Wines & Vines

January 2017 Unified Symposium Issue

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148 WINES&VINES January 2017 GRAPEGROWING irrigation of landscape areas annually for flows greater than 1 million gallons per day or every five years for flows less than 1 million gallons per day; • Monitoring of total coliform bacteria and turbidity if disinfection is performed, customized to site-specific conditions; • Quarterly monitoring of recycled water storage ponds for freeboard, odors and berm condition, and • Monthly monitoring of recycled water discharge areas for flow and, on a quar- terly basis, for soil saturation/ponding, nuisance odors/vectors, off-site dis- charge and notifications signs. The general order also describes the state's monitoring and reporting program, including requirements for report submittal through the State Water Board's California Integrated Water Quality System program and Geo- Tracker database. While producers and distributors file the notice of intent directly with the SWRCB, gener- ally users apply to their regional water boards for an individual or general discharge permit. Region 1 (California's North Coast) adopted general waste discharge requirements for eligible wine, beverage and food-processing facilities. Under these requirements, Region 1 wineries can apply to be a producer and/or user of recycled water for use as irrigation, frost protection, landscaping or as a soil amendment by submit- ting a technical information form to the regional board. If the board determines coverage is ap- propriate, it issues a notice of coverage letter and the general permit becomes effective for that user. The Region 1 order requires that: • Process wastewater be captured and treated separately from domestic wastewater; • Process wastewater ponds be operated and maintained to prevent inundation or washout due to 100-year floods; • Treatment and disposal systems be de- signed for the maximum daily flow of wastewater and organic loading gener- ated, including flows from precipitation; • Land application areas that receive treated process wastewater be managed to prevent ponding, runoff and erosion, and so recycled water cannot reach any surface waters; • The applicable organic loading rate for the discharged area is not exceeded; • A statistically significant increase of mineral constituent concentrations in underlying groundwater is not caused; • Recycled water not be applied to land within 24 hours of a forecasted rain event, during rainfall, 24 hours after a rainfall event or when soils are saturated; • Recycled water not be applied in a man- ner so as not to exceed the vegetative nutrient demand; • Recycled water be managed to prevent, ponding, runoff and erosion; • All piping, valves and/or outlets associ- ated with the recycled water discharge be property labeled or marked in accor- dance with all applicable regulations, and • Other discharge and design specifications. Region 2 (San Francisco Bay) established a slightly different program, the General Water Reuse Requirements for Municipal Wastewater and Water Agencies, that works in tandem with The pipes' purple color identifies them as carrying treated wastewater rather than drinking water.

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