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Bonding Calculations Northfield Partners LLC <br />Northfield Exploration Notice of Intent Feb. 24, 2005 <br />Regrade Temporar~Dril~ Trails Cost <br />' No dozer cuts are anticipated during construction of drill trails. Access to drill <br />sites from existing trails will be made by cutting and clearing trees, shrubs, and <br />debris. <br />Reclamation of temporary drill trails can be accomplished with a dozer or <br />backhoe at a rate of 500 ~'eet/hour. <br />1500 feet (12 ft. wide road, level to slight grade) x 1 hour/500 feet x <br />$154/hour= $462 <br />Subtotal $462 <br />Backfill Mud Pits <br />One pit will be constructed at each site to contain the drill cuttings produced <br />during the air lift drilling operations. Each pit will be approximately 2 feet wide x <br />10 feet long x 4 feet deep, or an equivalent volume. <br />$100/hour backhoe x 1 hour/pit x 3 pits = $300 <br />Subtotal $300 <br />Plu_gine Drill Holes <br />Materials: (Octo plugs @ $3.25 ea. x 3 holes) + (1 sack concrete x $9.00/sack <br />x 3 holes) _ $37 <br />Labor: 3 holes x 2 man hours/hole x $20/hr. _ $120 <br />Subtotal $157 <br />Page 2 <br />