1011 39TH ST 2016-01-01 MF Import

GEOTECHNICAL ENGINEFFiING STUDY Susan and Thomas Zakos E-10138 August 20, 2002 Page 4 A schematic cross-section o( existin� slope condi:ions is included as Plate 3, Cross-Section A-A' of our report. The profile is based on topographic data shown on a site plan prepared prior to construction of tlie existing residence and retaining wall. Tlie existing topograpliy reflectiny the fill areas and native conta�ts shown on d�e cross-section :vere approximated. Groundwater Light to moderate groundwaler seepage was encountered at our boring locations at depths ranginc� from approximately eight (8) tc twenty (20) feet below rrade at three of our four boring locations. In addition, zones c( iron oxide staining, mottling, and increasPd soil moisture were encountered at widely varying depths to the maximum depth explored. The observed groundwater seepage, mottling, iron oxide staining, and increased soil moisture are likely occurring within lenses ot relatively permeable sand within surrounding dense to v�ry dense, low-pt rn�eabil ly soils. The groundwater level is not static; tlius, one may expect iluctuations in the level depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the water level is higher and seepage rate is �reater in the �vetter winter months (typically October through Mayl. LaboratorY Testinc� Laboratory tests were conducted on rzpresentative soil samples to verify or modify the (ield soil dassification and to evaluate the c�eneral �hysical properties and engineering characleristics of the soil encountered. Visual field classifications were supplemented by grain size analyses on r�presentative scil samples. Moisture content tests were performed on ali samples. The results of laboratory tests periorme d on specific samples are provided either at the appropriate sample depth on the individu; i boring logs or on a separate data sheel contained in Appendix B. It is important to note that th�se test results may not accurately represent the overall in-situ soil conditions, Our geotechnical recommendations are based on our interpretation of these test results and tLeir use in guiding our engineering judgment. ECI cannot be responsibie icr the interpretation of these data by others. In accordance with our Standard Fee Schedule and General Conditions, the soil samples for this project will be discarded aiter a period of fifteen days following completion of this report unless we are otherwise directed in writing. ;:,u, r.,�n;�n•„��,�;_ ��,c.