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<br />1.0 <br /> <br />INTRODUCTION <br /> <br />At the request of Mr. Stephen Jenkins, Director of Environment <br />and Engineering for the City of San Marcos, McCulley, Frick and <br />Gilman, Inc. has prepared this Work Plan and Cost Estimate for <br />installation and development of three additional monitoring <br />wells at the City's inactive landfill located at the Gary Job <br />Corps Center, and conducting semiannual ground-water monitoring <br />activities for the landfill during 1990. <br /> <br />The rationale for the new monitoring well locations was <br />presented in our December 1989 Ground-Water Assessment Report, <br />as follows: <br /> <br />Two additional monitcring wells should be installed upgradient <br />of the landfill property. These wells are considered necessary <br />for several reasons: 1) the one upgradient well, MW-101, is <br />dry; 2) potentiometric contours have identified two upgradient <br />areas, one to the northeast and one to the north of the <br />property; 3) examination of historic aerial photographs have <br />indicated that disposal areas other than the City of San Marcos <br />Landfill may have been in operation in the upgradient areas; <br />and 4) further definition of the extent of saturated conditions <br />in the terrace gravel deposit is warranted. <br /> <br />One additional monitoring well should be installed downgradient <br />of the western portion of the landfill property to monitor <br />ground-water conditions in this area and further define the <br />extent of the saturated terrace gravel. <br /> <br />Our Work Plan to accomplish these objectives is comprised of the <br />following tasks: <br /> <br />Task 1 - Well Installation and Development <br /> <br />Task 2 - Ground-Water Sampling and Analysis <br /> <br />1 <br />