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Extracted text: 1. DIFFERENTI AL LEVELING. Complete the below and perform differential level notes shown the customary arithmetic check. STA BS HI FS ELEVATION BM 10 2.085 137.450 m TPI 2.015 0.982 TP2 1.864 1.428 TP3 0.579 1.527 BMII 0.423 2.423 TP 4 1.446 1.807 ТР5 1.778 1.725 TP6 2.05I 2.339 TP7 2'.920 1.005 BM 12 3.186 2.358 TP8 2.805 0.995 TP9 0.774 1.206 BM 13 0.603