Course Glossary

This shows the specialized terms used in EarthWise Academy. This section contains all the definitions used in the various course glossaries used by each course.

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DRINKING WATER

90th Percentile Tap Sample Result

Identification of the 90th percentile tap sample result is accomplished by following two steps:

Rank all tap sample results from lowest to highest.
Multiply the total number of samples by 0.9.

(LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)

ACC

ACC - Alternative Compliance Criteria Alternative criteria that can be used to achieve either monthly or annual compliance with the enhanced coagulation requirements of the DBP Rule.

(DBP42) Enhanced Coagulation – Advanced Concepts & Alternative Compliance Criteria

Acidic

A condition in which a substance yields H+ ions when it dissociates in water, resulting in a lowering of pH.

(DBP40) Enhanced Coagulation – Basics (1280)<\ul><\li>

Action Level

Action Level (AL)
- (LCR10) Lead and Copper Rule – Basics (1423)
- (LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)
A level at which the system must take additional action to reduce lead or copper levels and inform consumers about the actions they can take to lower exposure to lead in drinking water.
- (CCR01)Consumer Confidence Report (CCR) Overview (2338)

Activated Silica

A coagulant aid that is created on-site by neutralizing sodium silicate.

(COA02) Coagulation — Part 2: Coagulation Chemicals (1249) <\ul><\li>

Acute health effects

Adverse effect on human health as a result of short-term exposure. Acute health effects occur within hours or days of the time that a person consumes a contaminant.

(DBP14) DBP Rule Violations for Pa. PWSs using Chorine⁄Chloramines (1825) <\li>
(PNR01) Public Notification – An Introduction for NCWSs (2332) <\li>
(PNR11) Public Notification – Violations and Tiers for NCWSs (2333)(1488) <\li> <\ul>

Adsorb

The accumulation of one material on the surface of another material through physical bonds

(COA01) Coagulation – Part 1: The Chemistry of Coagulation (1248)
(DBP43) Jar Testing for Process Control of Conventional Filtration: Part 1 (2019)

Adsorption

The gathering of a gas, liquid, or dissolved substance at the surface at the surface of solid bodies with which they are in contact.

(DBP40) Enhanced Coagulation – Basics (1280)

AL

AL - Action Level
- (LCR10) Lead and Copper Rule – Basics (1423)
- (LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)
A level at which the system must take additional action to reduce lead or copper levels and inform consumers about the actions they can take to lower exposure to lead in drinking water.
- (CCR01)Consumer Confidence Report (CCR) Overview (2338)

Alkaline

(DBP40) Enhanced Coagulation – Basics (1280)