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ADDITIONAL INFORMATION REQUIRED <br /> TEICHERT AGGREGATES' TRACY ROCK FACILITY <br /> TRACY, SAN JOAQUIN COUNTY <br /> Please provide the following information: <br /> 1. Describe the area to be excavated and the projected schedule for each phase. Include estimates of <br /> the amount of sand and gravel that will be produced each year and the volume of washwater that <br /> will be produced. <br /> 2. Describe the products that are manufactured or are planned to be manufactured on site (e.g. <br /> asphaltic concrete, concrete, aggregate, etc.). <br /> 3. Provide a process flow diagram, processing plant site plan, and a scaled map showing the facility. <br /> 4. Describe the generation, transportation, and disposal of all wastewater(wastewater includes <br /> washwater, stormwater, and other sources of wastewater such as vehicle washwater). <br /> 5. Provide a copy of the facility's Surface Mining and Reclamation Act plan. <br /> 6. Provide a brief description of the geology and hydrogeology of the area. Has the area been <br /> previously mined? Are any areas of the site located within the 100 year flood zone? <br /> 7. Because mercury has been detected in wastewater from many sand and gravel operations in <br /> California, all aggregate facilities are required to characterize their wastewater. Teichert <br /> Aggregates is directed to collect samples of the washwater for chemical analysis. Samples shall <br /> be collected from all wastewater/stormwaterponds when wastewater is being discharged to the <br /> pond. The detection limit for the analysis shall be at least 1.0 nanogram/liter. The samples shall <br /> not be filtered prior to digestion and analysis. <br /> 8. Describe storage areas and approximate storage amounts of petroleum,hydraulic oils, flocculants, <br /> and other chemicals that are stored or used on site. <br /> 9. Describe the disposal of the domestic wastewater generated on site. <br /> 10. Do active or abandoned industrial, agricultural, domestic, or groundwater wells exist at the <br /> facility? If yes, provide a map showing their location(s). <br /> 11. Projected monthly water balance demonstrating adequate containment capacity for the 100-year <br /> return period total annual precipitation, including consideration of at least: <br /> a. Local evaporation data. <br /> b. Local precipitation data. <br /> c. Projected future wastewater loading rates. <br /> d. Projected long-term percolation rates (including consideration of percolation from lined ponds <br /> and the effects of solids plugging on all ponds). <br /> 12. Provide CEQA documentation for the wastewater treatment and disposal system, providing <br /> identification and analysis of potential impacts associated with the facility, and a description of <br /> required mitigation measures. Also include documentation that demonstrates legal resolution of <br /> any CEQA-related issues. <br /> C w4wjdrs it Ter -Truy.I kkwm IIZ.. <br />