USGS
 Environmental Geochemistry and Sediment Quality in Lake Pontchartrain

Table 7. Organic Constituents  (in Order of Frequency of Occurrence)

This table gives the total number of samples analyzed for the given constituents. Values below detection limit are counted.

Compound # of analyses
Pyrene 360
Fluoranthene 359
Phenanthrene 350
Chrysene 341
Perylene 341
Benz(a)anthracene 336
Benzo(a)pyrene 336
Indeno(1,2,3)Pyrene 334
Anthracene 333
Benzo (g,h,i) Perylene 332
Fluorene 324
Naphthalene 323
Benzo(e)pyrene 316
Acenaphthene 315
Benzo (b) fluoranthene 308
Benzo (k) fluoranthene 308
Diethyl phthalate 52
Acenaphthylene 50
Dibenz(a,h)anthracene 301
2-Methyl-Naphthalene 295
PCB 138 288
2,6-Dimethylnaphthalene 287
1-Methyl-Phenanthrene 277
1-Methyl-Naphthalene 33
Dibenzothiophene 268
2,3,5-Trimethylnaphthalene 262
Biphenyl 243
Naphthalenes (C1) 242
Naphthalenes (C2) 240
DDD Total 238
C1 Phenanthrenes 238
Phenanthrene (C2) 238
Dibenzothiophene (C2) 237
Naphthalenes (C3) 237
C1 Fluoranthene Pyrene 237
Dibenzothiophene (C1) 236
Phenanthrene (C3) 235
Chrysene (C1) 235
Dibenzothiophene (C3) 233
Fluorene (C1) 230
Fluorene (C2) 230
Chrysene (C2) 230
PCB 101 228
Compound # of analyses
Naphthalenes (C4) 228
Phenanthrene (C4) 228
PCB 180 223
Fluorene (C3) 219
PCB 153 200
PCB 118 198
Tributyl tin 191
Hexachlorobenzene 186
Chlordane (gamma) 183
PCB 28 178
PCB 44 177
PCB 52 176
Chlordane (alpha) 176
Monobutyl tin 156
Chrysene (C3) 156
Chrysene (C4) 156
PCB 187 153
Trans-nonachlor 153
Dibutyl tin 152
PCB 105 149
CIS-Nonachlor 141
BHC (alpha) 140
DDT total 135
PCB 66 135
PCB 8 133
PCB 77 128
Lindane 128
PCB 128 122
PCB 206 112
Heptachlor 91
PCB 18 87
Aldrin 86
PCB 126 83
PCB 209 83
Heptachlor epoxide 81
PCB 195 79
BHC (delta) 69
Endosulfan II 66
Endrin 62
Chlordane Totals 53
Oxychlordane 52
Dieldrin 49
Compound # of analyses
PCB 87 47
Total PHC % 45
Toxaphene 37
Alkyl Naphthalene 35
Alkyl Pyrenes 35
PCB Total 33
Alkyl Phenanthrenes 33
PCB 170 32
DDM 31
Nonachlor 31
Naphthobenzothiophene 31
Fluoranthene (C1) 31
Alkyl chrysene 31
Alkyl biphenyl 30
Alkyl fluorenes 30
Alkyl naphthobenzothiophene 29
Mirex 27
Alkyl dibenzothiophene 26
Dibenzofuran (total) 22
Endosulfan I 20
Atrazine 20
Arochlor 1016/1242 19
Arochlor 1021 19
Arochlor 1232 19
Arochlor 1248 19
Arochlor 1254 19
Arochlor 1260 19
DDT 4,4' 19
DDE 4,4' 19
Endrin Aldehyde 19
Methoxychlor 19
BHC (beta) 19
Endosulfan Sulfate 19
Simazine 19
Alachlor 19
DDD 4,4' 19
Dibenzothiophene (total) 5
Benzo pyrene isomers 4
Chrysene isomers 4
PCB 200 3
Benzene 3
Alkyl chrysene isomers 3
PCB 29 1

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