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Remediation Well Destruction Gregg Drilling and Testing Inc. personnel destroyed wells MP-1 and MP-2 on April 12, 2006, in the presence of an SJCEHD representative. The wells were pressure grouted with neat cement. The traffic rated vault boxes covering each well were removed, and the surface was patched with ready-mix concrete to match the surrounding sidewalk surface. DWR well destruction forms for MP-1 and MP-2 are included in Appendix C. Monitoring Well Destruction Woodward Drilling Company (C-57 #710079) destroyed damaged well MW-3 on June 16, 2006, in the presence of an SJCEHD representative. Based on field observations of the condition of well MW-3, Stratus, SJCEHD, and Woodward Drilling personnel agreed that placing bentonite chips within the well casing was the best available method of destroying the monitoring well. Following placement of the bentonite chips, the traffic rated vault box covering the well was removed, and the surface was patched with concrete. The DWR well destruction form for MW-3 is included in Appendix C. A field data sheet documenting activities completed on June 16, 2006, is presented in Appendix D. Well Development and Sampling Stratus developed wells MW-13 and MW-14 on April 20, 2006, by surging with a plastic bailer followed by groundwater pumping. Approximately 10 well casing volumes (108 gallons) were removed from well MW-13 during development. Well MW-14 pumped dry during development activities and may be re-developed at a later date. Stratus returned to the site on April 24, 2006, to sample newly installed wells MW-13 and MW-14. The second quarter 2006 groundwater monitoring event was also completed at this time. Purge groundwater samples were collected from each well using a new plastic bailer. The groundwater was subsequently transferred to laboratory supplied glass vials (voas) and stored in an ice-chilled cooler. Strict chain-of-custody procedures were followed from the time the samples were collected until the time the samples were relinquished to the laboratory. Field data sheets from the well development and groundwater sampling events are presented in Appendix D. Wells MW-13 and MW-14 will be incorporated into the quarterly groundwater monitoring program. Waste Management Drill cuttings and wastewater were placed in DOT-approved 55-gallon steel drums and stored on-site pending disposal. A sample of the soil cuttings was collected and analyzed to evaluate the proper disposal facility for the soil. Clearwater Environmental, Inc. transported the soil and groundwater to licensed facilities for disposal. Surveying Hunter Surveying, Inc. of Orangevale, California, surveyed the locations and elevations of each newly installed, and previously existing, well on June 8, 2006, under the direction of a California licensed land surveyor (#7722). Well elevations were established to the nearest 0.01 vertical feet. The California State Plane Coordinates, latitudes, and longitudes of each well were also K;\Apache PlasticslReportsxapache-scm-assessment report2006,doc Page 8 5TRA TU5