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Groundwater Well Installation Work Plan Sharpe Army Depot <br />Lathrop, California <br />Ahtna Environmental, Inc. 15 <br />3.4 Field Documentation and Photographic Record <br />Ahtna will maintain field documentation sufficient to recreate field activities. The following information <br />will be recorded: <br />•Location <br />•Date and time <br />•Identity of people performing an activity <br />•Weather conditions <br />•Logs of observations and activities conducted <br />•Sample identification numbers and chain of custody numbers <br />Field measurements and calibration results (including numerical values, units, and identity of the <br />instrument) are recorded on a field log form (Appendix A). <br />During construction of each extraction well, as-built diagrams of each well will be prepared by the Field <br />Geologist (Appendix A). <br />3.5 Schedule <br />Well installation activities are anticipated to begin in summer 2021.