ARTICLES

Groundwater monitoring, explained

Short explanations of the rules and statistics behind landfill groundwater monitoring under RCRA Subtitle D. Every claim about a rule or a method links to the regulation or to EPA's guidance, so you can check it yourself.

• What RCRA groundwater monitoring is, and why it needs statistics

  The picture behind landfill groundwater monitoring under RCRA Subtitle D, and why a laboratory result cannot simply be compared with background. Start here.

• What "background" means in landfill groundwater monitoring

  What background groundwater is under RCRA Subtitle D, where it comes from, and why it decides whether a statistical result is right.

• What a statistically significant increase is, and what happens after one

  What an SSI is under 40 CFR Part 258, how one is determined, and what the rule requires within 14 and 90 days of finding one.

If something in these does not match your experience, we would like to hear it. Write to support@koynasystems.com.