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6 . 3 Alternative Design : 11/2: 1 or 1 : 1 Ratio Pit Slope Walls <br /> An alternative design would involve the excavation of the open <br /> pit with 11/2: 1 or 1 : 1 ratio pit slope walls . This alternative <br /> would allow the washing and screening of those additional <br /> mineral reserves that would otherwise be left in-situ in the <br /> pit walls for long-term slope stability as required by county <br /> ordinance . Excavation of this material would require a <br /> variance from the County Planning Department , and would be <br /> addressed by the Reclamation Plan . A Slope Stability Report <br /> would be required . Final pit slope walls would have to be <br /> restored to a 2 : 1 ratio. Landmark Lathrop Group, LLC feels that <br /> the amount of sand reserves lost to the 11/2: 1 slope versus the <br /> 2 : 1 slope are insignificant and will not be considered as an <br /> option at this time . <br /> Landmark Lathrop Group, LLC <br /> 2 - February 3, 2000 <br />