1988-07-14_REVISION - M1977378 - Laserfiche WebLink

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- - � 9 areas, haul roads, pit operations, toxic backfill materials, tailing ponds, and inactive leach pads. Costs for a field spray vary from $500 to $900 per acre or $.08 to $.25 per ton of material processed. Table 3. Cost of Site Reclamation in $%Acre Item - 7 Standard Practice With Bactericides Site Grading - 1-,500 - 5,000 _ 1,500 - 5,000 Lime 40 - 1,200 40 - 40 Soil Cover 2,000 - 8,000 _-J1,000 - 2,000 Borrow Area 700 - 3,000 - - 350 - 800 Seeding _ 300 - 400 300 -- 400 Site Maintenance.' -- 700 - 2,000 -200 700 Engineering 500 - 1,000 - - 500 --_1,000 Bactericides _ 1,500 4,000 Bactericide Application _ 1 100_- _-_ 200 TCTAL _-- 5,740.-20,600 - ^5,490--14,140 SAVINGS 0X - 30% Case History An abandoned refuse area, the Route 43 Site in southern Ohio (Figure 3) ,_ -was ' studied - before- and - after reclamation with'first -generation---ProMac-products.--_-.The-- site was-divided-into two sections, each about 3 acres, and treated in August 1984. . The left half was treated- with--a�-combination-- of_ liquid spray and controlled release pellets after-=final- contouring.- - Following the treatment, both' sides were covered - with 6-8 inches of topsoil followed by fertilizer, agricultural -limestone, seed, and hay mulch. The rigtit half serves as the -control ----- Heterotrophic-microorganisms which-include bacteria,-.fungi, algae, and protozoa promote revegetation. Their proliferation indicates the quality of-the soil"environment.-''Soil 'samples' were analyzed annually. Table 4 shows that the treated area has more heterotrophic bacteria -than--the--control -area--and that heterotrophic populations are growing-- more-rapidly—in-the-cover soil. The study also showed that populations of the detrimental T. ferrooxidans increased more than 1000 times (Table _5) on both.sides;;but increased more slowly in the treated area, (Bohac, et'a1,1 1987).