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1 S ' _ for the monitoring program included regional and site-specific hydrogeologic conditions; potential contaminant sources and transport mechanisms; site-specific methods proposed for minimizing possible on-site chemical migration to the ground Fiw ater beneath the project sites;. and existing ground-water monitoring requirements for various land use activities and the relative risk posed by the proposed mining. f - ter quality monitoring program recommended initial The proposed ground wa, q y g p g baseline monitoring to characterize the pre-mining ground-water conditions, detection monitoring to assess whether engineering controls are protective of ground-water quality, and verification monitoring to assess whether ground-water contamination (if detected) is associated with the proposed mining, reclamation, kand/or post-reclamation activities. Kaweah River Rock Expansion near Woodlake,Tulare County F1, LSCS developed a program to investigate the anticipated ground-water impacts under various project scenarios for a proposed three phase 815 acre aggregate mine in Tulare County. LSCE constructed five multiple completion monitoring wells, t=} :conducted water level monitoring and water quality analysis, conducted and evaluated aquifer tests (including interference testing), and constructed a numerical ground-water model to address short-term (during excavation) and long-term (after reclamation) efforts of the project. The work included evaluation of mitigation measures and post mining reclamation plans to minimize potential ground-water impacts. The scope of work included updating the EIR and communication. with various government and citizen groups with respect to results of the study. Ground-Water Impacts of Proposed Wet-Pit Terrace Mining near Russian River; Syar Industries, Inc. and Kaiser Sand and Gravel LSCE conducted an investigation of ground-water conditions and planned aggregate � mining along the middle reach of the Russian River in Sonoma County. A numerical ground-water flow model was developed for the northern half of the valley to evaluate potential ground-water impacts resulting from proposed { expansion of wet-pit mining on the west side of the Russian River as required by the Sonoma County Aggregate Resources Management (ARM) Plan. The scope and areal extent of the impact evaluation have been expanded to include proposed I mining on the east side of the River and additional mining on the west side of the River. The model area was enlarged to include the entire middle reach, and the model was used to simulate mining impacts as well as the impacts of increased municipal pumping by the Town of Windsor (from a multiple well field immediately adjacent to the River) and increased pumping from new Ranney collectors proposed by the Sonoma County Water Agency (installed immediately adjacent to the River), i. both of which are.contiguous to expanded mining.