COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

WASTE DISCHARGE REQUIREMEiv rS ORDER NO. 4 SPENKER RANCH,INC. JESSIE'S GROVE WINERY SAN JOAQUIN COUNTY 21. The RWD states that there is less nitrogen in the wastewater than the cropped land application area will utilize. This is based on a nitrogen demand of 250 lbs/acre-year for the 0.6 acre land application area, a conservative nitrogen effluent concentration(25 mg/L as an annual average), and annual of wastewater/stormwater generation of 205,000 gallons. The 0.6 acre land application area will take up approximately 150 pounds of nitrogen, while the total annual wastewater nitrogen application will contain approximately 40 pounds of nitrogen. 22. The application of the winery wastewater to 0.6 acres of land should not cause an increase in the TDS concentration in the underlying groundwater. TDS is composed of both Volatile Dissolved Solids (VDS) and Inorganic Dissolved Solids (IDS). The proportion of VDS to IDS in wastewater varies with the source, but 50-percent of the TDS in winery wastewater may be in the volatile form. These VDS are biologically treated by soil microorganisms in a well managed wastewater treatment and land application system, and should not enter the groundwater. Therefore, of the approximately 5,130 pounds of TDS in the wastewater, about 2,564 pounds are expected to be in the inorganic fraction, equating to a load of 3,663 lbs/acre for the 0.6 acre land application area. Plants can take up some dissolved solids species at a rate of 2,000 lbs/acre-year, so the proposed loading rate may be excessive and may degrade groundwater. The Discharger is therefore required to both install groundwater monitoring wells and to evaluate whether it should increase the size of its land application area. 23. Although the Discharger only proposed to apply treated process wastewater to 0.6 acres of land, this Order allows the Discharger to apply the treated wastewater to any cropped land within its 320 acre parcel, as long as it first submits an Operation and Management Plan for the additional cropped land. SOLID WASTE 24. Solid/semi-solid wastes such as pomace (skins, seeds, pulp, stems, etc. resulting from the grape crush), and wine settlement and filter cake media(bentonite and diatomaceous earth) are generated by the processing operations. Such solid/semi-solid wastes are segregated from the process wastewater stream for separate handling and disposal. The pomace is spread in the vineyards as compost and/or tilled into the vineyards as a soil amendment. The amount of diatomaceous earth generated is small and can be applied to the vineyards or land application area. 25. Screened solids will be used as animal feed or composted and reapplied to vineyards or other land application area. Sludge and scum removed from the industrial wastewater system septic tank will be discharged to a municipal wastewater treatment system or land applied. GROUNDWATER CONDITIONS 26. A soil boring was drilled on 7 November 2002. The boring was hand augured to a depth of 22 feet and a groundwater sample was collected. The analytical results are presented below: Constituent Units Concentration Sodium mg/L 19 Chloride mg/L 6.0 V:Su1RG 6.T'Sm loequwjwieGmv61—kG—WDRd.