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KLE[NFELDER <br /> 1 <br /> 3 FIELD ACTIVITIES <br /> 3.1 OBJECTIVE .AND SCOPE <br /> r On November 14 through 16, 1988, three ground water monitoring wells were installed on <br /> the subject property to provide a means for assessing the baseline water quality beneath the <br /> property for the presence of chloroform. <br /> 3.2 GROUND WATER MONITORING WELL INSTALLATION <br /> L3.2.1 DRILLING PROCEDURES <br /> Three 4-inch-4iameter ground water monitoring wells, MW-1, MW-2, -and MW-3 were <br /> installed in 10-inch-diameter soil borings on site. A truck-mounted drill rig ui ed:with <br /> g g e 4 PP <br /> a 10-inch hollow-stem augers was used to install the three monitoring wells. <br /> During drilling, an experienced environmental geologist classified the soil .and logged the <br /> boreholes. Soil samples were collected with an unlined Modified California Sampler at 5- <br /> foot intervals'for lithological control. <br /> Monitoring well, MW-1 was. drilled.-to a depth. of..,59,. eet`after ground water was <br /> encountered at 48 feet. The well casing was installed to a depth of 62 feet with a screened <br /> section from 42 to 62 feet. 2 <br /> _ <br /> Monitoring well MW-3 was drilled-to" depth,, of,59-fee after. ground water was <br /> encontered at 46 feet. The well casing was installed to a depth of 57 feet with a screened <br /> section from 37 to 57 feet. <br /> The !variance in depth to ground water is due 'to the difference in elevation at each ! <br /> monitoring well location. <br /> Details of the monitoring. wells are described in Section 3.2.2, Monitoring Well <br /> f Construction. Specific details of each monitoring well are contained on the boring logs <br /> # (Appendix B) and on Table 1 (Appendix A). <br /> 156-88-2362 3 <br />