• Contact Us
  • Bookstore
  • Events Calendar
  • People & Products
  • Publications
  • Login
Search

National Ground Water AssociationNational Ground Water Association

Groundwater Expo
The Well
Facebook
LinkedIn
Twitter
YouTube
Click to join the mailing list!
  • About Us
    • Contact NGWA
    • NGWA partnerships around the world
    • NGWA Code of Regulations (PDF)
    • NGWA annual report (PDF)
    • National Board of Directors
    • NGWA awards
    • Advertising opportunities
    • Privacy policy
    • Proprietary legend and disclaimers
    • E-mail discussion groups: The rules, etiquette, and policies
    • Antitrust advisory
  • Member Center
    • NGWA membership
    • Member directory
    • Community site -- join the discussion
    • Member exclusive content
    • Member insurance programs
    • Member benefits from NGWA partners
    • Committees
    • Interest groups
    • Volunteer opportunities
    • Update contact information
    • Update username/password
    • Affiliate State Program
    • Associated Societies
  • Advocacy-Awareness
    • Government affairs
    • Join the NGWA grassroots effort
    • NGWA Washington Fly-in
    • Current initiatives
    • Position papers
    • State contacts
    • State groundwater monitoring programs
    • Tools for contacting congressional members
    • NGWA-PAC
  • Events-Education
    • NGWA events and educational offerings
    • Groundwater industry calendar of events
    • Groundwater Expo
    • Groundwater Summit
    • Recordings of past events
    • Custom training
    • Calls for papers
    • Certification
    • Agencies recognizing NGWA offerings
    • State-approved NGWA courses
    • Drilling schools
    • Business to University program
    • Profit Mastery University
    • Darcy Lecture Series
    • McEllhiney Lecture Series
    • Awareness Week
    • Protect Your Groundwater Day
    • NGWA instructor biographies
    • NGWA event policies
    • Request to cosponsor NGWA event
    • Request for NGWA to cosponsor your event
  • Professional Resources
    • Bookstore
    • Publications
    • Buyers guides
    • Career Center
    • NGWA Archives (previously known as Groundwater On-line)
    • Groundwater and Soil Contamination Database
    • ConsensusDocs
    • Construction State Law Matrix
    • Consumer information sheets
    • Certifications and exams
    • Groundwater industry careers
    • Groundwater industry links
    • Industry best suggested practices
    • Safety resources
    • State information
    • NGWA standards development
    • Business to University program
  • Charitable Foundation
    • Donate to NGWREF
    • About NGWREF
    • 21st Century Fund
    • Darcy Lecture Series
    • Developing Nations Fund
    • Farvolden Award
    • Groundwater Research Fund
    • Len Assante Scholarship Fund
    • McEllhiney Lecture Series
    • USA Groundwater Fund
  • Groundwater Fundamentals
    • Groundwater fact sheets
    • Geothermal heat pumps
    • Groundwater hydrology
    • Groundwater use
    • Information for kids
    • Information for teachers
    • Information for well owners
    • NGWA observation well
    • Reference sites and links
    • State information
    • Tools for studying groundwater
    • Virtual Museum of Groundwater History
  • Media Center
    • Newsroom
    • Information briefs
    • Issues background
    • Awareness Week
    • Protect Your Groundwater Day
    • Consumer information sheets
    • WellOwner.org
Skip Navigation LinksNGWA.org / Search Center
INFORMATION FOR...
  • Scientists & Engineers
  • Contractors
  • Manufacturers & Suppliers
  • Students
Email This Page
  •  All Site Content

Search Results

Advanced search...

Improve your searches with search tips

View full search results or click on a tab to select a subset of the results.

To access abstracts and PDFs of past NGWA articles and proceeding click on NGWA Archives.

Full SearchNGWA ArchivesAdvocacyBookstoreEvents/EducationFoundationFundamentalsMedia CenterMember CenterProfessional
Web Page
IT'S ALL RELATIVE
WATER WELL JRNL; V43 N12; P10 … 0043-1443 … PARTS PER BILLION AND PARTS PER TRILLION ARE EXPLAINED IN TERMS OF PROPORTIONS OF TIME MEASUREMENTS, MONEY, AND DISTANCES. …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=607344

Web Page
IT'S ALL RELATIVE
WATER WELL JRNL; V43 N12; P10 … 0043-1443 … PARTS PER BILLION AND PARTS PER TRILLION ARE EXPLAINED IN TERMS OF PROPORTIONS OF TIME MEASUREMENTS, MONEY, AND DISTANCES. …
Date: 5/20/2013

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=607344

Web Page
RD20
WATER WELL JRNL; V39 N10; P60 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=597217

Web Page
RD20
WATER WELL JRNL; V39 N10; P60 … 0043-1443 …
Date: 5/20/2013

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=597217

Web Page
INSTALLING SUBMERSIBLES
WATER WELL JRNL; V29 N; P47-48 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=575861

Web Page
PORTABLE RIG DIRECTORY CORRECTIONS AND CHANGES
WATER WELL JRNL; V36 N1; P18 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=589720

Web Page
FLEXIBLE MEMBRANE LINERS RECEIVE NSF LISTING
WATER WELL JRNL; V39 N9; P20 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=596992

Web Page
INDICTMENTS IN TRENCHING DEATHS
WATER WELL JRNL; V40 N4; P24 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=598552

Web Page
NYLON BRUSH HELOS REJUVENATE WELLS
WATER WELL JRNL; V40 N10; P10 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=599119

Web Page
LICENSING FOR CALIFORNIA
WATER WELL JRNL; V41 N1; P12 … 0043-1443 …
Date: 11/22/2012

http://www.ngwa.org/_bdc/http___www_ngwa_org/GWOL Data_1.aspx?RecordID=600240

 
1234
1-10 of about 8,500 results
Partner site search engines
 

Search for documents, people and organizations in the IGRAC's Meta Information Module




Advertise on NGWA.org

navigation
customer service

customerservice@ngwa.org
800 551.7379 (614 898.7791 outside the United States)
8 a.m.-5 p.m. ET Monday through Friday
fax 614 898.7786


payment mailing address

NGWA
PO Box 715435
Columbus, OH 43271-5435
USA

headquarters

National Ground Water Association
601 Dempsey Rd.
Westerville, OH 43081
USA
800 551.7379
(614 898.7791 outside the US)
fax 614 898.7786
ngwa@ngwa.org