Chapter 1: Trench boxes 🔒

Phrase 1: trench box

Phrase 2: trench box installation

Phrase 3: inspect the trench box installation

Chapter 2: Benching 🔒

Phrase 1: benching

Phrase 2: soil benching

Phrase 3: soil benching stability

Chapter 3: Entry and Exit 🔒

Phrase 1: 25

Phrase 2: 25 feet

Phrase 3: exit every 25 feet

Bonus Chapter: Soil Type 🔒

Phrase 1: type a

Phrase 2: type a soil

Phrase 3: is it type a soil?