Looking southeast. Back of west wall of built shaft and wall at west of built shaft on top of it ... AMS Horizontal (normal) ... Back of west wall of builtshaft and wall at west of builtshaft on top of it.
Looking east. At left, southwest corner of tank, outside of east wall of built shaft ... AMS Horizontal (normal) ... At left, southwest corner of tank, outside of east wall of builtshaft.