*Question G0A08:
[97.13(c)(2)] Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?*  

*Correct Answer is  C: Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas*  

### AI Response: (may contain errors)  

To ensure compliance with RF safety regulations, the correct answer is:

**C: Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas.**

### Explanation of the Correct Answer:
- **RF Exposure Evaluation**: Amateur operators must assess the RF exposure levels around their station to ensure they do not exceed the limits set by the FCC. This involves calculating the power density and determining if any areas around the antenna could expose individuals to unsafe levels of RF radiation.
- **Prevent Access**: If high exposure areas are identified, operators must take steps to restrict access to these areas to protect the public and themselves from potential harm.

### Why the Other Choices are Incorrect:
- **A: Post a copy of FCC Part 97.13 in the station**:  
  While it's good practice to be familiar with regulations, simply posting a copy does not ensure compliance with RF safety. It does not involve any active evaluation or mitigation of RF exposure risks.

- **B: Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels**:  
  Notification is not a requirement under FCC regulations. While it may be courteous, it does not address the need for an RF exposure evaluation or the management of high exposure areas.

- **D: All these choices are correct**:  
  Since options A and B do not fulfill the requirements for RF safety compliance, this choice is incorrect.

### Useful Formulas and Rules of Thumb:
- **Power Density Calculation**: To evaluate RF exposure, you can use the formula for power density ($S$) at a distance ($d$) from a point source:
  
  $$S = \frac{P_T \times G}{4 \pi d^2}$$

  where:
  - $S$ = power density in watts per square meter (W/m²)
  - $P_T$ = transmitter power in watts
  - $G$ = gain of the antenna (linear)
  - $d$ = distance from the antenna in meters

- **General Safety Limits**: The FCC has established limits for RF exposure based on frequency and duration of exposure. Familiarize yourself with these limits to ensure compliance.

By focusing on performing RF exposure evaluations and managing access to high exposure areas, amateur operators can effectively comply with safety regulations.