The sand does not impede Samus in G-Mode. It is possible to jump to the tall pillar with nothing, requiring a subpixel precise jump. Running before jumping doesn't help. Stand one pixel from the right edge and spinjump to the right.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": false
  },
  "comesThroughToilet": "any"
}

Requires:

"h_canNavigateUnderwater"
{
  "or": [
    "Gravity",
    "HiJump",
    "canSpringBallJumpMidAir",
    "canTrickyJump"
  ]
}