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~ N Cl'I 0: 11I ~ ii' !!l- ei' :::l a :::e III ... CD .. o c:: ~ ~ -I .. CD :::l C. 111 c: 111 5' ce en CD c. 3' (II a o o iil 111 - .. o 3 ~ 0' :::l J:J 11I 111 CD <! o ;;' Table A1. Concentration of pesticides and polychlorinated biphenyls in seven bottom-sediment core samples from Dillon Reservoir, 1997-Continued [<, less than; E, estimated value; DLN, Dillon Reservoir near the dam; DSU and DSL, upper and lower part of the Snake River arm; DBU and DBL, upper and lower part of Blue River arm; DTU and DTL, upper and lower part of Tenmile Creek arm. All concentrations are in micrograms per kilogram. The minimum laboratory reporting level is determined in part by the amount of material available for analysis; less material was analyzed from the core gathered near the dam (DLN)] Core Depth DDE DDD DDT Methoxychlor Mirex Toxaphene PCB Aroclor PCB Aroclor PCB Aroclor identifier (centi meters) 1242 1254 1260 Minimum laboratory 4 100 10 10 10 reporting level DLN 0-2 <1 <1 <1 <4 <1 <100 <10 <10 <10 DLN 2--4 <1 <1 <1 <4 <1 <100 <10 <10 <10 DLN 4-6 1.2 E1.9 <1 <4 <1 <100 <10 <10 <10 DLN 6-8 <1 <1 <1 <4 <1 <100 dO <10 <10 DLN 8-10 <1 <1 <1 <4 <1 <100 <10 <10 <10 DLN 10-12 <1 <1 <1 <4 <1 <100 <10 <10 <10 DLN 12-14 <1 <1 <1 <4 <1 <100 <10 <10 <10 DLN 14-16 1.1 E1.7 <1 <4 <1 <100 <10 <10 <10 DLN 16-18 1.2 E1.9 <1 <4 <1 <100 dO <10 <10 DLN 18-19 1.4 E2 <1 <4 <1 <100 dO <10 <10 Minimum laboratory 0.5 0.5 0.5 2 0.5 50 5 5 5 reporting level DSU 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 DSL 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 DBU 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 DBL 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 DTU 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 DTL 0-2 <0.5 <0.5 <0.5 <2 <0.5 <50 <5 <5 <5 en c:: 3 3 ... o o c:: :::l ~ o o 0' iil c. o