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English Instructor Manual (PDF) - Metric Version - National ...

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Chapter 2 – Water Quality<br />

Handbook: Pages 17-32<br />

Suggested Time:<br />

PowerPoint Slides:<br />

Materials:<br />

40 minutes<br />

APF Chapter 2 Slides<br />

Water Chemistry Guidelines<br />

(Appendix 1 from Aquatic Play Feature Handbook)<br />

Fecal Accident Response Recommendations<br />

(Appendix 6 from Aquatic Play Feature Handbook)<br />

Objectives: At the end of this chapter the student will be able to:<br />

1. Explain the water quality problems that make an aquatic play feature (APF) different<br />

from a traditional swimming pool<br />

2. Explain the importance of maintaining proper water levels in all APFs<br />

3. Explain how chemicals are added to APFs<br />

4. Explain why automatic chemical control systems are preferred in APFs<br />

5. List the recreational water illnesses that can be associated with APFs<br />

6. Compare the turnover rate associated with the various APF pools<br />

7. Explain the air quality issues associated with indoor APFs<br />

8. Explain why chemical exposure accidents are more of a problem with APFs<br />

9. List the alternative chemical treatment methods that can be utilized with APFs<br />

Leading Questions:<br />

What makes chemical dosing a problem with APFs?<br />

Why are water level and disinfection level harder to maintain in APFs?<br />

What factors contribute to rapidly changing APF water?<br />

Key Points: APF makeup water (p 18). Include information relative to:<br />

How water is lost in an APF<br />

Splash out<br />

Carry out<br />

Evaporation<br />

How the composition of potable makeup water might infl uence water balance<br />

pH<br />

Alkalinity<br />

Calcium Hardness<br />

Chloramine concentration in makeup water<br />

Pretreatment of makeup water<br />

Key Points: Proper water levels in APF (pp 18-19). Include information relative to:<br />

Cause of water loss in APFs<br />

Areas of greatest water loss<br />

Dangers of low water levels in speed slides<br />

© 2014 <strong>National</strong> Swimming Pool Foundation® Page 113

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