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C] <br />File No. 24-2206-01.A06 <br />January 2, 1991 <br />REPORT <br />GEOTECHNICAL INVESTIGATION <br />PROPOSED FOOTHILL LANDFILL EXPANSION <br />SAN JOAOUIN COUNTY, CALIrORNLIA <br />KLEINFELDER <br />INTRODUCTION <br />In this report are presented the <br />results of <br />an initial <br />geotechnical <br />investigation performed for the <br />design of <br />Phase <br />I of the Foothill <br />Sanitary Landfill located on Waverly <br />Road <br />south <br />of Shelton Road in <br />San Joaquin County, California. <br />A plot <br />plan <br />and vicinity map <br />showing the approximate location <br />of the proposed <br />area are presented <br />on Plate A-1. <br />C7 <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 />