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` San Joaquin Workplan <br /> i <br /> jh <br /> TASK I FIELD TESTING F <br /> We propose to install a total of three additional exploratory soil borings at the <br /> subject property at the locations shown on the site plan which is included as <br /> Figure 2 of this proposal. Figure 2 also illustrates locations of previously <br /> installed monitoring wells at the subject property. The purpose of these <br /> ` supplemental soil borings would be to provide additional data regarding the <br /> presence of hydrocarbons in subsoils.Field screening of the subsoils samples <br /> will help to describe hydrocarbons persistence in a vertical relationship to <br /> groundwater. <br /> { All three of the exploratory soil borings will be completed as groundwater <br /> f monitoring wells.The additional groundwater monitoring wells will be utilized <br /> to evaluate lateral migration of hydrocarbons;lin groundwater,and provide data <br /> for assessing groundwater depths, gradient; direction of flow, groundwater <br /> quality, in-situ hydraulic testing andpossible future monitoring. <br /> Based upon the previous site investigation, we anticipate groundwater occurs <br /> beneath the subject property at depths ranging from 10 to 15 feet below the <br /> existing grade. Please refer to Appendix A at the end of the text which <br /> summarizes the methodologies to be used for the proposed study. <br /> TASK H FIELD TESTING <br /> i. <br /> s , <br /> In order to evaluate the feasibility of possible groundwater extraction and <br /> gradient control, it will be necessary toproperly characterize site-specific <br /> hydrogeologic parameters.The most significant parameters include porosity, <br /> groundwater gradient, saturated thickness, hydraulic conductivity and trans- <br /> ` missivity. j <br /> Aquiferporosity will be estimated in two ways.The first will be by comparison <br /> of soil type description with empirical relations. The second method will be <br /> ' from calculations using a soil bulk density. These two methods will provide a <br /> range of reasonable value for aquiferrporosi'ty. <br /> r I <br /> Project Number: JOAQ22192 :4 Page 5 of 11 <br /> I l <br /> t _- <br />