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Hart Crowser ; <br /> J-3446-01 <br /> Penetra.tion Test (SP'1� and thin-walled Shelby tube.;, we obtained <br /> samples at 2�/z- to S-foot-depth intervals. <br /> i <br /> The boru�gs logs are presented on fiignres A-2 through A-6 at the end I <br /> of !his appendix. Figures A-7 and A-3 are boring logs HC-MW-1 and � <br /> HC-IvIW-4, respectively, from the J-344G-Ol report. <br /> Sta�ulard Penetration Test (SP77 Procedums <br /> This test is an approximate measure of soil d nsiry and consistency. To <br /> be useful, the resulu must be used with engineering jud�nent in <br /> conjunction with other tesu. The SPT (as descnbed in ASTi�f D 153'� <br /> was used to obtain disturbed samples. This test employs a standard 2- <br /> inch outside diameter split-spoon sampler. Using a 140-pound hammer, <br /> free-falling 30 inches, the sampler is driven into the soII for 18 inches. <br /> The numbe:r of blows required to drive the sampler the last 12 inches <br /> �,nly is the Standard Yenetration Resistance. This resistance, or hlow <br /> count, measures the relative density of granular so�s and the consistency <br /> of cohesive soils. The blow counu are plotted on the boring ]ogs at <br /> their respective sample depths. <br /> � <br /> So�1 samples are recovered from the split-barrei sampler, field c]assified, <br /> and placed into water tight jars. They are then taken to Hart Crowser's � <br /> laboratory for further testing. � <br /> In tl�e F.vertl of Hnrd Drivin� <br /> ' Occasionally very dense materials preclude driving the total i&inch <br /> sample. When this happens, the penetration resistance is entered on <br /> lags as follows: <br /> � <br /> Penetrarion I,ess Than Sic Inchcs. T'he ]og indicates the total number ; <br /> of blows over the number of inches of penecration. <br /> if <br /> Peuetration Greater Than Siz Inches. The blow count noted on the '.og f <br /> is the sum of the total number of blows completed after the first snc � <br /> inches of penetration. This sum is expressed over the number of inches � <br /> driven that exceed the first 6 inches. The number af blows needed to <br /> drive the first six inches are not reperted. For example, a blow count <br /> s�ries of 12 blows for 6 inches, 30 blows for 6 inches, and 50 (the <br /> Page A-2 <br /> ���, <br />