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r <br /> Spiess Rancho Subdivision <br /> Page No. 2 <br /> r <br /> III FIELD EXPLORATION AND LABORATORY TESTING j <br /> The field investigation conducted at this site consisted of <br /> excavating 5 exploratory test pits carried to depths of 4.0 to 6.5 <br /> feet and drilling 7 exploratory test holes to a depth of 10 feet. <br /> The test pits were excavated with a Case 580E backhoe equipped with <br /> a 24 inch bucket and the test holes were drilled with a truck <br /> mounted Deep Rock drill rig, utilizing 4.5 inch continuous flight <br /> auger. The location of the test pits and test holes is shown on <br /> the location map, Plate No. 1. The location of the test pits and <br /> holes was determined by pacing hence accuracy can be implied only <br /> to the degree that this method warrants. <br /> Sampling of the test holes was performed at various depths by <br /> a California Modified 2. 5 inch o.d. split spoon sampler with <br /> stainless steel tube liners. The sampler was driven by a 140 pound <br /> hammer with a 30 inch drop. Blow counts required to drive the <br /> sampler every 6 inches were recorded and this information is <br /> presented on the Log of Boring sheets, Plates No. 2 through 5. Log <br /> of test pits is presented on Plates No. 6 through 8. <br /> Relatively undisturbed soil samples obtained from the test <br /> holes were preserved in stainless steel tubes until the samples <br /> could be tested in the laboratory. Select grab samples were taken <br /> from the sides of the test pits. Samples were taken to the <br /> laboratory of Neil O. Anderson & Associates, Inc. , Lodi, California <br /> and used for performing various laboratory tests. Tests performed <br /> consisted of unit weights, moisture contents, and atterberg limits. <br /> A summary of the test results is presented on the soils logs. <br /> Previously, three sack samples were obtained of the near <br /> surface soil along the proposed street alignments. Samples were <br /> obtained from the 12 to 18 inch depth. For approximate location of <br /> the samples see the Location Map. R-value tests were performed on <br /> each of the samples. Results of the tests were presented in a <br /> letter dated March 9, 1995 . R-values test 1, 2, and 3 had R-value <br /> of 10, 22, and 14 respectively. <br /> IV SOIL CONDITIONS <br /> r Visual classification according to ASTM D2488 (Visual - Manual <br /> Procedure) of each soil stratum encountered was made in the field <br /> by an engineer at the time the test pits and test holes were <br /> excavated. The samples obtained were checked in the laboratory and <br /> classification verified according to ASTM D2487. A classification <br /> and graphical representation of each soil encountered is presented <br /> � P OERSO1 <br /> ` i N <br /> Z W <br /> P <br /> °ssoc� <br /> r <br />