minimum of 30 samples A minimum of five samples &gt;500m 3 to 1500 m 3 A minimum of 50 samples A minimum of 10 samples &gt;1500 m 3 A minimum of 75 samples A minimum of 15 samples TABLE 3 MINIMUM CONFIRMATION SAMPLING REQUIREMENTS FOR EXCAVATION Floor Area (m 2 ) Floor Samples Sidewall Samples 1 &lt;25 2 2 &gt;25-50 2 3 &gt;50-100 3 3 &gt;100-250 3 5 &gt;250-500 4 6 &gt;500-750 4 7 &gt;750-1000 5 8 Note 1 Sidewall samples should not all be taken from the same wall, and should represent worst-case. (a) Determine the FOC in the area between the water table and the soil surface. 1. Soil samples from at least four continuous borehole cores but not necessarily undisturbed soil samples must be collected at the phase two property for the purpose of defining FOC. 2. The samples must be taken from soil between the soil surface and the top of the water table. 3. The four sample locations must be chosen so as to provide results for natural (non-anthropogenic) FOC at the property. 4. The samples must be taken from soil of the same soil type present in an area where a contaminant is present at a concentration greater than the applicable site condition standard for the contaminant. 5. A minimum of one composite soil sample for each sampling location is required for FOC determination. 7. The FOC for the phase two property shall be the mean of all the soil samples analyzed for FOC