1600 121ST ST SE 2016-01-01 MF Import

� October 28 1987 7 873_1317 contractor should implement prctective measures. Thr.se measures sfiou?d include, but not be limited to, the placenent of either a thin layer of pea gravel, crushed rock, or a lean concrete mud mat over the prepared and ' approved subgrade. If ear[hworks can be completed during the anticipated period of lower . groundwater in the drier sumner months of the year, ae rer.ommend the F•,11 a�d Peat and any other soft or disturbed soils encouitered be removed am! replaced with an onsite or imported, caarse grained, free draining granular c�mpacted fill. The excavations made in the removal and replacement process snould extend outside the footing line a dlstance equal to tlie depth of the excavation. If insufficient ansite fill is available, we recommend a clean free draining sand and gravel imported fill material with less than five percent passing t,he No. 200 sieve, based on the minus 3/4-inch fraction be used. This type of material can typically be placed and compacted in wet weather conditions. The fill should be placed in maximum eight-inch loose lifts and compacted to at least 95 percent of the ASTM D 1557 78 laboratory standard. We recommend a large steel wheeled vibratory roller be used to compact the fill. If density tests taken in the fill indicate compaction is not be being achieved, the fill should be scarified, moisture conditioned, and recompacted. 7. Rp�INAGE CONTROL MEASURES Due to the moisture sensitivity of the site soils, we recommend both short- and long-term drainage measures be incorporated into the project design and construction. Surface runoff can be control�ied during canstruction by careful excavation practices. Typically, these include the construction af shallow upgrade perimeter drainage ditches or low earthen berms and the use of temporary sumps to collect seepage and prevent water from damaging exposed subgrades. All collected Nater should be directed under control to a positive and permanent discharge system such as the storm sewar. 8. USE OF THIS REPORT ' This report has been prepared exclusively for the use of The Axelrod Company and their consultants for the specific application to this project. Once the proposed site development plans are finalized, we should be contacted to review aur conclusions and recomnendations. The exploration has been performed in general accordance with locally accepted geotechnical e�gineering practice to provide information for the area explored. There are possible variations in the subsurface conditions between the explorations and in the groundwater conditions with time. We recommend a cantingency for unanticipated conditions be included in the construction schedule and budget. Further, we recommend that we be retained to perform Golder Associates