| OCR Text |
- Appendix 35 Organochlorines in fish tissue ( whole body) and bed sediment Study- unit frequency of detection, in percent National frequency of detection, in percent 1 Study- unit sample size __ J_ total- Chlordane ( sum of 5 chlordanes) 0 47 80 85 67 56 0 9 25 61 0 18 p, p'- DDE * ** 100 90 100 90 100 92 0 47 50 68 33 43 100 90 100 90 100 92 0 47 50 68 33 43 o, p'+ p, p'- DDE ( sum of o, p'- DDE and pp'- DDE) total- DDT ( sum of 6 DDTs) 100 90 100 92 100 93 0 48 50 71 33 45 50 43 80 75 67 68 0 3 25 29 0 11 PCB, total 1 2 5 3 CONCENTRATION, IN MICROGRAMS PER KILOGRAM ( Fish tissue is wet weight; bed sediment is dry weight) The national detection frequencies for total PCB in sediment are biased low because about 30 percent of the samples nationally had elevated detection limits compared to this Study Unit. See http:// water. usgs. gov/ nawqa/ for additional information. Other organochlorines detected o, p'+ p, p'- DDD ( sum of o, p'- DDD and p, p'- DDD) * o, p'+ p, p'- DDT ( sum of o, p'- DDT and p, p'- DDT) * Dieldrin ( Panoram D- 31, Octalox) * Dieldrin+ aldrin ( sum of dieldrin and aldrin) ** Hexachlorobenzene ( HCB) ** Organochlorines not detected Chloroneb ( chloronebe, Demosan) * ** DCPA ( Dacthal, chlorthal- dimethyl) * ** Endosulfan I ( alpha- Endosulfan, Thiodan) * ** Endrin ( Endrine) gamma- HCH ( Lindane, gamma- BHC, Gammexane) * Total HCH ( sum of alpha, beta, gamma, and delta- HCH) Heptachlor epoxide ( Heptachlor metabolite) * Heptachlor+ heptachlor epoxide ** Isodrin ( Isodrine, Compound 711) * ** p, p'- Methoxychlor ( Marlate, methoxychlore) * ** o, p'- Methoxychlor * ** Mirex ( Dechlorane) ** Pentachloroanisole ( PCA, pentachlorophenol metabolite) * c/' s- Permethrin ( Ambush, Astro, Pounce) * ** frans- Permethrin ( Ambush, Astro, Pounce) * ** Toxaphene ( Camphechlor, Hercules 3956) * ** Semivolatile organic compounds ( SVOCs) in bed sediment Study- unit frequency of detection, in percent National frequency of detection, in percent 1 Study- unit sample size Benzo[ a] pyrene 0 47 75 89 33 63 1 p- Cresol 00 65 50 76 33 69 • 0.001 0.01 0.1 1 10 100 1,000 10,000 100,000 CONCENTRATION, IN MICROGRAMS PER KILOGRAM, DRY WEIGHT Other SVOCs detected Acenaphthene Acenaphthylene Acridine ** Anthracene Anthraquinone ** Benz[ a] anthracene Benzo[ fo] fluoranthene ** Benzo[ gf,/ 7,/] perylene ** Benzo[/ c] fluoranthene ** 9H- Carbazole ** Chrysene Di- n- octylphthalate ** Dibenz[ a, ft] anthracene Dibenzothiophene ** 1,3- Dichlorobenzene ( m- Dichlorobenzene) ** 1,4- Dichlorobenzene ( p- Dichlorobenzene, 1,4- DCB) ** 1,2- Dimethylnaphthalene ** 1,6- Dimethylnaphthalene ** 2,6- Dimethylnaphthalene ** Dimethylphthalate ** Fluoranthene 9H- Fluorene ( Fluorene) lndeno[ 1,2,3- c, c(] pyrene ** 1- Methyl- 9/-/- fluorene ** 2- Methylanthracene ** 4,5- Methylenephenanthrene ** 1- Methylphenanthrene ** 1- Methylpyrene ** Naphthalene Phenanthrene Pyrene 2,3,6- Trimethylnaphthalene ** |
