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Sep 25, 2025

KIdder Point and GAC Chemical links

 AT ISSUE. Kidder Point's shore received thousands of tons of highly toxic acid and heavy metal rich waste slurries between 1940 and 1970, laid down as fill material behind wooden cribs . Broadening and elevating the surface of the 5 acre peninsula (Kidder Point) that the abandoned acid factory is perched on. The cribs weren't maintained after 1970 when shoreline dumping was banned under the federal Clean Water Act. Some of them have failed: See Here and Here and Here

Kidder Point Industrial Site History
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News & reports from 1903 -1974 about this site & nearby Mack Point
1984 DEP consultant's 1984 sulfuric acid spill report.
1984 Surface sampling
1984 pH testing of acid spill. Drawn map
1990 Testing of 'Alum Reactor Waste' 9/14/90
1993 DEP consultant's 1993 site summary
1998 photo of tainted mud (acid tank in background)
1998 site assessment by Delta Chemical 3/17/98 pt1
1998 site assessment 3/17/98 pt2
1998 media coverage of spill detection & cleanup
2002 draft settlement agreement CLF & GAC

MAP
See a large 1993 map of then-Delta Chemical's waste sites and landfills .
Google earth aerials of site 1997-2011
2011 GAC Chemical aerial w/company property lines.
(5) Kidder Point waste fill areas
2004 Aerial with now-razed fertilizer-then-bauxite quonset hut. *** w/o quonset hut (2011).

MDEP staff with oversight responsibilities

July 17, 2014 Lighthawk Flight
GAC property, Sears Island & upper Penobscot Bay
Abandoned Peninsula, old acid factory, plume
Abandoned sulfuric acid plant, plume
Abandoned acid plant from above, close-in plume
*

MDEP staff with oversight responsibilities

July 17, 2014 Lighthawk Flight
GAC property, Sears Island & upper Penobscot Bay
Abandoned Peninsula, old acid factory, plume
Abandoned sulfuric acid plant, plume
Abandoned acid plant from above, close-in plume

May 3, 2013 LightHawk Flight
Tainted cove looking South. ** looking North.
Kidder Point tainted cove & Sears Island.
Old acid factory, eroding wastes & leacheates

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