ground-water monitoring | I2M Consulting

Tag (Keyword): ground-water monitoring

I2M Team Produces Another Paper: An Anatomy of a Case of Brine Occurrence in Shallow Groundwater of North-Central Ohio, USA

The I2M team led by Chief Hydrogeologist, Michael D. Campbell, C.P.G., P.G., P.H., and supported by M. David Campbell, P.G., VP and Senior Program Manager; Roger W. Lee, Ph.D., P.G., I2M’s Senior Geochemical Associate; and by Glen A. Collier, C.P.G., P.G., Senior Hydrogeologist of Hydrex Environmental, LLC in Nacogdoches, Texas have collaborated to produce the paper published by the Journal of Geology and Geoscience, London entitled:

“Anatomy of a Case of Elevated Chloride in the Shallow Black Hand Sandstone Providing Rural Drinking Water Supplies in North-Central Ohio, USA: Hydrogeological and Hydrochemical Characterization by Major and Minor Elements, and δ²H, δ¹⁸O, δ¹³C and Tritium (³H) Isotopes.”

Authors pre-publication copy (here).

Summary Abstract: Elevated chloride concentrations (>250 mg/l) were reported to the Ohio State Environmental Protection Agency in the early 2000s by a rural resident using groundwater for domestic consumption from a private water well. An adjacent commercial oil and gas pipe yard had spread relatively small volumes of oilfield brines from 1998 through 2000 to control dust during summers and to de-ice on the property driveways; county and state agencies used halite and other brines on surrounding rural county and state highways during the winter. There are multiple sources in the immediate area that might have contributed to local groundwater by varying degrees, resulting in elevated chloride concentrations reported in the samples from the on-site monitoring wells and from the neighborhood water wells over the years prior to 2004, the time of our investigations. See full abstract in paper.

Keywords: Black Hand Sandstone; Cuyahoga shales; siltstones and sandstones; glacial till; rural groundwater supplies; rural water wells; nested monitoring wells; de-icing activities; use of brine; elevated chloride concentrations; major and minor element hydrochemistry; hydrogeological investigations; ²H (deuterium) and ¹⁸O isotopes; ¹³C (DIC); ³H (tritium); Clinton brine; water-softening systems; septic-tank and leach-field/drain-field systems.

mdc2025-12-29T16:06:48-06:00December 2nd, 2017|Tags: brine, Chloride, ground-water monitoring, I2M, journal|

PERC ground-water monitoring program at Tacoma, Washington industrial site

Jeffrey D. King, P.G., President of I2M Associates, LLC and of PERC, announced today the successful initiation of a long-term PERC ground-water monitoring program at a Tacoma, Washington industrial site. I2M Associates, LLC is providing hydrogeological support to the program led by I2M’s Chief Hydrogeologist, Michael D. Campbell, P.G., P.H. The program is now remotely recording data from six monitoring wells, three installed at three corners of the site in a shallow confined aquifer and three in a confined aquifer of intermediate depth, as well as monitoring local rainfall and battery voltage, which is recharged by solar panels: http://www.i2m-stevens.com/overview.php

The purpose of the program is to characterize the potential impact of:

diurnal tidal fluctuations,
rainfall recharge, and
other environmental factors (i.e., barometric-pressure fluctuations, earthquakes disturbances, and possible compression of the confined aquifers by passing trains adjacent to the site).

The program became necessary because of the rapidly fluctuating water levels indicated by monthly and daily manual measurements of the monitoring wells screened in the two aquifers did not permit the characterization of the pressure distribution and hence ground-water flow direction within the two confined aquifers with any certainty. Manual monthly monitoring provided only a “snap-shot” in time which produced a potentiometric surface map that was only accurate for that specific “snap-shot” in time. A continuous monitoring program with 15-minute data readouts is required to appropriately characterize the rapidly changing subsurface conditions and has recently confirmed complex, but identifiable patterns of ground-water flow. The program will be operated through a number months of changing seasons in the Tacoma region and will result in reduced costs of data management while increasing data reliability for site characterization of subsurface conditions.

admin2025-12-29T16:33:14-06:00December 27th, 2012|Tags: ground-water monitoring|