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6 <br />a <br />Harmon 8 Associates W-4545 , <br />15 April 1985 Page 4 <br />At the time of orr exploration� heavy ground water seepage was observed in the <br />peat horizon found in te.st pits TP-1. TP-2 a��d TP-3. This ground water is at <br />approximately the same elevation as the standing water in the wetlands region to <br />the south of the p:�operty. Seepage was also observed at the 8 to 9 foot depth in <br />test pit TP-5. Ground water levels may flu�tuate due to variations in rainfall, <br />temperature. season. site utilization or other factors. <br />5.0 CONCLUSIONS AND RECOMMENDATIONS " � <br />plthough design plans are still in preliminary stages. we have been informed that <br />the proposed development will consist of two multi-story office buildings. If <br />the southwest building is located as shown on the site map supplied by <br />James Bakke. Inc: A dri3led pier or pile foundation design w+�uld probably be most <br />appropriate. Further field study with a larger backhoe or drtlliny would be <br />necessary before designiny a deep foundation. Discussions with Ron Gregory from <br />Harmon Associates, however, indicate they would be willing to move the building <br />north ta facilitate �he use of shali-ow spread footings. Based on our exploration <br />pfogram, and assuming the southeast building is moved north, the site appears <br />suitable for proposed development utilizing shallow spread footinys �aring upon <br />glacially consolidated soils. <br />Our recommendations concerning earthwork are limited by the lack of building <br />elevation information. It appears, however. that some removai of uncontrolled <br />fill and placement of °structural fill` may be necessary. Most of the soil on <br />the site can be considered moisture-sensitive �1ich would make site preparation <br />and grading oPerations dif�icult or impossibie during wet weather. -.. <br />5.1 Site Preparation ' <br />ln preparation for building, all surficial organic-rich material. including <br />veyetation and topsoils. should De removed from both building and pavement areas. <br />Ideaily, any existing fill. as well as any organic-rich soils beneath the fill. <br />shoujd be removed from the building a�d pavement area. Only a feM feei of <br />material should need to be removed from most of the site. However. greater than <br />10 feet of fill and peat may need to be removed from this area south of the <br />