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' • • LFR Levine-Fricke ' There are two industrial groundwater supply wells within a 1-mile radius of the Site. One is located at the adjacent Teichert facility; the other is located at the adjacent RMC Lonestar facility. The construction details are not available for these two wells. The nearest residence is located approximately 0.5 mile east of the Site. t The nearest surface-water features to the project site are Corral Hollow Creek to the north, an intermittent natural drainage course; the Delta-Mendota Canal, an irrigation canal; and the California Aqueduct. The topographic nature of the Site precludes it as a potential source of runoff to any of these water features. Because the Site is a former gravel mine, it is essentially a closed basin with no outfall. All rainwater that falls onto the Site infiltrates into the soil substrate and serves as local groundwater recharge. ' "The Water Quality Control Plan, Sacramento River and San Joaquin River Basins" ("Basin Plan"; Regional Water Quality Control Board [RWQCB] 1998) designates ' beneficial uses, establishes water-quality objectives, and contains implementation plans and policies for all waters of the Basin. The designated beneficial uses of the groundwater, as specified in the Basin Plan, are domestic and municipal, agricultural, ' and industrial supply. As stated previously, there is no surface-water flow into or out of the project site because it is located in an excavated pit. ' 1.4 Objective Groundwater elevation data previously collected at the Site indicate that groundwater ' flow in the upper water-bearing unit is toward the northwest (Figure 3). Based on this flow direction, and the orientation of existing five monitoring wells at the Site, an additional groundwater well is needed to provide groundwater-quality data downgradient from the northern extent of Burn Pile Areas 2 and 3. The objective of this work plan is to install a groundwater monitoring well to address this data gap. ' 2.0 SCOPE OF WORK ' The scope of work for this work plan consists of drilling and installing one groundwater monitoring well, developing and sampling the newly installed well, and ' submitting the groundwater samples to a state-certified laboratory for analysis. ' 3.0 WELL INSTALLATION 3.1 Permit ' Before well installation activities begin, a permit to install the groundwater monitoring well will be obtained from the San Joaquin County Environmental Health Department ' (SJCEHD). ' wp-MW-06 Install-Sep05-final-09025v2Am:LFR Page 3