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File No. 24-2206-01.A06 ` KLEINFELDER <br /> January 2 , 1991 <br /> REPORT <br /> GEOTECHNICAL INVESTIGATION <br /> PROPOSED FOOTHILL LANDFILL EXPANSION <br /> S;L-T JOAQUIN COUNTY, CALI:ORNIA <br /> INTRODUCTION <br /> In this report are presented the results of an initial geotachni cal <br /> investigation performed for the design of Phase I of the Foothill <br /> Sanitary Landfill located'on Waverly Road south of Shelton Road in <br /> San Joaquin County, California. A plot plan andvicinity map <br /> showing the approximate location o= the proposed area are presented <br /> on Plate A-1. <br /> The County intends to design the next landfill unit in the <br /> currently active Phase I area. The next landfill unit is proposed <br /> to have a liner which is required to have a coefficient of <br /> permeability of less than 1 x 10-6 cm/sec to comply with Title 23 , <br /> Chapter 15, or an engineered alternative approved by the Regional <br /> Water Quality Control Board (RWQCB) . <br /> PURPOSE AND SCOPE OF INVESTIGATION <br /> The purpose of our geotechnical investigation has been to explore <br /> and evaluate the surface and underlying soils within the <br /> undisturbed areas of Phase I and to assess soils for a low <br /> permeability "clay" liner. Our services also included providing <br /> data to aid in selection of a liner design for the next landfill <br /> unit. The scope of our services was approved by the County under <br /> an "Agreement for Consulting Engineering Services, " dated September <br /> Copyright 1991 KLeinfelder, Inc. 1 <br />