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What do EPD’s monitoring results show?
Recent EPD monitoring shows elevated tritium
(H-3) in virtually all media – air, surface water,
groundwater, rain, milk, vegetation, fish and
game; cobalt 60 (Co-60) in river sediment;
strontium 90 (Sr-90) in leafy vegetation and fish;
iodine-129 (I-129, an extremely long-lived fission
product) in surface water; cesium 137 (Cs-137) in
deer, fish, soil and river sediment; plutonium
238 (Pu-238) in river sediment; and plutonium
239 (Pu-239) in soil and river sediment.
How significant are EPD’s findings?
Tritium (H-3) in water ranges from 5% of EPA’s
Drinking Water Maximum Contaminant Level
(MCL) in Savannah, to well over 100% of the
MCL at the mouths of SRS site streams. I-129 in
surface water at the mouth of Four Mile Creek
typically runs 25% - 50% of the MCL for I-129.
Cs-137 in fish, while not sufficiently elevated to
cause any short term health concern, is
sufficiently elevated to cause concern for persons
who eat significant quantities of fish over several
years, particularly fish caught in or near the
mouths of SRS site streams. Sr-90 in vegetation,
again while not sufficiently elevated to cause
short-term health concerns, may be of concern
for those whose diet contains significant
quantities of leafy vegetables.