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vu. A. 1 ' B. C. ' D. 1 RECOMMENDATIONS FOR TOPSOIL SPREADING do SEEDING: Topsoil Placement: Topsoil stripped from the contruction site and stored in the designated topsoil storage area will be used during reclamation of all disturbed land surfaces. Procedures for topsoil stripping and stockpiling shall be as directed by Atlantic Richfield's Environmental Coordinator and shall be in conformity with the MdcR plan as necessary to protect and preserve the topsoil. On all surfaces requiring topsoil and seeding, the stored topsoil shall be spread to an even depth of 12-18 inches, using equipment suitable for topsoil replacement. Those areas with backfill compacted to 85% of maximum density shall be scarified to a depth of at least 12 inches before topsoil is spread. This will provide a contact with the subsoil material, reduce slippage of topsoil on steeper slopes, and promote root penetration below the topsoil. Other areas requiring topsoil should be fairly rough before the application of the topsoil. Seedbed Preparation: A seedbed favorable to seedling establishment shall be prepared prior to seeding, whether seeding is to be accomplished through broadcast methods or with a drill. Seedbed preparation on 3:1 or lesser slopes shall consist of discing or harrowing the replaced topsoil so that a firm, firable (not cloddy) bed is available for seeding. On slopes greater than 3:1, the topsoil shall be dragged or hand-raked as appropriate. All discing, harrowing and drill seeding shall be accomplished parallel to slopes on steep topography end at right angles to the prevailing winds on relatively flat areas. This will greatly reduce erosion problems before vegetation is established. Planting: When a drill is used for seeding, seeding depth shall be regulated to approximately 1/2 inch deep, depending on the seed being used. If broadcast seeding is used, the recommended rates shall be doubled, and the area lightly dragged or harrowed following seed application to cover the seeds. Tn small areas or on steep slopes where dragging or harrowing cannot be accomplished, the seeds shall be covered by alight hand raking. Planting shall be accomplished in late fall preferred because inclement weather is operations and Pall planting allows the seed are allowed to over-winter in the ground, improved in many species. or early spring. Late fall is usually less likely to affect revegetation to over-winter in the ground. If seeds germination the Yollowing spring is Soil Amendments: Fertilizer and mulch shall be used, as necessary, to stimulate plant growth and thus impede erosion. Fertilizer shall be applied at rates indicated by soil analyses prior to planting. Mulch shall be used to impede erosion and produce an environment conducive to seedling establishment. Straw, native hay, wood chips, or hydromulch shall be used in most areas, although more costly mulches such es jute netting may be required on steep slopes. 14