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WASTE DISCHARGE REQUIREMENTS ORDER NO. • -9- R. LAWSON ENTERPRISES DBA WILDROSE VINEYARDS SAN JOAQUIN COUNTY 2. Any proposed change in sludge disposal from a previously approved practice (as described in these WDRs) shall be reported to this office at least 90 days in advance of the change. E. Groundwater Limitations: The discharge, in combination with other sources, shall not cause underlying groundwater to contain waste constituents in concentrations statistically greater than background water quality, except for coliform. For coliform, increases shall not cause the most probable number of total coliform organisms to exceed 2.2/100 ml over any 7-day period. F. Provisions: 1. By 16 June 2001 the Discharger shall comply with Discharge Specification B.5. In the meantime, the Discharger shall use best management practices to reduce the amount of salts entering the wastewater, and to maintain compliance with all other Prohibitions and Specifications contained within this Order. 2. Pursuant to Section 13267 of the California Water Code, the Discharger shall submit the following reports: a. By 15 September 2000, the Discharger shall install a meter to measure the flow of winery wastewater to the land application areas. b. By 6 October 2000, the Discharger shall submit a groundwater monitoring well installation workplan to monitor the effect of wastewater application on the underlying groundwater. The workplan shall be prepared by a California Registered Geologist or Engineer. The workplan shall be consistent with Attachment C, "Items to be Included in a Monitoring Well Installation Workplan and a Monitoring Well Installation Report of Results. " c. By 31 December 2000, the Discharger shall submit an Operation and Wastewater Management Plan (O&WM Plan)prepared by a California Registered Engineer which addresses operation of the wastewater treatment and disposal facility. At a minimum, the 0&WM Plan will describe operation of the wastewater facility to prevent disposal of water with excessive nitrogen,nitrate, or fixed dissolved solids concentrations. The report shall include winery expansion considerations, contingency plans for periods of extended rain, and the associated facility improvements needed to meet the requirements of this Order, including all Discharge Specifications and Groundwater Limitations. d. By 6 January 2001,the Discharger shall submit a groundwater well installation report. The report shall be prepared by a California Registered Geologist or Engineer and shall be consistent with Attachment C. 3. If winery discharges to the application areas are determined to have, or are likely to, impact groundwater quality based on the Operation and Wastewater Management Plan or subsequent monitoring reports, then a Wastewater Mitigation Plan shall be submitted within C:Nraject Fda\Si�w\Wild Rose\WRose dft WDRd..