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4W Wastewater Treatment System FALL CREEK - Engineering Report ENGINEERING,INC. 1. INTRODUCTION Jessie's Grove Winery (Speaker Ranch, Inc.), located at 1973 W. Turner Rd, in Lodi, California (APN #013-050-17), is a wine producing facility and vineyard. The family has owned the property since 1872. The Winery is situated on a 320-acre parcel, which has vineyards, pasture, an oak grove, and a residence in addition to the winery. The facility includes an office, several outbuildings (sheds and garages), a tasting room, and outdoor wine storage. %W Under the current plan the winery anticipates crushing approximately 390 tons of grapes annually producing approximately 66,300 gallons of wine, which will be divided into bulk wine and approximately 5000 cases of bottled wine. The Winery anticipates no production increase �► above this level in the next five years. However, in the subsequent 5 years production could increase by as much as 538 tons, for a total annual crush of 928 tons (158,000 gallons). `r Domestic wastewater at the winery is collected and disposed of in three conventional septic systems. Winery process wastewater and stormwater runoff is collected in a combined gravity �. flow sewer system, which conveys wastewater/storm water to a pump basin. After entering the pump basin the water was pumped to small holding tanks where it was stored before being \, applied to the vineyards. During the winter months, stormwater was directed toward the onsite stormwater detention area. The current policy of the Regional Water Quality Control Board (RWQCB) requires new wineries to treat their wastewater before disposal. Therefore, the Winery has chosen to install a new wastewater treatment and disposal system. s Fall Creek Engineering, Inc, (FCE)has been retained by Jessie's Grove Winery to design an onsite wastewater treatment and land disposal system. Plans have been designed to meet the RWQCB's requirements for the treatment and disposal of winery process wastewater and stormwater. FCE proposed the following components as part of this plan: `.. %„ (1) A new pump basin and pump system; _ (2) A hyperbolic screen; (3) A 5,000 gallon septic tank; (4) A 0.22-acre sub-surface flow vegetated wetland; and (5) An effluent pump system and 0.6-acre irrigation area. Process wastewater will flow via gravity from existing and new floor drains at the winery to a new pump basin. Water will be pumped from the basin over a new hyperbolic screen. The screen will provide screening to remove coarse solids from the wastewater, thereby eliminating some of the organic matter entering the treatment system. Solids are expected to consist primarily of grape skins, stems, and grit. From the screen, water will flow via gravity to a new .. 5,000-gallon septic tank. The septic tank will settle the solids that were not screened and provide anaerobic treatment. Settling and anaerobic digestion will further reduce the amount of organic matter in the wastewater. From the septic tank, wastewater will flow via gravity to a 0.22-acre subsurface flow treatment wetland. The detention time in the wetland will be at least of 10 days. The wastewater will ` JESSIE's GROVE WINERY MAY 2002 I