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Ashumet Pond Geochemical Barrier Project

Photographs:

ironbags.JPG (52006 bytes)

Bags of iron being off-loaded to equipment/supplies staging area at boat ramp

alliron.JPG (72553 bytes)

All the iron bags are on-site and stored at the boat ramp

mixingiron.JPG (47979 bytes)

Mixing the ZV-iron flakes with sorted sediments

part1backfill.JPG (45889 bytes)

The first part of the barrier is completed by backfilling the excavated area with sorted sediments that have been mixed with the ZV-iron flakes

siftbucket.JPG (75767 bytes)

A close-up picture of the sifting/mixing bucket

mixiron.JPG (82318 bytes)

Moving bag of ZV-iron over pile of excavated sediments to dump on top for mixing

part4backfill.JPG (65029 bytes)

More of the barrier area has been installed

usgsVert.JPG (94119 bytes)

Two of the vertical, multi-level sampling devices installed by the U. S. Geological Survey's (USGS) scientists for monitoring the performance of the iron barrier after it is installed

usgsHoriz.JPG (58037 bytes)

One of the horizontal, multi-location sampling devices installed by USGS scientists for monitoring the performance of the iron barrier after it is installed

usgsHZaccess.JPG (100485 bytes)

USGS scientists installing access boxes for two of the horizontal, multi-location sampling devices

boatview1.JPG (82360 bytes)

View of the barrier project from a boat on the pond

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Close-up of USGS vertical, multi-level sampling devices

usgsVtdy2.JPG (54047 bytes)

USGS scientists installing one of the vertical, multi-level sampling devices

usgsHzdy2.JPG (101265 bytes)

USGS scientists installing one of the horizontal, multi-level sampling devices

usgsseep.JPG (73498 bytes)

More USGS monitoring equipment installed in the barrier area

lastsec.JPG (61169 bytes)

Last section of the barrier is excavated

barrierox.JPG (83983 bytes)

Oxidized iron from sections of installed barrier