Laserfiche WebLink
at� maw <br /> a <br /> 4 <br /> 1 <br /> Union lee Company- Weber Slreel <br /> Phase H- Repaai of Findings <br /> ;'age t; <br /> i <br /> ;i <br /> tC iiii,l-icil?.N'l' O r,,yroItAGr <br /> WELT_ "1'111 IS JACOB <br /> 3 N A 4.1 X E-2 <br /> 4S 3.6 x E-3 2.8 x E-3 <br /> 7S 7.6 x E-4 6.1 x E-4 <br /> 9 6.6 x E-4 4.0 x E-4 <br /> There is amazing consistency between the calculated aquifer properties at each well, <br /> ` when calculated by the three different methods. However, the aquifer properties at each <br /> well vary greatly from those measured at adjacent wells. The grain size characteristics <br /> 4. <br /> and thickness of Sand 1 vary greatly across the site. It is not surprising then, that the <br /> aquifer properties of this sand would vary greatly across the site. Because of this fact, it <br /> would not be proper to assign an average T and S to the Sand I aquifer at this site. <br /> MEDIAL EXCAvATIONiSOILS CON AMINATION <br /> During February of 1991, the soils which were contaminated by the LUST release, at <br /> this site, were removed for remediation by re-excavation. Approximately 2,000 yards3 <br /> of soil were removed from the excavation. <br /> The limits of the contaminated soils to be excavated were defined by exploratory <br /> # trenching and side wall sampling. The general outline of the contamination had been <br /> defined by a soil vapor survey several months before. A report detailing the results of <br /> this survey was submitted to San Joaquin County in June of 1990. <br /> A map and cross sections of the exploratory trench is presented oil Plates 4, 5 and 6. A <br /> map of the remedial excavation is presented as Plate 7. <br /> Definition of the limits of the contaminated soils was complicated, somexl•`�at, by soil <br /> discoloration due to the presence of native and human deposited carbonae� material <br /> E (peat and wood debris) found during the course of the excavation. Because or this, a <br /> large number of sidewall samples were taken to define the contamination limits. A <br /> tabular summary of the sample results is presentee[ in Table 2. <br /> s;� <br />