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� • 3/9y <br /> Z1 INC <br /> After removal of all liquid, the tank will have approximately 4 or 5 holes cut in the top by <br /> a concrete saw. Clean, dry, fill sand will be placed into the tank until it is completely <br /> backfilled. After backfilling, the former tank will have its surface repaired to prevent <br /> rainwater from entering it in the future. The rest of the former tank will be left in place. <br /> Task 3-Soil Aeration and Landfarming Operation <br /> Soil aeration and landfarming will be utilized to remediate the volatile and heavy fraction <br /> hydrocarbon impacted soil. <br /> This Remedial Action Plan assumes that volatile hydrocarbon and chlorinated <br /> hydrocarbon compound concentrations will be low enough (under 100 ppm) to meet all <br /> permitting criteria for VAD requirements for on-site aeration of the volatile fraction. <br /> Heavy fraction hydrocarbon stockpiled soil will be remediated by landfarming. <br /> During this period the stockpiled soil will be inspected on a weekly schedule to insure <br /> stability and integrity of the pads. The stockpiled soil will be watered to keep moisture <br /> content at optimum levels. Tillage of the soil will be made with a tractor or handheld 10" <br /> deep disc which will aerate the soil and allow maximum bacterial action. Horse or <br /> chicken manure will be applied as appropriate to increase nitrate levels in the soil and <br /> enhance the bacterial action. <br /> Periodic samples will be taken to monitor the progress of bacterial degradation of the <br /> hydrocarbons. Target goals for reduction of TPH-G are set at non-detection levels. <br /> Target goals for reduction of TPH-D are set at 100 parts per million. <br /> Task 4-Final Closure Report <br /> The final report will summarize all technical aspects of the operation and be certified by <br /> a California State Certified Engineering Geologist and submitted to SJCLHD for approval. <br /> Page 6 <br />