Nitrate Loading Study Addendum Letter Nostra Vita Winery Lodi, California 1rerracon May 20, 2019 revised June 10, 2019 Terracon Project No. NA197023 Terracon reviewed the EHD online permits for the site address of 1150 W. Turner Road. The following permits were available on the EHD website for the site address. Table 2. Summary of On-Site Septic Permits. Leach Tank Size Leach Line Line Seepage Pits, Address Permit# Type Sumps,Filter (Gallons) Quantity Length Beds,Other (Feet) SR0050124 Destruction --- --- 1150 W.Turner Road SR0055802 New Install 1,600 4 84 --- Based on a review of the permit history, the site is equipped with a 1,600-gallon septic tank with four 84 foot long leach lines. A septic system presumably associated with the former residence was destroyed in 2007. There were no repair permits found for the address. Copies of the permit history are included in the Attachments. Based on interviews with Ms. Bloudoff-Indelicato, in general, the existing wine tasting room..-_- operates year-round, Monday, Thursday, Friday, Saturday, and Sunday from 11 am to 6 pm with a single shift work day and includes up to 5 employees, up to 25 daily visitors, and 30 single day events each year and up to 120 people in attendance per event. The proposed 4,000 SF winery production building will operate year round, Monday through Friday, between 8 am and 5pm with up to 3 employees per day. Ms. Bloudoff-Indelicato indicated up to 10 employees are anticipated to operate the facility;therefore, Terracon increased the number of employees utilizing the 4,000 SF winery production building from 3 employees to 5 employees. In accordance with the San Joaquin County Onsite Wastewater Treatment System Standards (OWTS)dated January 2017, Table 6.6-Water Use Computation table,the following average daily flow rates have been selected to calculate the wastewater flows for the facility: e) Bars or cocktail lounges 20 gallons per person (similar to a wine tasting customer) m) Day schools with cafeterias, gyms & showers 25 gallons per person (similar to a warehouse employee utilizing showers) o) Day workers at schools or offices 30 gallons per shift (similar to an office employee) To estimate the wastewater flow for the facility, Terracon considered the standard and peak operational hours, shifts, number days of operation per year, number of employees, number of visitors, and special events. The maximum (max)daily flow rate and average daily flow rate were calculated for each building. Expected Maximum Daily Flow Rates (# People per day x# Effluent gpd) The max daily flow rate for the existing facility is 650 gpd (5 employees x 30 gpd + 25 visitors x 20 gpd). The proposed wine production building is anticipated to add an additional 125 gpd (5 employees x 25 gallons per day). The special events are anticipated to add 2,400 gpd (120 people Responsive ■ Resourceful ■ Reliable 4