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i <br /> Fl. Introduction <br /> Luhdorff and Scalmanini, Consulting Engineers(LSCE)has prepared this 2012 Groundwater Monitoring <br /> Report on behalf of Teichert Aggregates(Teichert)and Granite Construction Company(Granite)for their <br /> quarry excavation operations in the Vernalis area of southern San Joaquin County, California(Figure 1). <br /> Teichert's plant is located at 36314 South Bird Road, Tracy,CA 95304 (Figure 2). The plant operates <br /> r under Quarry Excavation No. QX-91-5 (Teichert's permit)for the Lone Tree I through VII properties/ <br /> phases. Lone Tree II mining commenced in 1998. Granite's plant is located south of the Lone Tree II <br /> property at 37400 South Bird Road,Tracy,CA 95304. Granite's plant operates under its Revised <br /> Conditional Use Permit for Quarry Excavation and Excavation Plan No. QX-94-1 (Granite's permit)and <br /> its approved Groundwater Monitoring Plan(LSCE,2009). Phase I mining commenced in late 2007. <br /> All phases of the excavation are permitted for dry pit operations. The maximum mining depth at the <br /> facilities shall not exceed 150 feet below ground surface(bgs). Actual allowed mining depths may be <br /> reduced by San Joaquin County based on groundwater level elevation data developed by the monitoring <br /> program. <br /> Between 1995 and 2008,Teichert submitted annual groundwater monitoring reports for compliance <br /> purposes for its Lone Tree quarry excavation operations. This 2012 Groundwater Monitoring Report was <br /> prepared to satisfy both Teichert's and Granite's permit requirements related to groundwater monitoring <br /> and reporting activities. <br /> V <br /> These properties are cumulatively known as Vernalis Central. <br /> ©LLF[x] S SCALMI INI <br /> CONSULTING ENGINEERS <br />