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1 shall be at least 2 percent. The final bottom slope of <br /> 2 the drainage layer shall be at least 2 percent. <br /> 3 Permeability of cap shall be dem3nstrated in the field <br /> 4 and laboratory to be at or below 10-7 centimeters per <br /> 1 <br /> 5 second. <br /> 6 � P-15 Inspections: The drainage system shall be inspected <br /> 7 monthly during the months of October through March and <br /> g after major storms. During April through September, <br /> g the inspection shall be performed quarterly. <br /> 10 *P-21 Compacted Earth Barrier: To prevent potential lateral <br /> i <br /> 11 migration of any remaining hazardous wastes, California <br /> 12 regulation (Title 22 , Section 67228 (f) (5) ) requires a <br /> barrier layer, to a depth as low as <br /> 13 compacted earth barr y <br /> 14 that depth to which the hazardous waste was deposited. <br /> 15 *P-21 Post Closure Use & Inspections: The proposed use of l <br /> 16 the closed area for wood storage will make inspection <br /> 17 of the asphalt surface more difficult. A record of <br /> lg each inspection shall be maintained at the facility. j <br /> lg P-23 Sealing Asphalt: It shall be necessary to schedule an <br /> 20 inspection and seal cracks in the asphalt prior to the <br /> 21 beginning of each rainy season. <br /> 22 <br /> 23 *Note: These items apply if the final, agreed upon method of <br /> 24 closure involves leaving some contaminated soil in <br /> 25 place and capping the site. <br /> 26 <br /> 27 <br /> E-2 <br /> COURT PAPER <br /> .TAT'19 O/CALITOXHIA <br /> STO. 113 INEV. ••731 <br /> (b 34769 <br />