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Sampling of Residual Sediment in Flood Impacted Areas
Orleans Parish
St. Bernard Parish
Orleans Parish (Zip Code 70117- Total Samples in February = 64)
Polycyclic Aromatic Hydrocarbon (PAH)
Benzo(a)pyrene was detected in 10 samples at levels ranging from 427 ug/kg to 7510 ug/kg. Dibenz(a,h)anthracene was detected in 5 samples with levels ranging from 333 ug/kg to 1680 ug/kg. The LDEQ RECAP value for Benzo(a)pyrene and Dibenz(a,h)anthracene is 330 ug/kg. (See Enviromapper sample stations 19291, 19295, 19312, 19320, 19322, 19324, 19347, 19353, 19377, 19403, 19412 )
Benzo(a)anthracene was detected in 6 samples at levels ranging from 771 ug/kg to 8700 ug/kg. Benzo(b)fluoranthene was detected in 26 samples at levels ranging from 629 ug/kg to 15100 ug/kg. Indeno(1,2,3-cd)pyrene was detected in 15 samples from 632 ug/kg to 4570 ug/kg. The LDEQ RECAP value for Benzo(a)anthracene, Benzo(b)fluoranthene and Indeno(1,2,3-cd)pyrene is 620 ug/kg. (See Enviromapper sample stations 19291, 19295, 19312, 19320, 19322, 19324, 19326, 19347, 19349, 19353, 19355, 19371,19377, 19381, 19403, 19408, 19412, 19414, 19423, 19434, 19468, 19472, 19474,19476, 19480, 19488, 19490, 19492, 19506, 19509, 19510)
Although the levels of these PAHs exceed their respective RECAP values, the levels in all but one sample fall within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to those concentrations, which USEPA has found acceptable in other contexts. Benzo(a)pyrene was detected in one sample at 7510 ug/kg. (See Enviromapper sample station 19320) Assuming long-term exposures to children and adults in a residential setting, this concentration exceeds EPA’s excess lifetime cancer risk range. USEPA and LDEQ will work together to determine next steps at this location.
Pesticides
The pesticides, beta-BHC and Dieldrin, were detected at levels exceeding LDEQ RECAP values. Beta-BHC, was detected in one sample at 330 ug/kg. The LDEQ RECAP value for beta-BHC is 290 ug/kg. Dieldrin was detected in 6 samples at levels ranging from 42.9 ug/kg to 94.3 ug/kg. The LDEQ RECAP value for Dieldrin is 30 ug/kg. (See Enviromapper sample stations 19285, 19310, 19353, 19377, 19414, 19429)
Although the levels of these pesticides exceed their respective RECAP values, the levels fall within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to those concentrations, which USEPA has found acceptable in other contexts.
Polychlorinated Biphenyls (PCBs)
Arochlor-1016, was detected in one sample at 20100 ug/kg. The LDEQ RECAP value for all PCB compounds is 210 ug/kg. (See Enviromapper sample station 19381)
Although the level of this PCB exceeds its RECAP value, the level falls within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to that concentration, which USEPA has found acceptable in other contexts.
Metals
Arsenic was detected in 3 samples at levels ranging from 12.6 mg/kg to 22.3 mg/kg (12600 ug/kg to 22300 ug/kg). Arsenic has a LDEQ RECAP value of 12 mg/kg (12000 ug/kg). (See Enviromapper sample stations 19295, 19322, 19324)
Although the levels of Arsenic exceed the RECAP value, the levels fall within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to those concentrations, which USEPA has found acceptable in other contexts.
Lead was detected in one sample at 657 mg/kg. Lead has a LDEQ RECAP value of 400 mg/kg (400,000 ug/kg). (See Enviromapper sample station 19414) USEPA and LDEQ will work together to determine next steps at this location.
Diesel and Oil Range Organics
Oil range organics were detected in 6 samples at levels ranging from 1920 mg/kg to 3550 mg/kg (1,920,000 ug/kg to 3,550,000 ug/kg). Diesel range organics were detected in 5 of these samples at levels ranging from 973 mg/kg to 1810 mg/kg (973,000 ug/kg to 1,810,000 ug/kg). The LDEQ RECAP value is 1800 mg/kg (1,800,000 ug/kg) for oil range organics and 650 mg/kg (650,000 ug/kg) for diesel range organics. (See Enviromapper sample stations 19295, 19324, 19355, 19408, 19414, 19434) USEPA and LDEQ will work together to determine next steps at these locations.
Orleans Parish (Zip Code 70122 – Total Samples in February = 15)
Polycyclic Aromatic Hydrocarbon (PAH)
Benzo(a)pyrene was detected in 3 samples at levels ranging from 338 ug/kg to 409 ug/kg. Dibenz(a,h)anthracene was detected in 4 samples with levels ranging from 393 ug/kg to 820 ug/kg. The LDEQ RECAP value for Benzo(a)pyrene and Dibenz(a,h)anthracene is 330 ug/kg. (See Enviromapper sample stations 20874, 20876, 20880, 20884, 21100)
Benzo(b)fluoranthene was detected in 3 samples at levels ranging from 631 ug/kg to 951 ug/kg. The LDEQ RECAP value for Benzo(b)fluoranthene is 620 ug/kg. (See Enviromapper sample stations 20880, 21100, 21112 )
Although the levels of these PAHs exceed their respective RECAP values, the levels fall within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to those concentrations, which USEPA has found acceptable in other contexts.
Diesel and Oil Range Organics
Diesel and oil range organics were detected in one sample at 8620 mg/kg and 18500 mg/kg (8,620,000 ug/kg and 18,500,000 ug/kg, respectively. The LDEQ RECAP value is 650 mg/kg (650,000 ug/kg) for diesel range organics and 1800 mg/kg (1,800,000 ug/kg) for oil range organics. (See Enviromapper sample station 21108) USEPA and LDEQ will work together to determine next steps at this location.
Orleans Parish (Zip Code 70126 – Total Samples in February = 85)
Polycyclic Aromatic Hydrocarbon (PAH)
Benzo(a)pyrene and Dibenz(a,h)anthracene were detected in one sample at 355 ug/kg and 359 ug/kg, respectively. The LDEQ RECAP value for Benzo(a)pyrene and Dibenz(a,h)anthracene is 330 ug/kg. (See Enviromapper sample station 21399)
Benzo(b)fluoranthene was detected in 2 samples at 837 ug/kg and 844 ug/kg. The LDEQ RECAP value for Benzo(b)fluoranthene is 620 ug/kg. (See Enviromapper sample stations 20109, 21399 )
Although the levels of these PAHs exceed their respective RECAP values, the levels fall within a risk range, of 1 in 1,000,000 to 1 in 10,000 risk of an individual developing cancer over a lifetime from exposure to those concentrations, which USEPA has found acceptable in other contexts.
Diesel and Oil Range Organics
Diesel range organics were detected in 7 samples at levels ranging from 656 mg/kg to 3710 mg/kg (656,000 ug/kg to 3,710,000 ug/kg). Oil range organics were detected in 4 of these samples at levels ranging from 2500 mg/kg to 5080 mg/kg (2,500,000 ug/kg to 5,080,000 ug/kg. The LDEQ RECAP value is 650 mg/kg (650,000 ug/kg) for diesel range organics and 1800 mg/kg (1,800,000 ug/kg) for oil range organics. (See Enviromapper sample stations 19559, 19566, 21399, 21405, 21411, 21415, 21440 ) USEPA and LDEQ will work together to determine next steps at these locations.
St. Bernard Parish (Zip Code 70092 – Total Samples in February = 4)
Diesel and Oil Range Organics
Diesel and oil range organics were detected in duplicate samples collected at the same sampling station. Diesel range organics were detected at 940 mg/kg and 1210 mg/kg (940,000 ug/kg and 1,210,000 ug/kg). Oil range organics were detected at 3220 mg/kg and 3750 mg/kg (3,220,000 ug/kg and 3,750,000 ug/kg). The LDEQ RECAP value is 650 mg/kg (650,000 ug/kg) for diesel range organics and 1800 mg/kg (1,800,000 ug/kg) for oil range organics. (See Enviromapper sample station 19280 ) USEPA and LDEQ will work together to determine next steps at this location.