New Search
i <br /> EXHIBIT A <br /> ~ ~ MINIMUM REQUIREMENTS FOR NUMBER AND SPACING <br /> OF PITS AND BORINGS FOR SAMPLING SOILS AND ROCK <br /> N ~ ber and sparing of Level ~ sampling pits cx borings and Leve13 test borings should conform to the following - <br /> <br /> g ' roes. For level 3, the (3eoteChnical Engineer wiQ select the locations of borings and the type, frequency, and depth <br /> mples and/or field-strength tests. <br /> defines for Spacing of Borings <br /> Maximum distance between borings, feet <br /> project Horizontal stratification of soil or rods Minimum number of borings <br /> Uniform Average Non-uniform <br /> cry buildings ~ 150 1.00 50 4 per stnx~ure <br /> or Mlwo-story bupdings 200 100 50 3 per stnxture <br /> divisions, development site 500 200 100 3 per acre <br /> 4 less acres <br /> dirrisions, development site 500 200 100 12 per site + 3 per unit <br /> 4 more acres <br /> piers~.abut~ 1 - 2 for each foundation <br /> towers, .eta 100 100 25 unit <br /> ys, seyver's, :pipelines 1000 ~ 500 200 -100 <br /> (f ~ ed fill) 500 200 100 - 50 <br /> Balms, dikes 200 100 50 <br /> Space preliminary borings 200 to 500 feet apart so that the any between any four <br /> situ 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 /> of site vn soft Space borings 100 #0 200 feet at.possrble building locators. Arid intermediate <br /> strata borings when buiiduig site is determined. <br /> L warehouse building or Minimum of 4 borings at comers plus intermediate borings at interior foundations <br /> area sufficient to define subsoil profile. <br /> S sti~bility, deep carts, high Provide 3 to 5 borings on Gne in the critical direction to provide geological section <br /> nkments for analysis. Number of geological sections depends on extent of stability problem. <br /> For alive slide, place at least one boring up slope of sliding area. <br /> j <br /> Page 1 oj~ <br /> <br />