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1. Introduction <br /> Luhdorff and Scalmanini, Consulting Engineers(LSCE)has prepared this 2010 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 /> under Quarry Excavation No. QX-91-5(Teichert's permit)for the Lone Tree 1 through VII properties/ <br /> phases'. Lone Tree It mining commenced in 1998. Granite's plant is located south of the Lone Tree 11 <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 2010 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 /> ' These properties are cumulatively known as Vemalis Central. <br /> ©CON5ULTI ] SNOINENRS <br /> CONSULTING ENGINEERS 1 <br />