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Approach and Sample <br /> Methodologies <br /> 5.1 Strategy and Justification <br /> Proposed sample locations are presented in Figure 5-1. Sample <br /> locations have been chosen to cover the main burn areas, spatial <br /> coverage of the pit and pyrolytic oil flow areas. Grab samples of <br /> burn residual and ash will be collect to document the types of <br /> compounds associated with the tire fire. Visual inspection of <br /> proposed sampling locations will be made by site personnel and if <br /> needed location may be moved to areas that were more impacted <br /> by the fire. In general, the placement, number and depth of the <br /> samples will be chosen to maximize the probability that the <br /> samples selected are contaminated. A statistical model was not <br /> used to develop the sampling scheme, any grid sizes, or the number <br /> of samples. These parameters will be based on the experience of <br /> E & E's senior technical team, the size of the assessment area, the <br /> most probable location of contamination, and importantly, scope <br /> limitations. <br /> 5.2 Sample Equipment <br /> The following equipment will be utilized to collect soil and water <br /> samples: <br /> Table 5-1 <br /> Sampling Equipment <br /> Medium Sampling Equipment Fabrication Dedicated <br /> Surface Soils Trowels Steel No <br /> Composite Pail Cardboard Yes <br /> Subsurface Soils Geoprobe®: Probe-Drive Sampler Steel No <br /> Liner Acetate Yes <br /> Subsurface Water Geoprobe®: Probe-Drive Point Steel No <br /> Tubing Teflon Yes <br /> Bailer Steel No <br /> Well Water Sample Jars Glass/Plastic Yes <br /> Sample Containers Sample Jars Glass/Plastic Yes <br /> Collection Bags Plastic Yes <br /> 09:C:\MyFiles\PROJECTTmcy_Tire\QASP\QASP_0339.wpd-11/30/98 5-1 <br />