1997 Tissue Concentrations of Chlorinated Pesticides in Mytilus edulis (ng/g dry wt). MECC1 MECC2 MECC3 MECC4 NHRH1 NHRH2 NHRH3 NHRH4 NHDP1 NHDP2 NHDP3 NHDP4 Pesiticide HCB <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 g-HCH 1.5 1.3 1.2 1.1 1.6 1.7 1.6 1.5 <1.2 <1.2 <1.2 <1.2 Heptachlor <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 Aldrin <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 <1.4 Hepta Epoxide <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 "o,p'-DDE " <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 <1.1 1.5 1.6 <1.1 1.2 a-Endosulfan <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 cis-Chlordane 2.4 1.7 1.6 * 1.4 1.2 1.4 1.2 1.8 1.9 1.6 1.4 trans-Nonachlor 1.6 1 <1 <1 <1 <1 <1 <1 1.5 1.6 1.3 1.1 "p,p'-DDE" 5.9 5.5 5.5 3.9 4.6 4 4.4 4.1 9.7 9.9 7.4 7.1 Dieldrin 1.3 1.2 1.3 1 1.1 1.5 1.1 1 1.5 1.5 1.4 1.3 "o,p'-DDD " 1.3 1.2 1.2 1 <0.9 1.1 <0.9 <1 1.8 1.9 1.4 1.4 b-Endosulfan <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 "p,p'-DDD " 4 3 2.8 2.1 6.3 2.2 2.5 2.4 4.1 4.4 4 2.9 "o,p'-DDT " 1.7 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 <1.3 "p,p'-DDT " 1.7 1.1 1 <0.7 <0.7 <0.7 <0.7 <0.7 1.4 1.4 <0.7 <0.7 Mirex <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 Total 21.3 16.1 14.7 9.2 15 11.7 11 10.2 23.4 24.1 17.1 16.4 Surrogate Recovery (%) g-Chlordene 89 84 79 77 84 93 93 87 104 98 75 102