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CGRS, Inc. <br />2.3 Soil Bovines <br />Up to ten soil borings will be drilled by hollow stem auger techniques at locations depicted on Figure 3. <br />Soil samples wilt be collected on five-foot intervals using asplit-spoon sampler. Boring logs will be <br />constructed and will include interpretations of soil characteristics, conditions encountered during drilling, <br />sample locations, and any other observations pertinent [o the soil boring operation. <br />2.4 Monitorine Well Installation <br />Soil borings will be converted to two-inch diameter monitoring wells. The wells will be installed and <br />screened from approximately five feet above the groundwater table to the vertical limit of the well. The <br />monitoring wells will be constructed using two-inch diameter, flush threaded, schedule 40 PVC casing and <br />factory slotted screen. Soil boring and groundwater monitoring methods and procedures are presented in <br />Attachment A. <br />2.5 Groundwater Level Measurements and Chemical Analyses <br />In soil borings completed as groundwater monitoring wells, the ground surface elevation of each boring <br />and/or monitoring well will be surveyed to the nearest 0.01 foot, and referenced to an arbitrary datum if <br />actual elevations cannot be determined. The areal location will be surveyed to the nearest 0.5 feet. <br />Groundwater level measurements will be taken in the borings and wells by using an electrical water level <br />indicator. This data will be used to construct a groundwater contour map, which will assist in characterizing <br />groundwater flow direction and the hydraulic gradient of the water table surface. <br />The hydraulic conductivity will be estimated by performing slug and/or aquifer testing. Prior to initiating the <br />pilot project, groundwater quality samples will be obtained and analyzed for pH. TSS. TDS, and other <br />relevant parameters identified in the laboratory leaching tests. Samples will be obtained from no less than <br />one up-gradient and two down gradient wells. The anticipated locations of the monitoring wells are depicted <br />on Figure 3. Typical monitoring well constmction details are described in Attachment A. <br />2.6 Water Quality & Hydrogeoloeic Monitorine <br />The effects on groundwater quality and hydrology as a result of coal ash burial will be evaluated by placing <br />roughly 400 tons of coal ash within a trench at the location shown on Figure 3. The coal ash will be placed <br />so that the water table intersects the coal ash and that any fluctuation of the water table will be within the <br />coal ash bed. The coal a.ah will he buried in a trench measuring 10 feet in width, 100 feet in length and <br />roughly 10 feet in depth. <br />In order to evaluate hydraulic characteristics of bottom ash and fly ash, one-half of the trends will be filled <br />with fly ash. A native soil divider will be left and the other half of the trench will he lillcd with bottom ash <br />and fly ash. Bottom ash will he placed in the lower one-half of the saturated portion of the trench and tly ash <br />3 <br />