Ground Water Perspective
A new water well construction standard that does the job
While the ground water industry cannot seem to win the discourse over terms, it can set some standards:
After decades of ANSI/AWWA Standard A 100 ruling the roost, the National Ground Water Association (NGWA) is in the process of publishing a standard for water well construction and development, ANSI/NGWA Standards 01 to 07. Watch the NGWA web site (see our links) for news of a date.
A 100 is bass boat - NGWA 01-07 is a cabin cruiser. The standard is based on the 1998 version of the NGWA's Manual of Water Well Construction Standards that I had the privilege to edit. The 1998 edition was an update of the 1975 Manual, which was set up to be a well construction standard, but never was formalized as such for some reason. Both the 1970s and the current efforts involve multiple topical committees of seasoned veterans from all over the USA. I had the privilege of working on the well development and well disinfection sections.
NGWA 01-07 was developed in two stages, first developing Version 3 of the Manual of Water Well Construction Practices, then boiling this down into the tighter "sound bites" of a standard ("do this, do that"). The result is a specific yet flexible standard that covers the considerable range of practice.
When it is published (in 2012?), we urge you to use it and make sure your regulatory bodies have and use it. The work will improve the state of the art.
Hamilton operates several very high-capacity well fields in the Miami River Valley aquifer for both potable and power plant cooling supply in a highly developed urban-suburban setting. Work includes characterizing wellfield performance, updating and correcting the existing regionally constructed MODFLOW model of the aquifer, and pioneering projecting output in GIS to provide detailed visual representation of impacts on known geographical locations, plus technical assistance in liaison with Ohio EPA and other regional entities. A virtual redoing of antiquated MODFLOW files and reporting was conducted in two months on schedule. New well specifications, construction supervision and testing on rapid timescales for power cooling has been completed. Planning included interaction with PRPs of a Superfund site, a test drilling program (including sonic methods in deep, coarse glacial material), design and installation of a monitoring array, and well design, construction supervision and testing. We can handle your big job.
Effective control of the recharge area helps to assure that harmful contaminants do not enter the well, especially for wellfields with little protection from surface contamination.