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_I LFR Levine-Fricke The Site is a closed basin with no paths for surface water outfall and there are no significant surface water sources (e.g., streams, ponds) located at the Site. The Banta Carbona Irrigation District Canal bounds the gravel pit to the east and Corral Hollow l Creek, an intermittent stream, is located 500 feet to the south. Other surface water in the vicinity of the Site consists of Delta Mendota Canal (located approximately 0.5 mile to the southwest) and California Aqueduct (located 1 mile to the southwest). ) 3.0 WELL INSTALLATION AND GROUNDWATER MONITORING 3.1 Scope of Work The scope of work conducted at the Site during the period from March through May 2003 included the following tasks: • drilled and installed one groundwater monitoring well (MW-5) • drilled and installed one production well (PW-1) • developed and sampled the newly installed wells '.a measured depth-to-groundwater and collected groundwater samples from the five site monitoring wells (MW-1 through MW-5) • conducted laboratory analysis of collected groundwater samples • evaluated the monitoring and sampling results 3.2 Monitoring Well Installation One groundwater monitoring well (MW-5) was installed on March 23, 2003 to provide groundwater-quality data downgradient from the Site. Soil boring logs and well construction information for the monitoring well is included in Appendix A. The borehole for the well was advanced to a depth of approximately 121 feet bgs using a hollow-stem auger rig. After the borehole was advanced to the desired total depth, 1 the well was constructed using 2-inch-diameter, schedule 40 PVC casing with 0.010- inch factory-cut slots. The screened interval of the well extends from 101 to 121 feet bgs with the remainder of the well constructed with 2-inch-diameter PVC blank casing. After installation, the well was developed by surging and bailing, and then sampled on April 14, 2003, with a clean, unused, disposable bailer. A summary of the laboratory analytical results is provided in Table 2. Well development and sampling field data sheets are included in Appendix B. The location and top-of-casing elevation of each newly installed was surveyed by a licensed surveying subcontractor. The survey point on each well casing was permanently marked and groundwater levels were measured from that point. _i TTF QMR Q2-03-FINAL(7-2"3):JEE Page 3