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GROUND VIBM1RATION DATA, AMPLITUDE 2.0 in/s: <br />A nr ~ II fl <br />Surface, vertical <br />Surface, radial <br />PIPELINE STRAIN DATA, AMPLITUDE 50 µs: I <br />n <br />8-inch PVC, Top longitudinal <br />6-inch, Front longitudinal <br />6-inch, Top circurferential <br />6-inch, Top longitudina{ <br />12-inch, Top longitudinal <br />20-inch, Top circumferential <br />20-inch, 1'op longitudinal <br />0.0 0.5 1.0 1.5 2.0 <br />TIME, sec <br /> <br />Figure 4.- Vibrations and strain time Histories for blast No. 25 • <br />145 <br />