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ENGEO <br /> INCORPORATED <br /> <br /> <br />5150.100.101 <br />May 2, 2008 Page 13 <br />6.3 GENERAL SITE CLEARING <br /> <br />Clear areas to be developed of all surface and subsurface deleterious materials including existing <br />building foundations, slabs, buried utility and irrigation lines, pavements, debris, and designated <br />trees, shrubs, and associated roots. Clean and backfill excavations extending below the planned <br />finished site grades with suitable material compacted to the recommendations presented in <br />Section 4.5. ENGEO should be retained to observe and test all backfilling. <br /> <br />Following clearing, strip the site to remove surface organic materials from the ground surface to <br />a depth of at least 2 to 3 inches below the surface. Strippings should be removed from the site. <br /> <br />6.4 OVER-OPTIMUM SOIL MOISTURE CONDITIONS <br /> <br />The contractor should anticipate encountering excessively over-optimum (wet) soil moisture <br />conditions during winter or spring grading, or during or following periods of rain. In addition, <br />wet soil conditions may be encountered during the cutting operations perched on more resistant <br />rock below. Wet soil can make proper compaction difficult or impossible. Wet soil conditions <br />can be mitigated by: <br /> <br />1. Frequent spreading and mixing during warm dry weather; <br />2. Mixing with drier materials; <br />3. Mixing with a lime, lime-fly ash, or cement product; or <br />4. Stabilizing with aggregate, geotextile stabilization fabric, or both. <br /> <br />Options 3 and 4 should be evaluated and approved by ENGEO prior to implementation. <br />