1 Small Recovery around the cistern
From the broken part of the handrail around the large cistern, jump over to the crane arm and use it to reach the platform. In Route B you start the game here.
Kick down the ladder
Lower the crane arm
A control panel at the south end of the platform.
Drop down in the space between the cistern and the crane arm.
$1000 at the interior cistern door
1 Small Recovery on the upper walkway
$1000 on the main walkway
Near the landing with 6 stationary Small Stubbies.
From the landing with 6 stationary Small Stubbies, go right, under the walkway.
At the start of the bridge.
During Olive Branch (Route A) or after it (Route B).
Secret chests in the chimney
When the camera switches to side-scrolling view for the first time, you'll be on a walkway going through a large chimney. Stand in its right-side exit, and double jump up and left back inside it. You should land on a walkway a little off the ground.
Secret room above the metal press conveyor
About halfway up the stairs around the cistern after the metal press conveyor belt, there will be a platform where you can change the direction and make your way across the tops of the metal presses you ran under previously.
Unlock elevator back to access point.
In the room after riding a background conveyor belt.
The room the second metal press conveyor