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J <br /> i <br /> I <br /> ! ! EXHIBIT A <br /> jf <br /> j MINIMUM REQUIREMENTS FOR NUMBER AND SPACING <br /> OF PITS AND BORINGS FOR SAMPLING SOILS AND ROCK <br /> N er sand spacing ~ Level 2 sampling pits or borings and Level 3 test borings should conform to the following <br /> <br /> g id infs. For Level 3, the Geotechnical Engineer will select the locations of borings and the type, frequency, and depth <br /> of mplles and/or field strength tests. <br /> delpnes for Spacing of Borings <br /> Maximum distance between borings, feet <br /> Project Horizontal stratification of soil or rock Minimum number of borings <br /> Uniform Average Non-uniform <br /> fti-story buildings 150 100 50 4 per structure <br /> e or! two-story buildings 200 100 50 3 per 1 structure <br /> a divisions, devebpment site 500 200 100 2 per arxe <br /> rle5s acres <br /> divisions, development site 500 200 100 Minimum 8 per site with 3 <br /> r mere acres per soil unit <br /> dga piers, abutmerrts, 100 100 25 <br /> e vision towers, etc. <br /> R always, sewers, pipelines 1000 500 200 - 100 <br /> rn~ Pis 500 200 100 - 50 <br /> (f r compacted fill) <br /> E rth dams, dikes 200 100 50 <br /> Space preliminary borings 200 to 500 feet apart so that the area between any four <br /> N bite of wide extent borings includes approximately 10% of the total area. In detailed exploration, add <br /> borings to establish geological sections at the most useful orientation. <br /> D velbpment of site on soft Space borings 100 to 200 feet at possible building locations. Add intermediate <br /> mptessible strata borings when buikding site is determined. <br /> L Ipad warehouse building or Minimum of 4 borings at comers plus intermediate borings at interior foundations <br /> I rge area suffiaent to define subsoil profile. <br /> S pd stability, deep cuts, high Provide 3 to 5 borings on line in the critical direction to provide geobgical section <br /> b2lnkments for analysis. Number of geological sections depends on extent of stability <br /> roblem. For alive slide, lace at least one borin u slo of slidin area. <br /> i <br /> t <br /> I <br /> Page 1 of 2 <br /> <br />