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r <br /> *\/ <br /> is 5 feet in length, will be used. The slug will be lowered <br /> rapidly into the well and the changes in water level measured with <br /> a pressure transducer while the aquifer returns to equilibrium <br /> (falling head test) . After the water level has stabilized, the <br /> slug will be removed and water levels again monitored as they rise <br /> toward the original water level (rising head test) . <br /> The data obtained from the aquifer tests will be graphed on semi- <br /> log paper and the curves matched to type curves for the <br /> corresponding hydrogeologic conditions (unconfined aquifers) . The <br /> method utilized in performing the analysis is outlined in Response <br /> of a Finite-Diameter Well to an Instantaneous Charge of Water <br /> (Cooper, Bredehoeft, Papadopulos; 1967) . <br /> Phase IV: Documentation of Findings and Risk Appraisal <br /> Following the completion of the monitoring well installation, <br /> aquifer analysis, and two rounds of groundwater sampling (separated <br /> by a three month period) , a summary report will be written which <br /> documents the results of the investigation. In addition, the <br /> report will assess the uses of groundwater in the vicinity of the <br /> site as well as the potential risks posed by the contaminated <br /> groundwater. Remedial action alternatives will also be discussed <br /> if appropriate. ' <br /> Please contact me with any comments or questions your agency may <br /> have regarding the proposed scope of work. Implementation of the <br /> proposed plan could begin within three to four weeks of your <br /> approval depending upon availability of a drilling rig. <br /> Thank you for your time and consideration. <br /> Sincerely, <br /> Michael A. Caprio <br /> Staff Geologist <br /> MAC:mac <br /> cc: Diane Henson, San Joaquin Local Health District <br /> Carlo Marianne, Stockton Scavenger Association <br /> 6 <br />