NEW ENGLAND COASTAL BASINS LIAISON COMMITTEE
and proposed ground-water monitoring activities
for the New England Coastal Basins NAWQA Study - March, 1999
Purpose of study
Where and When Would this
Specifics of Activity
||Determine how recent development of
formerly rural areas affects the quality of shallow ground waters
in terms of nutrients, VOCs, pesticides, and trace elements.
Sites have been selected in newly urbanized (post-1960s)
areas located over stratified drift deposits in the Boston metropolitan
area (eastern Massachusetts and south/southeastern New Hampshire
- see the enclosed figure). Monitoring wells have been installed
since September, 1998 at 25 sites.
Well drilling will be completed in the Spring, 1999 with sampling
of the wells to be completed in the Summer, 1999.
- Well sites were randomly located after screening
for appropriate percent of new urban land uses within a 500 meter
distance from the site.
- A number of selected sites had unsuitable stratified drift deposits
for a well (too shallow to bedrock, clays present)
- Each well to be sampled once. Age-dating of the water will be
||Assess variations in water-quality,
with a focus on trace metals (arsenic, iron, and manganese), in
3 major lithochemical bedrock groupings and determine if the water-quality
variations found in retrospective analysis can be duplicated.
||The 3 major lithochemical bedrock groupings
include: calcareous metasedimentary rocks, noncalcareous metasedimentary
rocks, and felsic igneous rocks.
Calcareous metasedimentary sampling would be completed by December,
1999; noncalcareous metasedimentary sampling completed in the Summer,
2000; and felsic igneous sampling completed by the end of 2000.
- 30 existing wells to be sampled in each bedrock
group (likely a combination of domestic and public supply wells);
wells to be randomly located and will reflect a variety of land
- Nutrients, trace metals, VOCs, and pesticides proposed to be
sampled in the calcareous metasedimentary study; nutrients and
trace metals proposed for the noncalcareous metasedimentary and
felsic igneous studies; age-dating of water performed in all studies.
- Geochemical modeling for metals (arsenic) being considered.
||Assess the quality of water in the
most important water-supply aquifer in the study unit and determine
if water-quality in the aquifer throughout the study unit varies
by land use.
||Stratified drift deposits throughout
the study unit will be included.
Study is proposed for 2001.
| - 30 existing wells to be sampled
in each bedrock group (likely a combination of domestic and public
supply wells); wells to be randomly located and will reflect a variety
of land uses.
- Nutrients, trace metals, VOC, and pesticide analyses to be done
along with age-dating of water.
Department of the Interior
U.S. Geological Survey
New Hampshire/Vermont District, USGS, 361 Commerce Way, Pembroke, NH
Comments and feedback: NH/VT firstname.lastname@example.org
Last Updated January 9, 2013
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