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u <br /> Additional Information Requirements 23 August 2005 <br /> Munn and Perkins, Escalon, San Joaquin County <br /> 10. Provide a process flow diagram, and a scaled map showing the facility and all active, abandoned, or <br /> future wastewater ponds. Will the.sand/gravel washing area(s) and ponds remain in the same location <br /> or will they be moved? <br /> 11. Provide the estimated daily peak and daily average volume of wastewater discharged from the <br /> operations. Provide a list showing each wastestream generated from mining or processing ore and <br /> the estimated average daily flow for each wastestream. Describe any variation in discharge rates <br /> from the dry to wet season. <br /> 12. Provide a water balance that evaluates the wastewater pond(s) ability to provide sufficient capacity <br /> on a month-by-month basis. Include monthly evaporation, precipitation,stormwater entering ponds <br /> (if applicable), and.process return rates as well as monthly discharge volumes. Rainfall shall be <br /> based on the 100-year return period total annual precipitation, distributed monthly in accordance <br /> with mean monthly precipitation patterns. Contact the Regional Board staff member for clarification <br /> if needed. <br /> 13. For each wastewater/stormwater pond, what is the approximate storage capacity allowing for two <br /> feet of freeboard and deducting the volume of the sludge presently retained within the pond? What <br /> is the estimated sedimentation rate for each pond? <br /> 14. Provide a chemical characterization of each process wastewater stream, and the wastewater <br /> discharged to the wastewater ponds. The samples shall be tested for total suspended solids, total <br /> dissolved solids, pH, standard minerals, and Title 22 metals. Samples shall be filtered prior to <br /> digestion and analysis: The sample data must be of sufficient quality.for,staff to determine.if the <br /> waste is a designated waste as defined in CWC Section 13173. <br /> 15. Describe storage areas and-approximate.storage amounts of petroleum, hydraulic oils, and other <br /> chemicals that are stored or used on-site. <br /> 16. Describe the type and volume of any chemical, such as polymers, added directly to either the <br /> wastewater or wastewater ponds. <br /> WASta"rien'nSan Jo quinMunn and Pcii—Wetch P Aug O5.dv <br />