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Concrete Pumping for 3 cu. yds. of concrete to fill the tank). Tank dimensions will be approximately 4 ft. diameter by 6 ft. 6 in. high. The tank top and outside edge will be located by probing with a manual sampling auger. Two 12 in. holes will be cored through the concrete floor in the Transmission Building, one in the center of the tank, and the other over the outside edge of the tank wail, based on a 4 ft. diameter, as shown in the revised Figure 5. A regular auger will be advanced manually through the hole in the concrete over the center of the tank, until the tank is encountered. This will establish the depth of the tank below the concrete floor. A second boring, offset slightly from the first, will be advanced manually to a point 8 inches abbve the.top:of the tank. A soil sample will be secured using the core sampler and slide hammer from the manual sampling kit. ..-h The sample tube will be capped and placed in an iced chest for transport, under chain of -r..�2..� -fir. 1 custody, to a certified laboratory for analysis. Ca n4-,_, A third boring will be advanced through the second hole in the concrete, to find the outside wall of the tank. The probe will be moved as necessary until the location of tank wall is determined. This will allow determination of the distance from the tank, and boring angle, for the probe to secure the sample from below the tank(see Figure 5R). The sample will be placed in an iced chest and transported under chain of custody to a certified laboratory for analysis. Soil cuttings will be stored in a labeled drum on-site pending receipt of analytical results. Similarly, the concrete slab will not be repaired until the analytical results have been received and evaluated, in case additional action is required. A section of pavement in front of the Parts Building will be removed and the manual sampler equipment will be used to probe for the presence of underground tanks. Should a tank or tanks be found, the location will be marked and a permit application to remove the tanks will be submitted to the EHD. If tanks are not found,the pavement will be restored. 6.0 Report Preparation This section is unchanged from the Work Plan. 7.0 Health and Safety A Health and Safety plan to support field activities is included in Appendix B as part of the Work Plan dated 1128/05. 2 i