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, .Mer,-la and Associates STS Project 93492 December 19, 1984 M]a In addition to the borings performed for this study, four )orings from the previous exploratici program-, are located within this study area and are shown on the enclosed soil boring location diagram. A copy of these Soil Exploration Company boring logs are included in the Appendix of this report. Based on the information given on these logs, excava- tion to similar depths to those noted here can be expected at these locations. Excavation to depths noted here may encounter perched ground water conditions which were require dewatering of the excavation during construction. This dewatering could probably be achieved using standard sump pit and pump operations if excavations are limited to .. within 1 to 2 ft below the water level. Standing water and loosened or disturbed soil at the base of any excavation should be removed prior to placement of any fill or concrete. We recommend that an experienced soil technician from our firm be on -site during the excavation of these unsuitable soils in order to determine that suitable base materials have been reached and that soil conditions are as anticipated in, this report. We recommend that our technician make an on -site evaluation of the excavation bases prior to placement of any structural fill for footings or pavements in order to determine that soil conditions are suitable and that precautions noted in this report have been met at that time. Structural fill used.in the areas of this site which encounter excessive ground water seepage should be a select granular fill material free of debris and organics with a maximum of 10% passing the No. 200 Sieve. Fill should not be placed in standing water. Rather, the excavation should be pumped dry using a sump pit and pump to eliminate as much pooling as possible. ..