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Wainui: Girovci €;ewer Prajeci: 15oo:�C<-�r huuga Si<aEinn Vrcie ;s Our Project: Numhar: LFf-D1F:l. lay 14, 2007 shallow test hole was drilled with a truck mounted Mobile B53 drill rig, utilizing 6 -inch continuous flight auger. The deeper boring was drilled with a truck mounted Mobile B53 drill rig utilizing the mud rotary drilling method. The locations of the test holes are shown on the Location Map, Plate No. 1. The locations of the test holes were determined by pacing from existing site features; hence, accuracy can be implied only tD the degree that this method warrants. Sampling of the drilled test holes was performed at various depths using a California Modified 2.5 inch o.d. split spoon sampler with stainless steel tube liners or an unlined Standard Penetration Sampler. The samplers were driven by a 140 pound hammer with a 30 -inch drop. Blow counts required to drive the samplers every 6 inches for a total of 18 inches were recorded. The blow counts for the drilled test holes were corrected from an energy efficiency of approximately 45 percent to a standard cat head efficiency of approximately 60 percent. Soil samples obtained from the test Doles were preserved in stainless steel tubes or sealed plastic bags until the samples could be tested in the laboratory. Samples were taken to the laboratory of Neil O. Anderson & Associates, Inc., Lodi, California and used for performing various laboratory tests. Tests performed consisted of unit weights, moisture contents, unconfined compressive strength, Atterberg Limits, and gradation analysis. A summary of the test results are presented on the Log of Boring sheets, Plates 2 and 3. Visual classification of each soil stratum encountered according to ASTM D2488 (Visual — Manual Procedure) was made in the field by a representative from our office at the time the test holes were drilled. The samples obtained were checked in the laboratory by a geotechnical engineer and classification verified according to ASM D2487. A classification and graphical representation of each soil encountered is presented on the Log of Boring sheets. The test boring legend is presented on Plate No. 4. The soils encountered during .our field investigation were fairly uniform between test holes. The upper soils consisted of silty sand that extended to depths of between 2�/z and 5 feet below the existing ground surface. The soils encountered below the surface soils consisted of stiff to hard sandy and silty clay that extended to depths of between 10 and 19 feet below the existing ground surface. In boring B1, the clay was underlain by mediuim stiff to stiff sandy silt, In boring B2, the clay was underlain by medium dense sand that extended to the maximum depth explored. For a more detailed description of the soils encountered in the test holes see the Logs of Boring sheets. NEIL O. .ANDERSON AND ASSOCIATES 702/nrdix0 ial 1('ay• l.adi, e'A 95210 )2007 Nett 0. Anderson & Associctes. nc.