Ounces and a 91.4-centimeter (36-inch) manhole for access.

(189 Im EL 57m (187 FT) — EL 18m (59 FT) EL = ELEVATION EL 80.8m (265 FT) —— EL 57.6m ZN (189 Im EL 57m (187 FT) — ELO PAD SURFACE BOTTOM OF FLAME TRENCH PA HYDROGEN Z i AN EL 50.9m (167 FT} — EL 44.8m (147 SEA 7 EL 38.7m (127 EN .