Wednesday February 17, 2021
Water Operator Continuing Education
Source Water Protection and Emerging Contaminants
On-line via ZOOM
9:00 am - 11:00 am (Chamorro Standard Time GMT + 10)
Source Water Protection and Emerging Contaminants
On-line via ZOOM
9:00 am - 11:00 am (Chamorro Standard Time GMT + 10)
AGENDA
Welcome, Introduction and About Continuing Education - Derek Chambers
Source Water Protection - Mark Nelson of Horsely Witten
Emerging Contaminants: PFAS Case Study - Bryan Massa of Horsely Witten
Instructors' Bios
Presentations
Click on the links below to download pdfs of the Power Point Presentations from this class:
Video captures of the Zoom presentation
About Continuing Education
Source Water Protection - Mark Nelson, Horsely-Witten
PFAS case study - Bryan Massa, Horsely-Witten
Questions/comments typed into the chat box during this class:
This class had a pre-test and a post-test since it was sponsored by RCAC and that is one of their grant requirements.
Person : Comment. Response
The presenter asked people to list things that might contribute to groundwater contamination. Geoffrey Melchor made a notable comment...
Geoffrey Melchor : land uses and activities that are considered stormwater hotspots listed in Table 2.1 of the CNMI Stormwater Management Manual
Thanks Geoff for mentioning teh CNMI Stormwater Manual!
Geoffrey Melchor : land uses and activities that are considered stormwater hotspots listed in Table 2.1 of the CNMI Stormwater Management Manual
Thanks Geoff for mentioning teh CNMI Stormwater Manual!
Geoffrey Cabrera : Can you mention again how many feet of fresh water under salt water? Was it for every foot of fresh water 4 feet of salt water?
this is an excerpt from Rob Carruth's USGS publication Ground-Water Resources of Saipan: Theoretical freshwater lens and actual conditions on Saipan.--The Ghyben-Herzberg principle commonly is used to relate the thickness of a freshwater lens in an ocean-island aquifer to the density difference between freshwater and saltwater. The principle states that the theoretical interface between freshwater and saltwater is at a depth below sea level that is 40 times the elevation of the water table above mean sea level (Todd, 1980). In reality, instead of a sharp freshwater-saltwater interface, freshwater is separated from saltwater by a transition zone in which salinity grades from freshwater to saltwater. In many field studies, the Ghyben-Herzberg interface depth has been found to correspond to the depth of about a 50-percent mix of freshwater and saltwater. Under equilibrium flow conditions in permeable aquifer systems, the Ghyben-Herzberg principle may provide a reasonable estimate of freshwater depth if the transition zone is thin relative to the thickness of the freshwater lens. https://pubs.usgs.gov/wri/wri034178/htdocs/wrir03-4178.html#:~:text=The%20primary%20municipal%20water%20supply,principal%20aquifers%20on%20the%20island.&text=A%20smaller%20amount%20of%20recoverable,basement%20rocks%20above%20sea%20level.
this is an excerpt from Rob Carruth's USGS publication Ground-Water Resources of Saipan: Theoretical freshwater lens and actual conditions on Saipan.--The Ghyben-Herzberg principle commonly is used to relate the thickness of a freshwater lens in an ocean-island aquifer to the density difference between freshwater and saltwater. The principle states that the theoretical interface between freshwater and saltwater is at a depth below sea level that is 40 times the elevation of the water table above mean sea level (Todd, 1980). In reality, instead of a sharp freshwater-saltwater interface, freshwater is separated from saltwater by a transition zone in which salinity grades from freshwater to saltwater. In many field studies, the Ghyben-Herzberg interface depth has been found to correspond to the depth of about a 50-percent mix of freshwater and saltwater. Under equilibrium flow conditions in permeable aquifer systems, the Ghyben-Herzberg principle may provide a reasonable estimate of freshwater depth if the transition zone is thin relative to the thickness of the freshwater lens. https://pubs.usgs.gov/wri/wri034178/htdocs/wrir03-4178.html#:~:text=The%20primary%20municipal%20water%20supply,principal%20aquifers%20on%20the%20island.&text=A%20smaller%20amount%20of%20recoverable,basement%20rocks%20above%20sea%20level.
Randy Blackcloud : Is existing usgs hydrological data sufficient to develop a source water protection area for each well?
The CNMI Groundwater and Well Drilling Regulations define Groundwater Management Zones on Saipan. These GMZs were developed using USGS maps of groups of important CUC wells that provide water drinking water for Saipan. Yes, there is probably enough data to determine where source water originates for most wells.
The CNMI Groundwater and Well Drilling Regulations define Groundwater Management Zones on Saipan. These GMZs were developed using USGS maps of groups of important CUC wells that provide water drinking water for Saipan. Yes, there is probably enough data to determine where source water originates for most wells.
Randy Blackcloud : during reactivation of GAC filter media is PFAS released into the atmosphere?
Randy Blackcloud : Or does high temperature chemically transform PFAS into benign chemicals?
Presenters did not know the specific answer to these questions, but did discuss the importance of frequently testing the incoming and outgoing concentrations of PFAS to the GAC filter because there will eventually be breakthrough.
Randy Blackcloud : Or does high temperature chemically transform PFAS into benign chemicals?
Presenters did not know the specific answer to these questions, but did discuss the importance of frequently testing the incoming and outgoing concentrations of PFAS to the GAC filter because there will eventually be breakthrough.
Barry Pollock : Barry Pollock - Rural Development Specialist - RDS - bpollock?@rcac.org, 510 -759 6984. Mahalo and si yu’us maase MIWOA and HW for great workshop / trainings!
Barry Pollock : bpollock@rcac.org
Barry Pollock : bpollock@rcac.org
Geoffrey Cabrera : Do our names show up on the quizzes?
From Barry Pollock : Geoffrey - no names - we just look at the total percentage right and wrong (the whole group) - thanks for filling out!
From Barry Pollock : Geoffrey - no names - we just look at the total percentage right and wrong (the whole group) - thanks for filling out!
Attendance and Certificates
The following is a list of attendees for this training. Those on this list can apply for 2 hours of continuing education credit to be applied to their water or waste water operator certification renewal:
- Last Name First Name
- Acaso Edito
- Antatico Romeo
- Arriola Glenn
- Banaag Marlon
- Blackcloud Randy
- Cabrera Geoffrey
- Chambers Derek
- Changar Luke
- Concepcion Victor
- Corpuz Tasi
- Cruz Arnel
- Cruz Benjamin
- Dikito Glenn
- EDA HIRONOBU
- Feliciano Invitus
- Flores Austin
- Formalejo Dennis
- Gamier Rosanna
- Guerrero Chris
- Hidalgo David
- Ignacio Petronilo
- Iriarte Emma
- Jimenez Ma Viveth
- Kaneshi Martelina
- Keremius Bernard
- Kukkun Kashi
- Lebria Alan
- LEE CHONG NAM
- Magboo Jaime
- MAGTALAS RUEL
- Manucdoc Edmundo
- Massa Bryan
- Melchor Geoffrey
- Milano Cecilio
- Nelson Mark
- Ortiz Pedro
- OVAL, JR. REOLIE
- Panuringan Melissa
- Pollock Barry
- PUYAT JOEL
- QUINTOS ROSALIO T.
- Reyes Jeffrey
- Reyes K. Alley
- RIVERA ANTONINO
- Roquelara Raymond
- Santos John
- Spaeth Travis
- Taisacan Jester
- Tuazon Edgar
Last modified: 01/17/2022 left 1 person out that had legitimately attended
3/17/2021 (re-uploaded all certificates with correct names and dates)
3/17/2021 (re-uploaded all certificates with correct names and dates)