Pa. DEP Operator eLearning Center

An anoxic process that occurs when nitrite or nitrate ions are reduced to nitrogen gas and nitrogen bubbles are formed as a result of this process.

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

DBT - Design Basis Threat

Description of a specific adversary and mode of attack that has a degree of likelihood of occurring.

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

1. DBPs - Disinfection Byproducts
   • (DBP01) DBP Rule – Overview (1282)
   • (DBP02) DBP Rule Monitoring and Reporting – Job Aids (1283)
   • (DBP10) DBP Rule Monitoring and Reporting for Chlorine⁄Chloramines (1284)
   • (DBP13) DBP Rule Monitoring and Reporting for TTHM⁄HAA5 (1285)
   • (DBP14) DBP Rule Violations for Pa. PWSs using Chorine⁄Chloramines (1825)
   • (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
   • (DBP20) DBP Rule Monitoring and Reporting for PWSs Using Chlorine Dioxide (1278)
   • (DBP30) DBP Rule Monitoring and Reporting Requirements for PWSs Using Ozone (1279)
   • (DBP40) Enhanced Coagulation – Basics (1280)
   • (LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)
   • (PNR01) Public Notification – An Introduction for NCWSs (2332)
2. Compounds, such as HAA5's and TTHM's that form when disinfectants encounter certain organic substances present in raw water. Long term exposure to some disinfectant by-products has been linked to cancer.
   • (DBP43) Jar Testing for Process Control of Conventional Filtration: Part 1 (2019)

DBP Rule - Disinfectants and Disinfection Byproducts Rule

• (DBP01) DBP Rule – Overview (1282)
• (DBP02) DBP Rule Monitoring and Reporting – Job Aids (1283)
• (DBP10) DBP Rule Monitoring and Reporting for Chlorine⁄Chloramines (1284)
• (DBP13) DBP Rule Monitoring and Reporting for TTHM⁄HAA5 (1285)
• (DBP14) DBP Rule Violations for Pa. PWSs using Chorine⁄Chloramines (1825)
• (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
• (DBP41) Enhanced Coagulation – TOC Monitoring (1281)
• (PNR11) Public Notification – Violations and Tiers for NCWSs (2333)

Representative sites within the distribution system.

• (LCR13) LCR Planning Tools for NTNCWS (2537)

Sample collected from the distribution system.

• (DBP02) DBP Rule Monitoring and Reporting – Job Aids (1283)
• (DBP10) DBP Rule Monitoring and Reporting for Chlorine⁄Chloramines (1284)
• (DBP13) DBP Rule Monitoring and Reporting for TTHM⁄HAA5 (1285)
• (DBP14) DBP Rule Violations for Pa. PWSs using Chorine⁄Chloramines (1825)
• (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)

CWS - Community Water System

1. Community Water System (CWS)
   • (DBP01) DBP Rule – Overview (1282)
   • (DBP02) DBP Rule Monitoring and Reporting – Job Aids (1283)
   • (DBP10) DBP Rule Monitoring and Reporting for Chlorine⁄Chloramines (1284)
   • (DBP13) DBP Rule Monitoring and Reporting for TTHM⁄HAA5 (1285)
   • (DBP30) DBP Rule Monitoring and Reporting Requirements for PWSs Using Ozone (1279)
   • (LCR12) LCR Planning Tools for CWS (2536)
2. A public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents.
   • (CCR01)Consumer Confidence Report (CCR) Overview (2338)
   • (DBP14) DBP Rule Violations for Pa. PWSs using Chorine⁄Chloramines (1825)
   • (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
   • (LCR10) Lead and Copper Rule — Basics (1423)
   • (LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)
   • (RAD01) Radionuclide Rule – Initial Monitoring and Reporting (1503)

CCT - Corrosion Control Treatment

Water treatment that minimizes the lead and copper concentrations at users' taps while ensuring that the treatment does not cause the system to violate any primary maximum contaminant level.

• (LCR10) Lead and Copper Rule – Basics (1423)
  (LCR11) LCR – Initial Planning, Monitoring and Reporting (1488)

CCR -Consumer Confidence Report

An annual water quality report that community water systems deliver to their customers.

• (CCR01)Consumer Confidence Report (CCR) Overview (2338)
• (PNR03) Public Notification – Delivery for CWSs [2326]

cBOD (Carbonaceous BOD)

The stage of decomposition that occurs in biological treatment processes when aerobic bacteria, using DO, change carbon compounds to carbon dioxide; cBOD is sometimes referred to as "first-stage BOD" because the microorganisms attack organic or carbon compounds first. (Nitrogen compounds are targeted second, sometimes referred to as nBOD or "second stage BOD.")

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
• (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)