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SUMMIT ENGINEERING, INC. Consulting Civil Engineers July 23, 2001 Project No. 2001015 Page B.6 a Surface Waters All wastewater treatment facilities are designed with sufficient drainage facilities to divert local runoff. 1. Irrigation/disposal operations will be routinely monitored to ensure against surface runoff. Irrigation/disposal will be suspended for approximately 48 hours prior to, during and following any forecasted storms. Irrigation/disposal will be suspended as long as saturated soil conditions persist. Protection Exposed wastewater treatment facilities will continue to be posted with appropriate warning signs. The aerated lagoons will be fenced if necessary to restrict public access. ALTERNATIVE COURSES OF ACTION Although no operational difficulties are foreseen, the following additional courses of action would be available if necessary: 1. Ability to add carbon dioxide to reduce pH at the pretreatment site 2. Ability to add hydrogen peroxide to the ponds as a supplemental oxygen source or for odor control 3. Provision of higher aeration capacity in the ponds and/or aeration in the irrigation reservoir 4. Additional stages of treatment to increase effluent quality t 5. Increased use of irrigation/disposal area to increase discharge capacity The facultative aerated lagoons have been designed for retention of wastewater and rainwater through the majority of the rainy season with minimal discharges to irrigation/disposal fields (based on a 100 year '4 seasonable rainfall). Should there be a winter with more rainfall than the design condition, several operational procedures are available to compensate: I 1. Additional water conservation at winery 2. Light irrigation during periods between storms -- not exceeding the assimilative capacity of the soil 3. Increased irrigation during the months of planned irrigation. 4. Pumping and truck transfer of treated and diluted wastewater to a sewage treatment plant or land disposal site