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Y <br /> 'a" <br /> AuguSt 25, 1988 Harding Lawson Associates <br /> 17060,008.03 <br /> Mr, Hal Miller <br /> The-Southland Company <br /> Page 2 <br /> As described in our proposal, Tasks 3 and 4 involve drilling <br /> and installing borings and monitoring wells, Making samples <br /> of sail and ground water, and performing, chemical analyses <br /> to confirm previous findings regarding the soil-gas survey. <br /> TASK 3 - INSTALLATION OF SHALLOW BORINGS AND MONITORING <br /> WELLS <br /> On July 14 and 15; 1988, seven monitoring wells (Mw-9 <br /> y through 15) and one soil boring (P-8) were installed on the. site .and in the ;immediate vicinity; see Plate 1 for drilling ' <br /> locations: Soil samples were collected from all wells and <br /> sm, �; borings; water samples were collected from eight existing � <br /> wells (MW-1 through 8) , and the seven new.ones. <br /> Table A summarizes construction details .for MW-9 through 15 <br /> and P-8. Detailed. lithologic logs and well completion dia- .. i <br /> grams will. be included in HLAIs final report for the Phase <br /> IV investigation. The shallow subsurface: stratigraphy noted <br /> during this investigation is similar to that noted in <br /> previdus investigations. The su}asurface conditions in the <br /> upper 20 feet are characterized by fine-grained silts, silty <br /> } <br /> clays and clayey soils underlain by silty/clayey sands. ? <br /> IF <br /> s <br /> F <br />