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r. <br /> Mr. Alan Aramaki <br /> Page three <br /> February 13, 1981 <br /> C <br /> ' The native soil is relatively impervious and highly moisture sensitive. <br /> In practical terms, this means thai: 1) it is imperative that well <br /> designed and constructed footing drains be installed at least one foot <br /> C ver:ically below all floor slabs; and that 2) the stripped surface <br /> should not be subjected to furtfier excavation or to construction <br /> traffic during conditions of wet weather �r hi9h soil moisture; care- <br /> � �essness in this regard could result in severe softening, wasting of <br /> soil , and replacement or lowering of grade. The floor slab should be <br /> i underlain by at least six inches of coarse sand or pea gravel to facili- <br /> : C �a�e fine gradina and to minimize floor moisture. <br /> If you or other recipients of this letter have any questions, please <br /> feel free to contact me. Also, pleaselet me knovi a couple of days <br /> ahead for any scheduled ccnstruction inspections. <br /> � Yours very truly, <br /> EARTH SCIENCES ��7 <br /> _ � �: <br /> `' r/�`:�-,--�.� <br /> � J�mes N. Eaton <br /> JNE/jed � <br /> : 81-0206 � <br /> 3 copies submitted <br /> . � <br /> a� • H 1- <br /> y .-. <br /> i � • <br /> �� � ' ' '1 : � � <br /> �� ' � . - : � � <br /> � . � , <br /> � �t. -.- � .::i � � y c <br /> ,� S, �-, ��'� � � C <br /> � ' \.._.�- <br /> 1 a. . . � . <br /> : // C : <br /> l 7 <br /> r � <br /> H Y <br /> � <br /> � �" <br /> . Q � <br /> C � � : <br /> ll . <br /> C . . <br /> C . <br /> i � <br /> � <br /> 1 ` . <br /> l <br /> )S _....... .. . ..�....-� .-_ <br /> .. . ...... ....__ . . , - . <br /> _ . �..._....��.........- ...: . _ <br />