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Mr. Brian Zamora <br />Page 3 <br /> <br /> In the absence of a RWQCB wet weather restriction the LEA <br /> should consider restricting the testing and use of green <br /> material ADC during wet weather periods if there are other <br /> than strictly ground or surface water quality concerns. <br /> .Possible examples include landfills that have unresolved <br /> violations of the leachate control minimum standard (14 CCR <br /> 17704), or where there are considerable potential public <br /> health and safety or environmental concerns regarding <br /> leachate. If a wet weather restriction is applied, <br /> application of green ma~erial ADC should not occur when <br /> there is precipitation, or when there is a forecast of >40% <br /> chance of precipitation within 12 hours of application time <br /> in the vicinity of the landfill. [The recommended <br /> restriction is based on industry standards for foam A~DC.] <br /> <br /> In the absence of RWQCB or LEA wet weather restrictions, <br /> operators disposing 50 tons per day or more of waste must <br /> control excess water infiltration by satisfying one of the <br /> following: <br /> <br /> 1. The total area of the exposed shredded green waste <br /> used as cover must meet the wet weather requirements <br /> specified in 14 CCR 17683{e) . <br /> <br /> 2. On a daily basis, the amount of rain water that <br /> could percolate shredded green material cover must not <br /> exceed the'amount of rain water that would infiltrate <br /> an uncovered refuse whose area is limited to the 14 CCR <br /> 17683(e) specifications. The percolating and <br /> infiltrating water may be calculated using the <br /> Hydrologic Evaluation of Landfill Performance {HELP) <br /> model or a water balance method, or measured by <br /> standardized field or laboratory procedure. <br /> Percolating water must be based on the thickness and <br /> area of shredded green material cover. In calculating <br /> infii~ra~ing water, the .area of uncovered refuse must <br /> be computed for wet.weather using the equation provided <br /> in 14 CCR !7683(e). Data input must be based on site <br /> specific values. <br /> <br /> (1) The operator must apply shredded green material to a <br /> minimum compacted depth of six (6) inches. Insufficient <br /> compaction or coverage is considered a performance failure <br /> and a violation of the cover standards under 14 CCR 17682. <br /> Sufficient compaction effort shall be determined during the <br /> demonstration and should be based on the ability of <br /> <br /> <br />