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<br />same qualii.y as those used in the batch plant. <br />Should spill or seepage occur, the liquid and <br />absorbing material will be scraped up and <br />processed through the plant along with what- <br />ever material is being batched at the time. <br />The replacement of the berm and driving sur- <br />face material will be replaced with material <br />of the nature required in the asphalt mixing <br />process. If a spill or seep were to occur, <br />there would be no contamination of ground <br />water due t^ the high clay content of the <br />soils within the plant site. <br />r3. The= apr,l i r_~ati.;'ut rlor~s not discuss how the ponds wi 7.1 be <br />r un!-; I-rt.u:.ti~_~d, or' thte natur-e of rnr~terietls and t.h'~eir aizr--~ <br />grad at~.c.in i.o L; r= a=.~~d. Al~aa, :infc~~rmatinn =hn~_tlri be pru•.tdE'c~i <br />c, _. to where si.l~t (frort•~ cle_~ar:-outs) will. I:~e~ deoos.tted and haw <br />i't. will. 6e used. The a3ppli._ation .=..hnu7.d provider a discc.isst.on <br />n~f sst:ahility and )ustii~y t.he. use of slopes less than ?: 1.. <br />The ponds will 6e constructed by excavating <br />below the existing ground surface to the <br />depths noted on pages 9 and 10 of the applica- <br />tion. The freeboard far each pond will be at <br />the existing ground surface as shown in sheet <br />4 of 7. <br />The nature of the material to be used in <br />construction is the native soil that er.ists on <br />site. In this particular location the soil is <br />within the SOVW mapping unit and erhi6its <br />characteristics more like the clayey soils of <br />the Heldt series (mapping unit 26-C, sheet 7 <br />of 7). Side slopes in the ponds will be 2:1 <br />as shown in the Typical Dam and Spillway <br />detail ^n sheet 4 of 7. Slopes on the face of <br />the spillway will be shallower due to getting <br />the correct fall far the draining device to <br />6e used and because the gentler slope will <br />prevent movement of the riprap on the <br />spillways and at the drain pipe (sheet 4 of <br />7). <br />One other reason for the flatter slopes on the <br />spillway is due to the necessity to waste (or <br />balance) material excavated from the ponds. <br />Otherwise this clayey sail would have to be <br />stockpiled and its stabilization and revegeta- <br />tian would be difficult. <br />Fonds will not be cleaned out. They will 6e <br />reclaimed insitu as they fill with sediment. <br />However, the ponds have been sized in such a <br />manner that replacement is not er.pected t^ <br />occur except possibly only once. It is impar- <br />4 <br />& Environmental Servi <br />