Laserfiche WebLink
GENESIS ENGINEERING B REDEVELOPMENT <br /> 3.2.2 Subsurface Logging <br /> The Site geologist will log the subsurface conditions encountered in all of the Site borings; <br /> recording the information on a Drilling Log Form. Borings shall be logged as follows: <br /> • Descriptions of the soils will be in accordance with the Unified Soil <br /> Classification System(USCS) (ASTM D2488),with color descriptions made <br /> using a Munsell Color Chart <br /> • Soil descriptions follow the name of the predominant particle size <br /> • Dimensions of the predominant and secondary sizes shall be estimated <br /> Additional information that will be entered on the Drilling Log Form includes: <br /> • Boring identification <br /> • Location in relation to an easily identifiable landmark <br /> • Name of drilling contractor <br /> • Drilling method <br /> • Depth at which saturated conditions are first encountered <br /> • Sample depths <br /> • Zones of caving or heaving <br /> • Drilling rig reactions such as chattering,rod drops, and bouncing <br /> • Refusal <br /> 3.2.3 Surface Water and Sediment Sampling <br /> Surface water samples will be collected using one of two techniques. Where surface water <br /> depths are less than one foot or in flowing water, grab samples will be collected directly into <br /> laboratory-supplied sampling jars, either manually or using a clean transfer device (jar or <br /> sampling container attached to a sample holder). These samples will be collected from <br /> approximately mid-depth. For deeper water samples, a depth-sampling device (Kemmerer <br /> Sampler or equivalent) will be used to collect a sample from a depth of 1.5-2.5 feet below the <br /> surface. These samples will be transferred to laboratory-supplied and labeled sample <br /> containers. Multiple sample casts may be necessary to provide sufficient volume for field <br /> parameter testing. Tests for pH, conductivity, and dissolved oxygen will be carried out in the <br /> field. <br /> Depth-discrete sediment samples will be collected from 0-8 and 12-20 inch depths for <br /> analytical analysis. Sediment samples will be collected as standard core samples using a <br /> WILDCOTM 2-inch diameter core sampler to collect samples up to 20 inches in length. Field <br /> Lima Ranch 8 of 17 <br /> Site Characterization Work Plan Addendum <br /> April 2008 <br />