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U <br /> • 42 Water Bearing Formation Charactenstics <br /> The log-log drawdown graphs presented in Attachment A in Figure Al to A6 are presented so <br /> that the data can be rapidly compared to available type curves Pump test analysis theory is not <br /> strictly applicable at the pumped well and therefore will not be applied to the pumping well data <br /> (Figure Al) The hydrologic characteristics of the responding observation wells (Figure A2, <br /> MW-2, Figure A3, AS-1, Figure A4, MW-4,Figure A5, MW-3, and Figure A6, MW-6) are <br /> interpreted in this section <br /> Type curves contained in Krusernan, de Ridder, and Verweij (1990), Lohman(1972) and <br /> s+andard text references were examined to select appropriate type curves for determination of <br /> transmnssivity and storage coefficient <br /> The type curves selected for analysis of the early time data available from this constant rate test <br /> • were those for anisotropic unconfined aquifers experiencing an elastic response and for late tune <br /> data a delayed yield response Early time data is obscured for well MW-3 and late time data is <br /> not available for well MW-6 In addition, the response in the observation wells is obscured by <br /> other drainage phenomena, boundary condition effects, or minor variation in discharge rate <br /> (power fluctuations and unidentifiable causes) Partial penetration and dewatering effects were <br /> not considered in this analysis Actual type curve matching was performed using the software <br /> Graphical Well Analysis Package (GWAP, version 2 36) developed by Groundwater Graphics, <br /> Inc of Oceanside, California <br /> The transmissivities calculated using the GWAP type curves matched to the suitable drawdown <br /> data are presented in Attachment B As evident in the denved data presented below, a near well <br /> boundary exists between the pumping well (EW-1) and observation wells MW-4 and MW-3 <br /> This boundary is assumed to be the fill of the former tank removal excavation Two sets of <br /> hydraulic properties are presented — those not influenced by the boundary (MW-2, AS-1, and <br /> MW-6) and those influenced by the boundary (MW-4 and MW-3) These aquifer hydraulic <br /> properties are as presented in the table on the following page <br /> H 2 <br /> OGFOL A GROUNDWATER CONSULTANCY <br />