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~~~ ,~f~` <br />Migh s dium adsorption ratios SAR, and eleatriGa! conductivity, EC, values <br />are ty iGai of the area and as a result, morn tolerant species era included <br />in th final seed mixes. Par reclamation purposes, a topsail ar suitable <br />pla t growth medium that will be used an the top 6" at Gavar will be limited <br />to maximum SAfi vacua of 12 and ~~ value-of ~. Far the lower 12 ar 18" <br />a Gover material, depending upon the location, the maximum limits far <br />AR and EC will ba 25 and 15 raspsetiveiy. As regrading of an area <br />roceeds, sails which are prajeGted to be placed in the top 18 ar 24" of <br />saver wilt be sampled far SAR and Elf to determine the mast suitable <br />topsails and subsoils, Sampling wit! be done on a minimum frequency of <br />one per acre, appraxima#sly 240'Garners, and 2` depth intervals. in Gases <br />where spot SAR and EC levels are high, calGUlatpd blending ratios may <br />be used to maintain the values of the backfill material within the desired <br />range. <br />Roadside South Porkal and Roadside Refuse Disposal Area, The final <br />reclamation contours for the Ftoadsids South Portal area including the <br />Roadside Refuse Disposal Area (RSRDA) are shown of Exhibit 6G. <br />Crass-sections representing the existing and final grade ors shaven an <br />t*xhibit 26. Due to a tong history of mining an the site, original Contours <br />are net known. The final Gontaurs far the areas other then the RSRDA <br />were inferred from adjacent slopes and material balances. The final <br />contours for the RSRDA include 2-2.5h: 1v slopes between 1t7' - i9` wide <br />benahes an 30 - 44' elevation intervals, resulting in an aver all slaps of <br />1 th 2 5h~1 Th b h ip h s a de of rax'mstel 5°/ t <br />~~ <br />~ ww~f <br />~a-s (Rev. a~of) <br />above the pate, a permanent diverson w~A be established on the east ssde ~, <br />above the pile. This diversion will convey run-off from above the pile ta~'' <br />the south and veil! discharge south of Sediment Pond g into a highway <br />culvert. Design for the diversion is shown in Appendix f 4-6. Tha 18" of <br />nontoxic material required to Gover the refuse pits will Game from a the <br />RSRC?A borrow area located above and east of the pile shown on Exhibit <br />ess an , v. s snc es w av gra app i y ° 0 <br />the inside and approximately 2% north to toward a drainage Ghannei. ~~n-- <br />Existing saver above the first bench will bs graded off of the present scope <br />and used as Gover baiaw the first bench. Refuse material Gut from the <br />pi(s to establish the benches will bs placed in anaxtensian of the piie to ~~ <br />the north and on tap of the pile. This materiai will ba spread and <br />aampaetsd to 9t}% of its maximum dry density in harizontai lifts net to ~- ``~' <br />exceed 2' in thiGknass, Ta establish permanent drainage con#ral for areas ~ ~'~~ <br />~' <br />6C. 8aii with high and vsty high EC values were eliminated far the borrow <br />area quantity calcuiatian, ,~. <br />