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1"1/1y/1bb:~ '15:14 541I4b/16:~ F'St t'F~(aE 04 <br />P31't'Foposal No, 722-03-117 <br />Proposed Retaining Wall along Garden way <br />Eugens, Oregon <br />November 17, 2003 <br />Page 3 <br />as determined by AS'CM method 02487, Standard Practice for Classification of Soils for <br />Engineering Purposes. The relatively undisturbed samples may be tested for consolidation <br />and/or swell characteristics. Based on the soil types and the subsurface Conditions encountered, <br />additional testing may be performed. PSI will locate the test pits in the Feld by measuring <br />distances from existing site landmarks. <br />We understand that you have already contacted Locating, tnc, to mark utility locations prior to any <br />subsurface exploration. PSI will not be responsible far damage caused to unmarked or un- <br />locatable private utilities during the site subsurface investigation. <br />We will perform an engineering evaluation using the information available regarding the proposed <br />construction, and the information obtained from our observation, field exploration, and laboratory <br />testing. We will submit copies of our report, which will address and/or discuss the following items: <br />• Support of the proposed Retaining Wall, including allowable soil bearing pressures <br />including lateral loads, anticipated bearing depths, and estimated total and differential <br />static settlements, <br />Fill considerations, including recommended fill material characteristics and compaction <br />''` requirements for general site fill and backfill, including an assessment as to the stability <br />of on-site soils for use as fill. <br />• Coefficient of Uniformity for the existing material located behind the wall. <br />• Unit Weight of the existing material located behind the wall. <br />• Site work recommendations including any undercutting or other special site preparation <br />needs and recommendations for corrective m@asures of unsuitable soil conditions, <br />including expansive soils, if determined to be present. <br />• Site water management considerations including groundwater, drainage, wa#erproofing <br />and site de-watering if applicable, <br />SCHEDULE <br />Once we receive authorization to proceed, we anticipate that the fieldwork can be Conducted on <br />Monday November 24, 2003 as scheduled. We anticipate tha# the fieldwork will take 1 day and <br />that the laboratory work will take 1 week. Our report will be submitted within 3 weeks of <br />completion of field work. However, if the project requires a more accelerated schedule, please let <br />us know and we will try to accommodate your needs. <br />