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"Cleaning your septic tank might be an unwelcome chore, but doing so can help you avoid having problems with your immediate home environment. Take this quiz and learn how to make your life easier when the time comes."^^<http://www.w3.org/2001/XMLSchema#string>
<http://home.howstuffworks.com/home-improvement/plumbing/septic-tank-cleaning-quiz16.htm>