Pa. DEP Operator eLearning Center

BOD — Biochemical Oxygen Demand

A measure of the oxygen required to break down organic materials in water using biological means. The amount of oxygen required to oxidize any organic matter present in water during a specified period of time, usually 5 days. It is an indirect measure of the amount of organic matter present in water that is used to monitor natural waters and processed effluents discharged into natural waters.

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BNR02) Nitrification Factors — Suspended Growth Treatment Systems (1821)
• (BIO10) Estimating Sludge Volume (2343)

Water is treated with an additional boost of chlorine from within the distribution system.

• (DBP20) DBP Rule Monitoring and Reporting for PWSs Using Chlorine Dioxide (1278)

A public water system that provides water for bottling in sealed bottles or other sealed containers. The term includes, but is not limited to, the sources of water and treatment, storage, bottling, manufacturing and distribution facilities. The term does not include a public water system that provides only a source of water supply for a bottled water system and excludes an entity providing only transportation, distribution or sale of bottled water in sealed bottles or other sealed containers.

• (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
• (TCR01) Total Coliform Rule – Overview (1424)
• (TCR02) Total Coliform Rule – Monitoring And Reporting Requirements (1425)
• (TCR03) Total Coliform Rule – Maintaining Compliance (1426)

Bottled, Vended, Retail, & Bulk-delivered Water Systems – (BVRB)

• (TCR01) Total Coliform Rule – Overview (1424)
• (TCR02) Total Coliform Rule – Monitoring And Reporting Requirements (1425)
• (TCR03) Total Coliform Rule – Maintaining Compliance (1426)

The ability of a solution to neutralize acids without a significant change in pH. Buffering capacity is also known as alkalinity and is measured in mg/L of equivalent CaCO3, a common buffer.

A public water system that provides water piped into a carrier vehicle and withdrawn by a similar means into the user's storage facility or vessel. The term includes, but is not limited to, the source of water, treatment, storage or distribution facilities. The term does not include a public water system that provides only a source of water supply for a bulk water hauling system.

• (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
• (TCR01) Total Coliform Rule – Overview (1424)
• (TCR02) Total Coliform Rule – Monitoring And Reporting Requirements (1425)
• (TCR03) Total Coliform Rule – Maintaining Compliance (1426)

BVRB - Bottled, Vended, Retail, & Bulk-delivered water systems

• (TCR01) Total Coliform Rule – Overview (1424)
• (TCR02) Total Coliform Rule – Monitoring And Reporting Requirements (1425)
• (TCR03) Total Coliform Rule – Maintaining Compliance (1426)

Ca(OH)₂
Calcium hydroxide – Slake lime, a white powdery substance that is difficult and unpleasant to handle. Neutralization is rapidly effected.

• (DBP40) Enhanced Coagulation – Basics (1280)

Ca(OH)₂
– Slake lime, a white powdery substance that is difficult and unpleasant to handle. Neutralization is rapidly effected.

• (DBP40) Enhanced Coagulation – Basics (1280)

A process for considering the future purchase or construction of expensive items.

• (SEC01) Securing Drinking Water and Wastewater Treatment Facilities 2954