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Borehole Log and Monitoring Well Construction Summary <br /> Austin Road Landfill, Manteca, California Page 4 <br /> 3.0 POST DRILLING ACTIVITIES <br /> 3.1 Well Development <br /> After the completion of the well construction related activities, each of the four installed <br /> monitoring wells was developed using an air lift system. Development continued until two <br /> conditions were met: (1) an equal volume of water utilized during drilling activities had been <br /> removed from the borehole and (2) field parameters (pH, specific conductivity, temperature, <br /> and turbidity) stabilized. Parameter stabilization is defined as the following for three <br /> consecutive readings: ± 10 % for specific conductivity, ± 0.1 for pH, and ± 1' Celsius for <br /> temperature. As requested by the RWQCB, a special goal of stabilizing the turbidity at levels <br /> less than 5 NTU's was fulfilled at each of the four monitoring wells during development. Field <br /> parameters were recorded on field logs during the development process. These field logs <br /> are included in Appendix C. Development activities occurred after a minimum of 48 hours <br /> had passed since the completion of grouting. Development water was containerized within <br /> lined roll-off bins positioned at each monitoring well location. After development was <br /> complete, samples were collected from the development water and analyzed at BC <br /> Laboratories, Inc. in Bakersfield, CA. Following the analysis of the development water <br /> composite sample, the groundwater was vacuumed from the sealed roll-off containers and <br /> pumped into the Forward Inc. landfill class II surface impoundment pursuant to RWQCB and <br /> San Joaquin County Department of Environmental Health recommendation. The analytical <br /> report of the results from the development effluent samples is included in this report as <br /> Appendix D. Table 3 provides details relating to the monitoring well development process. <br /> Table <br /> Development Details <br /> Borehole/Monitoring Development Volume of Field Parameters <br /> Well ID Date(s) Development Stabilized? <br /> Water al <br /> AMW-13B 12/4-5/2008 2000 Yes <br /> AMW-21 12/4/2008 2500 Yes <br /> 12/7/2008 <br /> AMW-22 12/7/2008 1500 Yes <br /> AMW-23 12/5/2008 3000 Yes <br /> 12/7/2008 <br /> 3.2 Well Survey <br /> Upon completion, each well was surveyed by Michael Quartaroli, California licensed surveyor <br /> number 4450. The surveyor's report has been included in this monitoring well installation <br /> report as Appendix E. Each monitoring well was surveyed for vertical and horizontal datum <br /> coordinates. Horizontal coordinates were recorded in state plane coordinates. Vertical <br /> measurements were recorded in feet above mean sea-level from the ground surface, the <br /> concrete pad at the base of the protective outer casing, the hinged lid of the protective outer <br /> casing, and the designated reference point on the top of the well casing. Table 4 presents <br /> data from the survey report. <br />