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Kennedy,,'Jenlcs Consultants 5.4 Sample Collection Methods It is expected that the shallow soil beneath the pond, as deep as approximately 15 feet (inferred from well log of MW-5), will consist of clay loam and should be penetrable by a hand auger. Sampling staff will hand auger through the shallow soil profile to a depth of six feet below the base of pond-base materials, stopping at every one foot interval to log the soil texture class. Bulk soil samples will be collected at depth intervals of approximately 0-1, 3-4 and 6 feet below the base of the pond material at each of the four sample locations. The bulk soil samples will be transferred to a sealable plastic bag, with excess air removed from the bag before sealing. The hand auger and trowel/scoop will be decontaminated between sampling locations using a non-phosphate soap and potable water. Decontamination water will be discharged either to the aboveground tank if it is operational or to the Title 27 ponds. Upon completion of the sampling, holes will be backfilled. A label will be applied to each bagged soil sample indicating the sample name, and date and time collected. The sample name will consist of the soil sampling location name (see Figure 4), the depth and "S"for soil media. For example, sample name P1-1-S will be used for a soil sample collected at location "P1", at a depth of one foot below the base of the pond. Bagged and labeled samples will immediately be placed in a cooler chilled to about 4 degrees C. The samples will be transported under chain-of-custody procedures to a state-certified analytical laboratory. 5.5 Sample Analysis Soil samples collected.from the four within-pond sampling locations (P1 through P4) will be submitted for analysis using standard soil test methods for the constituents listed in Table 1. Because the soil underlying the 1-MG pond is not expected to contain hazardous wastes and is not being characterized for the purposes of offsite disposal, samples will be analyzed using analytical methods typically used for agricultural soils, and will not be analyzed using the California Waste Extraction Test at this time. 5.6 Quality Assurance/Quality Control (QA/QC) The analytical laboratory will observe its customary internal QA/QC procedures during analysis of the soil samples. This will include such measures as the analysis of method blanks, control spikes and matrix spikes. 5.7 Characterization of Background Conditions Onsite background conditions for chemicals of interest in soil will be characterized using data from soil samples collected from the onsite sampling locations in September 2005 and September 2006 (included in Appendix A). The data to be obtained from soil samples collected beneath the 1-MG pond will be compared with analytical results from the previously obtained onsite soil samples to evaluate the potential chemical impact associated with the 1-MG pond. Work Plan for Soil Characterization, Page 8 Musco Family Olive Company, Tracy, California O1�Orom' "rinjchA121020t0A-00 mu<wnihreltl4!eForuWoilcMaraFimpE-0nfl,,,rLpirol.0 dot