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which is three times the Design Standard and operate as a lined water storage cell. <br /> Monitoring and release requirements are increased from monthly reporting to weekly <br /> reporting for liners that meet the Performance Standard. At the completion of <br /> construction, the liner is subjected to a minimum 90-day leak test as described in the <br /> guidelines. <br /> Topsoil and Revegetation <br /> Revegetation will only include grass seeding of disturbed areas. No tree or shrub <br /> planting is planned around the perimeter of the reservoirs. In areas reclaimed for <br /> agricultural purposes, the site will be graded with the native topsoil and planted with <br /> crops at the discretion of the property owner. Where required, topsoil will be replaced to <br /> a depth of 6 to 12 inches. Topsoil will be placed after backfilling and rough grading is <br /> completed. As an area is reclaimed, runoff or excess water from adjacent areas will not <br /> be allowed to flow over slopes being graded and seeded. If needed, berms or channels <br /> will be constructed to divert excess water and dispose of it in a safe and non-erosive <br /> manner. <br /> Seeding of disturbed areas will be done as areas are finished with preparation including <br /> grading and topsoil spreading. Seeding will be most successful if done between mid- <br /> November and the end of April. Seeding can be performed in May, if necessary, but after <br /> May it is not advisable to plant. Seeding before November is not advised as the potential <br /> for a warm growth environment and early germination would likely result in a major <br /> failure of the revegetation and require reseeding. <br /> Fertilizer may be applied to re-soiled areas in a manner that will encourage emergence <br /> and survival of the grasses without encouraging competition from weeds. Starter <br /> fertilizer can be applied before, or at the time of, seeding. If necessary, full fertilization <br /> will be applied after emergence. Fertilizer mixtures will be based upon soil tests made on <br /> samples taken from re-soiled areas prior to seeding. <br /> If a significant invasion of noxious weeds occurs after seeding, the weeds will be mowed <br /> before they can go to seed. The areas will be mowed periodically for additional control <br /> as needed. Mechanical control will be used as a first priority. Chemical methods will only <br /> be used if no other alternative produces acceptable results. <br /> Periodic inspection for noxious weeds, at least once a year early in the season, will be <br /> done. The weed inspection will search for not only the expected species but also any <br /> new List A or List B species introductions. It is likely that non-noxious and List C species <br /> will also be found. Non-noxious weeds, which are often native invaders, do not need <br /> to be controlled, but if the population of a List C species is controllable then it will be <br /> included in the control program. List C noxious species are problematic but are usually <br /> not as serious as List B species. <br /> Specific information regarding weeds is included in the Biological Resource Inventory <br /> included with Exhibit H. Aggregate Industries utilizes an integrated weed management <br /> protocol to manage weeds on their active mining sites this protocol includes: <br /> 1. Management Objective <br /> Manage noxious weeds and plant pests within the permit area. <br /> Aggregate Industries—Tucson South Amendment—MLRB 112 Permit Application <br /> Exhibit E-6 <br />