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Foothill Landfill <br />Storm Water Pollution Prevention Plan <br /> <br /> <br /> <br />Page 66 <br />include deepening the sediment basin and stabilizing it with vegetation; modifying the <br />discharge pipe to allow for more impoundment and to discharge from the surface of <br />impounded water; stabilizing with vegetation portions of the borrow area that are not <br />active; and providing a perimeter sediment control measure between the borrow area <br />and the sediment basin. These improvements should help prevent future TSS <br />exceedances and help control the amount of iron discharged from the site at ST-3. <br />3. Perform additional internal sampling and analytical testing of water and soil samples <br />to be able to understand how iron is being introduced to storm water runoff. <br />The following are the tasks planned for the Level 2 ERA Plan implementation. However, the <br />tasks and schedule are subject to change based on the results and conclusions of the <br />investigative testing. <br />Table 12.3.1.C – Level 2 ERA Plan Tasks and Schedule <br />Drainage <br />Area <br />Task Objective Implementation <br />Date <br />ST-6 (H) Remove all industrial activities <br />including the e-waste collection <br />bins, the small “bone yard” of parts <br />and tires, and the small shed that <br />contains maintenance related <br />hazardous materials. <br />To convert this drainage area to all <br />non-industrial and to eliminate the <br />ST-6 sampling. <br />April 1, 2018 <br />ST-1 and <br />ST-7 <br />Remove these non-industrial <br />discharge points from the sampling <br />program. <br />To eliminate these non-industrial <br />monitoring points. <br />Effective <br />immediately <br />ST-3 (C) Collect soil samples from the <br />drainage area and test for the <br />presence of iron. Perform a <br />leachate test to simulate contact of <br />water with the soil and test for the <br />presence of iron in the water. <br />To provide supporting data for the <br />natural background pollutant source <br />demonstration <br />March 1, 2018 <br />ST-3 (C) Evaluate options that include <br />deepening the sediment basin and <br />stabilizing it with vegetation; <br />modifying the discharge pipe to <br />allow for more impoundment and <br />to discharge from the surface of <br />impounded water; stabilizing with <br />vegetation portions of the borrow <br />area that are not active; and <br />providing a perimeter sediment <br />control measure between the <br />borrow area and the sediment <br />basin. <br />Source reduction and pollution <br />prevention to address both iron and <br />TSS NAL exceedances. <br />October 1, 2018