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J. H, KLEINFEI_DER &ASSOCIATES <br /> 6.2.3 ANALYSIS OF SLUG TEST DATA <br /> I <br /> Transmissivity estimates provided from the slug test analysis are as <br /> follows: <br /> Location Transmissivity Transmissivity <br /> (Figure 2) {ft2 day (gpd/ft) <br /> MW-4 55.8 416.7 <br /> MW-6 44.5 337..3 <br /> RW--1 21.5 160.6 <br /> i <br /> Estimating storage coefficients from slug test data is not recommended, <br /> However, using the Cooper, Bredehoeft and Papadopulos (1967) method on <br /> MW-4 and MW-6 slug test data provides a storage coefficient value of 1 x <br /> i <br /> 10'5. A storage coefficient value of 1 x 10-2 to i x 10 -3 would be <br /> a more appropriate estimate based on the weakly confined conditions of the <br /> uppermost water-bearing unit (refer to Figure 7). a <br /> The estimated transmissivit values for the uppermost ppermost water-bearing unit <br /> (Zone IV), with a range of 160 gpd/ft to 415 gpd/ft, are low and suggest <br /> low yields when pumping is attempted. These estimated transmissvity <br /> values are consistent with the observed fine grained sediments and with <br /> the observed thickness (ranging from 2-1/2 feet thick at RW-1 to 15 feet <br /> thick at MW-4) of Zone IV. The calculated tran,missivity value of Zone IV <br /> E at location RW-1 (160 gpd/ft) will not provide the transmission capability <br /> to yield ground water at a rate sufficient to utilize conventional "deep <br /> well" recovery technology. <br /> 6.2.4 GEOMETRY VARIATION <br /> To illustrate the variation in thickness of the uppermost water bearing <br /> unit (Zone IV) across the project property an isopach map has been <br /> prepared (Figure 8), Thickness of Zone IV is shown to range from 15 feet <br /> (MW-4) to 2.5 feet (RW--1). Thickness at locations MW-1 and MW-2 is <br /> approximate due to the sampling technique (5- and 10-feet intervals; refer <br /> 53-87--443 <br /> 17 <br /> h\Ll <br />