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� <br /> � Mr. Charles Thompson <br /> " Project BL-04-05907 <br /> � October 27,2004 <br /> � Page 4 <br /> i <br /> � <br /> C. Analyses and Recommendations <br /> � <br /> � C.1. Proposed Construction <br /> The proposed building construction will consist of a multiple-story,wood-framed apartment building. <br /> S Undergfound parking will likely be built under the structure. Structural building loads for this type of <br /> ',i construction are typically relatively light, with strip footing loads of about 5 to 7 kips per lineal foot and <br /> ,S column loads of 150 kips or less. (One kip= 1,000 pounds). <br /> � At this time, we do not have building elevation information for the first floor or below-grade parking slab <br /> � elevation. However,based on site elevations,we anticipate the lowest garage slab elevation may be on <br /> the order of 955 to 960 feet. <br /> � <br /> � . Since the above information is preliminary in nature, we recommend that when final building loads and <br /> elevations are determined that we be contacted to review the following recommendations for site <br /> � preparation to determine if they are still applicable. If elevations and/or loads change substantially from <br /> � . our above assumptions, it may be necessary to prepare additional site grading and foundation <br /> recommendations. <br /> � <br /> S C.2. Discussion <br /> . Based on the soil borings,it appears that the eastern portion of the site was built as a fill embankment <br /> over organic soils for the construction of Highway 12. Substantial deposits of fill soils were placed over <br /> � the organic soils to create the entrance roadway to the site from the southeast. Based on soil boring ST-4, <br /> � it appears the situation of fill soils over organic soils does encroach into the proposed eastern portion of <br /> the building pad. This would require substantial depths of excavation to remove the organic soils and <br /> � underlying soft, sandy silt soils. It would be prudent to explore the possibility of moving this portion of <br /> S the building pad to the west to avoid large volumes of excavation and refilling. The central and eastern <br /> portions of the proposed building pad will require substantially less soil correction depths and refilling. <br /> � <br /> s At parking and drive areas in the eastern portion of the site,the existing fill soils and underlying organic <br /> soils have been in place for some time, and the organic soils appear to have been somewhat consolidated. <br /> � If the owner can accept the risk of some long-term subsidence in this area,one could consider leaving the <br /> � existing fill soils in place over the organic soils. With this approach,roadway surfaces could subside <br /> slowly over long periods of time. The alternative to leaving the soils in place would be to perform <br /> � excavations on the order of up 23 feet below existing grades to remove the underlying organic soils and <br /> i replace them with properly compacted engineered fill soils. <br /> � <br /> i <br />