|Environmental Fate|| TERRESTRIAL FATE: EVEN AFTER MIXING SOIL TO DEPTH OF 15.24 CM
/DDD RECOVERED FROM AIR ABOVE TEST PLOTS FOR LONG PERIODS. CONCN
OF DDD FELL BY 2ND DAY & ONLY VERY SLOWLY & IRREGULARLY
THEREAFTER, BEING MEASURABLE OVER 6 MO LATER. ONCE DDD
APPLIED TO SOIL OF TEST PLOTS IT COULD BE DETECTED IN SLIGHTLY
HIGHER CONCN ABOVE NON-FLOODED THAN ABOVE FLOODED PLOTS.
DDD DEGRADED OR DISSIPATED SLOWLY IN AIR, WATER, & SOIL. PERSIST IN
ENVIRONMENT SO SPECIES TEND TO RECEIVE CONTINUING INTAKE, ONCE
ABSORBED PERSIST IN ORGANISM.
TERRESTRIAL FATE: If DDD is released to soil it will adsorb very strongly to the soil and
should not leach to the groundwater, although its presence in groundwater illustrates that it can
be transported there. It will not appreciably hydrolyze under normal environmental conditions and
biodegradation is expected to be slow.
AQUATIC FATE: If DDD is released to water it will adsorb very strongly to sediment and will
bioconcentrate in aquatic organisms. It will not appreciably hydrolyze or directly photolyze
(estimated half-life for direct photolysis in water >150 years ) and biodegradation is expected to
be slow. Indirect photolysis may be substantial, based on the behavior of the related compound
DDT. Evaporation may be important with a half-life of 1.82 days predicted for evaporation from a
river 1 m deep, flowing at 1 m/sec with a wind velocity of 3 m/sec; however, the expected
adsorption of DDD to sediments may retard the evaporation process.
ATMOSPHERIC FATE: If DDD is released to the atmosphere it will not be expected to directly
photolyze. The estimated vapor phase half-life in the atmosphere is 1.71 days as a result of
reaction with photochemically produced hydroxyl radicals . The major translocation
mechanisms for DDD in air is fallout and washout since DDD should adsorb to particulate
|Drinking Water Impact|| DRINKING WATER: DDD: Rural Hampton County, SC, potable water supplies, 45.5%
pos samples, avg 129 ppt, not detected (nd)-779 ppt; concn by land use, Hampton County
(Chesterfield County), SC, drinking waters, agriculture, avg 156 ppt (66 ppt), nd-588 ppt
(nd-4333 ppt), forest, avg 3 ppt (237 ppt), nd-35 ppt (nd-690), residential, avg 392 ppt (25 ppt),
nd-779 (nd-112 ppt) .
GROUNDWATER: p,p'-DDD: New Jersey, 1977-79, 1074 samples, 9.6% pos, max concn 0.4
ppb . DDD: California, wells, detected, not quantified .
SURFACE WATER: p,p'-DDD: Hawaiian Islands, 1970-71: 4 islands, 25% pos (Oahu), 46
samples, 52% pos, range, 0.1-18.0 ppt, range of avg, not detected(nd)-7.8 ppt, overall avg pos,
3.4 ppt; waters from 13 rural areas, 0.1-10.00 ppt, avg 3.1 ppt, 24 urban areas, 0.8-18.0 ppt, avg
3.4 ppt . Columbia Basin, WA, 1961 irrigation season, detected at 2 sites, both 0.4 ppt . New
Jersey, 1977-79, 604 samples, 27% pos, max concn, <0.1 ppb . US, selected western streams: