a) High level radioactive wastes are stored in deep underground storage.
b) Hazardous waste liquids are soaked into non porous materials.

Explanation

### Step-by-Step Solution:

1. **Analyze the First Statement**:
- The first statement is about high-level radioactive waste being stored in deep underground storage. This is a common practice in waste management for radioactive materials. High-level radioactive waste is indeed stored in deep geological formations to ensure safety and prevent exposure to living organisms.

2. **Evaluate the Second Statement**:
- The second statement claims that hazardous waste liquids are soaked into non-porous materials. This is incorrect. Hazardous waste liquids are typically not soaked into non-porous materials because non-porous materials do not allow liquids to pass through. Instead, these hazardous liquids are usually pumped into deep wells or disposed of in a way that ensures they do not contaminate the surrounding environment.

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