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APPENDIX B <br />FIELD PROCEDURES AND PROTOCOLS <br />B.1 DRILLING AND SOIL SAMPLING PROCEDURES <br />B.1.1 Drilling Methods - Groundwater Monitoring Wells <br />All borings will be advanced under the technical supervision of a Dames & Moore geologist or <br />hydrogeologist under the direction of a California Registered Geologist. The on-site geologist will be <br />present at all times during drilling to: <br />Technically supervise the drilling subcontractor; <br />Maintain a continuous log of materials penetrated by the borehole in accordance <br />with the Unified Soil Classification System. The logs will also include <br />indications of sampling depths, characteristics of the samples, the presence of any <br />odor or visible contaminants, PID readings, as well as information regarding the <br />type of rig used, drillers name, occurrence of water, rate of drilling, blow <br />counts, and other remarks. <br />Obtain and document soil samples; <br />4) Test soil samples, drilling cuttings, and atmospheric conditions within the <br />workplace with a PID: and <br />(5) Oversee implementation of Dames & Moore's Health and Safety Plan; <br />Drilling will be performed by hollow stem auger drilling methods equipped with 8-inch and <br />12-inch diameter hollow-stem augers. This drilling method can be performed without the introduction <br />of drilling fluids (which may mobilize contaminants) and allows for the collection of relatively <br />undisturbed soil samples through the hollow-stem of the auger while augers remain in the ground, thus <br />PROP06.005 <br /> B-1 <br />DAMES & N.I0ORE